allinone stingasua-ahk: Lawn Boy Service Manual – PDF DOWNLOAD by heydownloads - Issuu - ManualsLib has more than 117 Lawn-Boy manuals

Looking for:

Lawn boy service manual download. 26622228 Lawn Boy Service Manual 1950 88 Complete

Lawn-Boy Service Manual Complete | PDF | Internal Combustion Engine | Vehicle Parts - {dialog-heading}

With these as our standards, we lawn boy service manual download and Lawn-Boy will have continuing success, year after year. Symbol Meaning.

Over the past 60 years lawn boy service manual download American consumer has been offered many kinds of luxuryitems,conveniences,laborsavingdevices,andrecreationand sports equipment. The ingenuity of lawn boy service manual download inventor, combined with engineering and manufacturing know-how, has provided the consumer with many things he would not even have dreamed before.

They have become necessities. As a result, the good service repair shop has started to build and expand. And, the number of shops has increased terrifically inthe past few soundcloud for pc windows. Inventionsare turned into productsreadyfor the.

So, the service business should be good for many, many. Quality manufacturers realizethat the closest link they have with the consumer is that which exists through their service dealers.

We will continue to do everything we can to make servicing accounts work easierand, if possible, more profitable. There willbe atremendous opportunity, in our opinion,in the service repairbusinessduring the next 10 to 15 years. Therewillbemanynew mechanical labor saving devices produced which cannot help /24922.txt demand more, better, andfasterrepairshopservice throughout the country. Lawn-Boy will continue to develop new products and improve design of all their lawn and gardening lawn boy service manual download from year to year.

Advisesyou of information or instructions vital to the operation or maintenance of yourequipment. This mower is designed and intended for the purpose of mowing cutting grass and, when specially equipped with a grassbag, for bagging cut lawn boy service manual download.

Any use for purposes other thanthose noted above could prove dangerous to user. Use lawn boy service manual download following practices for operating your mower safely. These warnings apply to all rotary, gasoline engine powered mowers, regardless of manufacturer. They can be picked up and hurled greatdistances by the blade. Mow only in cleaned ares. Provide someexternal protection for yourself by means of long,heavydenimtrousersand heavy shoes. Never mow when barefoot or wearing open sandals.

Safety shoes are recommended. Disconnect spark plug lead Electric start models; also disconnect battery connections before check. Keep all guards in place at all times. Keep either cover plate or grass catcher chute with bag in place and secure a t all times. Checkgrass or leaf bags for wear or deterioration. Replace bag if /5171.txt. Have a competent serviceman make a thorough inspection of your mower a lawn boy service manual download least once a year.

Always stop engine, источник статьи do not smoke or allow open flames or spark when mixing fuel or refueling. Do not fill fuel tank while engine is hot or running.

Spilling fuel on a hot engine may cause afire or explosion. To prevent possible explosion or ignition of vaporized fuel, do not store mower with fuel in tank or carburetor in enclosure with open flame. Example: Furnace orwater heater pilot light. Fill tank outdoors. Wipe up spilled gasoline. Replace cap securely. Use an approved safety container to handle and store gas.

Keep engine free from accumulations of grass, leaves or excessive grease. These combustible materials could result in a fire. Never больше на странице or run the engine inside where exhaust fumes can collect. Carbon monoxide present in the exhaust is an odorless and deadly gas. Teach all safety rules andoperatinginstructions to all users. Be sure mower will not tip or roll during starting operation. When starting engine, place one foot on top of blade housing s designatedwith heel off the ground to aid stability.

Neverstand infront of self-propelledmowers. Keepclear of dischargeopening. Keep handsandfeet away from moving parts. Neverplace hands or feet under the mower while blade is turning. Stop the engine and make sure the blade has come to a complete перейти на источник and the spark plug wire is disconnected, Electric start models; disconnect battery connections beforeattempting to deanor unclog the catcher assembly or dischargechute.

Alwayspush,never pull, a mower with the /5906.txt running. Mow across face of slopes. Do not mow excessively steep slopes. Control direction of mower by handpressureon the handle, not foot pressure on the mowerhousing.

Do not lag behindor let mower pull you. Keep a firm hold on the handle and walk, never run with mower. Mow in daylight or good artificial light. Never operate equipment in wet grass. Always be sure of your footing. Stopengine before changing or emptying catcherbag,pushing moweracrosswalks,drives,roadsorbeforeleavingoperating position, even for a moment.

I f operating mower on uneven or rough ground,beespecially lawn boy service manual download. Front of mower may drop lower than normal, and hidden objects адрес be thrown by blade.

Keep all four ссылка на страницу on the ground when mowing. I f mower is tipped while blade is turning, Улыбнуло! windows 10 enterprise x64 activator free download Это is exposed and accidents can occur. Avoid striking trees, walls, curbs or other solid objects with mower. Never deliberately mow over any object. Exercise special care when mowing around objects to prevent the blade striking them. If an object i s struck, or mower starts to vibrate.

Replace damaged parts before restarting and operating mower. Excess speed Is dangerous lawn boy service manual download shortens mower life. Stand to one side and keep feet and hands clear while making carburetor adjustments.

Height adjustments should be made only after engine and blade are stopped. Disconnect spark plug lead Electric start models; also disconnect battery connections prlor to performing service on e n g n ie or mower. Keep lead away from plug. Never rotateblade with hand or foot without first removing spark plug wire Electric start models; also disconnect battery connections to prevent starting. Similar to First Patented Mowers. The first mechanical mower of which we have any record was patented in England in by a Mr.

Edwin Budding of Stroud, Lawn boy service manual download. This mower moved on a massive iron roller and featured a reel bladethatworkedagainst a parallelbedplate. The Budding mower gave us the still-popular principleof the reel-cutting blade. Successors to this company are still in business, under the name of Lawn Mower Works. The first power was added inwhen a Mr. The firstline of reasonably moderate-priced mowers was broughtout by thefirm of Ransome,Sims and Jeffries, Ltd.

These mowerswere of lightconstruction andproducedin a number of sizes with varying features. The firstgasolinepowered по этому сообщению mower was patented by Mr. Edward Ransome inand the first successful attempt to market a gasoline powered mower was made by theThomasGreenfirmin The Ransome firmalso mass-producedanelectricmowerseveral yearslater which featuredheadlightsfor night mowing.

Following World War I, mass production and the general awakening of /45561.txt American industrial giant brought forth a host of power mower and hand lawn boy service manual download manufacturers. From to millions of the familiar type hand-push reel mowers were made by scores of manufacturers the in U. Byhowever, the gasolinepowered reel mower began to take a bigger and bigger share of the market. Note the Belt Drive.

This was the first and most siga по этой ссылке of lawn mowing. Power lawn boy service manual download sales in exceeded 5, units. Sales of rider mowers and lawn tractors have grown to overunits annually. Thru the years Lawn-Boy has continuedto improve in design and performance- of Lawn-Boy products. This is one reason why Lawn-Boy is one of the world leaders in the industry. Lawn-Boy is one of the few manufacturers that offers a complete choice of modelsdesignedto fit all mowing requirements.

Fromtheapartmentdweller to the estate owner Lawn-Boy offers a choicetosatisfyall lawn and gardenrequirements.

Lawn Boy Service Manual – PDF DOWNLOAD by heydownloads - Issuu.TORO LAWN-BOY SERVICE MANUAL Pdf Download | ManualsLib

Any use for purposes other thanthose noted above could prove dangerous to user. Use the following practices for operating your mower safely. These warnings apply to all rotary, gasoline engine powered mowers, regardless of manufacturer. They can be picked up and hurled greatdistances by the blade. Mow only in cleaned ares. Provide someexternal protection for yourself by means of long,heavydenimtrousersand heavy shoes. Never mow when barefoot or wearing open sandals. Safety shoes are recommended.

Disconnect spark plug lead Electric start models; also disconnect battery connections before check. Keep all guards in place at all times. Keep either cover plate or grass catcher chute with bag in place and secure a t all times. Checkgrass or leaf bags for wear or deterioration.

Replace bag if necessary. Have a competent serviceman make a thorough inspection of your mower a t least once a year. Always stop engine, and do not smoke or allow open flames or spark when mixing fuel or refueling.

Do not fill fuel tank while engine is hot or running. Spilling fuel on a hot engine may cause afire or explosion. To prevent possible explosion or ignition of vaporized fuel, do not store mower with fuel in tank or carburetor in enclosure with open flame. Example: Furnace orwater heater pilot light. Always store or transport mower with fuel shut-off valve in the "OFF position. Fill tank outdoors. Wipe up spilled gasoline.

Replace cap securely. Use an approved safety container to handle and store gas. Keep engine free from accumulations of grass, leaves or excessive grease. These combustible materials could result in a fire. Never start or run the engine inside where exhaust fumes can collect. Carbon monoxide present in the exhaust is an odorless and deadly gas. Teach all safety rules andoperatinginstructions to all users. Don't start the engine until you are ready to mow.

Be sure mower will not tip or roll during starting operation. When starting engine, place one foot on top of blade housing s designatedwith heel off the ground to aid stability. Neverstand infront of self-propelledmowers. Keepclear of dischargeopening. Keep handsandfeet away from moving parts. Neverplace hands or feet under the mower while blade is turning. Stop the engine and make sure the blade has come to a complete stop and the spark plug wire is disconnected, Electric start models; disconnect battery connections beforeattempting to deanor unclog the catcher assembly or dischargechute.

Alwayspush,never pull, a mower with the engine running. Mow across face of slopes. Do not mow excessively steep slopes. Control direction of mower by handpressureon the handle, not foot pressure on the mowerhousing. Do not lag behindor let mower pull you. Keep a firm hold on the handle and walk, never run with mower. Mow in daylight or good artificial light. Never operate equipment in wet grass. Always be sure of your footing. Stopengine before changing or emptying catcherbag,pushing moweracrosswalks,drives,roadsorbeforeleavingoperating position, even for a moment.

I f operating mower on uneven or rough ground,beespecially careful. Front of mower may drop lower than normal, and hidden objects may be thrown by blade. Keep all four wheels on the ground when mowing. I f mower is tipped while blade is turning, blade is exposed and accidents can occur. Avoid striking trees, walls, curbs or other solid objects with mower. Never deliberately mow over any object.

Exercise special care when mowing around objects to prevent the blade striking them. If an object i s struck, or mower starts to vibrate. Replace damaged parts before restarting and operating mower.

Excess speed Is dangerous and shortens mower life. Stand to one side and keep feet and hands clear while making carburetor adjustments. Height adjustments should be made only after engine and blade are stopped.

Disconnect spark plug lead Electric start models; also disconnect battery connections prlor to performing service on e n g n ie or mower.

Keep lead away from plug. Never rotateblade with hand or foot without first removing spark plug wire Electric start models; also disconnect battery connections to prevent starting.

Similar to First Patented Mowers. The first mechanical mower of which we have any record was patented in England in by a Mr. Edwin Budding of Stroud, Gloucestershire. This mower moved on a massive iron roller and featured a reel bladethatworkedagainst a parallelbedplate. The Budding mower gave us the still-popular principleof the reel-cutting blade. Successors to this company are still in business, under the name of Lawn Mower Works. The first power was added in , when a Mr.

Shanks of "Shanks' Mare" fame patented a Budding-type horse-drawn mower, In a mower using chain drive instead of the Budding gear drive was patented the Silens Messer mower. The firstline of reasonably moderate-priced mowers was broughtout by thefirm of Ransome,Sims and Jeffries, Ltd. These mowerswere of lightconstruction andproducedin a number of sizes with varying features.

In , thePennsylvania MowerCompany patented a side-wheel machine that was driven by' a train of gearing instead of internal gear ring and pinion. The firstgasolinepowered lawn mower was patented by Mr.

Edward Ransome in , and the first successful attempt to market a gasoline powered mower was made by theThomasGreenfirmin The electric power mower made its appearance in the early 's and rapidly gained wide popularity. The Ransome firmalso mass-producedanelectricmowerseveral yearslater which featuredheadlightsfor night mowing.

Following World War I, mass production and the general awakening of the American industrial giant brought forth a host of power mower and hand mower manufacturers. From to millions of the familiar type hand-push reel mowers were made by scores of manufacturers the in U. By , however, the gasolinepowered reel mower began to take a bigger and bigger share of the market.

Note the Belt Drive. Toward the middle of the 's the rotary power mower, featuring a horizontally-mounted cutting blade, began to appear on the American home scene.

This was the first and most siga century of lawn mowing. Lawn-Roy becamethecountry's first Production-linemanufacturers of completepower mowers,includingengines,in the early 's when OutboardMarine boughtouttheRoto Power Mower Company of Kansas City, Missouri, one of the very first rotary power manufacturers. Power mower sales in exceeded 5,, units. Sales of rider mowers and lawn tractors have grown to over , units annually. Thru the years Lawn-Boy has continuedto improve in design and performance- of Lawn-Boy products.

This is one reason why Lawn-Boy is one of the world leaders in the industry. Lawn-Boy is one of the few manufacturers that offers a complete choice of modelsdesignedto fit all mowing requirements. Fromtheapartmentdweller to the estate owner Lawn-Boy offers a choicetosatisfyall lawn and gardenrequirements.

The heart of your mower is theengineandthe D Series is designed to offer years of dependable service. Available with manual orelectric start - self-propelled orpushpropelled type models. The solid state ignition system has no moving parts, is completely enclosed reducing ignition failure while producing up to 30, volts. No points, coil or condenser to replace, offering longer spark plug life. The all new carburetor used on the D Series engine is completelyautomatic.

No adjustmentsother than an atmospheric pressure adjustment is required. A new primer system forces compressed air into the float chamber which forces fuel into the carburetor venturi. This method of priming is effective and consequently, one prime is usually sufficient to start the engine.

The larger muffler design reduces noise and exhaust down into the turf. Excessive noise and exhaust fumes are eliminated. In thefuture Lawn-Boy will continue to improve to offer you, the dealer, and your customers the best product available. The fewer final result Contain and manufacturing is an all new look from the "grass up. Lawn-Boy has retained and refined all theoutstanding features that have made us famous. Easy fingertip starting - a reduced4 to 1 gear ratio resulting in the easiest starting mower in Lawn-Boy'shistory.

Quiet operation. The welded muffler assemblycontainsan additional baffle and muffler tube. Designed as a one-piece assembly secured to the mower with only three screws. Super vacuum action - the design of the mower housing and famous durable Lawn-Boy high lift bladehasbeen improved to discharge clippings into the rear of the grass bag -- this creates a well manicured mowing appearance.

Alsoaddedunderthedeck is a crankshaftsupportlocated approximately 2 inches above the blade to provideadditional protection for the crankshaft and crankcase. One is the blade,brake, clutch BBC system which stops the blade within 3 seconds after the operator releases thebail. The engine continues to run with this system. The other is a flywheel brake system which stops both theblade and engine within 3 seconds after. An automated, computer-controlled machine manufactures two pieces into a cylinder blockassembly that has uniformity and precision.

Minimizes compression blowbyto increase usable power, improve fuel economy and aid startingease. The crankshaft, top and bottom, as well as the connecting rod, are nestled in precision needle bearings, resulting in free running, smooth operation. Silverplated bearing liner at the big end of the connecting rod. Lawn-Boy mowers meetor exceed current A. Ib safety standards for rotary-type mowers. We proudly display this Outdoor Power Equipment Institute seal on each machine.

Displacement is increased from 6. Rotary mowers are generally designed with a housing on top of four wheels to support the which is mounted the engine,andwith cuttingblade mounted horizontallyinside and beneath the housing. Theblade is designed to "lift" the grass as it rotates, by creating an upward flow of air. This insures even cutting. On the rotary mower, heightof cut is changed by changing the wheelheight. The cutting blade is usually attached directly to the engineshaft,and is generallymade of tempered steel of varying widths.

Length of the cutting blade is determined by the size of the mower housing. Rotary mowers are capable of cutting level, The housing covers the blade, channeling thecleanlawns, as well as roughlawns. They flow of g r a s s out a dischargechute. Ridding are limitedintheircuttingabilityinheight thehousing of cut g r a s s e s is a necessity, of grass or weeds ,only by theamount of to be discharged.

There are four main Differences in the operation of 4-cycle and 2-cycle engines: POWER - Number of power strokes per crankshaft revolution.

Piston moves up in cylinder. Piston movement creates vacuum in crankcase. Fuel Entry Reed valve opens. Fuel air vapor enters crankcase. As piston reaches top of cylinder, fuel vapor in cylinder is compressed. Explosion forces piston down, delivering power. Fuel entry valve closes. Exhaust ports open, burned gases escape. Downward movement of piston creates pressure in crankcase. Intake ports openas piston moves by - Crankcase pressure forces fuel vapor to rush into cylinder.

Incoming fuel vapor clearscylinder of all burnedgases. Fuel enters compression chamber cylinder. Fuel vapor is being compressed for igniting. Exhaust valve is open.

Burned vapors are forced out of cylinder. The 4-cycle engine requires a separate system of lubrication, with anoilsump that must be kept full and operated on a fairly level surface to prevent lack of lubrication to internal moving parts.

The 4-cycle systemincludes an oilreservoir,slinger or oil pump which are ineffective if the mower engine is run with a low oil supply or tilted to an extremeangle ,oftenresultingin damage to the engine.

The 2-cycle engine is always lubricatedas long as there is a fuel mixture in the fuel tank. No attention to oil level is required, as the oil is pre-mixed with the fuel. The engine is kept lubricated regardless of angle of operation. The oil, suspended in the fuel vapor, adheres to the surfaces of all the moving parts, keeping them continually coated witha film of oil.

Include timing gears, cam shaft, intake and exhaust valves, slinger or oilpump, springs. All are additional parts required for 4-cycle engines. These create morefriction,more wear, and requiremoreequipment,extra replace. These can be repaired o r replaced with the simplest of working tools.

No valves to grind, cam shafts, push rods,timinggears,valvesprings,etc. It is also used for servicing the F Series engine used on select Lawn-Boy walk mowers through This manual, form , is several hundred pages long. For ease of use in electronic form, this manual has been broken down into numerous smaller files. Please ensure the file you are viewing is the correct one for the machine being serviced. Model A B A B A A Year Serial Range AA BB CC AA AA AA AA BB BB BB DD DD DD Using This Manual - Section 2 Model C C C B.

Serial Range Serial Range DD Using This Manual - Section 2 Model A A A. Serial Range FF BB CC DD BB CC DD DD EE EE FF GG GG BB CC DD FF GG HH JJ AA AA BB CC Using This Manual - Section 2 Model A Serial Range CC AA AA BB CC BB CC DD EE GG CC DD EE BB CC DD CC DD EE FF GG GG GG AA Using This Manual - Section 2 Model X A A B. Serial Range FF GG HH JJ AA AA BB CC DD EE FF GG Serial Range AA BB CC DD EE BB CC DD BB CC DD EE EE FF GG GG Using This Manual - Section 2 Model B C D D F F G G G G G S S Serial Range AA BB CC DD GG AA BB CC DD EE CC DD CC DD CC DD FF Using This Manual - Section 2 Model Serial Range GG HH JJ EE AA BB CC DD EE BB CC Serial Range LL LL LL LL LL LL LL LL LL LL LL EE AA BB CC DD EE AA CC DD Serial Range EE CC EE FF GG FF GG AA BB Serial Range AA BB CC DD BB CC GG Serial Range AA EE BB BB CC CC DD EE FF GG GG CC DD EE EE Serial Range AA CC DD EE FF GG GG GG EE CC DD EE GG EE FF EE FF GG FF GG HH JJ Serial Range AA BB AA CC BB BB CC DD EE CC DD EE Serial Range FF GG EE FF GG GG GG AA BB CC DD EE AA BB BB CC DD CC DD BB CC DD Serial Range CC AA AA AA BB BB CC GG Serial Range HH HH HH JJ JJ HH KK KK JJ KK KK KK KK KK HH HH HH HH JJ HH HH JJ KK HH Serial Range HH JJ KK AA CC DD BB CC CC EE EE EE AA AA BB CC BB BB CC EE HH JJ KK HH HH HH Did he say "hello," then rush you right into the operating room and remove your appendix?

If he did, he would probably soon lose most of h i s patients, in one way o r another. What he probably did first was to set youdown and ask you some questions. Thenheprobably blood pressure, made a few tests, such as temperature, etc.

With the results, he could make more specific tests and arrive at an accuratediagnosisbeforetreating you. Because of your doctor's training and careful diagnosis, you haveconfidence in him.

You, as a service repairman, can instill confidence in your customers by a careful diagnosis of their mower troubles. Your doctor takes your temperature, checks your pulse, heart, etc. A service repairman must also follow a set procedure in trouble diagnosis to make fast and accurate repairs. Fill out a brief report with the-customers help. Put this information on the repair ticket which will be attached to the mower. Unless the failure is obvious, this may help the mechanic later on, especially if work is delayed for several days.

Note obvioH damage, removal or alteration of safety equipment such as trailing shield, toeguard,interlockcable etc. This may protect you if any questions arise later as to the responsibility for damage.

Was it used in a small or large yard, at home only o r often lent out? Was it used on level, clean lawns, rough ground, vacant lots, heavy weeds, etc? Findout what kind of gasolineandoil is used. Pull the engine through with starter rope, and if it binds o r is dry internally indicating lack of oil show the customer. Trainyourmechanicsin set diagnosisprocedures. Normally,diagnosis takes very little time in the beginning, and will probably save a great deal of time in eliminating unnecessary repair work.

Be sure there is clean fuel in tank. Be sure gas cap vent and fuel shut-off valve are open. Feel for compression as you pullenginethrough. If engine spins very easily, it has little if any compression. With little compression, there will be little o r no power. If engine resists pull of starter rope, it has compression. If you spin an engine with good compression fast enough, you can hear the carburetor sucking air--and kick-.

While checking for compression, also listen for any scraping or squeaking internal noises. These noises indicate piston and cylinder scoring. If you hear such noises, do not t r y to start the engine, but turn to Section 8, Engine Repair Procedure,. Take out the spark plug and examine it. Be sure that theelectrodesareclean and the gap is. Check theporcelain, If it is cracked,the plug won't fire. If the end of the plug i s wet, at least youknow fuel is gettingthrough. As a further check toseethat fuel is gettingthrough,placeyourthumboverthe spark plug hole, and pullthe starter cord several times.

Your thumb should be wet with fuel, b. Check spark plugusing specialtoolpart no. The spark should be hot blue and snapping. A weak spark is orange, and makes little, if any, noise. It only takes a few minutes,andthese few minutes could save you hours.

If the new plug won't fire, remove the plug from the lead wire and place a bolt in the rubber hood, 'making contact with the spring terminal. If you don't get a spark at this point then you have ignition problems. Remove spark plug from cylinder. If fuel mixture is entering cylinder your finger will be wet.

If fuel is not entering cylinder refer to Section 4 for complete carburetor repair. Always check fuel tank make sure it is clean and contains no water. Air filter element must be. This restriction, results from a build-up of carbon deposits.

Therefore, the muffler plate should be removed every 50 hours of operation o r at the end of the mowing season and the exhaust ports checked for carbon accumulation. This routine maintenance check is not only of vitalimportanceto eliminate loss of engine power, but to eliminate particles of carbon from breakingaway, enteringthepowerhead and causingpiston scoring.

Most oilis not made for burning and therefore, results in heavy accumulation of carbon. Tocleanexhaustports,tip mower on its side and secureinthis position. Remove nuts securing muffler cover to muffler plate and remove muffler cover. On some models the blade, blade stiffener, and adapter plate must be removed prior to removing muffler plate. Pull starter rope slowly until piston covers theexhaustports. Place mower in upright position and pull starter rope several times to blow out carbon.

Cleanmufflercoverand coverplate and re-securecoverplateto mufflerplate. If it wasnecessary to remove blade, torque blade nut to 50 ft. Torque blade bolt to ft. Replace spark plug and reconnect high-tension lead. Upper and lower crankshaft seals Worn seals maydevelop leaks, which permit air to enter o r leave crankcase, impairingthecompression and vacuumcycle.

Upper armatureplate sealon. Thisprovidesmorepositivesealing to prevent oil leaking past and fouling breaker point. Gaskets Defective gaskets can allow a i r leakageinadditiontooilleakage.

The results are the sameas leaky seals. Screws and bolts Inspect for tightness. Loose screws or bolts can alsopermit air to enter or leave, impairing the compression and vacuum cycle.

Majorcastings Check forporosityin the carburetor, crankcase, cylinder, and magneto plate. Porosityresultsfrom a defect in the casting process, and is indicated by tiny a i r holes i n thecasting. This condition also results in air leaks. In some cases, the use of a penetrating ink will reveal hidden holes. A poor seal results in air and oil leakage, impairing the compression and vacuum cycle. Referto Section 8 for correct installation of crankcase halves. Check f o r worn o r damaged upper and lower main seals.

Worn seals may develop leaks, which permit air to enter or leave crankthe compression and case, impairing vacuum cycle. Check power take-off shaft seal for damage or wear. A worn or damaged sealresults in oil leakage and lower crankcase pressures. Approximately every 50 hours and at theclose of the mowing season check for excessive carbon accumulationinexhaust ports and muffler baffle.

This routinemaintenancecheck is not only of vital importance to eliminate loss of enginepower,but toeliminateparticles of carbonfromenteringthecylinder,causing piston scoring. Most oil is not made for burning and therefore,resultsin heavy accumulation of carbon.

To cleanmufflerbaffleandexhaustports, its side. The hub is taperedto fit thetaper of thecrankshaft. Tap the hub with a fiber hammer to loosen it from the crankshaft. Remove three bolts securing crankshaft support and muffler to mufflerplate. Remove crankshaftsupport and muffler baffle. Reinstall adapter hub, blade stiffener washer on 21" models ,blade and blade nut.

Torque blade nut to 50 ft. Pull starter handle slowly until piston covers the exhaust ports. Place mowerin operating position and pull starter handle several times to blow out carbon deposits. Reinstall mufflerandcrankshaftsupporttomower. Use special tool partno. The job of the carburetor is to combine liquid gasoline with air to forman explosive gaseous mixture.

Gasolinein a liquid f o r m i s not explosive. Even a atomizer, or an insecticide sneeze is comparable,where air from the large lung area is ejected through the smaller nose and mouth openings, picking up secreted liquids and coming out in the form of a vapor. The crankshaft rotates when the starter rope is pulled. The rotatingcrankshaftmoves. Thevacuum created by movement of the piston upward in the cylinderopens a reed valve then air rushes through the throat of the carburetor.

When air rushes through this tube, the air pressure at the center is less. By inserting a tube from the carburetor float bowl into this center area, the difference in air pressure will forcefuel up through this tube, where it is picked up by,andmixedwith, the air. A s fuel and air mixture enters the crankcase through the reed valves, it is near a gaseous state. Theengine, when cold, will not vaporizethemixturecompletely. As theengine warms up, the mixture is heated in the crankcase and becomes a consistently even gas.

Start yourinspection with the fuelusedinthe2-cycle engine. Make sure yourcustomer knows the why and howof fuel mix preparation. The supply can, from which fuel is poured into the enginetank,shouldhave a water and dirt retardomg screen. Later D Series Deluxemodels a r e equipped with aplastic gas tank assembly eliminating condensation, rust and a r e not affected by fuel mixture. Duringstorage,the tank should be empty, and the mower stored in an area not subject to extreme temperature change.

Tank caps have a plainvent hole. A closed vent will create a vacuum in the tank a s fuel is used the engine will run a few minutes and stop. In a few minutes the vacuum will decrease and the engine can be started again, but it will stop again in a few minutes. The vent hole can become clogged with dirt. This can opening the valve and observing for fuel flow through the valve. Replace the valve and screen assembly if gummed up, rusted, or if packing is damaged.

NOTE Shut-off valve should be open and packing nut loose before screwing assembly into Secure assembly to tank, then close valve and tighten packing nut. Wing should turn easily, but snugly.

As filter becomes saturated, incoming air picks up more fuel, causing greater flooding. A puckered filter will allow air and dirt to bypass filter. Make certain that filter covers cup area. If oiled, properly,filter is very efficient. First wash out with hot, soapy water. Wring out and dry completely, then apply 10 to 15 drops of oil.

Squeeze several times to distribute oil. Later D Seriesmodels have a plastic air cleaner. To remove grasp the cover lip and pull back o r fold down as required. A thorough visualinspection will determinethefuelsystem used on the engine.

The float valve consists of a needle and seat assembly, activated with a float in the float bowl. Theneedle is steel with rubbertip seat brass, materials which will andthe not readily adhere together.

The needle rests on the float arm, held in place by a spring clip on later models. Operation is automatic. When the float bowl is empty,thefloat rests on the bottom of the bowl. As fuel enters bowl of carburetor, the float rises, moving needle into seat and shutting off fuel. As the engine usesfuel, the float drops slightly, allowing more fuel toenter bowl, maintaining a constantfuel level in bowl. The needle and seat must be replaced as an assembly. The cork float coated with an epoxy sealer.

If the solventremovesthe epoxy, thefloat will absorb gasoline and its floating characteristics will change. Then open needle two turns. Start engine. If engine beginstodie, open carburetoradjusting knob by turningcounterclockwise. If engine runs roughly, close knob by turning clockwise until engine smooths out. Let engine run for about 5 minutes to warm up. Carburetors on earlier "D" modelengines also contain a slow speed adjustment. The correct setting for this adjustment is 1 turn open.

This jet is pressed into the low speed passage and the passage opening is sealed with a lead shot. Remove float bowl and gasket. Invert carburetor. To adjust; bend metal a r m with needle nose pliers. DO NOT attempt to bend by applying pressure to cork float. Carburetorservicingconsists of inspection,cleaning, adjustment, and replacement of faultyparts.

Toremovecarburetorfromengine,carburetor and reedplatemustberemoved as an assembly,. Carburetor service assemblies include 2 thread forming screws. The reed plate mounting flange on the carburetor is drilled but not tapped.

These screws form a very tight fit eliminating the possibility of screws vibrating loose during engine operation. A solvent will remove the varnish from the float. Inoperative floats should be replaced. Inspect valve needlesfor grooves or other defects.

If grooved or otherwise defective, replace. Use a magnifying glass in the inspection. Tiny scratches or worn surfaces affect the operation. Be careful in handling reeds, so as not to distort them. The reeds mustlieflatagainst the reedplate to form a perfectseal. Bent or otherwise damaged reeds cannot be repaired. Check the reed plate for warpage. Maximum clearance allowed between reed tip and reed plate is.

If clearanceexceeds this, reeds must be replaced. Prior to installing nozzle filter clean carburetor, high speednozzle,fuel tank, fuel shut-off valve and filter assembly. High speednozzlemustberemovedtoclean it properly.

Hold float up and lift bowl carefully in place. For easier installation, take carburetor off and turn upside down. A burr on the throttle shaft arm which holds governor rod in place can cause a drag. This can contribute to surging. Repair - clean off burr, check governor rod for wear. This means the oil and gasoline must be mixed together. Failure to use theproper fuel mixture will result in serious damage to the engine. If not readily available, use a good grade of two cycleoil from a reputable oil company.

Use clean container. Mix thoroughly. DO NOT mix fuel directly in mower fuel tank. M i x one full can with 2 gallons U. Follow instructions on can. Athorough visualinspection will determine the fuelsystem used on the engine. Fuel tanks must be vented to prevent vacuum forming and stopping flow of fuel. Tank caps will have a vent hole. A closedvent will create a vacuum in the tank as fuel is used andeventuallycausetheengineto stop. In a few minutes the vacuum will decrease and the engine can be started again, a shortperiod of but it will stopagainin time.

Theventholecanbecomeclogged with dirt. Checkventhole before each operation and clean if necessary. Thecarburetorused on Solid State C. No fuel adjustments are necessary,toregulatefuel the intake. Asingle,meteredjetallows correct amount of fuel to mix with the incoming air which is regulated by a single adjustingneedle that is explained on page of this section.

Adjustmentmustbe changed when a significant changein altitude is encountered. The fuel tank screen assembly or the shutoff valvecanbecome clogged. Thiscan be checked easily by removingthefuelhose, opening thevalve and observingforfuel the fuel flow through the valve. Replace shut-off assembly if damaged. Shut-off valve is secured to fuel tank with a springclip;exercisecare when re-installing to fuel tank. If engine is flooded, fuel can drain back into filter.

A s filter becomes saturated, incoming air picks up morefuel,causing greater flooding. A puckered filter will allow air and dirt tobypass filter. If oiled NOTE properly, filter is very efficient. First wash out with fuel, then apply 10 to 15 drops of oil. Squeeze severaltimestodistributeReinstall filter inthesameposition oil. Install air filter case correctly.

Hinge on To removegraspthecover,loosensnap andbottom. If installedupside down the fold cover down. Examine the primer system. Instead of into the float bowl chamber which forces lifting fuel up in the carburetor throat as fuel ininto the carburetor venturi. The carburetor is completely automatic. There are no adjustmentsto be madeto regulate the amount of fuel entering the carburetor venturi. There is anatmospheric pressure adjustment that would have to be made if the engine is operatinginvery high o r very low altitudes.

All D series andmodular carburetors require a finaladjustment of the altitude needle prior to putting the mower into service. Observe engine operation. After carburetor adjustment is completed,shut off engine. It should start within 2 pulls on starter handle. Slowly turn altitude needle counterclockwise until engine is runningsmoothly. Allow engine to run for one or two min-. The governor will control the amount of fuel entering the engine. The purpose of the atmospheric pressureadjustingneedle is tomix the right amount of fuel with the correct amount of incoming air.

NOTE In the closed position no air is entering the carburetor ventpassage. Therefore, the float bowl pressure has been eliminated and the fuel supply tothe carburetorventuri is cut off. Examine float appearance. Should be glossy because of epoxy sealer. If dull in appearance, o r portions of epoxy has chipped away replace.

The float valve consists of a needle and seat assembly,activated by a floatinthe carburetor bowl. The steel needle is rubber tipped and theseat brass. This combinationeliminatespossiblesticking and provides a perfect seal. Theneedle rests on float arm, held inplace by a spring clip. When float bowl is empty,float rests on bottom of bowl, As fuel enters bowl of carburetor, float rises, moving needlevalveinto seat and shutting off fuel.

As engine uses fuel, float drops slightly, allowing more fuel to enter bowl, maintaining a constantfuellevelin bowl. Needle and seat must be replaced as an assembly. They are matchedtoform a perfect seal. If replacement of shaft or disc is necessary, use this assembly number. Removefloat bowl andgasket. To adjust; bend float arm with long nosepliers.

DO NOT bend by applying pressure to cork float. Bend arm only by grasping with pliers. Early productionmodelsusedplastic throttle shaft and snap-in disc. Inspect disc for wear or burrs. Replace if necessary with shaft, disc and screw assembly part no. Remove '"E" ring and slide throttle shaft fromcarburetor body. Inspect plastic throttle shaft forwear and replace if required with shaft, disc and screw assembly part no.

Reassemble in reverse order making suresmall holeinthrottle disc is installed facing reed plate assembly. NOTE Always place correct tension on throttle shaft spring when installing. Reed plate assembly may be cleaned with samesolventusedtocleancarburetor. Exercisecarein handling reeds, so as not todistort them. Bent ordistorted reeds must be replaced. Check forexcessiveclearance between reedtip and reedplate as illustrated.

Maximum allowed clearance. The new modular carburetor was introduced in the D s e r i e s engines and later production D s e r i e s engines. This new carburetor is constructed of a special injection molded plastic material. The body and air filter chamber is a one-piece plastic assembly which "plugs" into the reed plate and is secured by a singlescrew.

An Oringinstalled between thecarburetor and reedplateinsurespositivesealing. The float and fuel valve is also a one-piece assembly. Thisassembly rests on a spring locatedintheplasticfloatchamber. The spring provides vertical tension against the float forcing the fuel valve into the fuel inlet seat when thefloatchamber is full of fuel. As fuel enters a single metered jet it is mixed with incoming air to form the correct combustiblemixture. Theamount of fuel flow through the metering jet is regulated by the altitude needle.

Adjustment procedure is same as earlier D series carburetors. Refer to page for adjustment procedure. The purpose of theatmosphericpressure adjusting needle is to mix the right amount of fuel with the correct amount of incoming air.

The correct procedure to install the carburetor is to lubricate the O-ring in groove of the reed plate and "plug" in the carburetor. An O-ring seals between theouter. When installingorremovingcarburetor from engine, the governor rod must be removedfromthethrottle arm. Always plastic. DO NOT cleanusing a standarduse new gasketduringreassembly. Disassemblecarburetor components,washand cleanusing a goodNOTE grease solvent, dry andclean parts with compressed air DO NOT dryusing a If any partappears worn o r damaged, ensure proper float cloth, lint may block passages impeding replace it.

To proper carburetor operation. After cleaning, inspect all parts. Check After assembling float chamber to floatandfuelvalvesfor cracks or damage. Check float chamber for ment. If no sound movement is cracksor damage.

Check dump valve and heard remove float chamber and regasket for distortion or damage. Check install correctly. It providesverticalpressuretothefloat and fuel valve forcing the fuel valve into the fuel inlet to stop the flow of fuel when the bowl hasfilled. Each end of the spring is located in a recessedarea. The walls of these recesses provide guidance for vertical movement of the float and fuel valve. Without these walled recesses the float and fuel valve would move laterallypreventingthe fuel valve from entering the fuel inlet seat squarely.

Mowing at an anglesuch as a terrace could result in a carburetor flooding without these recesses. As filter becomes saturated, incoming air picks up more fuel,causing filter will greater flooding. A puckered allow air and dirt tobypassfilter.

If oiled properly, filter is very efficient. Squeeze several times todistribute oil. If engine"smokes"for no apparent with fuel reason,filter may besaturated mix or may need cleaning. Reinstall filter in the same position which it was removedtoprevent imbedded particlesin intake side from entering carburetor. A pneumatic primerforcescompressedair intothefloat bowl chamber which forces fuelintothe carburetor venturi. This will preventthe starter pulley fromdamagingthe hoses.

Exercisecare when installing hoses. Do not pull hoses taut in either direction. Leave sufficient slack in hoses to prevent contact with starter pulley. If twisted, it is possible for hoses to be damaged by starter pulley. Exercise care when installing hoses.

Remove fuel line from carburetor to determine if fuel is flowing from tank thru tank filter, valve and hose. If not, remove hose from tank valve. Turn valve on to determine if fuel is flowing from tank. If so, restriction is in fuel hose.

Wash out in solvent and blow with compressed air. Check function of primer bulb and hose. Place finger over lower end of primer hose and press primer bulb. Resistance should be noted in bulb depression.

Remove finger, there should be no resistance present when bulb is depressed. Depress primer bulb and place finger over end of hose. The bulb should remain collapsed. If not, replace primer bulb and hose assembly. If fuel is spurting from nozzle,. Remove float chamber. Check float level adjustment. Check to make sure movement of float and float arm is free. Check the throttle valve and shaft for freedom of. The new modular carburetor was introduced in the D seriesenginesonallutilitymodels.

An O-ring installed between the carburetor and reed plate insures positive sealing. The modular carburetor has been redesigned featuring a new float chamber, gasket, float and carburetor body. A hinged type float of special cork material is sealed with an epoxy.

During inspection, if. As fuelentersasinglemetered jet it ismixedwith incomingair to form the correctcombustible mixture. Theamount of fuelflowthrough the metering jet isregulatedby the altitude needle. Both are replaceable. Fill the tank with clean, fresh, unleaded, properly-mixed fuel.

Keep all nuts, bolts, and screws tight to ensure safe operation. Remove the buildup of grass clippings and dirt. Self-propelled mower only. Clean grass clippings and debris under drive belt mechanism cover and drive belt. Once every season, or every 50 hours, clean the air filter housing and element. Do so more frequently under dusty conditions. Use heavy-duty gloves to hold the blade while removing the nut. Remove the muffler see Figure Clean as 1.

Install the exhaust pipe into the engine base see needed. Figure Figure 12 Figure 10 2. The cover on the exhaust portion of the engine base uses a high temperature silicone to seal the 2. One with an air filter box on the mower engines DuraForce and one without an air filter box on the snowthrower engines R tek.

Differences include a plug in the snowthrower carburetor vent passage and some minor differences in the throttle shafts, jetting and throttle valve bleed hole. Disconnect the primer tube from the carburetor 4. Disconnect the primer tube from the carburetor fitting. See Figure Pull the carburetor assembly down and away from 5.

Disconnect the governor spring from the the engine such that the air vane governor clears adjustment arm, and remove the choke cable. Hold the governor collar on the carburetor and lift 4. For of the carburetor. Remove the decal and the pilot DuraForce engines only - Lift the collar and spring jet. Remove the float hinge pin, the inlet valve needle 9. Remove the high speed jet A from the nozzle B. If the nozzle Apply one drop of Loctite or equivalent to the seat threads, and install a new brass inlet fuel valve seat see Figure Install the high speed jet into the fuel nozzle.

If the nozzle has been removed, turn the carburetor over. Pressure check carburetor. Attach pump with Install a new fuel bowl gasket and the fuel bowl pressure gauge to fuel inlet fitting on carburetor with the four bowl retaining screws see Figure With carburetor upside down float up , raise float and lower to its normal position.

Install the air vane and throttle shaft into the carburetor body by very carefully pushing the shaft through the collar into the carburetor body. Push the throttle plate into the throttle shaft. The plate only inserts one way. If the throttle plate does not fit snugly, replace the throttle shaft. For R tek piston ported engines refer to the specification pages.

Should the governor link A be bent or replaced, adjustment will be necessary. Figure 39 Piston Ported Engine To remove the air filter, unsnap the wire holder on the right side of the cover the cover. Rotate the cover open. The air filter element can now be removed. If you wish to remove the cover, rotate it full open and unhook it from the hinge. The fuel cap may not be disassembled; however, replaceable 75 micron in-tank filter screen.

The filter is the vent opening on the cap and inner sealing disc welded in the bottom of the tank over a sediment should be kept free of debris. Check spark plug with the chart in this subsection and replace following the specifications given on this page. Clean with a wire brush removing the carbon buildup. This action triggers the silicon controlled rectifier SCR enabling easier 1. Remove the flywheel by pulling up on the edge of flywheel while striking the flywheel nut with a soft hammer.

The flywheel is connected directly to the crankshaft secured by a flywheel key and nut and turns at the same speed as the crankshaft. Inspect the flywheel for cracks or damage and the 4. Torque flywheel nut to specifications see Figure strength of the magnets using a iron object.

Replace as necessary. Figure 59 Figure 57 Flywheel Installation 1. This recoil starter is a pressed together assembly. Due to the low cost of the assembly, we do not stock individual parts.

Tie a single knot in the end of the rope; then singe the end with a lighter to prevent the knotted end of the rope from fraying see Figure Tie a simple knot in the rope to prevent too much from retracting until the starter handle is installed.

The DuraForce is a reed valve engine, and the R tek is piston ported. Further movement of the piston towards the crankcase In a piston ported engine, there are no reed valves.

allinone stingasua-ahk

Saturday, April 29, 2023

Lawn Boy Service Manual – PDF DOWNLOAD by heydownloads - Issuu - ManualsLib has more than 117 Lawn-Boy manuals

Looking for:

Lawn-Boy Service Manual Complete | PDF | Internal Combustion Engine | Vehicle Parts - {dialog-heading}

Lawn Boy Service Manual – PDF DOWNLOAD by heydownloads - Issuu.TORO LAWN-BOY SERVICE MANUAL Pdf Download | ManualsLib

No comments:

Post a Comment

Windows 10 Enterprise ISO download.

Report Abuse