Bolens 643B, 643C, 645A warranty Transmission Gear OIL Service, Bolo Tines

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Maintenance

TRANSMISSION GEAR OIL SERVICE

Check the transmission gear oil level after every 30 hours of operation or whenever you notice any oil leak. Operat- ing the tiller when the transmission is low on oil can result in severe damage.

A. To Check the Transmission Gear Oil Level:

1. Check the gear oil level when the transmission is cool.

Gear oil will expand in warm operating temperatures

and this expansion will provide an incorrect oil level

reading.

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WARNING

Before clearing the tines by hand, stop the engine, allow all mov- ing parts to stop and disconnect the spark plug wire. Remove the ignition key on electric start models.

Failure to follow this warning could result in personal injury

See your engine manual packaged with your unit for detailed instructions pertaining to starting the engine.

2.

With the tiller on level ground, pull the Depth Regula-

 

tor Lever all the way up.

3.

Remove the oil fill plug (A, Fig. 5-2) from the transmis-

 

sion housing and look inside the oil fill hole to locate

 

the main drive shaft situated below the hole.

4.

The gear oil level is correct if the gear oil is approxi-

 

mately halfway up the side of the main drive shaft.

5.

If the gear oil level is low, add gear oil as described

 

next. If the gear oil level is okay, securely replace the

 

oil fill plug.

IMPORTANT: Do not operate the tiller if the gear oil level is low. Doing so will result in severe damage to the transmission components.

6.If adding only a few ounces of gear oil, use API rated GL-4 or GL-5 gear oil having a viscosity of SAE 140, SAE 85W-140 or SAE 80W-90. If refilling an empty transmission, use only GL-4 gear oil having a viscosity of SAE 85W-140 or SAE 140.

IMPORTANT: Do not use automatic transmission fluid or motor oil in the transmission.

7.While checking frequently to avoid overfilling, slowly add gear oil into the oil fill hole until it reaches the halfway point on the drive shaft.

8.Securely replace the oil fill plug.

B. To Drain the Transmission Gear Oil:

The transmission gear oil does not need to be changed unless it has been contaminated with dirt, sand or metal particles.

1.Drain gasoline from the fuel tank or run the engine until the fuel tank is empty. See “DANGER” statement below.

WARNING: Gasoline is highly flammable and its vapors are explosive. Follow these safety practices to prevent personal injury or property damage from fire or explosion.

•Allow the engine and muffler to cool for at least two minutes before draining the tiller’s gasoline tank.

•Do not allow open flames, sparks, matches or smoking in the area.

•Wipe away spills and push tiller away from spilled fuel.

Figure 5-2: Remove oil fill plug (A) to check gear oil level and to add gear oil. Remove four cover screws (B) to drain gear oil.

•Use only an approved fuel container and store it safely out of the reach of children.

•Do not store gasoline in an area where its vapors could reach an open flame or spark, or where ignition sources are present (such as hot water and space heaters, furnaces, clothes dryers, stoves, electric motors, etc.)

2.Drain the oil from the engine.

3.Remove four screws (B, Figure 5-2) and remove transmission cover and gasket.

4.Remove the left-side wheel.

5.Tilt the left-side wheel shaft into a drain pan and allow the gear oil to drain through the top of the transmis- sion.

6.Reinstall the wheel.

7.Install a new gasket (do not reuse old gasket) and reinstall the transmission cover.

8.Refill the transmission using GL-4 gear oil (SAE 85W-140 or SAE 140).

9.Refill the engine with motor oil and replenish the fuel tank with gasoline.

BOLO TINES

The bolo tines will wear with use and should be in- spected at the beginning of each tilling season and after every 30 operating hours. The tines can be replaced either individually or as a complete set. See the Parts List pages for tine identification and part numbers.

A. Tine Inspection:

With use, the tines will become shorter, narrower and pointed. Badly worn tines will result in a loss of tilling depth, and reduced effectiveness when chopping up and turning under organic matter.

B. Removing/Installing a Single Tine:

1.With the engine shut off and the spark plug wire disconnected, remove the two screws (A, Figure 5-3) and nuts (B) that attach a single tine to a tine holder. If needed, use penetrating oil on the nuts.

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Contents 772C0845 02/24/2006Table of Contents Operation TrainingPreparation Heed ITS WarningMaintenance & Storage Never pick up or carry machine while the engine is runningLoose Parts List AssemblyAssembly Steps IntroductionMove Tiller OFF Crate Outside of the handle- bar assemblyImportant The support brackets must be assembled to Wheel shaft LInstall Forward Clutch Cable Thread the screw V into the cable adjusterThread the #10-24 hex nut Z, Fig Check Hardware Check Transmission OIL LevelADD Motor OIL Check all nuts and screws for tightnessIntroduction Features ControlsWheel Drive Pins Engine ControlsDepth Regulator Lever Forward Clutch BailTo operate the Forward Clutch Bail Reverse Clutch Control Models 643B & 645A onlyHandlebar Height Adjustment To adjust the handlebarsIntroduction BREAK-IN Operation Pre-Start ChecklistFeatures and Controls Starting and StoppingOperating the Tiller Release all controls on the tillerStopping the Engine and Tiller Reduces tractionFreewheel Stopping the Tiller and EngineRead the following recommendations before tilling on slopes Tilling Up and Down Slopes Vertical TillingAvoid Tilling Soggy, Wet Soil Terrace Gardening Loading and Unloading the TillerCheck for OIL Leaks Maintenance Schedule ProcedureTiller Lubrication Check HardwareTransmission Gear OIL Service Bolo TinesRemoving/Installing a Tine Assembly You have good footing. Never permit tillerDrive Belt Tension Models 643B & 645A Replacement Belt InformationOnly To Check Reverse Belt TensionOFF-SEASON Storage Engine Cleaning AIR Cleaner Service Engine OIL ServiceSpark Plug Service To Check the Engine Oil LevelTrouble Shooting Warranty Page Parts List Pièces Détachées Adressez-vous au «Service après-vente»La page 2 pour ce qui concerne les pièces et/ou accessoires Use as required to obtain between Part Description RÉF Pièce Page Part Description RÉF Pièce For parts and/or accessories refer to customer support on Page Garantie Juridictions les selonDépannage Lles -ÉTINCE-PARE L’ÉCRAN DE Entretien Bougie LA DE EntretienTeur -CARBURATEUR/RÉGULA DU Réglages Moteur à l’huile changer Pour .BMoteur DU Nettoyage Moteur À L’HUILE DE VidangeAIR À Filtre DU Entretien Intérieur blocage de l’écrou serrez et tourner deTEN LA DE Réglage ET Vérification Seulement 645A et 643B Modèles ArrièreMarche LA DE Courroie LA DE Sion Avant Marche LADents AvantBolo Dents ArbreMission Pas ne pour niveau le fréquemment VérifiezFond Trans LA DE Engrenages Pour HuileEntretien Utilisation Motoculteur DU Déchargement ET ChargementSauf déconseillons Dents des NettoyageCorporelles blessures Risques des présenterDétrempée Terre la pulvériserTerre une travailler de Évitez Motoculteur, du contrôle de perte la Corporelles Blessures des et matériels dégâts desLes laissez et travaillant en détendu Soyez .b Profondeur en plus dents les travaillerTerre la Séparément fournie moteur duTravail Chine Faites NeRéglage Peut avertissement cet de respect non Le Matériels dégâtsDes ou corporelles blessures des entraîner Travailler à prêt soyez vous que ce jusqu’àAvant Marche LA DE D’EMBRAYAGE Barre CetteMoteur DU Commandes Roues DES D’ENTRAÎNEMENT GoupillesAssemblage Moteur’HUILE Plein Étape Septième Avant Marche LA DE Installa Étape QuatrièmeIncorrecte tension Remarque ’EMBRAYAGE Câble DU TionCaisse LA DE Culteur Moto LE Sortir Étape TroisièmeDétachées pièces des Liste RemarqueRemisage et Entretien SYMBOLE! CE Accompagne QUI L’AVERTISSEMENTResponsabilité Votre RespectezPréparation SYMBOLE! CE Accompagne QUI L’AVERTISSEMENT RespectezFonctionnement Général en UtilisationCommandes et Caractéristiques DépannageSaison hors Remisage et Entretien ’UTILISATION Notice 02/24/2006 772C0845

643B, 643C, 645A specifications

The Bolens 645A, 643C, and 643B are celebrated models in the lineup of Bolens garden tractors, known for their durability and versatility. These machines, produced during the 1970s and 1980s, are vintage favorites for homeowners and garden enthusiasts seeking rugged equipment for their gardening needs.

The Bolens 645A is especially noted for its robust build and powerful performance. Equipped with a 7-horsepower engine, the 645A can tackle a variety of tasks, from mowing to snow removal, making it a multipurpose tool in any garden or landscape. One of the main features of the 645A is its hydrostatic transmission, which allows for seamless speed adjustments, providing exceptional maneuverability in tight spaces and varied terrain.

Similarly, the Bolens 643C and 643B models boast impressive features and capabilities. The 643C is renowned for its compact yet powerful 6-horsepower engine. It includes a gear-driven transmission, which offers reliable power transfer and increased efficiency while operating under demanding conditions. The steady performance of the 643C makes it ideal for smaller properties, where precision and control are paramount.

The 643B, while slightly less powerful than its sibling, still holds its own with a solid 5-horsepower engine. It is particularly favored for its ease of use and relatively low maintenance requirements, making it a perfect choice for casual gardeners or those new to the world of garden tractors. Its straightforward controls and simple mechanisms ensure that users can quickly learn to operate it proficiently.

All three models are engineered with a focus on user comfort. The seating is designed ergonomically, allowing users to operate for extended periods without discomfort. Additionally, the accessibility for maintenance tasks is a notable characteristic, ensuring that both professional and amateur gardeners can perform regular upkeep with ease.

In terms of technology, these models utilize straightforward mechanical designs with minimal electronic components, which reduces the likelihood of breakdowns and simplifies repairs. The rugged construction of the chassis and attachments demonstrates Bolens' commitment to longevity and resilience, making these tractors a solid investment for any gardening enthusiast.

In summary, the Bolens 645A, 643C, and 643B models stand out in the garden tractor market due to their powerful engines, user-friendly designs, and robust construction. They represent a blend of efficiency and reliability, catering to a wide range of gardening tasks and maintaining a loyal following among vintage equipment enthusiasts.
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