Bolens 643B, 643C, 645A Important The support brackets must be assembled to, Move Tiller OFF Crate

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Assembly

IMPORTANT: The support brackets must be assembled to the

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outside of the handle- bar assembly.

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IMPORTANT: Before starting the engine, the wheels must be placed in the WHEEL DRIVE position (pins through wheel hubs and wheel shaft). This procedure is described in Wheel Drive Pins on page 10.

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Fig. 2.2: Attach handlebar.

3.There are three height adjustment holes in the two handlebar support brackets (E and F, Fig. 2-2). Use a setting that will position the handlebars at approximately waist level when the tines are 3”-4” into the soil. Loosely attach the support brackets to the outside of the handlebar assembly (I) using two 5/16”-18 x 1-1/2” screws (G), 5/16” split lock washers

(D)and 5/16”-18 hex nuts (G). NOTE: If a support bracket will not move, loosen attaching screw (H) and nut.

4.Tighten all handlebar mounting hardware securely.

STEP 3: MOVE TILLER OFF CRATE

To roll the tiller off the shipping platform, put the wheels in freewheel, as follows:

1.Place a sturdy block under the transmission to raise one wheel about 1” off the ground.

2.Remove the Klik Pin (J, Fig. 2-3) from the wheel hub

(K) and wheel shaft (L).

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Fig. 2.3: Wheel in FREEWHEEL position (wheel drive pin through wheel shaft only).

3.Slide the wheel fully inward on the wheel shaft (N, Fig. 2-3). Reinstall the Klik pin (J) through the wheel shaft (L) only (not through the wheel hub). The wheel should now spin freely (freewheel) on the wheel shaft. Repeat with the other wheel.

4.Use the handlebar to roll the tiller to a flat area.

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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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