Bolens 645A, 643B, 643C warranty Freewheel, Stopping the Tiller and Engine

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Operating Your Tiller

WARNING

Do not operate tiller on a slope too steep for safe operation. Till slowly and be sure you have good footing. Never permit tiller

b.Swing the handlebar to the left so the right wheel takes a “step” backward. Next swing the handle- bar to the right so the left wheel “steps” backward. Repeat as needed.

c.If longer distances need to be covered in reverse, shut off the engine, then place the two wheels in

FREEWHEEL.

7.To Turn the Tiller Around:

a.Practice turning the tiller in a level, open area. Be very careful to keep your feet and legs away from the tines.

b.To begin a turn, lift the handlebars until the tines are out of the ground and the engine and tines are balanced over the wheels (Fig. 4-4).

c.With tiller balanced, push sideways on handlebar to steer in direction of turn (Fig. 4-5). After turn- ing, slowly lower tines into soil to resume tilling.

Stopping the Tiller and Engine

1.To stop the wheels and tines, release the Forward Clutch Bail (all models) or the Reverse Clutch Control (Models 643B & 645A) — whichever control is in use.

2.To stop the engine, put the ignition switch and/or the throttle control lever in the “OFF” or “STOP” position.

Figure 4-4:To begine turn, lift handlebars until tines are out of ground and unit is balanced.

Figure 4-5: With tines out of ground, push handlebars sideways to turn tiller.

to freewheel down slopes. Failure to fol- low this warning could result in personal injury.

Before tilling, contact your telephone or utilities company and inquire if underground equipment or lines are used on your property. Do not till near buried electric cables, tele- phone lines, pipes or hoses.

TILLING TIPS & TECHNIQUES

This is a CRT (counter-rotating tine) tiller. As the wheels pull forward, the tines rotate backward. This creates an “uppercut” tine action which digs deeply, uprooting soil and weeds. Don’t overload the engine, but dig as deeply as possible on each pass. On later passes, the wheels may tend to spin in the soft dirt. Help them along by lifting up slightly on the handlebar (one hand, palm up, works most easily).

Avoid the temptation to push down on the handlebars in an attempt to force the tiller to dig deeper. Doing so takes the weight off the powered wheels, causing them to lose traction. Without the wheels to hold the tiller back, the tines will attempt to propel the tiller backward, towards the operator. (Sometimes, slight downward pressure on the handlebars will help get through a particularly tough section of sod or unbroken ground, but in most cases this won’t be necessary.)

When cultivating (breaking up surface soil around plants to destroy weeds, see Fig. 4-9), a just the tines to dig only 1” to 2” deep. Using shallow tilling depths helps prevent injury to plants whose roots often grow close to the surface. If needed, lift up on the handlebars slightly to prevent the tines from digging too deeply. (Cultivating on a regular basis not only eliminates weeds, it also loosens and aerates the soil for better moisture absorption and faster plant growth.) Watering the garden area a few days prior to tilling will make tilling easier, as will letting the newly worked soil set for a day or two before making a final, deep tilling pass.

Choosing Correct Wheel & Tine Speeds With experience, you will find the “just right” tilling depth and tilling speed combination that is best for your garden.

Set the engine throttle lever at a speed to give the engine adequate power and yet allow it to operate at the slowest possible speed...at least until you have achieved the maximum tilling depth you desire. Faster engine speeds may be desirable when making final passes through the seedbed or when cultivating. Selection of the correct engine speed, in relation to the tilling depth, will ensure a sufficient power level to do the job without causing the engine to labor.

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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 LThread the #10-24 hex nut Z, Fig Install Forward Clutch CableThread the screw V into the cable adjuster 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 EngineAvoid Tilling Soggy, Wet Soil Read the following recommendations before tilling on slopesTilling Up and Down Slopes Vertical Tilling 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 La page 2 pour ce qui concerne les pièces et/ou accessoires Parts List Pièces DétachéesAdressez-vous au «Service après-vente» 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 présenterTerre une travailler de Évitez DétrempéeTerre la pulvériser 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 travaillerTravail Terre laSéparément fournie moteur du Réglage ChineFaites Ne 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 Goupilles’HUILE Plein Étape Septième AssemblageMoteur 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 UtilisationSaison hors Remisage et Entretien Commandes et CaractéristiquesDépannage ’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.