Bolens 643B, 643C, 645A warranty Read the following recommendations before tilling on slopes

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Let the Tiller Do the Work

Avoid Making Footprints

Avoid Tilling Soggy, Wet Soil

While tilling, relax and let the wheels pull the tiller along while the tines do the digging. Walk on the side that is not yet finished (to avoid making footprints in the freshly tilled soil) and lightly, but securely grip the handlebar with just one hand.

Whenever possible, walk on the untilled side of the unit to avoid making foot- prints in your freshly tilled or cultivated soil. Footprints cause soil compaction that can hamper root penetration and contribute to soil erosion. They can also “plant” unwanted weed seeds back into the freshly tilled ground.

Tilling wet soil often results in large, hard clumps of soil that can interfere with planting. If time permits, wait a day or two after heavy rains to allow the soil to dry before tilling. Test soil by squeez- ing it into a ball. If it compresses too easily, it is too wet to till.

Preparing Seedbeds

When preparing a seedbed, go over the same path twice in the first row, then overlap one-half the tiller width on the rest of the passes (see Fig. 4-6). When finished in one direction, make a second pass at a right angle, as shown in Fig. 4-7. Overlap each pass for best results (in very hard ground, it may take three or four passes to thoroughly pulverize the soil.)

If the garden size will not permit lengthwise and then crosswise tilling, then overlap the first passes by one-half a tiller width, followed by successive passes at one-quarter width (see Fig. 4-8).

Cultivating

With planning, you can allow enough room between rows to cultivate (see Fig. 4-9). Leave room for the hood width, plus enough extra room for future plant growth.

Tilling On Slopes

Read the following recommendations before tilling on slopes:

If you must garden on a moderate slope, please follow two very important guidelines:

1.Till only on moderate slopes, never on steep ground where footing is difficult (review safety rules in Section 1: Safety of this manual).

2.We recommend tilling up and down slopes rather than terracing. Tilling vertically on a slope allows maximum planting area and also leaves room for cultivating.

IMPORTANT: When tilling on slopes, be sure the correct oil level is maintained in the engine (check every one-half hour of operation). The incline of the slope will cause the oil to slant away from its normal level and this can starve engine parts of required lubrication. Keep the motor oil level at the full point at all times!

Tilling Up and Down Slopes (Vertical Tilling)

To keep soil erosion to a minimum, be sure to add enough organic matter to the soil so that it has good moisture-holding texture and try to avoid leaving footprints or wheel marks.

When tilling vertically, try to make the first pass uphill as the tiller digs more deeply going uphill than it does downhill. In soft soil or weeds, you may have to lift the handlebars slightly while going uphill. When going downhill, overlap the first pass by about one-half the width of the tiller

Fig. 4-6

Fig. 4-7

 

 

 

Fig. 4-8

Fig. 4-9

Clearing the Tines

The tines have a self-clearing action which eliminates most tangling of debris in the tines. However, occasion- ally dry grass, stringy stalks or tough vines may become tangled. Follow these procedures to help avoid tangling and to clean the tines, if necessary.

To reduce tangling, set the depth regulator deep enough to get maximum “chopping” action as the tines chop the material against the ground. Also, try to till under crop residues or cover crops while they are green, moist and tender.

While tilling, try swaying the handlebars from side to side (about 6” to 12”). This “fishtailing” action often clears the tines of debris.

If tangling occurs, lift the tines out of the soil and run the tiller in reverse (if unit is equipped with powered reverse) for a few feet. This reversing action should unwind a good deal of debris.

It may be necessary to remove the debris by hand (a pocket knife will help you to cut away the material). Be sure to stop the engine and disconnect the spark plug wire before clearing the tines by hand.

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Operating Your Tiller

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

Loading and unloading the tiller into a vehicle is potentially hazard- ous and we don’t recommend doing so unless absolutely nec- essary, as this could result in personal injury or property damage. However, if you must load or unload the tiller, follow the guidelines given .

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Contents 02/24/2006 772C0845Table of Contents Heed ITS Warning TrainingPreparation OperationNever pick up or carry machine while the engine is running Maintenance & StorageIntroduction AssemblyAssembly Steps Loose Parts ListWheel shaft L Outside of the handle- bar assemblyImportant The support brackets must be assembled to Move Tiller OFF CrateInstall Forward Clutch Cable Thread the screw V into the cable adjusterThread the #10-24 hex nut Z, Fig Check all nuts and screws for tightness Check Transmission OIL LevelADD Motor OIL Check HardwareEngine Controls Features ControlsWheel Drive Pins IntroductionReverse Clutch Control Models 643B & 645A only Forward Clutch BailTo operate the Forward Clutch Bail Depth Regulator LeverTo adjust the handlebars Handlebar Height AdjustmentStarting and Stopping Pre-Start ChecklistFeatures and Controls Introduction BREAK-IN OperationReduces traction Release all controls on the tillerStopping the Engine and Tiller Operating the TillerStopping the Tiller and Engine FreewheelRead the following recommendations before tilling on slopes Tilling Up and Down Slopes Vertical TillingAvoid Tilling Soggy, Wet Soil Loading and Unloading the Tiller Terrace GardeningCheck Hardware Maintenance Schedule ProcedureTiller Lubrication Check for OIL LeaksBolo Tines Transmission Gear OIL ServiceYou have good footing. Never permit tiller Removing/Installing a Tine AssemblyTo Check Reverse Belt Tension Replacement Belt InformationOnly Drive Belt Tension Models 643B & 645ATo Check the Engine Oil Level Engine Cleaning AIR Cleaner Service Engine OIL ServiceSpark Plug Service OFF-SEASON StorageTrouble 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 Juridictions les selon GarantieDépannage Moteur à l’huile changer Pour .B Bougie LA DE EntretienTeur -CARBURATEUR/RÉGULA DU Réglages Lles -ÉTINCE-PARE L’ÉCRAN DE EntretienIntérieur blocage de l’écrou serrez et tourner de Moteur À L’HUILE DE VidangeAIR À Filtre DU Entretien Moteur DU NettoyageAvant Marche LA Seulement 645A et 643B Modèles ArrièreMarche LA DE Courroie LA DE Sion TEN LA DE Réglage ET VérificationArbre AvantBolo Dents DentsTrans LA DE Engrenages Pour Huile Pas ne pour niveau le fréquemment VérifiezFond MissionEntretien Motoculteur DU Déchargement ET Chargement UtilisationRisques des présenter Dents des NettoyageCorporelles blessures Sauf déconseillonsDétrempée Terre la pulvériserTerre une travailler de Évitez Profondeur en plus dents les travailler Corporelles Blessures des et matériels dégâts desLes laissez et travaillant en détendu Soyez .b Motoculteur, du contrôle de perte laTerre la Séparément fournie moteur duTravail Chine Faites NeRéglage Travailler à prêt soyez vous que ce jusqu’à Matériels dégâtsDes ou corporelles blessures des entraîner Peut avertissement cet de respect non LeCette Avant Marche LA DE D’EMBRAYAGE BarreRoues DES D’ENTRAÎNEMENT Goupilles Moteur DU CommandesAssemblage Moteur’HUILE Plein Étape Septième ’EMBRAYAGE Câble DU Tion Installa Étape QuatrièmeIncorrecte tension Remarque Avant Marche LA DEMoto LE Sortir Étape Troisième Caisse LA DE CulteurRemarque Détachées pièces des ListeRespectez SYMBOLE! CE Accompagne QUI L’AVERTISSEMENTResponsabilité Votre Remisage et EntretienGénéral en Utilisation SYMBOLE! CE Accompagne QUI L’AVERTISSEMENT RespectezFonctionnement PréparationCommandes et Caractéristiques DépannageSaison hors Remisage et Entretien 02/24/2006 772C0845 ’UTILISATION Notice

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.