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Features

and

Controls

WARNING

Do not attempt to till too deeply too quickly. Gradually work down to deeper tilling depths.

Place the Depth Regulator Lever in the “travel” position before starting the engine. This position prevents the tines from touching the ground until you are ready to begin tilling.

Failure to follow this warning could result in personal injury or property damage.

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

3.Remove Klick Pin (A, Figures 3-2 and 3-3) from wheel drive shaft (B).

4.FOR WHEEL DRIVE MODE (Figure 3-2): Slide wheel outward and align holes in wheel hub (D, Figure 3-2) and wheel shaft (B). Insert Klik pin (A) through wheel hub (C) and wheel shaft (B). Repeat with the other wheel and then remove the support from beneath the transmission.

Figure 3-2: WHEEL DRIVE position.

5.FOR FREEWHEEL MODE (Figure 3-3): Slide the wheel inward and insert the Klik pin (A, Figure 3-3) only through the hole in the wheel shaft (B). Repeat for the other wheel and then remove the support from beneath the transmission.

WARNING: Before starting engine, be sure that both wheels are in WHEEL DRIVE position. See Wheels Drive Pins for instructions.

Engaging the Forward Clutch Bail or Reverse Clutch Control (if equipped) when the wheels are not in WHEEL DRIVE could allow the tines to rapidly propel the tiller forward or backward.

Failure to comply could cause loss of tiller control, property damage, or personal injury.

FORWARD CLUTCH BAIL

The Forward Clutch Bail (D, Figure 3-4) controls the engagement of forward drive to the wheels and tines.

To operate the Forward Clutch Bail:

1.Put wheels in WHEEL DRIVE position (see “WARN- ING” statement above).

2.Lift and hold the clutch bail (D, Figure 3-4) against the handlebar to start the wheels and tines rotating in a forward direction.

3.Release the clutch bail to disengage (stop) the wheels and tines (the engine will continue to run).

REVERSE CLUTCH CONTROL (Models 643B & 645A only)

The Reverse Clutch Control (E, Figure 3-4) controls the engagement of reverse drive to the wheels and tines. The reversing feature is used for maneuvering the tiller only — never engage the tines in the ground while operating in reverse.

Figure 3-3: FREEWHEEL position.

WARNING: Use extreme caution when reversing or pulling the machine towards you. Look behind to avoid obstacles.

Never attempt to till in reverse.

Failure to follow this warning could result in personal injury or property damage.

To operate the Reverse Clutch Control:

1.Put wheels in WHEEL DRIVE position (see “WARN- ING” statement at the left).

2.Stop all tiller motion by releasing the Forward Clutch Bail.

3.Lift the handlebar until the tines clear the ground, look behind you to avoid any obstacles, and then pull the control knob (E, Figure 3-4) out. The wheels and tines will rotate in a reverse direction.

Figure 3-4: All models have a Forward Clutch Bail (E). Only Model 634A have a Reverse Clutch Control (F).

4.Release the control knob to disengage (stop) the wheels and tines (the engine will continue to run).

DEPTH REGULATOR LEVER

This lever (F, Figure 3-5) controls the tilling depth of the tines. Pull the lever back and slide it up or down to engage the notched height settings.

The “travel position” (highest notch) raises the tines approximately 1-1/2” off the ground, allowing the tiller to be moved without the tines contacting the ground. This setting should also be used when starting the engine.

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Bolens 643C To operate the Forward Clutch Bail, Depth Regulator Lever, Reverse Clutch Control Models 643B & 645A only

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.