2

Assembly

WARNING

Read, understand, and follow all instructions and warnings posted on the machine and in this manual before operating.

STEP 6: CHECK TRANSMISSION OIL LEVEL

The transmission was filled with gear oil at the factory. However, you should check the gear oil level at this time to make certain it is correct.

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

1.With the tiller on level ground, pull the Depth Regula- tor Lever (FF, Fig. 2-10) back and then all the way up until the lowest notch in the lever is engaged.

2.Remove the oil fill plug (GG, Fig. 2-11) from the transmission housing cover and locate the main drive shaft situated inside the housing.

3.The gear oil level is correct if the gear oil is approxi- mately halfway up the side of the main drive shaft.

4.If the oil level is low, add gear oil by referring to A. To Check the Transmission Gear Oil Level in Section 5.

STEP 7: ADD MOTOR OIL

The tiller is shipped without oil in the engine.

IMPORTANT: Do not start the engine without first adding motor oil. Severe engine damage will result if the engine is run without oil.

1.Refer to the separate Engine Owner’s Manual for engine oil specifications and capacities.

2.With the tiller on level ground, move the Depth Regulator Lever (FF, Fig. 2-10) up or down until the engine is level.

3.Add motor oil as described in the Engine Owner’s Manual.

4.Move the Depth Regulator Lever all the way down until the highest notch is engaged. This places the tines in the “travel” position, which allows the tiller to be moved without the tines touching the ground.

STEP 8: CHECK HARDWARE

Check all nuts and screws for tightness.

STEP 9: CHECK AIR PRESSURE IN TIRES (units with pneumatic tires)

Check the air pressure with a tire gauge. Deflate or inflate the tires equally to between 15 PSI and 20 PSI (pounds per square inch). Be sure that both tires are inflated equally or the unit will pull to one side.

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Fig. 2-8: Install reverse cable bracket and reverse clutch cable.

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Fig. 2-9: Route reverse clutch cable (CC) as shown. Attach with cable tie (EE).

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Fig. 2.10: Adjust Depth Regulator Lever.

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Fig. 2.11: Remove gear oil fill plug.

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Bolens 645A, 643B Check Transmission OIL Level, ADD Motor OIL, Check Hardware, Check all nuts and screws for tightness

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.