TH103 Telehandler Braking System Caterpillar

Parking Brake Control Cable - Adjust

Usage:

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Personal injury or death can result from machine movement.

Place blocks in front of and behind the wheels to make sure the machine does not move while the parking brakes are disengaged.

Place wheel blocks in front of the rear wheels and behind the rear wheels. Disengage the parking brake.

Raise the front of the machine in order to adjust the parking brake. Place the jack in a location that will sustain the weight of the machine such as the axle pads. The axle pad should be parallel to the ground. The head of the jack should be against a flat surface. Use a jack which will support the weight of the machine. If the machine is equipped with stabilizers, use the stabilizers to raise the machine.

After you have jacked up the machine to the height that is required for you to perform the work that is needed, place wood blocks for cribbing at suitable locations under the machine. The wood blocks should be placed on level ground. The wood blocks should provide a large base for support. The wood blocks should be no less than 15 cm (6 inches) wide,15 cm (6 inches) high, and 76 cm (30 inches) long. You should use only wood blocks which will support the weight of your machine.

Once the wood blocks are in place, lower the jack until the machine is supported by the blocks. Make sure that the machine is stable before you proceed to work on the machine.

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Illustration 1	g00795540
View on top of front axle (1) Lever (right side) (2) Nut (3) Pin (4) Adjusting nut (5) Locknut (6) Stop bolt (7) Locknut (8) Stop bolt (9) Lever (left side)

Disconnect the cable for the parking brake control on the front axle from lever (1) by removing nut (2) and pin (3). Loosen adjusting nuts (4) .

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Illustration 2	g00795542
Location of the stop bolt for right side front brake assembly (5) Locknut (6) Stop bolt

Loosen locknut (5) on stop bolt (6) in order to adjust the right side front brake assembly.

Use a suitable screwdriver to turn stop bolt (6) clockwise. Turn stop bolt (6) in 180 degree increments. Pressure will be increased on right side lever (1). The increased pressure will apply the parking brake. Continue to turn the stop bolt until the right side front wheel assembly cannot be rotated by hand.
Note: If the parking brake cannot be fully engaged by maximum adjustment of stop bolt (6) it will be necessary to adjust the position of both lever (1) and lever (9). Release all pressure from the levers by turning stop bolts (6) and (8) fully counterclockwise. Remove lever (1) and lever (9) from the respective splined shaft. Turn each lever toward the respective stop bolt by one spline. Install lever (1) and lever (9) onto the respective splined shaft. Continue with the adjusting procedure by repeating Step 10.

When the right side wheel is locked, turn stop bolt (6) counterclockwise by two full turns until the brake is released. You should now be able to rotate the right side front wheel assembly by your hand.

Loosen locknut (7) on stop bolt (8) in order to adjust the left side front brake assembly.

Use a suitable screwdriver to turn stop bolt (8) clockwise. Turn stop bolt (8) in 180 degree increments. Pressure will be increased on lever (9). The increased pressure will apply the parking brake. Continue to turn the stop bolt until the left side front wheel assembly cannot be rotated by hand.

Turn stop bolt (8) counterclockwise by two full turns until the brake is released and the left side front wheel assembly can be rotated by hand.

Install the cable for the parking brake control onto lever (1). Install pin (3) and nut (2) .

Adjusting nuts (4) on lever (9) should be used in order to reduce the slack in the cable. Stop adjustment when both lever (9) and lever (1) moves off stop bolts (6) and (8) .
Note: If the required adjustment cannot be obtained with adjusting nuts (4) it may be necessary to adjust lever (1) and lever (9). Release all pressure from the lever assemblies by turning stop bolts (6) and (8) fully counterclockwise. Remove lever (1) and lever (9) from the respective splined shaft. Turn each lever inward by one spline. Install lever (1) and lever (9) onto the respective splined shaft. Repeat the adjusting procedure beginning at Step 8.

Use the jack to raise the machine. Remove the wood blocks and lower the machine to the ground.

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Check the operation of the parking brake. If it is necessary you can take up any slack in the cable by using the adjusting knob (10) on the hand lever.

Place the hand lever for the parking brake in the DISENGAGED position. Loosen socket setscrew (11) that is located in the hand lever. Turn adjusting knob (10) on the hand lever clockwise in increments of two turns in order to increase the brake force. Turn the adjusting knob on the hand lever counterclockwise in order to decrease the brake force.