D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Caterpillar


Linkage For Steering Clutch And Brake And Foot Brake Controls

Usage:

------ WARNING! ------

Steering clutch and brake control linkage adjustments should be made only with the engine OFF. Accidental disengagement of the parking brake while the engine is running could cause sudden machine movement and personal injury.

--------WARNING!------

Torque for all 3/8" locknuts (jam nuts) that hold rod ends in place on the rod ... 14 ± 4 N·m (10 ± 3 lb ft)

NOTE: All rod assembly measurements must be made in a straight line between the centerlines of the rod end mounting holes.

(6) Assembled length of rod assembly ... 266.0 ± 1.5 mm (10.47 ± .06 in)

(9) Assembled length of rod assembly ... 441 ± 1.0 mm (17.36 ± .04 in)

(14) Torque for four bolts ... 47 ± 4 N·m (35 ± 3 lb ft)

Procedure for Adjustment of Steering Clutch and Brake Linkage

1. Install rod assembly (6) after it has been adjusted to correct length.

2. Make adjustments to rod assemblies (10) and (11) so there is a clearance between clutch levers (1) and (2) and platform opening, shown in view A-A of ... 7.0 ± 1.0 mm (.28 ± .04 in)

3. Adjust bumpers (4) to give a clearance between bumpers and levers of ... 1.0 + 1.0 -0.5 mm (.04 + .04 -.02 in).

Procedure for Adjustment of Brake Pedal Linkage

1. Assemble brake pedal (5) on shaft so that front edge of pedal tread plate is dimension (B) of 146 mm (5.75 in) from the floor plate. This will be one spline tooth down from position where timing mark on shaft is aligned with centerline of slot in pedal.

2. Install rod assembly (9) after it has been adjusted to correct length.

3. Disconnect rod assembly (13) from lever (12).

4. Rotate lever (12) counterclockwise (toward the front of the tractor) until resistance is felt.

5. Adjust the length of rod assembly (13) to obtain a free fit in lever (12).

6. Push the brake pedal down until lever (12) stops.

7. With the brake pedal fully pushed down, adjust bolt (7) until the head contacts the brake pedal.

8. Release the brake pedal, and turn bolt (7) an additional 1/2 turn out. Tighten locknut (8).

NOTE: To bring pedal closer to operator, align timing mark on shaft with centerline of slot in pedal. This will give dimension (B) of 176 mm (6.9 in)

Caterpillar Information System:

D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Steering Clutch And Brake Control Valve
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D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Clutch And Transmission Brake Valve Linkage Direct Drive (6T8271 (Earlier); 8E0448 (Later))
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