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


Linkage For Transmission Controls And Parking Brake

Usage:

Type 1: 8PB1-8PB2080; 9DB1-9DB962; Type 2: 8PB2081-Up; 9DB963-Up; 9GJ1-Up; 8PJ1-Up

NOTE: While the Type 1 and Type 2 linkages look somewhat different, the adjustment procedures are the same.

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

Torque for all 3/8 in. locknuts on rod end ball studs ... 25 ± 7 N·m (18 ± 5 lb ft)

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

(1) Assembled length of rod assembly

(Type 1) ... 481 ± 1 mm (18.94 ± .04 in)

Assembled length of rod assembly

(Type 2) ... 471 ± 1 mm (18.54 ± .04 in)

(3) Assembled length of rod assembly ... 113 ± 1 mm (4.45 ± .04 in)

(5) Assembled length of rod assembly

(Type 1) ... 252.5 ± 1.5 mm (9.94 ± .06 in)

Assembled length of rod assembly

(Type 2) ... 240 ± 1.5 mm (9.45 ± .06 in)

(6) Assembled length of rod assembly ... 367 ± 1 mm (14.45 ± .04 in)

(11) Assembled length of rod assembly:

8PB, 9DB, 9GJ ... 435 ± 1 mm (17.13 ± .04 in)

8PJ ... 387.5 ± 1.0 mm (15.25 ± .04 in)

(12) Assembled length of rod assembly:

8PB, 9DB, 9GJ ... 554 ± 1 mm (21.81 ± .04 in)

8PJ ... 504.5 ± 1.0 mm (19.86 ± .04 in)

Procedure for Adjustment of Transmission Control Linkage

1. Position shift lever (14) as shown in View A-A (centered in slot)

2. Position lever (9) at transmission valve for speed control in neutral (shown in detail C) and adjust rod (16) for free fit of bolt in lever (18).

3. Position lever (10) at transmission valve for direction control in forward (shown in detail C) and adjust rod (15) to obtain a free fit of bolt in lever (17).

Procedure for Adjustment of Parking Brake

NOTE: While the Type 1 and Type 2 linkages look somewhat different, the adjustment procedures are the same.

1. With parking brake lever (4) located as shown in the brake ON position (lever down), adjust rod (2) until end fits freely in lever (4).

2. Tighten locknut on rod (2) to a torque of ... 5 ± 0.5 N·m (4 ± .5 lb ft).

3. Adjust rod assembly (5) to the specified length. Install the adjusted rod assembly.

NOTE: Do not change the length of rod assembly (5) in further adjustments.

4. Disconnect rod assembly (8) at its upper end.

5. Pull up on lever (13) until resistance is felt. Do not stretch spring can on rod (8) if so equipped. Adjust the length of rod assembly (8) until pin fits freely through upper rod end (7). Then turn upper rod end (7) down two full turns (shorten) and install rod assembly (8).

6. To check parking brake adjustment, install a 0 to 4000 kPa (0 to 600 psi) pressure gauge on either the right or left brake pressure tap.

7. Start the engine and run it at low idle.

8. With parking brake lever (4) in the brake ON position (lever down), the pressure gauge must read less than 300 kPa (44 psi). If the pressure is not less than 300 kPa (44 psi), make rod assembly (8) shorter and check the pressure again.

9. Rotate parking brake lever (4) to the brake OFF position (lever up). The pressure gauge must read 2750 ± 150 kPa (400 ± 22 psi). If the pressure reading is low, make rod assembly (8) longer and check the pressure again.

10. After adjusting the linkage in Steps 8 and 9, attach a 0 to 4000 kPa (0 to 600 psi) gauge to the P1 pressure tap on the transmission. With the engine running at low idle, move parking brake lever from brake ON to brake OFF (full lever travel each way). The P1 pressure should read exactly the same with the parking brake ON or OFF.

11. If the P1 pressure is not the same with the parking brake ON as it is with the parking brake OFF, the parking brake valve is leaking oil and the linkage must be adjusted further using the following instructions:

A. If P1 with the parking brake OFF is less than P1 with the parking brake ON, lengthen rod assembly (8).

B. If P1 with the parking brake ON is less than P1 with the parking brake OFF, shorten rod assembly (8).

12. If linkage adjustments are made in Step 11, repeat the pressure checks in Steps 7, 8, and 9. Readjust as necessary until all pressures are met.

Caterpillar Information System:

D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission Filter Group Power Shift
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Resonator Assembly Power Shift
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission Hydraulic Controls Power Shift (8P8984, 8P3046)
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Selector And Pressure Control Valve Power Shift (8P8986, 8P3044)
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Outlet Relief Valve For Torque Converter
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission And Torque Converter Pump Group Power Shift
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Torque Converter Power Shift (1T1440, 1T1947)
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Introduction
4.236 DIESEL ENGINE FOR BACKHOE LOADERS Testing And Adjusting
4.236 DIESEL ENGINE FOR BACKHOE LOADERS Systems Operation
4.236 DIESEL ENGINE FOR BACKHOE LOADERS Alternator (7T2876) Bosch Number 0 120 489 387
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Bevel And Transfer Gear Group Power Shift
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Drive Shaft Power Shift
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission And Clutch Pump Group Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission Filter Group Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Clutch And Transmission Brake Valve Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Clutch And Transmission Brake Valve Linkage Direct Drive (6T8271 (Earlier); 8E0448 (Later))
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Clutch Control Linkage Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Clutch Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission Brake Group Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Forward-Reverse And Parking Brake Control Linkage Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission Gear Group Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Gear Shift Group Direct Drive
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.