D4 TRACK-TYPE TRACTOR POWER SHIFT Every 2000 Service Hours Or 1 Year Caterpillar

(36)Hydraulic Control System

1. Position tractor so that hydraulic cylinders can move a complete stroke. Raise equipment.

2. Stop engine. Remove fill cap and drain plug. Allow oil to drain.

3. Lower equipment.

4. Clean and install drain plug.

5. Change filter element. See Item 27.

6. Remove filler strainer lock and strainer. Wash in clean solvent. Install strainer.

7. Fill tank until oil is visible in sight gauge (refill capacity on page 31).

8. Open tank bleed valve, start engine.

9. Close bleed valve when oil flows without air bubbles.

10. Raise equipment and move tractor to level surface.

11. Lower equipment and check oil level. Add oil as required.

(37)Brake Pedals

Lubricate 1 fitting at each pedal pivot. Total - 2 fittings. (if equipped.)

(38)Steering Clutch

Lubricate 1 fitting at each lever pivot. Total - 2 fittings.

(39)Engine Valve Lash - Check and Adjust

Check valve lash with engine stopped. Do not use starter to turn flywheel.

1. Remove rocker arm covers. Check valve lash and adjust if necessary (see page 23).

2. Remove plug from flywheel housing. Turn flywheel to close No. 1 inlet and exhaust valves and allow timing bolt to be inserted. Turn engine slowly when installing bolt. Do not use starting motor.

Check lash of No. 1 and No. 2 inlet valves. Check lash of No. 1 and No. 3 exhaust valves.

Adjust valves if necessary (see page 23).

3. Remove bolt and turn flywheel 360 ° to close No. 4 exhaust and inlet valves.

Check lash of No. 3 and No. 4 inlet valves.

Check lash of No. 2 and No. 4 exhaust valves.

Adjust valves if necessary.

Remove bolt from flywheel and install plug in flywheel housing.

4. Start engine and run at low idle. Check valve rotators. If valves do not rotate, see your AVSpare dealer.

5. Stop engine and install valve cover. Tighten bolts to 6 to 10 lb. ft. (0,83 to 1,39 mkg), in sequence shown. DO NOT overtighten.

To Adjust Valve Lash:

1. Loosen adjusting screw locknut.

2. Turn adjusting screw in to close gap, out to open gap (see page 22 for correct lash).

3. Hold adjusting screw with screwdriver and tighten locknut.

4. Recheck adjustment.

5. Remove bolt from flywheel and install plug in flywheel housing.

6. Install rocker arm cover (see above for correct bolt tightening sequence and torque).