PUMP GP-GR 1 BSC 20R8503 - Caterpillar

(39)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 kerosene. 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.(40)Flywheel Clutch
Remove floor plate. Lubricate lever pivot and bellcrank. Total - 2 fittings. (If equipped.)(41)Brake Pedals
Lubricate 1 fitting at each pedal pivot. Total - 2 fittings.(42)Steering Clutch
Lubricate 1 fitting at each lever pivot. Total - 2 fittings.(43)Forward-Reverse Lever
Lubricate 1 fitting at lever pivot.(44)Engine Valve Lash - Check and Adjust
Check valve lash when engine is stopped.1. Remove rocker arm covers. Check valve lash and adjust if necessary (see page 22).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 22).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 Caterpillar 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 21 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).(45)Engine Air Intake System
Never service air cleaners with engine running.
Service filter elements when RED indicator locks in the visible position.Primary Element
1. Remove cover and primary element.2. Clean inside of body and cover.3. Clean and inspect element. (See Page 24)4. Install clean element and cover.5. Reset indicator.If indicator shows RED shortly after installation of clean primary element, and element has been cleaned 6 to 8 times, change element.If new primary element was used, and indicator shows RED, change secondary element.
Do not clean secondary element.
Secondary Element
1. Remove cover and primary element.2. Remove and clean secondary element.3. Cover air inlet opening.4. Clean entire air cleaner including precleaner if necessary.5. Uncover air inlet.6. Install new element, torque element nuts to 20 5 lb. ft. (2.8 .69 mkg).7. Install clean primary