315B Excavator Machine Systems Caterpillar

Installation Procedure

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Illustration 1	g00368711

1. Put cover (30) in the cover's original location on the main hydraulic pump. Install four bolts (29), the washers and the nuts.

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Illustration 2	g00493211

2. Use the following procedure to assemble coupling assembly (24) .

   1. Install two locating pins (27) in hub (28) .

   2. Put coupling (26) in position on the locating pins on hub (28). Install socket head bolt (25). Tighten the socket head bolt to a torque of 215 ± 10 N·m (160 ± 7 lb ft).

   3. Follow Step 2.a and Step 2.b in order to install the other three coupling assemblies.

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Illustration 3	g00368709

3. Be sure that the splined shaft of the main hydraulic pump is clean and free of dirt and debris. Apply a thin coat of 5P-0960 Molybdenum Grease on the splined shaft.

4. Install coupling assembly (24) on the splined shaft of the main hydraulic pump. Install the coupling assembly until the coupling assembly is even with the end of the shaft. Use a soft faced hammer to locate the coupling assembly on the splined shaft, if necessary. Use a straight edge to be sure that the end of the coupling assembly is even with the end of the splined shaft. Tighten two setscrews (23) to a torque of 107 ± 10 N·m (75 ± 7 lb ft).

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Illustration 4	g00368708

5. Put inserts (21) and coupling element (22) in position on the engine flywheel. Install four socket head bolts (20). Tighten the socket head bolts to a torque of 215 ± 10 N·m (160 ± 7 lb ft).

Note: The main hydraulic pump must be kept level during the installation in order to prevent binding of the pump drive coupling.

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Illustration 5	g00368707

6. Fasten lifting slings and a hoist to main hydraulic pump (17), as shown. Put the coupling assemblies in position on the engine flywheel. Make sure that the coupling assemblies are aligned with each other. Push the main hydraulic pump against the flywheel housing.

7. Install twelve bolts (18) and the washers that hold the main hydraulic pump to the engine flywheel housing.

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Illustration 6	g00493281

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Illustration 7	g00368705

8. Install two lower plates (15) through the opening in the upper frame of the machine. Install the six bolts (17), washers, and two bolts (16) .

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Illustration 8	g00368704

9. Check the condition of the O-ring seals that are used in the ends of the hose assemblies and the pipe assembly that connect to the main hydraulic pump and pilot pump. If any of the seals are damaged, use new parts for replacement.

10. Connect pipe assembly (14) to the bottom of the main hydraulic pump with four socket head bolts.

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Illustration 9	g00368703

11. Install bracket (9) and two bolts.

12. Connect two hose assemblies (13) from the pilot pump.

13. Connect four hose assemblies (10), four hose assemblies (12), and connector (11) to the main hydraulic pump.

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Illustration 10	g00368702

14. Install upper plate (7), six bolts (6) and the washers. Connect hose assembly (8) .

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Illustration 11	g00368701

15. Put support assembly (5) in position and install six bolts (4) .

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Illustration 12	g00368699

16. Put plate (2) in position above the main hydraulic pump. Install five bolts (1) and the washers.

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Illustration 13	g00368700

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NOTICE
To avoid system damage, make sure that the hydraulic motor is properly filled with hydraulic oil before start-up.

17. Install two bolts (3) on the bottom of plate (2) .

    Note: Refer to Operation and Maintenance Manual, "Lubricant Viscosities and Refill Capacities" for the proper filling procedure and the proper level for the hydraulic oil system.

    Note: Fill the main hydraulic pump with clean hydraulic oil before operation. Purge the air from the main hydraulic pump in order to prevent component damage.

18. Use the following procedure to purge the air from the main hydraulic pump.
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    Illustration 14	g00368772
    The arrow shows the plug for the air vent .

    1. Remove the plug for the air vent from the main hydraulic pump. Remove the plug before the engine is started.

    2. Add clean hydraulic oil to the pump through the opening for the plug. Install the plug for the air vent when the pump is filled with oil.

    3. Start the engine.

    4. Slowly loosen the filler cap on the hydraulic oil tank. Run the engine at low idle speed. Fully raise the boom. Hold the boom in the raised position.
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    Illustration 15	g00368773
    This is the position of the machine before purging air from the hydraulic system.

    5. Tighten the filler cap on the hydraulic oil tank. Place the stick in a vertical position. Slowly lower the boom until the bucket makes contact with the ground. Stop the engine. This will pressurize the hydraulic oil tank.

    6. Slowly loosen the plug for the air vent on the main hydraulic pump. Loosen the plug for several full turns until oil starts to flow around the plug. This indicates that air has been purged from the pump. Tighten the plug for the air vent on the main hydraulic pump.

    7. Close the access door to the main hydraulic pump.

    8. Start the engine and operate the engine at idle speed with no load for five minutes.

    9. Operate the control levers in order to allow the hydraulic oil to circulate throughout the hydraulic system. With the stick in a vertical position, lower the bucket to the ground. Stop the engine.
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    Illustration 16	g00368774

    10. Maintain the oil level between the marks on the sight gauge for the appropriate temperature range. Refer to Operation and Maintenance Manual, "Lubricant Viscosities and Refill Capacities" for more information.