IT38H Integrated Toolcarrier and 938H Wheel Loader Machine Systems Caterpillar

Installation Procedure

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Illustration 1	g01352022

1. Attach a suitable lifting device to piston pump (6). The weight of piston pump (6) is approximately 120 kg (265 lb). Install piston pump (6) and bolts (7).
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   Illustration 2	g01352005

2. Connect hose assembly (5).
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   Illustration 3	g01352004

3. Connect tube assembly (4). Repeat for the hose assembly (not shown) that is located below hose assembly (4). Install tube assembly (3).
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   Illustration 4	g01352003

4. Connect hose assembly (2).
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   Illustration 5	g01352001

5. Install tube assembly (1).
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   NOTICE
   To avoid system damage, make sure that the hydraulic pump is properly filled with hydraulic oil before start-up.

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   Illustration 6	g01872296

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   Illustration 7	g01872313

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   Illustration 8	g01872322

6. Use the installed lines in order to fill the cases of the fan motor, the implement/steering pump, and the brake and fan drive pump. Attach a purge line to the pressure tap in the line for the fan pump. Refer to illustration 6. Attach another purge line to the case drain line above the fan motor. Refer to illustration 7. Attach a bypass hose for the filter at the test ports for the hydraulic oil filter. One above the hydraulic service center and one inside the hydraulic service center. Refer to illustration 8.
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   Illustration 9	g01872336
   (8) Regulator (9) Ball Valve (10) Air Gauge (11) Cap

7. Fill the tank with hydraulic oil. Replace the hydraulic tank breather with 148-8410 Plug As and install the pressure cap. Refer to illustration 9. Turn on air pressure. The regulator will allow only 5 psi of air pressure. Use gauge to validate pressure. Once a steady stream of oil begins to flow out of the purge line, remove the purge line and filter bypass hose. Remove the purge line for the fan motor first. Remove the pressure cap and reinstall the breather.

8. Continue to fill the hydraulic tank to the correct level. Refer to Operation and Maintenance Manual, "Hydraulic System Oil - Change".

   Note: During initial start-up, the engine should never run higher than low idle until the hydraulic system has been cycled and the hydraulic tank oil level has been readjusted to the correct level.

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1. Install the piston pump for the brake system and the hydraulic fan. Refer to Disassembly and Assembly, "Piston Pump (Brake, Hydraulic Fan) - Install".