CLIP 8W8482 - Caterpillar

Pump Break-In For Hydraulic Excavators And Wheel Loaders
1. After installing the pump on the machine, fill the pump housing with oil through the case drain port.2. Loosen the discharge line on the pump and the fill cap on the hydraulic tank. (Be sure the oil level is correct.)3. With the throttle in the OFF position, prime the pump by turning the engine with the starter until oil seeps from the discharge connection at the pump.4. Tighten the discharge line and fill cap. (Once again, be sure the oil level is correct.)5. Start the engine and let it run at low idle. Operate the hydraulic circuits until the system reaches operating temperature (about 15 minutes).
Do not operate the hydraulic system at relief pressures before the system reaches operating temperature.
6. Increase engine speed to approximately 1500 rpm. Operate the hydraulic circuits at relief pressures for a maximum of 8 seconds, wait a minimum of 30 seconds and repeat. Repeat this procedure 8 to 10 times.7. Increase engine speed to high idle and repeat the 8 seconds "on," 30 seconds "off" operation just described.
Do not allow hydraulic oil temperature to rise above 80°C (180°F) at any time during the break-in procedure.
8. Return controls to their HOLD position and run the engine at high idle for a minimum of 5 minutes.Pump Break-In For Motor Graders
1. After installing the pump on the machine, fill the pump housing with oil through the case drain port.2. Loosen the discharge line and the fill cap on the hydraulic tank. (Be sure the oil level is correct.)3. With the throttle in the OFF position, prime the pump by turning the engine with the starter until oil seeps from the discharge connection at the pump.4. Tighten the discharge line and fill cap. (Once again, be sure the oil level is correct.)5. Disengage the unloader valve and start the engine. Run at low idle until the oil system temperature is about 52°C (125°F).6. With the engine still at low idle, carefully release the unloader valve and operate the blade up and down. Take care not to reach the end of the cylinder travel. Do this for about 10 minutes.7. Increase engine speed to approximately 1500 rpm and operate the circle drive back and forth for approximately 15 minutes.8. On 130G, 140G, 12G, 14G and 16G Motor Graders, check pumps for staging. Pumps should downstage to the standby pressure of 14 800 kPa (2150 psi) from the second stage pressure of 24 100 kPa (3500 psi) in 5 to 10 seconds. Failure of the pump to stage correctly could be the result of a leaking ball check in the main control valve, excessive case drainage, a faulty servo or pressure reducing valve, a leaking/sticking shuttle valve, an improperly adjusted main relief, or leakage at the unloader valve.Break-In Procedure For Hydrostatic Transmissions
1. After installing the unit on the machine, prime the pumps by filling the transmission case to the FULL mark on 963 and 973 Loaders and to 220 mm (8.7")