PLATE-WEAR 1289622 - Caterpillar

Remove the plug (6) for the pump case drain. Add hydraulic oil to the piston pump until the port is full. Install the plug, but leave the plug loose. This will allow any air that is in the pump to escape when the engine is cranked.
Add oil to the hydraulic tank if the level is not in the middle of the sight gauge.
Illustration 5 g01366442
Loosen two hose clamps (4) and disconnect hose (5). Fill the hose with hydraulic fluid and reconnect the hose. Tighten the two hose clamps.
Illustration 6 g01063514
Install the 8T-0855 Pressure Gauge to the charge pressure tap (2) with a 177-7861 Hose .
Lower the cab.
Sit in the operator's seat. Fasten the seat belt. Lower the armrest.
Crank the engine until oil begins to appear at the case drain. This indicates that the piston pump is filled.
Tighten the plug for the pump case drain.
Start the engine and run the engine at LOW IDLE.
Look at the pressure gauge. The pressure should be 3200 200 kPa (464 29 psi) within 15 seconds after start-up. If the pressure is low, stop the engine immediately. Check the hydraulic oil level in the tank. Determine the cause for low charge oil pressure before you restart the engine.Note: If charge pressure is not reached within 15 seconds, damage to the hydrostatic system will occur. Do not allow the hydrostatic system to operate with incorrect charge system pressures.Flushing The Hydrostatic System
Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Flushing of the entire hydrostatic system should be performed after a failure of a component or the replacement of a component.Note: If the oil becomes contaminated, premature component failure could result. Contaminated oil can also contribute to overheating. Use the following procedure to flush the oil in the hydrostatic system.Flush the Lines for the Drive and the Lines for the Work Tool
Follow the filling procedure and ensure that the system is properly filled with oil. Refer to "Filling the Hydrostatic System". Also ensure that the hydraulic tank is filled properly.
Raise the cab. Refer to the Operation and Maintenance Manual, "Cab Support Operation" for the proper procedure.
Illustration 7 g01063522
Disconnect electrical connection (6) for the brake solenoid (7) .
Illustration 8 g01063514
Install the 8T-0855 Pressure Gauge to the charge pressure tap (2) with a 177-7861 Hose .
Lower the cab.
Sit in the operator's seat. Fasten the seat belt. Lower the armrest.
Start the engine. The charge pressure should be 3200 200 kPa (464 29 psi) within 15 seconds after you start the engine. Refer to Testing and Adjusting, "Hydrostatic System