PUMP, FUEL 0776729 - Caterpillar

Disconnect two hydraulic hoses (8). Each hose is located on the left top of each piston pump.
Add hydraulic oil to each piston pump until the ports are full.
Connect the two hydraulic hoses (8) .
Slowly loosen the hydraulic filler cap and remove the filler cap. Fill the hydraulic tank until the oil level is at the halfway point in the sight gauge.
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Open the engine access door and raise the radiator assembly. Disconnect hydraulic lines (2) and (3). Fill the hydraulic lines with hydraulic fluid and reconnect the hydraulic lines (2) and (3) .
Lower the radiator assembly and close the engine access door.
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Disconnect hydraulic line (4). Fill the hydraulic line with hydraulic fluid and reconnect the hydraulic line.
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Loosen the hose clamp (5) and disconnect hose (6). Fill the hose with hydraulic fluid and reconnect the hose.
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Install the 8T-0855 Pressure Gauge to charge pressure tap (7) with a 6V-3014 Hose .
Lower the cab.
Start the engine and run the engine at low idle.
Look at the pressure gauge. The pressure should read 2900 100 kPa (420 15 psi) within 15 seconds of start-up. If the pressure is low, stop the engine. Check the hydraulic oil level in the tank. Determine the cause for low charge oil pressure before restarting 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 Tools and Shop Products Guide" 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 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 system.Flush the Drive Lines
Raise the cab. Refer to the Operation and Maintenance Manual, "Cab Support Operation" for the proper procedure.
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Disconnect electrical connection (4) for brake solenoid (5) .
Lower the cab.
Lower the armrest and fasten the seat belt.
Start the engine and allow the machine to run for five minutes before beginning the flushing procedure.
Run the engine speed at low idle.
Disengage the parking brake in order to activate the hydrostatic system and the hydraulic system.Note: When steps 8 through 11 are performed, barely lug down the engine.
Move the pilot operated hydraulic control ( hydrostatic) to the FORWARD position. Hold the pilot operated hydraulic control (