ALTERNATOR GP-CHARGING 3715017 - Caterpillar

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The oil drain valve is located under the hydraulic tank.
Remove the hydraulic tank access cover that is located under the upper structure. This will allow access to the drain valve.
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Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on Containing Fluid Spillage.
Remove the oil drain valve plug.
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Install a swivel hose with clear plastic tubing in order to open the drain valve. Drain the oil into a suitable container.
Remove the swivel hose in order to close the drain valve.
Inspect the O-ring. Replace the O-ring if wear or damage is evident.
Clean the drain plug. Install the drain plug.
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Open the access door that is located on the right side of the machine.
Clean the pump, the hydraulic lines and the hydraulic tank.
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(4) Bolts (5) Washers (6) Cover (7) Spring (8) Screen
Remove bolts (4) , washers (5) , and cover (6) .Note: Dispose of used filters and used fluids according to local regulations.Note: Do not allow spring (7) to fall into the tank.
Remove spring (7) and screen (8) .Note: Refer to Operation and Maintenance, "General Hazard Information" for information on containing fluid spillage.
Wash the screen in a clean nonflammable solvent. Allow the screen to dry. Inspect the screen. Replace the screen, if the screen is damaged.
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(9) O-ring seal (10) O-ring seal
Remove O-ring seals (9) from the old screen.
Inspect O-ring seals (9) and (10) . Replace the O-ring seals if wear or damage is evident.
Install O-ring seal (9) on screen (8) .
Install screen (8) and spring (7) . Then install cover (6) , washers (5) , and bolts (4) .Note: Make sure that the O-ring seals and the spring are properly positioned during installation.
Fill the hydraulic system oil tank. Refer to Operation and Maintenance Manual, "Capacities (Refill)".
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Inspect the pressure cap. Clean the pressure cap. Replace the pressure cap if damage is evident.
Install the pressure cap.
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Note: Make no attempt to start the engine until the pump has been filled with hydraulic oil. Serious damage to the hydraulic components can result.
When the hydraulic oil has been replaced, the air must be removed from the hydraulic oil system. Use the following procedure to remove the air from the hydraulic oil system.
Stop the engine.
Slowly loosen the pressure cap on the top of the hydraulic tank.
Slowly loosen the vent plug on the top of the hydraulic pump.
Leave the plug loose until hydraulic oil starts to flows out of the plug. This indicates that the air has been released from the hydraulic system.
Install the vent plug to a torque of 19 to 23 N m (14 to 17 lb ft).
If necessary, add hydraulic oil through the opening for the pressure cap.
Tighten the pressure cap securely.
Install the access cover that is located on the right side of the machine.
Install the hydraulic tank access cover that is located under the upper structure.
Install the access cover that is located on the top of the hydraulic tank.
Start the engine. Operate the engine at idling speed for five minutes.
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Operate the joysticks in order