GASKET 2279012 - Caterpillar

Required Tools
Illustration 1 g03823692
Tooling (B)
466-6258 Communication Adapter Gp
Table 3
Required Tools
Tool Item Qty Part
Number Description
B 1 466-6258(1) Communication Adapter Gp
B1 1 370-4617 Cable As (USB PC Communication)
B2 1 317-7485 Communication Adapter III
B3 1 457-6114 Cable As (Data Link)
(1) Cat Electronic Technician (ET) and Software CD, NETG5057 are required when using the communication adapter.Machine Preparation
Move the machine to a smooth, horizontal location that is away from operating machines and away from personnel.
Permit only one operator on the machine. Keep all other personnel away from the machine or in the sight of the operator.
Place the steering control lever in the NEUTRAL position.
Engage the parking brake.
Lower the attachments to the ground.
Stop the engine.
Turn the key to the ON position, but do not start the engine.
Verify that the implement shutoff control is in the UNLOCKED position.
Move the implement control levers and the transmission control lever through the full range of travel several times. This procedure will relieve any pressure that may be present in the implement hydraulic system and the power train system.
Loosen the filler cap on the hydraulic tank so that the pressure in the tank is released. The machine may be equipped with a breaker valve. The breaker valve will be located on top of the tank. To release the pressure in the tank, press the button on top of the breaker valve.
Tighten the filler cap on the hydraulic tank.
Make sure that the pressure in the entire hydraulic system has been released.Reference: For additional guidance with preparing the machine for testing, refer to the Testing and Adjusting manual or the Troubleshooting manual for your machine.Note: The monitoring system (if equipped) for your machine accesses many values that are useful in troubleshooting the hydraulic system. When the situation is appropriate, use the monitoring system in order to find a pressure or determine a system problem.
Illustration 2 g06265055Note: Complete Step 13 and Step 14 for both sides of the machine.
Remove bolts (1) and cover (2).
Remove sun gear (3).Note: The thread in shaft (3) is M16 X 2 - 6H.
Illustration 3 g03628496
(1) Access panel
(E1) Service tool connector
Open access panel (1).
Connect Tooling (B) to service tool connector (E1).Test Procedure
The following test assumes that the ECM is set to the following parameters:
Maximum forward ground speed is 11 km/h (6.8 mph).
Reverse ground speed is 100 percent of forward ground speed.
Start the engine. Warm the hydraulic oil to 55° 10°C (131° 18°F).
Operate the engine at LOW IDLE.
Release the parking brake.
Select the highest maximum ground speed setting.
Increase engine speed to HIGH IDLE.
While the transmission control lever is in the NEUTRAL position, push the steering control lever fully to the left.
Illustration 4 g03131518
Check the following items:
Engine speed
Drive pressure for the left pump
Drive pressure for the right pump
Speed of the left drive motor
Speed of the right drive motor
The engine speed should be 1800 50 rpm.
The drive pressure for the front pump should be 5000 2000 kPa (725 300 psi).
The drive pressure for the rear pump should be 5000 2000 kPa (725