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EDGE AS 2390256 - Caterpillar



2390256 EDGE AS Caterpillar parts EDGE
Rating:
51
Alternative (cross code) number:
CA2390256
239-0256
2390256
Caterpillar 2390256 EDGE AS

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Problem: A large quantity of aluminum particles are found.
Probable Cause
Mechanical failure of the torque converterProblem: Black fiber is found.
Probable Cause
A worn lockup clutch in the torque converterCheck: Check inside the transmission case
Illustration 9 g00290399
(10) Transmission drain plugs Remove plugs (10) in the bottom of the transmission case. This will drain all the oil out of the transmission and the transfer gears. Measure the total amount of the oil that is removed at both plugs. Inspect the oil for foreign material.Problem: More than 76 L (20 US gal) of oil is drained.
Illustration 10 g01204793
Transmission and torque converter gear pump
(3) Transmission lubrication section
(4) Transmission charging pump section
(5) Torque converter charging pump section
(6) Transmission scavenge pump section
Illustration 11 g00290397
Lower right side of the transmission case
(8) Transmission magnetic screens inside the case Probable Cause
Failure of the transmission scavenge pump section (6)
Restriction in transmission magnetic screens (8)
Too much leakage in a transmission clutchProblem: Iron chips or steel chips are found.
Probable Cause
Broken components in the transfer gears or in the transmissionProblem: Aluminum particles are found.
Probable CauseWorn housings, worn load pistons, or worn selector pistons in the pressure control valveCheck: Check inside the torque converter sump
Illustration 12 g01204817
Torque converter sump
(11) Cover for the suction screen Drain the oil from the torque converter sump. Remove cover (11). Remove the suction screen. Clean the suction screen.Problem: Rubber particles are found.
Probable Cause
Seal failure
Hose failureProblem: Shiny steel particles are found.
Illustration 13 g01204793
Transmission and torque converter gear pump
(3) Transmission lubrication section
(4) Transmission charging pump section
(5) Torque converter charging pump section
(6) Transmission scavenge pump section
Illustration 14 g00290401
(12) Pump drive Problem: Shiny steel particles are found.
Probable Cause
A worn drive gear or a worn driven gear on torque converter charging pump section (5)
Mechanical failure of the transmission scavenge pump section (6)
There is a mechanical failure of pump drive (12). Drain the pump drive. Inspect the oil pump drive.
There is a worn flywheel or a worn starter motor pinion gear on the engine. Inspect the starter motor pinion gear and the flywheel gear.Overheated Transmission Hydraulic System
An overheating condition in the hydraulic system will probably be first detected through Vital Information Management Systems (VIMS). The temperature sensor for the torque converter is located near the torque converter screen. The temperature sensor for the transmission lubrication oil is located at the entrance of the oil into the transfer gears. Both the sensors provide input signals to the VIMS.Probable Cause
Illustration 15 g00290393
Right side of the engine
(1) Oil cooler for the torque converter and the transmission
Restriction in oil cooler (1) for the torque converter and the transmission
Illustration 16 g01204793
Transmission and torque converter gear pump
(3) Transmission lubrication section
(4) Transmission charging pump section
(5) Torque converter charging pump section
(6) Transmission scavenge pump section
Failure in any section of the oil pump for the transmission and the torque converter. Perform the checks in "Check: Check the torque converter hydraulic filter" and in "Check: Check the transmission charging hydraulic filter".
There may be a restriction in one of the hose assemblies.
The machine is operating too long in torque converter drive with an extreme load.


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