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SEAL-PISTON 2333780 - Caterpillar



2333780 SEAL-PISTON Caterpillar parts SEAL
Rating:
21
Alternative (cross code) number:
CA2333780
233-3780
2333780
Caterpillar 2333780 SEAL-PISTON

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Illustration 1 g00681909
(1) Upshift solenoid (2) Downshift solenoid (3) Lockup clutch solenoid
Disconnect the wiring harness from upshift solenoid (1), downshift solenoid (2), and lockup clutch solenoid (3) .
Illustration 2 g00287667
Remove the plug for the rotary selector spool from the left side of the transmission case while the engine is stopped.
Use a 9S-1721 Extension (1/4 inch square drive) and a 9U-6635 Reversible Ratchet to turn the transmission rotary selector spool. When the ratchet is fully turned in a clockwise direction, the rotary selector spool is in the NEUTRAL-1 position. The order of the detent positions is NEUTRAL-1, NEUTRAL-2, REVERSE, and FIRST speed through SIXTH speed.Note: There is approximately 30 degrees of rotation between each detent of the rotary selector spool.Procedure To Check For Leaking Solenoids
Disconnect all the electrical harness connectors from upshift solenoid (1), downshift solenoid (2), and lockup clutch solenoid (3). Start the engine and run the engine at low idle.
Engage the parking brakes and the service brakes.
Manually shift the transmission to the FIRST speed. After the manual shift is performed, move away from the machine.
Operate the engine at low idle with the transmission in the FIRST speed for five minutes.
Return the rotary selector spool to the NEUTRAL-1 position.
Properly connect the harnesses to solenoids (1), (2), and (3) .Problem: The transmission shifts into REVERSE.
Probable Cause
Downshift solenoid (2) is leaking.Problem: The transmission shifts into SECOND.
Probable Cause
Upshift solenoid (1) is leaking.Procedure To Check For Proper Clutch Engagement
Table 2
Transmission Speed     Engaged Clutches in the Transmission    
Neutral-1     3    
Neutral-2     1    
Reverse     1 and 6    
First speed     1 and 5    
Second speed     2 and 5    
Third speed     1 and 4    
Fourth speed     2 and 4    
Fifth speed     1 and 3    
Sixth speed     2 and 3    
Disconnect all the electrical harness connectors from upshift solenoid (1), downshift solenoid (2), and lockup clutch solenoid (3). Start the engine and run the engine at low idle.
Engage the parking brakes and the service brakes.
Manually shift the transmission to the desired speed. After the manual shift is performed, move away from the machine.Note: An event will be present in the Vital Information Management System (VIMS) when the upshift solenoid (1), downshift solenoid (2), or lockup clutch solenoid (3) is disconnected. This event must be acknowledged before the torque converter oil temperature is displayed.Note: On machines that are equipped with the VIMS, put the information about the torque converter oil temperature on the display of the VIMS. Regularly check the torque converter oil temperature. Do not allow the torque converter oil temperature to increase too much during this shift sequence. The system can be damaged by high oil temperature. Watch for any temperature warnings from the VIMS. If the oil temperature becomes too hot, put the transmission in NEUTRAL. The engine should then be run at approximately 1500 rpm until the temperature returns to the normal operating range.Note: In order to maintain 1300 rpm for this test, disconnect the throttle


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