ENGINE AR-CORE 4789826 - Caterpillar

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Transmission Lines (Side View) (16) Scavenge section of transmission oil pump (43) Transmission oil cooler (N) Pressure tap for transmission lubrication (P) Pressure tap for torque converter
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Pressure Control Valve (A) Pressure tap for No. 1 clutch (B) Pressure tap for No. 2 clutch (C) Pressure tap for No. 7 clutch (D) This pressure tap is not used. (E) Pressure tap for No. 5 clutch (F) Pressure tap for No. 4 clutch (G) Pressure tap for No. 6 clutch (H) Pressure tap for No. 3 clutch (M) Pressure tap for pilot oil
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Left Side of Transmission (L) Pressure tap for transmission pump
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Left Side of Transmission (N) Pressure tap for transmission lubrication (P) Pressure tap for torque converter outlet pressure
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Bottom Rear of Transfer Case (17) Scavenge screen (29) Magnetic screen
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Left Side of Transmission (1) Downshift solenoid (2) Upshift solenoid
Table 1
Speed     Engaged Clutches    
NEUTRAL     4    
REVERSE     1 and 7    
FIRST Speed     1 and 6    
SECOND Speed     1 and 5    
THIRDSpeed     3 and 6    
FOURTH Speed     2 and 6    
FIFTH Speed     3 and 5    
SIXTH Speed     2 and 5    
SEVENTH Speed     3 and 4    
EIGHTHSpeed     2 and 4    Hydraulic System Tests
Note: Before you begin any of the procedures in the Testing and Adjusting section, refer to Systems Operation, Testing and Adjusting, "Machine Preparation For Troubleshooting".For a complete test of the transmission hydraulic system, refer to Systems Operation, Testing and Adjusting. Perform the following tests in the order that is provided.
Transmission Oil Pump Pressure
Retarder Operation
Transmission Lubrication Relief Valve Pressure
Relief Valve Pressure For The Torque Converter Outlet
Transmission Hydraulic Control Pilot Pressure
Maximum Clutch Pressure For The Transmission Hydraulic Control
Transmission Hydraulic Control Primary Clutch PressureTest Equipment
Note: Use the following equipment in order to perform the tests that are mentioned above.
Table 2
Tools Needed    
Part Number     Description     Quantity    
3B-6552     Elbow     1    
6V-4142     Fitting     1    
3B-7282     Pipe Nipple     1    
9U-6635     Ratchet     1    
9S-1721     Socket Extension     1    
9U-7400     Multitach Tool Group     1    
6V-6064     Transmission Test Cover     1    
1U-5481     Pressure Gauge Group     1    
1U-5482     Pressure Adapter Group     1    
8T-0853     Pressure Gauge     1    
8T-0854     Pressure Gauge     6    
8T-0855     Pressure Gauge     5