HARNESS ASSEMBLY-CHASSIS 2453257 - Caterpillar

Table 1
Required Tools    
Part Number    Part Description    Qty    
8T-0855     Pressure Gauge     3    
6V-3014     Hose As     3    
6V-4143     Coupler     6    
6V-3989     Fitting     3    
3B-8822     Elbow     1    Check the shift pressure in order to determine if leakage is present in the transmission.
Illustration 1 g00295219
Transmission (1) Tap (first gear) (2) Tap (second gear)
Illustration 2 g00917220
The pressure taps are located behind the left rear access door. (3) Pilot pressure
Position the machine on level ground and stop the engine.
Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release".
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Install a 4000 kPa (580 psi) pressure gauge to taps (1) and (2) .
Install a 4000 kPa (580 psi) on tap (3) .
Place the parking brake in the OFF position.
Start the engine.
Run the engine at a low idle.
Lower the left console in order to release the parking brake.
Place the transmission switch in the SECOND GEAR position.
Check the pressure on the gauge at tap (1). The shift pressure should be equal to the pilot pressure (3) .
Place the transmission switch in the FIRST GEAR position.
Check the pressure on the gauge at tap (1). The pressure at tap (1) should decrease to 0 kPa (0 psi).
Check the pressure on the gauge at tap (2). The shift pressure should be equal to the pilot pressure.
Place the transmission switch in the SECOND GEAR position.
Check the pressure on the gauge at tap (2). The pressure at tap (2) should decrease to 0 kPa (0 psi).Note: If the pressure at tap (1) or (2) is not equal to the pilot pressure, check the pilot pressure setting first.