GEAR 3S7145 - Caterpillar

Introduction
The following test is used to test the oil pressure of the transmission lubrication.Required Tools
Illustration 1 g01089423
Table 1
Required Tools
Tooling Item Part
Number Description Qty
A A1 8T-0855 Pressure Gauge 1
A2 6V-3989 Fitting 1
A3 6V-4143 Quick Connect Coupler 2
A4 177-7861 Hose As 1 Testing Procedure
Illustration 2 g01686755
(1) Lubrication relief valve pressure tap The pressure for the transmission lubrication can be measured at pressure tap (1) on the front of the transmission.
Install Tooling (A) on pressure tap (1).
Start the engine. Warm the oil until the oil reaches 47 °C (116 °F).
Operate the engine at low idle. Observe the pressure gauge. The transmission lubrication pressure must be within the values that are shown in Systems Operation, Testing and Adjusting, "Power Train Pressures".
Operate the engine at high idle. Observe the pressure gauge. The torque converter outlet pressure must be within the values that are shown in Systems Operation, Testing and Adjusting, "Power Train Pressures". Shut off the engine.