ENGINE AR-COMPLETE 3946487 - Caterpillar

Illustration 4 g03342154
View of the right side of the transmission
(1) Pressure tap for the clutch No. 1 modulating valve
(2) Pressure tap for the clutch No. 2 modulating valve
(3) Pressure tap for the clutch No. 3 modulating valve
(4) Pressure tap for the clutch No. 4 modulating valve
(5) Pressure tap for the clutch No. 5 modulating valve
(6) Pressure tap for the clutch No. 6 modulating valve
(7) Pressure tap for the clutch No. 7 modulating valve
(8) Pressure tap for the transmission main relief pressure
(9) Pressure tap for the torque converter inlet pressure
(10) Pressure tap for the transmission lubrication pressure (front box)
(11) Pressure tap for the transmission lubrication pressure (rear box)Use the tables above to record the transmission and torque converter pressures.Note: The main relief pressure should be checked prior to performing the calibration. If main relief pressure is too low, the calibrations would have to be rerun.The transmission oil temperature during testing must be 80° to 120°C (176° to 248°F).If the pressure reading for each energized clutch is not within the target values, the following problems may be occurring:
a bent solenoid stem
a dirty screen or a plugged screen
a weak spring or a broken spring
a problem in the electrical circuitFor additional testing and troubleshooting information refer to Testing and Adjusting, KENR8394, "Engagement Pressure for the Transmission Clutch - Calibrate" and Testing and Adjusting, KENR8394, "Fill Time for the Transmission Clutch - Calibrate".Main Relief Valve Pressure - Test
Connect tooling (A) or tooling (B) to pressure tap (8) for the main relief valve pressure. Refer to Illustration 4.
Start the engine and run the engine at low idle.
At low idle, apply the service brakes, and move the transmission control through the 1, the R, and the N positions. The main relief pressure should be 2310 172 kPa (335 25 psi) for all positions for "R1N" transmission and "JH5" transmission.If the pressure is not correct, adjust the main relief valve
Move the transmission control to the P position.
Turn off the machine and remove all test equipment.Main Relief Valve Pressure - Adjust (If Needed)
The transmission hydraulic control relief valve is located under the cover on the transmission.
Illustration 5 g03353199
Transmission hydraulic control relief valve
(12) Main relief valve
(13) Cover
(14) Adjustment screwThe pressure reading for the main relief pressure at pressure tap (8) should be within the target values. If the pressure is not, adjust the spring on the transmission hydraulic control relief valve. Use the following procedure.
Remove cover (13) on the main relief valve.
Turn adjustment screw (14) in the proper direction.Turning the adjustment screw clockwise increases pump pressure. Turning the adjustment screw counterclockwise decreases pump pressure.
Install cover (14).
Check the main relief pressure again.Transmission Shift Test
Table 6
Shift Points
Shift Engine Speed (rpm) Transmission Output Speed (rpm)
1C-1D 1362 228
1-2 1834 307
2-3 1835 414
3-4 1834 556
4-5 1834 751
5-6 1833 1009
6-7 1835 1365
7-6 1293 1293
6-5 1293 962
5-4 1293 712
4-3 1294 530
3-2 1293 392
2-1 1294 292
1D-1C 1248 209 Speed Sensor Test
Using the Advisor, verify that the transmission output speed sensors, the torque converter output speed sensor, and the rear wheel speed sensors are working properly.Manual Up-Shift
Low