| Tools Needed | ||
| Part Number | Description | Quantity |
| 3B-7282 | Pipe Nipple | 1 |
| 9U-7400 | Multitach Tool Group | 1 |
| 6V-4142 | Unvalved Nipple | 1 |
| 1U-5481 | Pressure Gauge Group | 1 |
| 1U-5482 | Pressure Adapter Group | 1 |
| 6V-6064 | Transmission Test Cover | 1 |
| FT-1775 | Transmission Test Cover | 1 |
| 8T-0855 | Pressure Gauge | 5 |
| 8T-0854 | Pressure Gauge | 6 |
| 8T-0853 | Pressure Gauge | 1 |
This test will determine the following conditions:
- The torque converter is operating correctly.
- There is oil flow through the transmission oil cooler.
Procedure
 | |
| Illustration 1 | g00635447 |
Transmission Lubrication and Torque Converter Outlet Pressure Tap. (N) Pressure tap for transmission lubrication (P) Pressure tap for torque converter outlet | |
- Install the 9U-7400 Multitach Tool Group on the engine.
- At pressure tap (P), connect a hose group to the nipple assembly. Connect a 8T-0854 Pressure Gauge to the hose.
- Start the engine and operate the engine at LOW IDLE rpm with the transmission in NEUTRAL.
- The drive wheels must not turn during a stall test. Lower the empty bowl. Dig into the ground or place the machine against a solid object that does not move.
- Make sure that air pressure is at the normal operating pressure. Depress the brake pedal and hold the brake pedal. Make sure that the parking and secondary brakes are RELEASED.
- Move the transmission control lever into the SECOND speed position.
- Slowly increase the engine rpm to MAXIMUM SETTING. The machine will attempt to move.
Note: For the specific stall speed of the converter, see the Fuel Setting and Related Information Fiche.
| NOTICE |
|---|
Do not keep the torque converter in a stall condition for long periods of time. Damage could occur in the torque converter, the engine, and the brakes. |
- The pressure on the gauge should be between 310 ± 70 kPa (45 ± 10 psi).
- When this test is complete, move the transmission control lever into NEUTRAL. Engage the parking brakes and stop the engine. Remove the test equipment.
Results
If the torque converter outlet pressure is correct, but the transmission lubrication pressure from the Systems Operation, Testing and Adjusting, "Transmission Lubrication Relief Valve Pressure - Test" is too low, the following condition exists:
- The transmission lubrication circuit has too much leakage.
If the torque converter outlet pressure is too high, and the transmission lubrication pressure from Systems Operation, Testing and Adjusting, "Transmission Lubrication Relief Valve Pressure - Test" is too low, the following condition exists:
- The oil cooler has too much restriction.
If the torque converter outlet pressure is too low, the following conditions exist:
- The torque converter inlet relief valve is open.
- The torque converter has too much leakage.
If the oil becomes too hot during normal operation, the following conditions exist:
- The temperature gauge is bad. Install a new gauge and a new sending unit.
- There is insufficient oil in the torque converter because the torque converter inlet relief valve is open.
- Too much restriction in the oil lines or in the transmission oil cooler.
- There is too much oil in the transmission scavenge pump and the torque converter.
- There is failure in the transmission scavenge pump or the torque converter.
- Flow of oil through the magnetic screen for debris
Note: Drain the oil from the transmission case. Check the screen for the transmission scavenge pump and the magnetic screen for the transmission charging pump for debris.