Twin Disc TA-90-8501, Operator'S Manual

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Twin Disc, Incorporated
Troubleshooting
Power Transmission System Operator’s Manual #1020510
Range Engagement Test
This verifies that the transmission is shifting properly. Keep the engine at low
idle, and the pressure gages still connected.
Table 10. Shift Test Results
Selected
Range
Test Port Pressure
PSI
Comments
Test 9 2
6 ________ Transmission should engage in 8
th
range.
Downshift
N to R
4
5
2 ________ Transmission should engage warm-up
mode. Record converter stall RPM:
Upshift
N to 1
1
4 ________ Transmission should engage in 1st range.
Upshift
1 to 2
2
4 ________ Transmission should engage in 2nd range.
Upshift
2 to 3
3
4 ________ Transmission should engage in 3rd range.
Upshift
3 to 4
1
5 ________ Transmission should engage in 4th range.
Upshift
4 to 5
2
5 ________ Transmission should engage in 5th range.
Upshift
5 to 6
3
5 ________ Transmission should engage in 6th range.
Upshift
6 to 7
1
6 ________ Transmission should engage in 7th range.
Upshift
7 to 8
2
6 ________ Transmission should engage in 8
th
range.
Final Operation Test
Operate the oil well fracturing rig transmission system, verifying proper operation
in all ranges and lockup. Look for leaks. Recheck oil level.