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TM 5-2410-237-23
WINCH ASSEMBLY PRESSURE TESTS - CONTINUED
0190 01
INTERPRETING TEST RESULTS
Table 2. Interpreting Test Results.
PROBLEM NO.
PROBABLE CAUSE
1.
No oil pressure at pressure
1.
Very low oil level or no oil in winch.
taps (1, 2 and 3).
2.
Failure of oil pump or oil drive.
3.
Failure of an oil line.
2.
Oil pressure at pressure tap
1.
Lubrication valve in filter base will not open or will not open completely.
(3) is too high.
2.
Oil flow through filter element is stopped.
3.
Oil pressure at pressure tap
1.
Low oil flow (refer to Problem No. 1).
(3) is too low.
2.
Failure of lubrication valve spring in filter base.
3.
Oil leakage in clutch and/or lubrication circuits.
a. If leak is in lubrication circuit, oil pressure at pressure taps (1 and 2)
will be normal.
b. If leak is in input clutch circuit, oil pressure at pressure taps (1 and 2)
will be low.
c. If leak is in directional clutch circuit, oil pressure at pressure tap (2)
will be low.
4.
Oil pressure at pressure tap
1.
Internal damage to winch control valve.
(1) is zero (0).
2.
No pressure in directional clutch (refer to Problem No. 7).
5.
Oil pressure at pressure tap
1.
Internal damage to winch control valve.
(1) is too high.
2.
Incorrect springs installed in winch control valve.
6.
Oil pressure at pressure tap
1.
Internal damage to winch control valve.
(1) is too low.
2.
Oil leak in circuit of input clutch.
7.
Oil pressure at pressure tap
1.
Failure of winch control cable or linkage.
(2) is zero (0).
2.
Internal damage to winch control valve.
8.
Oil pressure at pressure tap
1.
Incorrect spring installed in winch control valve.
(2) is too high.
2.
Internal damage to winch control valve.
9.
Oil pressure at pressure tap
1.
Internal damage to winch control valve.
(2) is too low.
2.
Oil leak in circuit of directional clutch.
10. Oil pressure at pressure taps
Low oil level is causing pump cavitation.
(1, 2 and 3) goes up and
down.
11. Hose failure caused by high
Internal damage to winch control valve.
oil pressure.
END OF WORK PACKAGE
0190 01-5
Change 1

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