TM 9-2320-272-24-2
3-389. PRESSURE RELIEF VALVE MAINTENANCE
THIS TASK COVERS:
b. Adjustment
a. Testing
APPLICABLE MODELS
REFERENCES (TM)
TM 9-2320-272- 10
M936/A1/A2
TM 9-2320-272-24P
TOOLS
General mechanic's tool kit (Appendix E, Item 1) EQUIPMENT CONDITION
Parking brake set (TM 9-2320-272-10).
Hydraulic pressure gauge (Appendix E,
Boom secured in travel position (TM 9-2320-272-101.
Item 51)
Remove five screws (1) and cover (2) from gondola (8).
1.
Remove valve plug (3) from valve bank (4) and install hydraulic pressure gauge.
2.
Start engine and engage crane hydraulic system (TM 9-2320-272-10).
3.
Raise engine idle to 1,250 rpm and observe hydraulic pressure gauge reading. Hydraulic pressure
4.
gauge should read 1,350 psi 25 psi (9,308 kPa 172 kPa).
If reading is within limits, go to step 7.
5.
If reading is not within limits, perform task b.
6.
Remove hydraulic pressure gauge from valve bank (4) and install plug (3).
7.
Install cover (2) on gondola (8) with five screws (1).
8.
Remove acorn nut (7) from valve bank (4).
1.
While holding adjusting screw (6), loosen jamnut (5)
2.
Turn adjusting screw (6) until hydraulic pressure gauge reads 1,350 psi 25 psi (9,308 kPa 172 kPa).
3.
While holding adjusting screw (6), tighten jamnut (5).
4.
If correct pressure cannot be achieved, notify DS maintenance.
5.
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