TM-9-2320-272-23-4
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 4 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-4 - Page 981 of 1393
TESTING
1.
Remove five screws (Figure 1, Item 1) and cover (Figure 1, Item 2) from gondola (Figure 1, Item 6).
2.
Remove valve plug (Figure 1, Item 3) from valve bank (Figure 1, Item 5) and install hydraulic pressure gauge
(Figure 1, Item 4).
3.
Start engine and engage crane hydraulic system (TM 9-2320-272-10).
4.
Raise engine idle to 1,250 rpm and observe hydraulic pressure gauge reading. Hydraulic pressure gauge
should read 1,350 psi ± 25 psi (9,308 kPa ± 172 kPa).
5.
If reading is within limits, go to Step (7).
6.
If reading is not within limits, perform Adjustment.
7.
Remove hydraulic pressure gauge (Figure 1, Item 4) from valve bank (Figure 1, Item 5) and install plug
(Figure
1, Item 3).
8.
Install cover (Figure 1, Item 2) on gondola (Figure 1, Item 6) with five screws (Figure 1, Item 1).
M10008DAA
5
4
3
2
6
1
Figure 1.
Pressure Relief Valve Testing.
END OF TASK
TM 9-2320-272-23-4
0705
0705-2
Back to Top
