TM-9-2320-272-23-3
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 3 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-3 - Page 1177 of 1469
ADJUSTMENT
1.
Loosen screw (Figure 3, Item 6) and nut (Figure 3, Item 5) from pump adjusting link (Figure 3, Item 4) and
pump bracket (Figure 3, Item 7).
2.
Loosen two screws (Figure 3, Item 1) from pump bracket (Figure 3, Item 7) and mounting bracket
(Figure
3,
Item 10).
3.
Place prybar beneath steering pump (Figure 3, Item 2) so end rests on engine (Figure 3, Item 9).
4.
Using engine (Figure 3, Item 9) for leverage, push prybar upward until drivebelts (Figure 3, Item 11)
appear
tight.
5.
Tighten screw (Figure 3, Item 6) and nut (Figure 3, Item 5).
6.
Tighten two screws (Figure 3, Item 1) 30 to 40 lb-ft (41 to 54 N·m).
NOTE
If belt tension cannot be properly adjusted, replace drivebelts.
7.
Position belt tension gauge on drivebelt (Figure 3, Item 11) between pump pulley (Figure 3, Item 3) and
accessory drive pulley (Figure 3, Item 8).
a.
New drivebelt (Figure 3, Item 11) tension should be 95 to 105 lb-ft (418 to 462 N·m).
b.
Used drivebelt (Figure 3, Item 11) tension should be 85 to 95 lb-ft (378 to 422 N·m).
11
M10319DAA
1
2
3
4
9
7
5
11
6
10
8
Figure 3.
Steering Pump Drivebelts Adjustment.
END OF TASK
TM 9-2320-272-23-3
0504
0504-4
Back to Top
