TM 5-3810-305-23
0146
OTHER MAINTENANCE
1.
Connect battery cables (WP 0076).
2.
Install deck plates plate (WP 0122).
3.
Check hydraulic oil level. Fill to proper level. If necessary refer to (TM 5-3810-305-10).
END OF TASK
ADJUSTMENT
1.
Remove acorn nut (Figure 3, Item 3) from relief valve located on middle inlet of main control valve
(Figure 3, Item 1).
2.
Remove dust cap and install a 0 to 4,000 psi (0 to 27,580 kPa) gage onto test port (Figure 3, Item 2)
at end of main control valve (Figure 3, Item 1).
3.
Run engine at full rpm so pump will develop required flow.
4.
Operate boom retract spool control valve to its extreme position long enough to get a pressure reading
on gage.
NOTE
Main control valve should be set at 2,750 +/- 50 psi (18,961 +/- 345 kPa) at full flow.
5.
Hold adjusting screw (Figure 3, Item 5) and loosen jam nut (Figure 3, Item 4). Turn adjusting screw clockwise
to increase pressure or counterclockwise to decrease pressure, until desired pressure setting is obtained.
6.
Hold adjusting screw (Figure 3, Item 5) and tighten jam nut (Figure 3, Item 4).
7.
Install and tighten acorn nut (Figure 3, Item 3).
8.
Remove pressure gage from test port (Figure 3, Item 2) and install dust cap.
0146-4
03/15/2011Rel(1.8)root(maintwp)wpno(M00163)
