TM 5-2350-378-23&P
0019
WINCH AND RIGHT-HAND WHEEL CONTROL INOPERATIVE - Continued
STEP
2.
Perform main relief valve adjustment using HDC.
a.
Reset all HDC solenoid valves by selecting RESET VALVES button (Figure 5, Item 5) on HDC control
box.
WARNING
Do not operate ejector when personnel are in bowl. Do not work in bowl unless
ejector lock is engaged. Failure to comply may result in severe injury or death to
personnel.
Do not stand or work in bowl area unless ejector lock is engaged. Do not stand in
bowl to observe roller guide travels. Failure to comply may result in severe injury or
death to personnel.
b.
Disable ejector by manually closing ejector inhibit ball valve V23 (Figure 4, Item 1) on DCV bank.
c.
Using LINE UP or LINE DOWN button (Figure 5, Item 3), select V1 on HDC display (Figure 5, Item 2).
d.
Close V1 on HDC display (Figure 5, Item 2) by selecting CHANGE POSITION button (Figure 5, Item 4)
on HDC control box.
e.
Loosen jam nut (Figure 3, Item 2) on main relief valve 13L (Figure 3, Item 3).
f.
Have assistant start engine and simultaneously hold EJECTOR CONTROL lever in BACK while holding
left-hand SUSPENSION CONTROL lever is RAISE.
g.
While observing transducer T-4 hydraulic pressure on HDC display (Figure 5, Item 1); rotate adjusting
screw (Figure 3, Item 1) clockwise to increase hydraulic pressure, counterclockwise to decrease
hydraulic pressure until desired pressure is obtained; tighten jam nut.
1
2
3
T01706HDC
Figure 3. Main Relief Valve 13L.
h.
Stop engine; relieve hydraulic pressure.
