TM 5-2350-378-23&P
0015
HYDRAULIC OIL OVERHEATS - Continued
CONDITION/INDICATION
Does main hydraulic pump develop 3,950-4,050 psi (27,235-27,925 kPa)?
DECISION
YES - Go to Step (14).
NO - Stop engine; relieve hydraulic pressure. Replace main hydraulic pump (TM 5-2350-262-20).
STEP
14.
Perform main relief valve test using HDC.
WARNING
Before performing any hydraulic troubleshooting in the bowl, move ejector forward and
disable it by disconnecting ejector cylinder from hydraulic system. Failure to comply may
result in severe injury or death to personnel.
a.
Reset all HDC solenoid valves by selecting RESET VALVES button (Figure 12, Item 5) on HDC control
box.
b.
Start engine, move ejector forward.
c.
Using LINE UP or LINE DOWN button (Figure 12, Item 3), select V1 on HDC display (Figure 12, Item 2).
Close V1 on HDC display (Figure 12, Item 2) by selecting CHANGE POSITION button
(Figure 12, Item 4) on HDC control box.
d.
Have assistant hold EJECTOR CONTROL lever in BACK. Read transducer T-3 (13R) and T-4 (13L)
pressure valves individually on HDC display (Figure 12, Item 1). Check main relief valves 13R and 13L
as follows:
e.
For 13R; With SPRUNG/UNSPRUNG lever in SPRUNG position, have assistant move right-hand
SUSPENSION CONTROL lever to RAISE, while at the same time holding the EJECTOR CONTROL
lever in BACK. Read transducer T-3 hydraulic pressure on HDC display (Figure 12, Item 1). If pressure
is not within limits, adjust main relief valve 13R.
f.
For 13L; Repeat steps for main relief valve 13L (pressure transducer T-4) moving left-hand
SUSPENSION CONTROL lever to RAISE while at same time holding EJECTOR CONTROL lever in
BACK.
g.
Read transducer T-4 hydraulic pressure on HDC display (Figure 12, Item 1).
h.
Using LINE UP or LINE DOWN button (Figure 12, Item 3), select V1 on HDC display (Figure 12, Item 2).
Close V1 on HDC display (Figure 12, Item 2) by selecting CHANGE POSITION button
(Figure 12, Item 4) on HDC control box.
0015-14
03/15/2011Rel(1.8)root(tswp)wpno(T00013)
