TM 5-2350-377-13&P
0016
HYDRAULIC INSTALLATION - Continued
STEP
1.
Perform spool valve checks.
a.
To test spool valve, fold and unfold blade in SPRUNG mode.
b.
Have assistant start engine.
c.
Have blade in folded position; to unfold blade, lift manual override spool valve Z4 (Figure 1, Item 1).
d.
Have blade in unfolded position; to fold blade, depress manual override spool valve Z4
(Figure 1, Item 1).
e.
Stop engine; relieve hydraulic pressure.
1
2
4
3
T00801HBF
Figure 1.
Test Spool Valve.
CONDITION/INDICATION
Does blade fold or unfold?
DECISION
YES - Go to Track (Left or Right) Will Not Tighten or Loosen, HBF-TT (Electrical) (WP 0012).
NO - Go to Step (2).