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7–10. PRIMARY HYDRAULIC SYSTEM – MAINTENANCE OPERATIONAL CHECK (cont) | Up
TM-1-1520-238-T-5 Army Model AH-64 Helicopter (NSN
1520-01-106-9519) (EIC: RHA) Manual | Next
Figure 7–26. Primary Hydraulic Manifold |
TM 1-1520-238-T-5
7–58
7–10.
PRIMARY HYDRAULIC SYSTEM – MAINTENANCE OPERATIONAL CHECK (cont)
7–10
M68-009
PRI HYD PSI
INDICATOR
OIL LOW PRI HYD
INDICATOR
OIL BYP PRI HYD
INDICATOR
Figure 7–24.
Pilot Caution/Warning Panel
Task
Result
d. Release PRESS TO TEST indicator.
e. Perform external power application –
hydraulic (primary) (TM 1-1520-238-23).
f. On pilot instrument panel, check that PRI
HYD indicator (fig. 7–25) indicates 3000
PSI.
If PRI HYD indicator does not indicate 3000 PSI, go to
paragraph 7–14.
M68-010
PRI
HYD
INDICATOR
Figure 7–25.
Pilot Dual Hydraulic Pressure Indicator
g. On pilot caution/warning panel (fig. 7–24),
check that PRI HYD PSI, OIL LOW PRI
HYD, OIL BYP PRI HYD indicators are not
lighted.
If PRI HYD PSI indicator is lighted, go to paragraph
7–15.
If OIL LOW PRI HYD indicator is lighted, go to
paragraph 7–16.
If OIL BYP PRI HYD indicator is lighted, have
assistant manually reset primary hydraulic manifold
pressure and/or return dirty filter indicator (fig. 7–26).
If indicators are retracted, or if either indicator pops
up after manual reset, go to paragraph 7–17.
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