TM 1-1520-238-T-5
7–80
7–21.
UTILITY HYDRAULIC SYSTEM – MAINTENANCE OPERATIONAL CHECK (cont)
7–21
SELECTOR VALVE
INBOARD
POSITION
HAND PUMP HANDLE
AFT POSITION
OUTBOARD
POSITION
M68-017A
Figure 7–34.
Hydraulic Hand Pump Selector Valve
7. On pilot center circuit breaker panel (fig. 7–35), close the LT CAUT, TWHL LOCK, and LT PRI circuit
breakers.
M68–018
RTR BRK
LT PRI
TWHL LOCK
LT CAUT
Figure 7–35.
Pilot Center Circuit Breaker Panel
8. Complete the maintenance operational check as follows:
Task
Result
a. Using hydraulic hand pump handle, fill utility
hydraulic manifold reservoir to normal
operating level (TM 1-1520-238-23).
If hydraulic hand pump does not service utility
hydraulic manifold reservoir, go to paragraph 7–23.
b. Set hydraulic hand pump selector valve to
AFT position. On pilot caution/warning panel
(fig. 7–36), check UTIL HYD PSI indicator.
If UTIL HYD PSI indicator is not lighted, replace lamp
(TM 1-1520-238-23). If lamp still does not light, go to
paragraph 7–24.
c. Perform external power application –
hydraulic (utility) (TM 1-1520-238-23).
