TM 10-5410-228-24
1.16 HYDRAULIC SYSTEM Continued.
Placing the control switches in the position corresponding to the above modes opens solenoid valves SV2 and
SV6 and closes SV9 by applying +24 Vdc to the coils. Operation of the hydraulic circuit is the same as the
vent mode except that solenoid valve SV6 is energized (open). This allows some portion of the total hydraulic
fluid flow to bypass the NBC fan motor, M3. Flow control valve FP2 is used to regulate the flow and hence
the speed of the NBC fan motor whenever the control switches are in the non-NBC mode. All other functions
are as previously described.
Valve
SV1
SV2
SV4
SV5
SV6
SV7
SV8
SV9
Energized State
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
Position
Closed
Open
Closed
Closed
Open
Open
Closed
Closed
Figure 1-27. Static Mode, External Power, Vent Mode, NBC Off