TM 5-2350-262-20-3
TYPICAL NO. 1 AND 4 ACTUATOR SCHEMATIC DIAGRAM
Shock load and replenishing check valve:
Leveling fill valve:
Permits replenishing of accumulator via port 9, but
Opened by cam to replenish
prevents accumulator pressure surges from entering
accumulators and raise
circuit No. 9
vehicle when vehicle is too
low
Relief valve:
Protects unit from
Ports 11, 17, 2 and 3 are plugged on
high- pressure surges
LH or RH side of unit, depending on
desired direction of shaft rotation.
When plugs are installed as shown,
pressure to port 2 will cause clockwise
shaft rotation
x
Cam:
Bolted to actuator shaft, opens
and closes leveling valves at
appropriate points of shaft
rotation (at appropriate vehicle
x
height)
Leveling dump valve:
Opened by cam to drain
accumulators and lower
vehicle when vehicle is too
high
Rotary actuator shaft:
(mounts roadwheel arm)
Dampening valve:
Permits free flow into accumulators
so they can rapidlyabsorb suspension
shocks, but restricts flow rate from
accumulators to provide smooth
reaction to suspension shocks
Wheel valve:
A. In SPRUNG mode (shown),
actuator shaft is hydraulically
connected to accumulators
(suspension has springs), and flow
from leveling dump valve can
return to reservoir through port
Wheel accumulators:
7A
Attach to port 1 of rotary actuator,
B. In UNSPRUNG mode (port 11
function as suspension springs when
pressurized), actuator shaft is
vehicle is in SPRUNG mode
isolated from accumulator
(suspension has no springs), flow
from leveling dump valve is
blocked to prevent loss of
accumulator pressure during
dozing, and actuator shaft is
hydraulically connected to main
control valve via port 3
