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 TM 55-1905-223-24-18-1
The reduction gear clutch selector lever must be in the neutral position
with no binding or load applied.
REPLACEMENT
Replace Directional Control Rotary Valve (Pilothouse Control Station).
a.
Remove tags.
(1) Connect flexible hoses at connections (3, 10, and 11).
( 2 ) Install directional control rotary valve (2) in pilothouse control
console. Secure with four capscrews (1).
b . Install Shuttle Valve.
(1) Screw elbow (5) into shuttle valve.
( 2 ) Position shuttle valve (8) for connection to tubing.
(3) Connect tubing (1, 3, and 6) at connections (2, 4, and 7).
Restore air pressure to pilot house control console. Remove tags.
C.
ADJUSTMENT (FIGURE 2-98)
Pressure Setting Adjustment. Hex adjusting screw on the pressure regulator
a.
varies the maximum and minimum pressure setting the same amount. Turning the
screw "IN" raises the maximum and minimum pressure at the pressure regulator
"OUT" port, turning it out will decrease maximum and minimum pressure. To
make adjustment, first plug ports 1 and 3, place an air gauge in pressure
regulator "OUT" port, and connect 120 psi supply to the inlet connection,
Move the handle to maximum pressure position, then turn adjusting screw in or
out until required pressure is seen on the pressure gauge.
b. Friction Drag Adjustment. Handle force of the control station can be varied
by adjusting hex set screw. This adjustment increases or decreases the
manual force required to move or hold the handle in any desired position.
Facing the handle side, a clockwise rotation will increase the friction drag.
The detent force of the control station lever can
c. Handle Detent Adjustment.
be varied by adjustment detent screw. This adjustment increases or decreases
the manual forces required to remove the handle from a detented position.
Facing the handle side clockwise rotation of screw will increase detent
force.
2-462
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