TM 55-4920-428-13
c. Remove the two nuts, washers, and screws which attach the valve to the bracket.
d. Loosen the setscrew and remove the knob. Unscrew the limiter knob.
e. Remove the valve from the panel.
NOTE
Record the positions of fittings.
f. Remove the reducers, packings, tee, and nut from the valve.
g. Install the fittings and packings in the replacement valve. Coat with hydraulic fluid (Item 2, Ta-
ble 5-2).
h. Position the valve on the panel. Secure the valve with two screws, washers, and nuts.
i. Connect the four tubes.
j. Screw the limiter knob on the valve shaft.
k. Install the knob on the valve. Tighten the knob setscrew.
l. Perform an operational check. (Ref para 5-18.)
m. Perform the proof pressure test. (Ref para 5-44. )
n. Install the panel in the case. (Ref para 5-45.)
5-33. Replacement of Pressure Reducing Valve.
a. (See fig. 6-5.) Remove the panel from the case. (Ref para 5-22.)
b. At valve (78), disconnect the two tubes from the nipples.
c. Remove the four screws attaching the valve to the standoffs. Remove the valve.
d. Remove the two nipples from the valve.
e. Install the nipples in the replacement valve. Use teflon tape (item 3, table 5-2).
f. Position the valve on the standoffs. Install and tighten the four attaching screws.
g. Connect the two tubes.
h. Adjust the valve. (Ref para 5-43.)
i. Perform an operational check. (Ref para 5-18. )
j. Perform the proof pressure test. (Ref para 5-44.)
k. Install the panel in the case. (Ref para 5-45.)
5-34. Replacement of CASE VENT LINE PRESS Valve.
a. (See fig. 6-5.) Remove the panel from the case. (Ref para 5-22.)
b. Disconnect the two tubes from the valve (40).
c. Remove the valve knob. (Ref para 3-11.)
5-10
