TM 55-4920-428-13
f. Remove the three unions and packings from valve (89). Remove the plug from the valve.
g. Install the plug in the valve. Install the three unions and packings. Coat them with hydraulic fluid
(item 2, table 5-2).
h. Install the tee in the union (step e.).
i. Install the valve in the panel. Install and tighten attaching hardware.
j. Position the handle on the valve. Install and tighten the screw holding the handle in position.
k. Perform an operational check. (Ref para 5-18.)
l. Perform the proof pressure test. (Ref para 5-44.)
m. Install the panel in the case. (Ref para 5-45.)
5-31. Replacement of LOW or HIGH PRESS Relief Valves.
a. (See fig. 6-5.) Remove the panel from the case (para 5-22).
b. Remove the knob by rotating it CCW. Remove the spring.
c. Disconnect the two tubes from the elbows at the relief valve (95).
d. Remove two (or four) mounting screws.
e. Remove the valve from the panel.
f.
g.
h.
i.
j.
k.
l.
NOTE
Record the position of the elbows.
Remove the two elbows from the valve.
Install the elbows in the replacement valve.
Position the valve on the panel.
Install the attaching screws.
Connect the two tubes to the relief valve elbows.
Perform an operational check. (Ref para 5-18.)
Perform a proof pressure test. (Ref para 5-44.)
m. Install the panel in the case. (Ref para 5-45.)
5-32. Replacement of LOW PRESS REGULATOR Valve.
a. (See fig. 6-5.) Remove the panel from the case. (Ref para 5-22.)
b. At regulator valve (94), disconnect two tubes from the reducers and two tubes from the tee.
5-9
