5-29. Replacement of HIGH PRESS SHUTOFF VALVE, RETURN SHUTOFF
VALVE, or RETURN BACK PRESS valve.
(See fig. 6-5.) Remove the panel from the case. (Ref para 5-22.)
The removal procedures for the three components are identical. The
task are written for the HIGH PRESS SHUTOFF VALVE.
Disconnect the two tubes from the valve unions.
Remove the valve knob. (Ref para 3-11.)
Remove the hardware which secures valve (40 or 46) to the panel. Remove the valve.
Remove the two unions and packings from the valve.
Install the two unions and packings. Coat them with hydraulic fluid (item 2, table 5-2).
Position the valve on the panel. Install the retaining hardware.
Install the knob and pin. Tighten set screw.
Connect and tighten the two tubes to the unions.
Perform an operational check. (Ref para 5-18.)
Perform the proof pressure test. (Ref para 5-44.)
Install the panel in the case. (Ref para 5-45.)
5-30. Replacement of Selector Valve.
Procedure is typical for six valves.
a. (See fig. 6-5.) Remove the panel from the case (para 5-22).
b. Disconnect the two tubes from the unions on valve (89). Disconnect the two tubes from the tee.
c. Remove the valve handle (para 3-9).
d. Remove the valve retaining hardware. Remove the valve from the panel.
Record the location and angle of the tee.
e. Remove the tee from the union. Record the location of the plug.