TM 5-3810-306-20
R-12 RELAY VALVE REPLACEMENT
TOOLS: General mechanic’s tool kit: automotive (5180-00-177-7033)
SUPPLIES:
Lockwashers (Item 15, Appendix C) (4 Required)
EQUIPMENT CONDITIONS: Wheels are chocked.
Disconnect ground cable at shunt. (Refer to page 8-109.)
Air system is purged. (Refer to page 11-2.)
REMOVAL:
1.
REMOVE R-12 RELAY VALVE (1).
a.
Tag and disconnect four air lines on R-12 relay
valve (1). Plug air lines.
b.
Remove two capscrews (3), lockwashers (2)
and nuts (4) securing relay valve assembly and
bracket (5)
to
chassis
frame.
Discard
lockwashers (2).
c.
Remove two capscrews (6) and lockwashers (7)
securing R-12 relay valve (1) to bracket (5).
Discard lockwashers (11).
d.
Remove relay valve and fittings from relay valve.
INSTALLATION:
1.
INSTALL R-12 RELAY VALVE (1).
a.
Install fittings on relay valve and relay valve onto
bracket (5). Secure with two capscrews (6) and
new lockwashers (7).
b.
Align relay valve mounting bracket with mounting
holes on chassis and secure with two capscrews
(3), new lockwashers (2) and nuts (4).
c.
Remove tags, plugs and connect air lines to R-
12 valve (1).
2.
CONNECT GROUND CABLE AT SHUNT. (REFER
TO PAGE 8-109.)
3.
START-UP ENGINE AND ALLOW AIR
PRESSURE TO BUILD UP. (REFER TO TM 5-3810-
306-10.)
4.
CHECK
ALL
AIR
OPERATED
FUNCTIONS.
(REFER TO TM 5-3810-306-10.)
END OF TASK
11-31
