TM 5-3810-307-10
Table 5-1. Operator Preventive Maintenance Checks and Services - Continued
ITEM
ITEM TO BE
NOT FULLY
NO.
INTERVAL
CHECKED OR
PROCEDURE
MISSION
SERVICED
CAPABLE IF
Relay defective or
Perform leakage test.
65
WEEKLY
Air System and
leaking.
Park Brake
a. With dual brake valve
in brake released
(Continued)
position, coat exhaust
port with soap solution
to check for inlet valve
and O-ring leakage. A
1 in. (2.54 cm) bubble
in five seconds is
permitted.
b. Place dual brake
valve in brake applied
position and check at
exhaust port for
leakage of exhaust
valve. Apply soap
solution around valve
where cover joins
body to check for seal
ring leakage. A 1 in.
(2.54 cm) bubble in
three seconds is
permitted.
c. With dual brake valve
still in brake applied
position, apply soap
solution to quick
release exhaust port
on R-12 valve to
check diaphragm
exhaust seat, and to
valve body in area
where the cover joins
body on R-12 valve, to
check for O-ring
leakage. No leakage
is permitted.
5-52
