TM 9-2320-273-20
BRAKE SYSTEM.
9-23. QUICK RELEASE/DOUBLE-CHECK VALVE MAINTENANCE (Continued).
LOCATION/lTEM
ACTION
REMARKS
NOTE
On the M915, the valve is located forward
of the fifth wheel on the right frame rail.
On the M916 thru M920 it is on the left
frame rail.
A . R E M O V A L.
1. Four air lines(1).
(M916 thru M920 have
five air lines.)
2. Two nuts (3), washers (2),
and bolts (5).
B. INSTALLATION.
3. New valve (4).
4. Valve (4).
5. Four air lines (1).
C. OPERATIONAL CHECK.
6. Engine.
Start up (see TM 9-2320-273-
10). Allow system to reach
operating pressure of 105-120
psi (724-827 kPa).
7. CAB/Brake pedal.
Press and release.
Second mechanic.
a. Unscrew and remove.
b. Inspect for:
1. Cracks.
2. Damaged fittings.
Unscrew and remove. Re-
move valve (4).
Transfer all components
(elbows, adapters, etc.) to
new valve. Use liquid teflon
on threads.
Attach to frame rail with two
nuts (3), washers (2), and
bolts (5). Tighten nuts and
bolts.
a. Coat fittings with liquid
teflon.
b. Screw on and tighten.
Tag lines for ease of
installation.
Replace, if necessary.
9-88
