TM 9-2320-273-20
BRAKE SYSTEM.
9-26. TRACTOR PROTECTION VALVE MAINTENANCE (Continued).
LOCATION/lTEM
ACTION
REMARKS
A.
REMOVAL.
1. Airlines (1), (2), (3), and
2. Two nuts, Iockwashers, and
bolts (5).
3. Spacer clip (6).
4. Valve (7), M916, M917, M920
or valve (6), M915.
5. Valve (7), M916, M917, M920
or valve (6), M915.
B.
INSTALLATION.
6.
7.
8.
9.
Valve (7), M916, M917, M920
or valve (6), M915.
Spacer clip (6).
Two nuts, Iockwashers, and
bolts (5).
Air lines (1), (2), (3), and
(4).
C. OPERATIONAL CHECK.
10. Engine.
11. Valve (7), M916, M917, M920
or valve (6), M915.
Remove.
Remove.
Remove.
Remove.
Transfer all components (el-
bows, fittings, adapters, etc. )
to new valve. Coat threaded
joints with liquid teflon,
Install in vehicle.
Install
Install and tighten.
Install and tighten.
Start up (see TM 9-2320-
273-10). Allow system to
reach operating pressure of
105-120 psi (724-827 kPa).
Apply trailer supply valve
and brake pedal valve. Use
soap solution to check for
leaks.
Tag lines for ease of
location at installation.
(M916, M917, and M920
only, )
If installing new valve,
(M916, M917, and M920
only. )
Replace any damaged
lines and/or fittings.
Second mechanic
9-100
(4)
