TM 9-2320-273-20
BRAKE SYSTEM.
9-18. TRAILER HAND BRAKE VALVE MAINTENANCE (Continued).
LOCATION/lTEM
ACTION
REMARKS
B. INSPECTION OF AIR LINES AND FITTINGS.
6. Air supply line (6), air
Inspect for:
Replace as necessary.
delivery line (7), two
a. Cracks.
adapters (4), and valve (8).
b. Leaks.
c. Damaged threads.
C. INSTALLATION.
7. Knob (9).
Push onto valve handle.
8. Two adapters (4).
Screw into valve (8).
9. Valve (8).
Position on steering col-
umn (5).
10. Two capscrews (2) and
Screw in and tighten to
Iockwashers (1).
secure retaining strap (3)
to valve (8).
11. Air supply line (6) and
Screw air lines onto
Be sure to attach each Iine to
air delivery line (7).
adapters (4) and tighten.
the correct fitting as you marked.
D. OPERATIONAL CHECK.
12. Engine.
Start up (See TM 9-2320-273-
10). Allow pressure to reach 105-
120 psi (724-827 kPa).
13. Knob (9).
a. Pull down slowly.
1st mechanic.
b. Check for leaks at air
1st mechanic.
supply line (6) and air
delivery line (7).
c. Check for air pressure
2nd mechanic.
at gladhand connection
or trailer.
d. Return handle to normal
1st mechanic.
position.
14. Engine.
Shut down (see TM 9-2320-
273-10).
9-60
