TM 9-2330-359-14&P
4-39. AIR COUPLING MAINTENANCE (M872A1 AND M872A2).
This Task Covers:
a.
Removal
c. Assembly
b. Disassembly
d.
Installation
Initial Setup:
Equipment Conditions:
Materials/Parts:
• Semitrailer uncoupled from towing vehicle (para
2-18).
Anti seize tape (Item 14, Appendix E)
One preformed packing
Tools/Test Equipment:
One Iockwasher
• General mechanic’s tool kit
NOTE
Service and emergency air couplings are maintained the same way.
a.
REMOVAL
1.
Remove eight screws (4) and nose box cover (3)
from nose box (2).
2.
Disconnect air hose (1) from elbow (11).
3.
Remove elbow (11), nut (10), and lockwashers (9)
from reducer pipe (8). Discard Iockwasher.
4.
Remove reducer pipe (8) and air coupling (7) as
an assembly from nose box (2).
b. DISASSEMBLY
3
1.
Remove reducer pipe (8) from air coupling (7).
2.
Remove dummy coupling (5) and preformed
packing (6) from air coupling (7). Discard pre-
formed packing.
c.
ASSEMBLY
1.
Install new preformed packing (6) and dummy coupling (5) in air coupling (7).
2.
Apply antiseize tape to male threads of reducer pipe (8) and air coupling (7) and install reducer pipe on air
coupling.
TA508035
4-69
