TM 5-4310-452-14
4-72. HOSES, LINES, AND FITTINGS REPLACEMENT.
This Task Covers:
a. Removal
b. Installation
Initial Setup:
Equipment Conditions:
Materials/Parts:
• Engine off.
•· Four self-locking screws
• Trailer parked on flat, level surface.
• Nine self-locking nuts
• Parking brake set.
• System air pressure relieved.
Tools/Test Equipment:
• General mechanic's tool kit
a.
REMOVAL
1.
Remove service and emergency quick coupling halves (3 and 5) from hose assemblies (4 and 6).
2.
Disconnect hose assemblies (4 and 6) from 2 elbows (7).
3.
Disconnect hose assemblies (10 and 11) from swivels (9). Remove elbows (7) from adapters (8), and swivels from
frame.
4.
Disconnect hose assemblies (10 and 11) from swivels (41).
5.
Remove 4 self-locking screws (42), nuts (12), and 8 loop clamps (43) from hose assemblies (10 and 11) and frame.
Remove hose assemblies. Discard self-locking screws and nuts.
6.
Remove 2 swivels (41) and pipe elbows (40) from relay valve (39).
7.
Disconnect hose assembly (14) from swivel (37).
8.
Remove swivel (37) and 2 elbows (13 and 38) from relay valve (39) and master cylinder (15).
9.
Remove 4 screws (2) and 2 dummy couplings (1) from frame.
10, Remove 2 hose assemblies (23 and 34) from 2 tube tees (22 and 29) and tube elbows (24).
11. Disconnect brake line (18) from reducer (17) and tube tee (22). Remove 2 screws (19), self-locking nuts (21), loop
clamps (20), and brake line (18) from frame. Discard self-locking nuts.
12. Remove reducer (17) and washer (16) from master cylinder (15).
13. Disconnect brake line (36) from tube tees (22 and 29). Remove 3 screws (19), self-locking nuts (21), loop clamp
(20), and brake line. Discard self-locking nuts.
NOTE
Perform steps 14 through 17 to remove either the front or rear axle brake lines.
14. Remove brake line (26 or 30) and reducer (25) from tube elbow (24) and wheel cylinder assembly.
15. Remove 3 screws (32) from loop clamps (31).
16. Remove brake line (35 or 33), reducer (28), and loop clamps (31) from tube elbow (24) and wheel cylinder assembly.
17. Remove screw (27) and tube elbow (24) from axle.
4-140
