TM 9-2320-272-24-3
4-130. FIFTH WHEEL MAINTENANCE (Cod)
c. Assembly
1.
Install compression arm (3) and two coupler jaws (1) in fifth wheel housing (8) with two bushings (9).
2.
Align hole in compression arm (3) with hole in fifth wheel housing (8).
3.
Install two washers (7), new lockwashers (6), and screws (5) on two bushings (9). Tighten screws (5)
150-200 lb-ft (203-271 Nm).
4.
Install two lubrication fittings (4) on screws (5).
5.
Install spring (2) on two coupler jaws (1).
6.
Install bushing (33) and cam (34) on fifth wheel housing (8) with new lockwasher (35) and screw (36).
7.
Place spring (16) on plunger rack (27).
8.
Install screw (31), spacer (29), and plunger rack (27) on fifth wheel housing (8).
NOTE
Add washers as needed to obtain proper height on plunger rack
latch. Latch must set level with latch on plunger rack.
9.
Install plunger rack latch (26), bracket (23), two washers (22), new locknuts (21), and safety wire (18)
on screw (31) and stud (30).
10.
Install new cotter pin (24) on fifth wheel housing (8), with eye of cotter pin (24) facing toward back
of fifth wheel housing (8).
WARNING
Eye protection must be worn when installing springs under
tension. Failure to do so may result in injury to personnel.
11.
Install spring (25) on plunger rack latch (26) with cotter pin (24).
12.
Install pinion gear (28) on fifth wheel housing (8) with screw (32), spacer (20), washer (19), and new
locknut (17).
13.
Install jamnut (11) on handle (10) and install handle (10) on yoke (13). Tighten jamnut (11)
80-95 lb-ft (108-129 Nm).
14.
Install yoke (13) on pinion gear (28) with screw (12), washer (14), and new locknut (15).
15.
Install new cotter pin (38) in fifth wheel housing (8).
16.
Install spring (37) on handle (10) and cotter pin (38).
4-688
