TM-9-2320-361-34

2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

MAY 1992
TM-9-2320-361-34

  TM-9-2320-361-34 - Page 301 of 764

TM 9-2320-361-34
13-4. FIFTH WHEEL MAINTENANCE (Contd)
I
b. Cleaning and Inspection
I
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
13-16
For general cleaning instructions, refer to para 2-8.
Inspect
two coupler jaws
(12) for cracks
and breaks. Replace if cracked or broken.
Inspect
cam (10) for grooves and breaks. Replace if grooved or broken.
Inspect
springs (2), (5), (11), and (13) for bends, breaks, and collapsed coils. Measure spring lengths.
Refer to table 13-1, Fifth Wheel Spring Length, for measurements. Replace if bent, broken, or coils
are collapsed.
Inspect pinion gear (6) for damaged gear teeth. Replace if damaged.
Inspect plunger rack (3) for cracks and breaks. Replace if cracked or broken.
Inspect handle (1) for bends and cracks. Replace if bent or cracked.
Inspect
fifth wheel housing surface (8) for grooves, gouges, and breaks in metal. Replace if damaged
or broken.
Inspect plunger rack latch
(4)
for bends and scoring. Replace if bent or scored.
Inspect stud (7) for breaks, cracks, and stripped threads. Replace if damaged.
Inspect bushings (15) for cuts, wear, or damage. Replace if damaged.
Inspect compression arm (14) for cracks, breaks, and bends. Replace if cracked, broken, or bent.
Inspect plunger rack (3), pivot pin (9), and cam (10) for wear. Measure plunger rack (3), pivot pin (9),
and cam (10). Refer to table 13-2, Fifth Wheel Wear Limits, for measurements. Replace if worn.
Table 13-1. Fifth Wheel Spring Length.
ITEM
SPRING FREE LENGTH
NO.
lTEM/POINT OF MEASUREMENT
INCHES
MILLIMETERS
2
Plunger rack spring
7.25
184.15
5
Plunger rack latch spring
2.06
52.32
11
Handle spring
6.00
152.4
13
Coupler jaw spring
2.31
58.67
Table 13-2. Fifih Wheel Wear Limits.
ITEM
lTEM/POINT OF MEASUREMENT
WEAR LIMITS/TOLERANCES
NO.
INCHES
MILLIMETERS
3
Plunger rack, outer diameter
2.874-2.878
72.999-73.101
9
Pivot pin
Outer diameter
1.47 -1.53
37.34-38.86
Length
6.44-6.59
163.57-167.38
10
Cam, inner diameter
1.093-1.099
27.76-27.91


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