TM-9-2320-272-24-3
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 3 OF 4
JUNE 1998
TM-9-2320-272-24-3 - Page 423 of 799
TM 9-2320-272-24-3
4-130. FIFTH WHEEL MAINTENANCE (Contd)
ITEM
NO.
2
5
12
13
Table 4-10. Fifth Wheel Spring Free Length.
SPRING FREE LENGTH
ITEM/POINT OF MEASUREMENT
INCHES
MILLIMETERS
Locking plunger spring
7.25
184.2
Plunger rack latch spring
2.0625
52.388
Handle spring
6.00
152.4
Coupler jaw spring
2.31
58.674
Table 4-11. Fifth Wheel Wear Limits/Tolerances.
ITEM
NO.
ITEM/POINT OF MEASUREMENT
INCHES
MILLIMETERS
4
9
10
Plunger rack - outer diameter
Pivot pin:
Outer diameter
Length
Cam - inner diameter
2.874-2.878
1.47-1.53
6.444-6.59
1.093-1.099
WEAR LIMITS/TOLERANCES
73.000-73.101
37.338-38.862
163.678-167.386
27.762-27.915
4-687
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