TM-9-2320-272-23-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-2 - Page 383 of 1417
Table
1.
Field Preventive Maintenance Checks and Services - Continued.
ITEM
NO.
INTERVAL
ITEM TO BE
CHECKED OR
SERVICED
PROCEDURE
EQUIPMENT
NOT READY/
AVAILABLE IF:
3
Annual
Rear Suspension
a.
Inspect forward-rear and rear-rear axle housings
and differentials for cracks.
WARNING
Do not allow grease or oil to contact brake
linings. Linings can absorb grease and oil,
causing early glazing and very poor braking
action. Failure to comply may result in injury
or death to personnel.
b.
Tighten forward-rear and rear-rear axle drive
flange screws 60 to 100 lb-ft (81 to 136 N·m).
c.
Ensure all differential companion flange
mounting screws and U-joint mounting screws are tight.
Tighten companion flange mounting screws
30
to
40
lb-ft
(41 to 54 N·m) and U-joint mounting
screws 90
to
110
lb-ft (122 to 149 N·m).
d.
Test spring seat bearing free play by placing
jack under spring seat bracket. Raise vehicle so spring
moves freely up and down in guide brackets. Put prybar
between U-bolt saddle and lift pin. Pull up on prybar. If
there is free play, adjust spring seat bearing (Volume 3,
WP
0540).
4
Annual
Compressed Air
System
WARNING
•
Chock vehicle wheels. Failure to comply
may result in injury or death to
personnel.
•
Wear safety goggles while performing
inspection. Line is under pressure.
Failure to comply may result in injury or
death to personnel.
Check for faulty check valves at the primary and
secondary air tanks and crossed hoses. Crossed hoses
occur from (A) treadle valve air supply hoses at the
primary and secondary air tanks, and (B) primary and
secondary air gauge lines at the treadle valve.
TM 9-2320-272-23-2
0208
0208-4
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