TM-9-2320-272-10
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; OPERATOR'S MANUAL
SEPTEMBER 2004
CHANGE 2
TM-9-2320-272-10 - Page 199 of 481
2-98
Change 2
Table 2-3. Preventive Maintenance Checks and Services for Models M939/A1/A2 (Contd).
ITEM
NO.
INTERVAL
ITEM TO
CHECK/
SERVICE
NOT FULLY
MISSION
CAPABLE IF:
TM 9-2320-272-10
LOCATION
CREWMEMBER
PROCEDURE
84
84a
Monthly
Monthly
Frame
Inspection
Axle
Breather
DRIVER
a.
Check the chassis for loose or
missing screws (3) and rivets (4)
securing fifth wheel (2) to side
rails (5), and side rails (5) to vehi-
cle (TB 9-2300-247-40).
b.
Using a .001–inch–thick feeler
gauge, check for space between
rivet head and the riveted frame
members. Penetration of the feeler
gauge between the rivet head and
the riveted member is reason to
suspect that the riveted connection
and/or rivet should be replaced.
c.
Thoroughly clean rivet and
riveted connection of all dirt,
grease, and oil. Using an oil can,
apply lubricating oil around the
suspect rivet and riveted connec-
tion. Allow approximately 10 to 20
seconds for the oil to penetrate.
Wipe rivet and riveted connection
free of oil. Tap rivet with an eight-
pound hammer. Any indication of
oil around the rivet indicates a
loose rivet. Notify unit mainte-
nance to replace all loose rivets.
Check all riveted connections for
signs of movement, such as bare or
shiny spots, or other indications of
movement between rivet and fram-
ing member. If movement is indi-
cated, rivet and connection are
loose.
CAUTION
Axle breathers must be cleaned
before servicing to prevent dam-
age to axle from contamination.
Remove, clean, and lubricate
axle breathers every 1000 miles
(1600 km) or monthly, which-
ever occurs first.
Check all axle breathers (6) for
damage or dirt.
b.
Loose or
missing rivets.
c.
Loose or
missing rivets.
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