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 350 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:
c.
Ensure front emergency shutoff valve is closed
and emergency and service air dummy couplings are
securely fastened (TM 9-2320-272-10).
18
Semiannual
Frame and
Crossmembers
NOTE
Inspection of crossmembers, bolts, and rivets
will be accomplished over complete vehicle.
Tighten, repair, and/or replace components
of these compressed air systems as re-
quired. If maintenance is required at a higher
level, records should reflect closest point of
reference to ensure proper identification of
components requiring service.
Inspect crossmembers for missing rivets, screws,
obstructions to other components and breaks
(TB
9-2300-247-40).
Screws or rivets loose or
missing.
(1)
Using a 0.001 in. feeler gauge, check for space
between rivet head and the riveted frame members.
Penetration of the feeler gauge between the rivet head
and riveted member is reason to suspect the riveted
connection and/or rivet should be replaced.
(2)
Thoroughly clean, grease, and oil rivet. Using
an oil can, apply lubricating oil around the connection.
Allow approximately 10 to 20 seconds for oil to
penetrate. Wipe rivet and riveted connection free of oil.
Tap rivet with an 8-pound hammer. Any indication of oil
around the rivet indicates a loose rivet. Replace all loose
rivets (TB 9-2300-247-40). Check all riveted connections
for signs of movement, such as bare or shiny spots or
other indications of movement between rivet and frame.
If movement is indicated, rivet and connection are loose.
TM 9-2320-272-23-2
0207
0207-15
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