TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 94 of 1015
TM 9-2320-272-24-1
Table 2-1. Unit Preventive Maintenance Checks and Services (Contd).
ITEM
NO.
INTERVAL
9
10
Semi-
annual
Semi-
annual
ITEM TO
CHECK/
SERVICE
Emergency
engine stop
control
Air filter
PROCEDURE
NOTE
l
Before M939/A1 series vehicles can be restarted,
fuel shutoff valve control lever under the hood
must be reset.
l
This check will be performed with engine running,
transmission in N (neutral), and parking brake
applied.
Check emergency engine stop control:
1.
Pull emergency engine stop control out until engine
stops. If engine does not stop before emergency engine stop
control is pulled completely out, place battery switch in the
OFF position, and troubleshoot (para. 2-21).
2.
Push emergency engine stop control in until original
position is obtained.
AFTER ROAD TEST
Perform all After operation, Weekly, and Monthly
checks in TM 9-2320-272-10, then make the
following inspections in the order given, including
kit items on vehicles so equipped.
WARNING
If NBC exposure is suspected, all filter media should
be handled by personnel wearing protective
equipment. Consult your unit NBC officer or NBC
NCO for appropriate handling or disposal instructions.
a.
Inspect filter element for tears and presence of dirt
and oil.
1.
If dirt is present, clean filter element
(TM 9-2320-272-10).
2.
If oil is present, replace filter element.
b. Check for oil in air cleaner manifold. If present:
1.
Check oil level in transmission and transfer case. If
oil levels are excessive, drain excess (para. 3-133).
2.
Check for fuel diluting the oil. If necessary, change
oil and filters (para. 3-133).
3.
If oil levels are low, check transfer case interlock
air cylinder for leaks (para. 3-143).
NOT FULLY
MISSION
CAPABLE IF:
Engine fails to shut
off.
2-6
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