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 152 of 481

19
20
During
During
Gauges
CTIS
DRIVER
a.
Monitor all gauges during
operation (para. 2-3).
CAUTION
If oil pressure gauge reads 0
psi, stop engine. Failure to do
so may cause damage to inter-
nal engine components.
b.
Engine oil pressure gauge reads
less than 15 psi (103 kPa) on
M939/A1 series vehicles or 10 psi
(68 kPa) on M939A2 series vehicles
at idle; stop engine if pressure is zero.
DRIVER
CAUTION
Do not disconnect CTIS connec-
tor from ECU with power on.
Damage to ECU will result.
NOTE
CTIS reference applies only to
M939A2 series vehicles. If CTIS
is not operational, shutoff power
switch, disconnect electrical con-
nector from ECU, and complete
mission (para. 3-16).
While driving, check that amber
overspeed warning light (6) illu-
minates either in cross-country, sand,
or emergency modes (para. 2-14).
a.
Speedometer
is inoperative.
Notify Unit
Maintenance if
speedometer nee-
dle does not
move, jerks
unevenly during
sustained speeds,
or appears stuck.
b.
Engine oil
pressure is less
than 15 psi (103
kPa) on M939/A1
or 10 psi (68 kPa)
on M939A2 at idle.
Change 2
2-53
ITEM
NO.
INTERVAL
ITEM TO
CHECK/
SERVICE
NOT FULLY
MISSION
CAPABLE IF:
TM 9-2320-272-10
LOCATION
CREWMEMBER
PROCEDURE
Table 2-3. Preventive Maintenance Checks and Services for Models M939/A1/A2 (Contd).


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