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 144 of 481

12

(contd)

Before

Controls

and

Instru-

ments

(contd)

h.

Readings

above or below the

green area or

inoperative.

i.

Oil tempera-

ture exceeds 300°F

(149°C).

j.

Engine oil

pressure is less

than 15 psi (103

kPa) on M939/A1

or 10 psi (69 kPa)

on M939A2 series

vehicles at idle

speed.

h.

Check voltmeter (5). Needle

should be in green area.

i.

Check transmission oil

temperature gauge (7). Normal range

is 120°F - 220°F (49°-104°C) (may not

read at low temperature).

CAUTION

If oil pressure gauge reads 0 psi,

stop engine.

j.

Engine oil pressure gauge (8)

reads at least 15 psi (103 kPa) on

M939/A1 or 10 psi (69 kPa) on

M939A2 series vehicles at idle speed.

2-45

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

Change 2

2-45