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 146 of 481

Change 2

2-47

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

12

(contd)

13

Before

Before

Controls

and

Instru-

ments

(contd)

Central

Tire

Inflation

System

(CTIS)

o.

Determine spring brake

ability to hold vehicle (para. 3-13).

Apply service brake (7), place

transmission in 1-5 drive, raise

spring brake valve lever (4),

release service brake (7), increase

engine rpm until braking is felt —

do not exceed 1000 rpm.

DRIVER

NOTE

CTIS references apply only to

M939A2 series vehicles. If CTIS

is not operational, shut off power

switch, disconnect electrical

connector from ECU, and

complete mission (para. 3-16).

a.

With engine running, depress

RUN FLAT button (10). Check

system for air leaks. Refer to table

3-2.

b.

With engine running, select

one deflate and one inflate tire

pressure mode on selector panel (9)

and check that tires deflate or

inflate (para. 2-14).

o.

Vehicle

moves with

spring brake

engaged.

CREWMEMBER

PROCEDURE