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