TM-9-2320-361-24-1

2-1/2 TON, 6X6, M44A2 SERIES TRUCKS

TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE PART 1 OF 2

AUGUST 2006

TM-9-2320-361-24-1 - Page 333 of 1176

TM 9-2320-361-24-1

0018 00

0018 00-29

SIMPLIFIED TEST EQUIPMENT FOR INTERNAL COMBUSTION ENGINE—

REPROGRAMMABLE STE/ICE-R NO-GO CHAIN TROUBLESHOOTING (Contd)

Table 2. STE/ICE-R No-Go Chain Test (Contd).

GOVERNOR/POWER TEST FAULT ISOLATION (Contd)

NG90

TK

MODE

RUN COMPRESSION UNBALANCE TEST:

• Shut off fuel supply so engine will not start.

• Dial 14 into TEST SELECT switches and press TEST.

• Wait for prompting message GO to appear.

2

• When GO appears, crank engine.

• Just after starting to crank, VTM display should

change to four dashes, indicating VTM is

accepting data.

• Stop cranking when VTM displays OFF or E013.

• Wait for a number to be displayed.

• Stop cranking when VTM displays OFF or E013.

• Does VTM display a number?

• Does VTM display FAIL?

• VTM displays E013. This may

indicate discharged batteries or

low cranking speed. Also, operator

may have stopped cranking during

test. Check and repeat test.

• Proceed to next page.

NO

YES

YES

NO

YES

NO

PROMPTING

MESSAGE

TEST NO.

TEST

14

COMPRESSION

UNBALANCE

• Repeat compression unbalance test.

• If FAIL message still appears, refer to

Mechanical Systems Troubleshooting Index

(WP 0007 00) to diagnose engine.

• Does VTM display GO?