TM-9-2320-272-23-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-2 - Page 280 of 1417
FIELD MAINTENANCE
G07: IDLE SPEED/GOVERNOR CHECK
INITIAL SETUP:
Personnel Required
(2)
References
WP
0195
TROUBLESHOOTING PROCEDURE
G07: IDLE SPEED/GOVERNOR CHECK
STEP
1.
Check engine idle speed.
a.
Dial 10 into TEST SELECT and press TEST.
Table
1.
Engine RPM Test.
TEST NO.
TEST
10
Engine RPM
b.
Adjust engine idle speed to 500-650 RPM.
c.
Watch VTM readout display for about 10 seconds to verify idle speed remains within tolerance.
CONDITION/INDICATION
Is engine idle speed within limits?
DECISION
YES - Go to Step (2).
NO - Notify supervisor.
STEP
2.
Shut down engine.
CONDITION/INDICATION
DECISION
YES - Perform G08:Compression Unbalance Test Test (WP
0195).
NO - Notify supervisor.
END OF WORK PACKAGE
TM 9-2320-272-23-2
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