REFERENCE INFORMATION
TM 9-2320-387-24-l
FUEL SYSTEM
._ -I
Governor no-load speed is
with the transmission
in
neutral.
Loaded speed is
with the transmission in
gear and the vehicle moving.
-It is the maximum rpm the
engine will develop. The engine
will surge at governor speed
since the governor will try to
lower the engine speed and the
accelerator is trying to increase it.
A number over 75 is passing for STE/lCE-R
test 13. If the vehicle seems to be low on
power while driving, you have to check for
other things which could cause this such
as the transmission.
To try a road test, accelerate the vehicle
from 0 to a safe and reasonable speed on
a reasonably level road.
ENGINE RPM
STEIICE-R TEST 10
1. Start Test 10, Engine RPM.
2. Crank or start the engine. Displayed
reading is RPM. Cranking rpm should be
approximately
1 W-200.
Idle rpm should be
700-750.
ENGINE POWER TEST (PERCENTI
STUICE-R TESi 13
’
1. Set TEST SELECT switches to 13.
2. Press and release TEST button.
3. Watt for prompting message CIP to appear.
4. When CIP appears on display, press down
sharply on engine accelerator and hold it
to the floor. When VTM displays OFF, release
accelerator.
5. A number will be displayed after the
engine has returned to idle speed. This
number is the test result in units of percent
of nominal rated power.
- :
If the exhaust is not colorless. it must
be either white, blue, or black. If
exhaust color is:
WHITE .._....... Go to G. page 2-126. Also could be injector timing. Notify DS maintenance (chapter 14).
BLUE . . . . . . . . . . . . Blue smoke is a sign of oil entering the combustion
chambers.
It usually enters past the piston rings or intake
valve stem seals. This is an internal engine problem that
can’t be handled at this level of maintenance.
You may
want to run the engine running tests, page 2-51, before you
notify DS maintenance (chapter 14).
BUCK . . . . . . . . . Air intake/exhaust,
page 2-l 41.
2-105
