TM 5-3805-260-24
22. Turn the crankshaft. slow, in a counter clock-
wise direction. Do this until the ]low, of fuel
from the end of tube assembly (9) is 12 to 18
drops per minute.
23. Stop rotation of the crankshaft *when the flow of
fuel is 12 to 18 drops per minute. Take a
reading of the measurement on dial indicator
(3).
24. To check for correct timing of the fuel system,
make a comparison of the reading on dial
indicator (3) with the correct measurement in
the chart. Timing must be set within - I" of
correct timing angle.
TIMING
ANGLE
INDICATOR READING
16’
127 In.
3 23
mm
NOTE: If the timing of the fuel system is different
than the correct timing dimension given in the chart,
see the subject CHECKING TIMING BY TIMING PIN
METHOD.
Checking Automatic Timing Advance Unit By Timing
Light Method
Tools Needed:
1P3500 Injection Timing Group or
2P8280 Injection Timing Group
Either group can be used to check the automatic
timing advance.
1P3500 INJECTION TIMING GROUP
NOTE: When either of these injection timing groups
is used, the cap from the 9N3979 Nozzle Assembly
must be removed. This will let fuel bleed from the
cap end of the nozzle, and will maintain line
pressure in the normal range.
CAUTION
Do not use the engine in service with the cap
removed from the nozzle. The fuel will drain
into the crankcase and the result will be thin
oil (oil dilution). Also a new 1H1023 Seal
must be used when the cap is installed.
FUEL SETTING
Tools Needed:
5P4203 Field Service Tool Group
The procedure that follows for fuel setting can be
done with the housing for the fuel injection pumps
either on or off the engine.
REMOVAL OF COVER
1. Shut-off solenoid. 2. Cover.
CAUTION
Before any service work is done on this fuel system,
the outside of the housing for the fuel injection
pumps and all parts connected to it must be
especially clean.
1Remove shut-off solenoid (1) and cover (2).
2. Put the 5P298 Zero Set Pin (5), with 17.8507 on it,
in the pump housing.
INSTALLATION OF COVER
3. 5P4226 Adapter. 4. 3J6956 Spring. 5. 5P298 Zero
Set Pin, with 17.8507 on it.
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