Fuel System (Rev 1/97)
97
number 1 cylinder should be lined up with the index
timing mark on the starter mounting plate.
8. If the timing marks do not line up, timing shims must
be added or subtracted from the group to timing shims
between the injection pump and the injection pump
housing. Adding shims retards the timing. Subtracting
shims advances the timing. Changing the total thick-
ness of shims by .004 in. (0.01 mm) will change the
timing by approximately 1 degree.
9. After changing shims, check the timing again.
10. When the timing is correct, place a light coat of sealant
on the shims, the injection pump, and the injection
pump. New shims can be dipped in lacquer thinner to
activate the sealant.
11. Install the injection pump. Torque the mounting nuts to
18 to 20 ft-lb (24 to 27 mm).
12. Install the delivery valve and spring. Torque the
delivery valve spring retainer to 29 to 32 ft-lb (39 to 43
mm).
13. Replace and tighten the injection lines, bleed the air
from the fuel system, and test run the engine.
Individual Cylinder Timing
To check the individual cylinder timing, follow the proce-
dure for timing the injection pump to the engine, but do not
adjust the timing. Check the timing of the other cylinders
after checking the number 1 cylinder. The injection timing
mark for each cylinder should line up in the same position
as the timing mark for the number 1 cylinder, if the individ-
ual cylinders are correctly timed to each other.
If the individual cylinders are not in time, The injection
pump must be removed and sent to a qualified diesel injec-
tion service shop for calibration.
NOTE: On the three cylinder engines the order for the fly-
wheel timing marks is 1, 2, 3, but the firing order is 1,3,2.
The reason for this is that the engine fires every 240
degrees of crankshaft rotation. Therefore, when checking
the individual cylinder timing, check the number 1 cylin-
der first. Then rotate the engine past the number 2 cylin-
der timing marks to the number 3 cylinder timing marks
and check the number 3 cylinder. Finally, rotate the
engine past the number 1 cylinder timing marks to the
number 2 cylinder timing marks and check the number 2
cylinder.
Three Cylinder Firing Order
Injection Nozzles
Testing
1. Attach the injection nozzle to a nozzle tester (Part No.
204-290).
NOTE: Use only testing fluid or clean filtered diesel
fuel to test injection nozzles.
aea357