Engine Tune-Up
DETROIT DIESEL
TIMING FUEL INJECTOR
Timing
Tool
Injector
Dimension
Number
*35
1.508
J 8909
35
1.484
J 1242
40
1.484
J 1242
45
1.484
J 1242
S40
1.460
J 1853
S45
1.460
J 1853
S50
1.460
J 1853
L40
1.460
J 1853
N40
1.460
J 1853
N45
1.460
J 1853
N50
1.460
J 1853
*Reefer Car
To time a fuel injector properly, the injector follower
must be adjusted to a definite height in relation to the
injector body.
Fig. 3 - Timing Fuel Injector
All of the injectors can be timed, in firing order
3.
Place the small end of the injector timing gage
sequence, during one full revolution of the crankshaft.
(see table for correct timing gage) in the hole provided
in the top of the injector body, with the flat of the gage
Time Fuel Injector
toward the injector follower as shown in Fig. 3.
After the exhaust valve clearance has been adjusted,
4.
Loosen the push rod lock nut.
time the fuel injector as follows:
5.
Turn the push rod and adjust the injector rocker
1.
Place the speed control lever in the idle speed
arm until the extended part of the gage will just pass-
position. If a stop lever is provided, secure it in the no-
over the top of the injector follower.
fuel position.
6.
Hold the push rod and tighten the lock nut.
2.
Rotate the crankshaft, manually or with the
Check the adjustment and readjust, if necessary.
starting motor, until the exhaust valves are fully
depressed on the particular cylinder to be timed.
7.
Time the remaining injectors as outlined above.
CAUTION: If a wrench is used on the crankshaft
8.
If no further engine tune-up is required, use a
bolt at the front of the engine, do not turn the
new gasket(s) and install the valve rocker cover(s).
crankshaft in a left-hand direction of rotation or
the bolt will be loosened.
Page 76
