Thermo King MD-MT, Operator'S Manual

Page: 97 / 192

Engine Maintenance
97
10. When the injection pump has been correctly
timed to the engine, remove the pump and put
a light coat of silicone gasket sealer on the
shim pack and the pump, or dip the new shims
in lacquer thinner to activate the sealer.
11. Reinstall the pump, and torque the nuts to 18
to 20 ft-lb (24 to 27 N•m).
12. Reinstall the delivery valve and spring.
Torque the delivery valve holder to 30 ft-lb
(41 N•m).
13. Reinstall the injector lines, bleed the air from
the nozzles, and test run the engine.
Timing Individual Cylinder Injection
This procedure should be used when a poor
running engine has had all possible problems
checked but continues to run badly. If the
injection pump has been repaired or replaced, the
chance of individual cylinder timing problems has
a greater possibility of occurring.
To check individual cylinder timing, follow the
pump timing procedure but instead of changing
shims to adjust pump timing, check the timing of
number 2 and number 3 injector to the engine
after checking number 1. The cylinders should
time on their respective flywheel timing marks.
If the injection pump plungers are not correctly
timed to each other, the pump must be removed
and sent to a diesel injection equipment repair
shop for calibration.
NOTE: The order of the flywheel timing marks
is 1, 2, 3, but the firing order is 1, 3, 2. This is
because the engine fires every 240 degrees of
crankshaft rotation. Therefore, when checking
individual cylinder timing check number 1 first
then rotate the engine past number 2 to number
3 and check number 3. Then rotate the engine
past number 1 to number 2 and check number 2.
1. TDC Mark
2. Injection Timing Mark
3. Round Notch
4. File V-Notch Here
5. Timing Mark
Figure 49: Timing Marks