Thermo King UT-1200, Manual

Page: 102 / 169

Engine Maintenance
102
6. Energize the fuel solenoid and the fuel pump
by turning the unit On (or using the Service
Test Mode, see the appropriate
Microprocessor Diagnostic Manual).
7. Rotate the engine backwards
(counterclockwise viewed from the water
pump end) until the injection timing mark is
positioned about 1.0 in. (25 mm) below the
timing mark on the starter mounting plate.
8. Use a clean towel to remove the fuel from the
top end of the delivery valve holder.
9. Slowly turn the engine in the normal direction
of rotation until you see the fuel rise in the end
of the delivery valve holder. Stop as soon as
you see the fuel rise.
10. Check position of the timing marks. The 16
degrees BTDC timing mark on the flywheel
should be aligned with the timing mark on the
starter mounting plate. Repeat steps 7 through
10 to recheck the timing.
11. If the timing is off by more than 1 degree (0.1
in. [2.5 mm]), loosen the mounting nuts on the
studs that fasten the injection pump to the
engine and rotate the injection pump to change
the timing.
a. Pull the top of the injection pump away
from the engine to advance the timing.
b. Push the top of the injection pump toward
the engine to retard the timing.
12. Tighten the injection pump mounting nuts and
recheck the timing. Repeat steps 7 through 12
until the timing is correct.
13. Install the delivery valve spring for the
number one cylinder by removing the delivery
valve holder, installing the delivery valve
spring, and then reinstalling the delivery valve
holder.
14. Install the injection line for the number one
cylinder, the cylinder head cover, tighten the
other injection lines, and reconnect the 8S
wire to the starter solenoid when finished with
the procedure.
1. Delivery Valve Holder
Figure 171: Injection Pump
1
1. 16 Degrees BTDC Mark (Correct Timing Mark)
2. 20 Degrees BTDC
3. 15 Degrees BTDC
4. Index Timing Mark on Starter Mounting Plate
Figure 172: Correct Injection Timing Mark
Alignment
1 4
3
2