Thermo King UT-1200, Manual

Page: 101 / 169

Engine Maintenance
101
Injection Pump Timing
This is the only timing procedure for this engine.
It is not necessary to check the individual cylinder
timing.
1. Remove the injection line for the number one
cylinder from the delivery valve on the
injection pump and from the injection nozzle.
NOTE: The number one cylinder is the
cylinder at the flywheel end of the engine.
2. Remove the delivery valve spring for the
number 1 cylinder by removing the delivery
valve holder and the delivery valve spring,
and then reinstalling the delivery valve holder
without the delivery valve spring in place.
3. Remove the cylinder head cover (valve
cover/intake manifold assembly).
4. Place the engine at top dead center of the
compression stroke for the number one
cylinder. Refer to steps a through d.
a. Rotate the engine in the normal direction
of rotation (clockwise viewed from the
water pump end) until the number one
TDC mark on the flywheel lines up with
the timing mark on the starter mounting
plate.
b. Check the rocker arms on the number one
cylinder to see if they are loose.
c. If the rocker arms are loose, the engine is
at top dead center of the compression
stroke for the number one cylinder.
d. If the rocker arms are tight, the engine is at
top dead center of the exhaust stroke for
the number one cylinder. Rotate the engine
360 degrees to place the engine at top dead
center of the compression stroke for the
number one cylinder.
5. Disconnect the 8S wire from the starter
solenoid to prevent the engine from cranking
when the unit is turned On.
CAUTION: The cylinders on the engine
are numbered from the flywheel end to the
water pump end. The number 1 cylinder is
next to the flywheel. The number 2
cylinder is the center cylinder. The
number 3 cylinder is next to the water
pump. The timing marks on the flywheel
are matched to this system.
1. Number One Cylinder Injection Line
2. Timing Mark
Figure 169: Component Location
CAUTION: Loosen all of the injection
lines at the injection nozzles to prevent the
possibility of the engine firing while it is
being rotated.
1
2
1. Injection Timing Marks
2. Top Dead Center Mark for Number 1 Cylinder
3. Index Timing Mark on Starter Mounting Plate
Figure 170: Timing Marks
2
3
1