Thermo King 914970, Manual

Page: 111 / 186

Engine Maintenance
111
4. Check the valve clearance of both valves for
the number 1 cylinder with a feeler gauge. The
valve clearance for both the intake valve and
the exhaust valve should be 0.006 to 0.010 in.
(0.15 to 0.25 mm).
5. Adjust the valves if necessary by loosening
the lock nut and turning the adjustment screw
until the valve clearance is correct.
6. Hold the adjustment screw in place and
tighten the lock nut.
Figure 38: Adjusting the Valve Clearance
7. Recheck the valve clearance.
8. Rotate the engine in the normal direction of
rotation (counterclockwise from the flywheel
end) until the number 3 cylinder is at top dead
center of the compression stroke.
a. Check the rocker arms and push rods on
the number 3 cylinder.
b. If the rocker arms and push rods are loose,
the number 3 cylinder is at top dead center
of the compression stroke.
c. If the rocker arms and push rods are tight,
the number 3 cylinder is at top dead center
of the exhaust stroke. Rotate the engine
360 degrees to place the number 3 cylinder
at top dead center of the compression
stroke.
9. Check and adjust both valves for the number 3
cylinder.
10. Rotate the engine in the normal direction of
rotation (counterclockwise from the flywheel
end) until the number 2 cylinder is at top dead
center of the compression stroke.
a. Check the rocker arms and push rods on
the number 2 cylinder.
b. If the rocker arms and push rods are loose,
the number 2 cylinder is at top dead center
of the compression stroke.
c. If the rocker arms and push rods are tight,
the number 2 cylinder is at top dead center
of the exhaust stroke. Rotate the engine
360 degrees to place the number 2 cylinder
at top dead center of the compression
stroke.
11. Check and adjust both valves for the number 2
cylinder.
12. Install the rocker arm cover.
Belts
Belts should be regularly inspected during unit
pretrip inspections for wear, scuffing or cracking,
and belt tension. Belts that are too loose will
whip, and belts that are too tight put too much
strain on the belt fibers and bearings.
NOTE: Do not attempt to remove or install belts
without loosening adjustments. Belts that are
installed by prying will fail prematurely due to
internal cord damage.
CAUTION: Do not attempt to adjust belts
with the unit running.
CAUTION: This unit is equipped with
Auto Start. It will start automatically if the
O
N
key is pressed while the On/Off
switches are in the On position. Units with
the CYCLE-SENTRY option start
automatically in both the
CYCLE-SENTRY mode and the
Continuous Run mode. Make sure to press
the
O
FF
key or place an On/Off switch in
the Off position before performing any
maintenance or repair procedures.