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Engine Maintenance
72
Adjust Engine Valve Clearance
1. Remove the valve cover. Torque 18 mm
diameter head bolts prior to adjusting the
valves: 26.8 ft-lb (36.3 N•m). Valve clearance
should be checked after every 2000 operating
hours, maximum. It is very important that
valves be adjusted to the correct specifications
for satisfactory engine operation. Insufficient
valve clearance will result in compression loss
and misfiring of cylinders resulting in burned
valves and seats. Excessive valve clearance
will result in noisy valve operation and
abnormal wear of the valves and rocker arms.
The intake and exhaust valves are adjusted
with the valve in the closed position.
2. The intake valve and exhaust valve are
adjusted to 0.006 to 0.010 in. (0.15 to 0.2 mm)
with the temperature at 70 F (21 C).
Turn the engine by using the belt on the
crankshaft pulley. Rotate the engine in the
direction of rotation (clockwise as viewed
next to the flywheel) from the water pump
end.
a. Turn the engine so number 1 cylinder is on
compression with piston to TDC. Both
push rods should turn freely. Adjust both
valves on number 1 cylinder.
b. Revolve the crankshaft 240° to TDC mark
on number 3 cylinder, and adjust both
valves.
c. Turn the crankshaft 240° to align TDC
mark of number 2 cylinder, and adjust
both valves.
d. Be sure to tighten locking nut while
holding the ball head screw in position.
3. Install the valve cover making sure that the
gasket is in position.
Fuel Limit Screw
The fuel limit screw is not adjustable. It is
equipped with an anti-tamper cap to fulfill
requirements for CARB (California Air Resources
Board) emission regulations. Service technicians
must be CARB certified to perform service on
fuel limit screw for equipment operating in
California. All other equipment can be serviced
per recent service bulletins with special tools and
procedures. California service technicians should
see your local Thermo King dealer for recent
bulletins.
CAUTION: Make sure the fuel rack is off
to prevent the engine from starting.
Summary of Contents for 919180
Page 4: ...4...
Page 10: ...Table of Contents 10...
Page 32: ...Unit Description 32 Unit Photographs Figure 3 Front View Figure 4 Back View AJA584 AJA585...
Page 33: ...Unit Description 33 Figure 5 Left Side View Figure 6 Right Side View AJA586 AJA58...
Page 35: ...Unit Description 35 Figure 8 North American Power Receptacle Box AJA58...
Page 38: ...Unit Description 38...
Page 58: ...Electrical Maintenance 58...
Page 66: ...Engine Maintenance 66 Figure 37 Fuel and Oil System Components...
Page 84: ...Engine Maintenance 84...
Page 96: ...Refrigeration Maintenance 96...
Page 118: ...Hilliard Clutch Maintenance 118...
Page 136: ...Cycle Diagrams 136...
Page 140: ...Wiring and Schematic Diagrams Index 140...
Page 141: ...141 Truck S Model SR 30 Schematic Diagram Page 1 of 2...
Page 142: ...142 Truck S Model SR 30 Schematic Diagram Page 2 of 2...
Page 143: ...143 Truck S Model 30 Units with P T Wiring Diagram Page 1 of 2...
Page 144: ...144 Truck S Model 30 Units with P T Wiring Diagram Page 2 of 2...
Page 145: ...145 Truck S Model 50 Schematic Diagram Page 1 of 2...
Page 146: ...146 Truck S Model 50 Schematic Diagram Page 2 of 2...
Page 147: ...147 Truck S Model 50 Units with P T Wiring Diagram Page 1 of 2...
Page 148: ...148 Truck S Model 50 Units with P T Wiring Diagram Page 2 of 2...