Thermo King SB-190 30, Manual

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Engine Maintenance (Rev. 12/03)
49
ADJUSTING ENGINE VALVE CLEARANCE
1. Remove the valve cover. Torque the cylinder head bolts
to 85 N•m (63 ft-lb) before adjusting the valves.
It is very important that the valves be adjusted to the
correct specifications for satisfactory engine operation.
Insufficient valve clearance will result in compression
loss and misfiring 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 valves closed.
2. The valves are adjusted to 0.4 mm (0.016 in.). When
the right gap is obtained, MAKE SURE to tighten the
lock nut while holding the adjusting screw in position.
Turn the engine using a wrench on the front crankshaft
bolt.
CAUTION: Remove the wire from the fuel
solenoid to prevent the engine from starting.
Front Rear
Cylinder No. 1 2 3 4
Valve arrangement E I E I E I E I
Piston in No. 1 cylinder is at
TDC on compression stroke
Piston in No. 4 cylinder is at
TDC on compression stroke
Valve Adjustments and Cylinder Configurations
Valve Adjustments