Nanni T4.155 seriers, Руководство по ремонту

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60300140 (
indice A
) 4 CYLINDERS WORKSHOP MANUAL 21/191
CHECKING AND ADJUSTING VALVE CLEARANCE (ENGINE COLD)
1. REMOVE THE ROCKER COVER
Remove the ten assembly bolts, the two attachment nuts, the rocker cover and
the gasket.
CYLINDER No.4 IS ON FLY WHEEL SIDE
2. PUT CYLINDER No.4 IN TOP DEAD POSITION
a. Turn the crankshaft clockwise and make the notch in the timing cover coincide
with the pulley timing indicator.
b. Check that the No.4 cylinder valve lifters include a clearance whereas the
No.1 valve cylinder lifters are blocked.
Otherwise, turn the crankshaft one complete turn (360°) to make the indicator
mentioned above coincide.
3. MEASURE THE VALVE OPERATING CLEARANCE
a) Only measure the clearance of the valves illustrated on the illustration
opposite.
- Only measure the clearance between the cam shaft and the valve lifter.
- Record the clearance when it is not within the limits complying with
specifications. This information will be used later to choose the set of
thickness shims needed to correctly adjust the clearance
Valve clearance (cold):
Intake: 0.20 – 0.30 mm
Exhaust: 0.25 – 0.35 mm
b) Turn the crankshaft pulley for one complete rotation (i.e. 360°) and make
the advance setting marks coincide using the method indicated above