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6 Maintenance
Checking valve clearance
Every 1500 operating hours.
• Place the angle gauge with the key socket
on the adjusting screw.
• Fix the magnet of the angle gauge.
• Turn the angle gauge in a clockwise directi-
on until it is seated (rocker arm has no play)
and turn the scale to zero.
Determine which cylinders should be adjus-
ted from the setup chart:
Valve overlap
Setting the cylinder
1
4
3
2
4
1
2
3
Valve overlap
Setting the cylinder
1
6
5
2
3
4
6
1
2
5
4
3
VD4
VD6
Valve clearance
IN
Inlet valve
75° +10°
EX
Exhaust valve 120° +10°
• Rotate the angle gauge anticlockwise until
you reach the specified rotational angle:
Summary of Contents for D-LINE VD4.120
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