Maintenance RD 7
46 wc_tx000295gb.fm
5.7 Checking and Adjusting Valve Clearances
See Graphic: wc_gr001353
Stop the machine, apply the parking brake and switch off the engine.
5.7.1 Make sure that the compression lever is in position “0”. See section
Starting the Machine.
5.7.2 Remove the cylinder head cover and the gasket.
5.7.3 Turn the engine over in the normal direction of rotation until
compression is felt.
5.7.4 Check the inlet valve clearance between the rocker and the valve stem
using a feeler gauge (a).
5.7.5 If the valve clearance is incorrect, loosen the hex nut (c).
Note: See section Technical Data for valve clearances.
5.7.6 Turn the adjusting screw (b) with a screwdriver until the feeler gauge
(a) can just be pulled through between the rocker and the valve stem
with slight resistance to its movement after the nut (c) has been
retightened.
5.7.7 Repeat this adjustment with the outlet valve.
5.7.8 Place a new gasket under the cylinder head cover, reinstall the
cylinder head cover, and tighten down the screws uniformly.
5.7.9 Run the engine briefly and make sure that the cylinder head cover is
not leaking.
a
b
c
wc_gr001353
a
b
c
d
e
f
g
wc_gr001352
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