Beta RR 4T-250, Руководство по ремонту

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65
6 - Motor
Release 00 Date 02/2005
Fitting the cylinder head top
– Clean or degrease the sealing surfaces of the cylinder head
top and the cylinder head itself.
– Insert the centring bushes in the cylinder head.
– Apply a thin film of sealant (Three Bond) over the cylinder
head sealing surface.
– Carefully position the cylinder head top and tighten the screws
to 10 N·m. For the screw lengths, refer to the diagram.
NOTE:
– Fit the M6x75 screw with a new copper ring 6x10x1.
M6x...
30
30
75
45
55
55
50 45
NOTE: The dia-
gram shows the
lengths of the
cylinder head
c l a m p i n g
screws.
– Before tightening the screws, check and if necessary adjust
the axial play of the rocker arms.
– To this end, insert a thickness gauge 1 ( & 0.05 mm) between
the terminal and the rocker arm. Push in the terminal and
tighten the screw next to the terminal.
– Tighten the other screws to 10 N·m following a crosswise pat-
tern.
Rocker arm axial play: 0.02 - 0.10 mm
Fit the fitting cap, grease the O-rings and fit the seal holder so
that its abutting end faces the camshaft gear.
TO AVOID DAMAGING THE OIL SEALS, BE SURE TO
USE THE FITTING CAP.
The seal holder has a drain hole. Fit the seal holder with the hole
facing upwards.
– Remove the fitting cap, insert the roller into the camshaft and
fit the water pump impeller with the Seeger ring.
– Fit the water pump cover with a new seal. Tighten the screws
(M8x20) to 8 N·m following a crosswise pattern.
1