Claas LEXION 480, Repair Manual

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7.2.6
RHB LEXION 480 - 188 678.1
Left-hand drive belts
Bolt the hex. bolts (B) through the threaded holes in
the front pulley half against the rear pulley half until the
stop. This blocks the variable speed pulley in a spread
position.
Remove the hydraulic hose from the hydraulic cylinder
and pull the hydraulically variable pulley open. Collect
the oil flowing out of the cylinder. Now remove the
belt (3) from both pulleys.
(Fig. 10, 12)
Installing and adjusting the cutterbar
variable-speed drive belt (3)
If the variable-speed belt is not sufficiently tensioned
any more at the lowest feed rake speed due to belt
growth or wear, this condition is compensated using
washers – see detail (A).
Unscrew the three countersunk head bolts (F) and
remove hydraulic cylinder (Z).
Place one washer (G) 26 x 42 x 3 each on the spacer
tubes (X) below the flange of the hydraulic cylinder (Z)
and refit the hydraulic cylinder (Z).
CAUTION!
Ensure absolutely that all three washers are
placed on the spacer tubes and will not be
pinched between the pipe ends and the cylinder
flange.
When installing a new variable-speed belt,
these washers (G) must be removed.
Firmly pull the belt between the pulley halves and
unscrew the hex. bolts (B) from the threaded holes.
Re-fit hydraulic hose.
Re-fit guard (S).
Check oil level and replenish if required.
(Fig. 10, 11, 12, 13)
12
13