Laski VD 500, Operating Instructions Manual

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- For proper belt tension first check up also alignment of pulleys (their faces).
Align the pulleys (their faces) by means of a straight-edge rule. Pay your
attention to this alignment also after any engine displacement.
At reassembly do not confuse the RH side pulley (engine) with the LH
side pulley (fan). Fix each pulley by its fixing bolts with torque of 80 Nm.
While tightening the belts proceed as follows:
- Check up tension of new belts after the first 5 service hours and afterwards always
in intervals of 50 hours
Excessive creeping or tension (or improper alignment of pulleys)
will wear out the belts and the pulleys prematurely with negative impact on the belt life.
-
- 1 – driving pulley on
engine
-
2 – driven pulley
- 3 – straight-edge
rule
- Align the pulleys
(their faces) by means
of a straight-edge rule
starting as from the
lay-shaft pulley, go on to the engine driving pulley and finally to the fan driven
pulley. Max. inclination/deflection allowed on the engine pulley and on the fan
pulley should be less than 1 mm.
If this inclination found on the driving pulley and on the driven pulley exceeds this
limit value, proceed as follows (on the driving pulley):
-
Loosen four fixing bolts on the engine (1 - 4x) by 0,5 – 1 turn to let the engine
slide on the frame.