TRIMMER-50
TRIMMER-60
21
The replacement procedure is as follows:
a)
Drain
petrol from the engine tank. Dismount the accelerator lever (2x spanner No.
8) from the handlebars.
Bowden cable should never be dismounted from the
control on the engine!
b)
Unscrew three safety nuts (spanner No. 13) on the engine flange and pull the engine
out from the machine frame upwards. Never use force to pull the engine
from the
frame!
! Never put the engine on the side. Oil might get into the exhaust or into the air
cleaner. The best engine seating is with the lower flange dwelling on two lintels
which are at least 7 cm high.
c)
Dismount the upper casing (spanner No. 8, spanner No. 13). Dismount the bolt in
front of the driven belt pulley (spanner No. 10). Take the old V-belt off and replace
it with a new one. V-belt marking is GATES A52 BareBack.. It is also possible to
use an equivalent V-belt made by other manufacturers at a size of A13x1320 Li
(Li=internal belt length). However, the belt must be made without rubber on belt
sides! Only this belt model will guarantee that the string head drive start will be
continuous at engaging the clutch.
! Should a different belt model be used, the machine manufacturer does not bear
any liability for the correct and full functioning of the gear and for damage caused
by the incorrect belt type!
d)
Put the engine back to its place, slide the belt into the groove in the belt pulley on
the engine and check if the belt passes correctly around the guides. Screw the engine
by using three safety nuts with flat washers. Screw the accelerator lever back onto
the handlebars.
e)
Check the operation of the tightening pulley. With the horizontal bar on the
handlebars being completely pressed down, the pulley must ensure a sufficient belt
tension (spring on the litz wire being extended by about 10 mm as compared with
the normal condition). Possible corrections are to be made by means of the
adjustment bolt (see Fig.14). Use two spanners No. 10 or No. 9. With the lever
switched off, the pulley must be leaning against the stop on the engine plate (Fig. 15
top) and the litz wire in the Bowden of the tension pulley can be slightly slack. In
the case that the adjustment bolt is completely unscrewed and it is necessary to
tighten the V-belt, the spring on the cable can be hooked into the front hole on the
tension pulley arm and to set-up the belt tension once again.
f)
Screw the bolt back in front of the driven belt pulley and mount back the upper
casing.
