15
NOTE!!! Damage or wear of at least one knife makes it necessary to replace the whole set
of knives as only then working drum will be balanced. Use approved knives only. Knifes
worn on one side (with only one blunt edge) can be installed again on adjacent disc (with
opposite rotation direction) provided they are not damaged and have the same weight.
Worn or damaged (broken, deformed) holders and knives must be replaced. Recovery of
knives and holders using any methods, is forbidden. Limit wear of holder mandrel head
(reduction in diameter in knife mounting point) up to 25% is acceptable. Holder with loose
mandrel mounting in the plate, should be replaced.
When replacing holders (knives), pay attention to their position in relation to each other
(alternating) on each disc. Correct installation of holders (knives) is presented in Fig. 15.
Fig. 15. Correct alternating installation of holders (knives) on working discs
7.2. Tightening V-belts
The mower is equipped with spring V-belt tensioner which is fitted with spring tensioning
indicator (3) (Fig. 16). Belts are properly tensioned if gap between indicator (3) and tensioner bracket
surface (4) (dimension S) is 0.5 - 3 mm. In case of damage or elongation of at least one belt (in order to
keep equal length) always replace the whole set of belts (all pcs with the same dimension marking and
trademark).
Fig. 16. V-belt tightener: 1 - adjustment nuts, 2 - tightener spring, 3 - tightener indicator bar, 4 -
tightener bracket, S (dimension) = 0.5-3 mm.
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