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Never mow with a damaged knife. Have a dulled knife sharpened and balanced at a service agency. Replace a
heavily damaged knife with a new, original part supplied by the manufacturer.
2. Tensioning of the drive system belt and inspection of the belt tension gear of the mulching knife drive.
Dismantle the lower cover (5), loosen two nuts (2), the engine contracting flange and the stretcher (4) and stretch the
drive belt (9) by the nut (3). Tighten so that the belt slack is 10 15 mm and the knife drive belt (8) stays loose. Perform
assembly in reverse order of Fig. 7.
Remove the plastic cover shielding the front mulching machine part. Check correct adjustment of the rotor drive belt
stretching pulley toward the mulching machine case regularly once a month. When placing a ruler to the upper case borehole
area, Fig. 9, the upper pulley edge has to be approx. 8 mm below the upper case plane. Adjustment is performed by
mechanical clinching. When the lever on the right handlebar is completely pressed, the pulley has to sufficiently stretch the
belt (the spring on the string has to be sprung by approx. 2 mm compared to the released state). Eventually, you can adjust
tension by an adjusting screw (1), Fig. 5, and the bolt in the upper handlebar part.
3. Drive String Adjustment
Adjust the drive string so that it is not strung when the left-hand side lever on the handlebar (1), Fig. 3, is released.
Adjustment may be performed by an adjusting screw (2), Fig. 5, and the adjusting screw in the upper handlebar part.
4. Belt Replacement
Remove the plastic cover of the mulching machine. Dismantle the lower cover, the vee-belt stretcher and remove the
belts from the belt pulley. Remove the engine. Dismantle the belt pulley on the mowing knife shaft and pull out the belts
from the case.
Perform assembly in reverse order.
Stretch the drive belt according to Chapter VI/2. Before remounting the plastic cover, check the stretching pulley operation
according to Chapter VI/2.
When replacing belts of the mowing knife drive performing the clutch function, only an original belt may be used,
supplied by the manufacturer or mounted by a service agency. When using a different belt, the manufacturer does not
guarantee correct drive function.
5. Engine
Abide by the instructions for use of the given engine during engine operation.
6. Gear-Box
The drive gear-box is filled with a permanent filling of class SAE 90 gear oil. When cleaning the machine, we
recommend performing an inspection whether the oil does not leak out of the gear-box. Inspection is performed by means of
two sight holes in the rear case part (6), Fig. 7. In case you should determine oil leakage, it is necessary to replace worn-out
shaft packing rings. We recommend performing replacement at an authorized service point. Adjustment of the drive clutch is
described in Chapter VI/3.
7. Machine Lubrication
At the end of a season, dismantle the drive wheels from the axle, clean these and fill the nave core with a new plastic
lubricant filling. Also lubricate the wheel front with balls and the free-wheel surfaces (4), Fig. 6. When re-mounting, do not
fully tighten the nut, the wheel has to turn with little clearance. Secure the nut with a new pin. Lubricate the stretching pulley
journal, Fig. 9, with a forced-feed lubricator.
Lubricate cables with silicone oil.
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