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Checking the cutting unit’s parallelism
Check the parallelism of the cutting unit as follows:
1. Check the air pressure in the tyres 60 kPa
(0.6 kp/cm
2
/8.5 PSI).
2. Place the machine on a level surface.
3. Put the lifting lever in the mowing position.
4. Measure the distance between the ground and
the front and rear edges of the cutting unit hood.
The cutting unit should slope forwards slightly
so that the rear edge is 2-4 mm (1/8") higher
than the front edge.
MAINTENANCE
Adjusting the parallelism of the cutting
unit
1. Remove the front hood and right-hand fender.
2. Undo the nuts on the lift strut.
3. Screw out (extend) the stay to raise the rear
edge of the cover.
Screw in (shorten) the stay to lower the rear
edge of the cover.
4. Tighten the nuts after adjustment.
5. On completion of the adjustment the unit’s
parallelism should be re-checked.
6. Fit the right-hand fender and the front hood.
Replacing the cutting unit belts
Belt replacement on the Combi 103, 112 cutting
unit
On these cutting units with “collision-proof” blades,
the blades are driven by one V-belt. Do as follows to
change the V-belt:
1. Remove the cutting unit.
2. Undo the bolt on the lift strut and the two screws
on the cover. Lift the cover off the cutting unit.
3. Loosen the spring (4) that tensions the V-belt
and pry off the belt.
Simply reverse the procedure to fit the new belt.