Stiga PARK 121 M - Manual (Page 5)

6
ENGLISH GB
- item no. 13-2915 has seventeen fixed positions
for cutting height.
- item no. 13-2921 has continuously variable
adjustment of cutting height.
Note: Stated cutting heights apply when the
machine is on a firm surface.
CUTTING TIPS
For optimum ‘Multiclip effect’, follow these tips:
- cut frequently.
- run the motor at full revs.
- keep the underside of the cutting deck clean.
- use sharp blades.
- do not cut wet grass.
- cut twice (with different cutting heights) if
the grass is long.
MAINTENANCE
PREPARATIONS
Unless otherwise stated, all service and
maintenance must be carried out on a stationary
machine when the motor is not running.
Prevent the machine from rolling by
always applying the parking brake.
Prevent unintentional starting of the
motor by always stopping the motor,
disconnecting the spark plug cable
from the spark plug and earthing it.
Disconnect the negative cable from the
battery.
MAINTENANCE TIPS
To make cleaning and maintenance easier, the
cutting deck can be folded up:
1. Set the cutting height setting to an intermediate
position (= drive belt minimum tension).
2. Lift up the deck with the tool lift.
3. Unhook belt idler spring H (fig. 7).
4. Force the belt off the centre pulley F.
5. Undo both pins J (fig. 9).
6. Grip the deck’s frame (fig. 10).
7. Fold up the deck until it is upright on the rear
support plates (fig. 11).
CLEANING
After each use, the underside of the cutting deck
should be rinsed off.
If the grass has dried solid, scrape clean the
underside.
If necessary, paint the underside to prevent
corrosion.
POSITIVE DRIVE BELTS
If one of the blades has struck a solid object (e.g. a
stone), the belt tension may be altered. This can
lead to the positive drive belt ‘over-meshing’
which, in the long term, can damage the blades.
Adjust the belt tension if necessary:
1. Unhook belt idler spring H (fig. 7).
2. Force the belt off the centre pulley F.
3. Dismantle the transmission cover.
4. Undo tensioning arm K (fig. 12).
5. Undo the bearing box’s mounting screws L (fig.
13).
6. Tension the positive drive belt by pressing the
tensioning arm backwards.
7. Tighten the tensioning arm’s mounting screw.
8. Tighten the bearing box’s mounting screws.
9. Repeat with the other positive drive belt.
When replacing positive drive belts,
ensure that both the outer blades are
always at right-angles to the central
blade (see fig. 14).
If the positive drive belts are incorrectly mounted,
the blades will strike each other because they
overlap.
Always check the position of the blades after
replacing a belt or adjusting belt tension.
REPLACING BLADES
Use protective gloves when changing
blades to avoid cutting yourself.
Ensure that the blades are always sharp. This
produces the best cutting results.
Always check the blades after a collision. If the
blade system has been damaged, defective parts
should be replaced.