Stiga 121 M Maintenance, Cutting Height, Cutting Tips, Cleaning, Positive Drive Belts, English

GB ENGLISH

USE

CUTTING HEIGHT

The cutting height can be varied from 30 to 80 mm.

-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.

6.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.Secure the tensioning arm on the hook.

2.Force the belt off the centre pulley F.

3.Dismantle the transmission cover.

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.

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.

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.Secure the tensioning arm on the hook.

3.Force the belt off the centre pulley F.

4.Undo both pins J (fig. 9).

5.Grip the deck’s frame (fig. 10).

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.

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