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English
Maintenance Major 4S PTO
• During maintenance work, the propeller shaft must always be disconnected; this is also a
requirement in order to remove the protective plate and access the clippings chamber.
Belt tension adjustment
• In order to adjust the belt tension, the protective plate must be
adjusted. Unhitch the lever (1) and undo the star-screw (2) on
the protective plate in order to release the protective plate.
• The protective guard must also be removed. To do so, the 4
M6 bolts (without nut) must be unscrewed. The cap is also fixed to the chassis with an M6 bolt
which has a cap nut and an M8 bolt at the front of the cap. Two ring spanners (10 mm and 13
mm) are required for this.
• In order to check the exact belt tension, a weight of 7.5 kg must be hung on the V-belt. If the
belt sags 1 cm, the belt tension is correct.
• Tension the belt by sliding the flat plate on the chassis forwards.
The plate bolts must be unscrewed in order to do so (2 x ring spanners
13).
• Before unscrewing the machine, a felt-pen must be used to make two
points on the chassis plate. This will save time afterwards when lining
up the pulleys.
• If the correct tension and alignment is achieved, the plate can be locked by re-tightening the
bolts (M8) (2 x ring spanner 13).
• Only once everything has been checked carefully can the protective cap be replaced in its
original position.
• Replace the protective plate and tighten the button on the back sufficiently to avoid
overloading the coupling mechanism.
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