Müthing MU-C/S - Tensioning and Changing Drive Belts

Instruction manual – MU-C/S 45
Always fit new nuts and bolts when changing the cutting flails. Nuts and bolts
are also subject to wear and tear. They can fracture.
Note: Only fit Original Müthing parts, and nuts and bolts. Failure to use original
Müthing spares and attachments will invalidate the warranty.
To prevent being cut by the sharp edges of cutting tools always wear thick gloves and use the
proper tools when replacing the cutting flails.
If your Müthing mulcher is equipped with a scoop flail rotor, you can exchange the “M” scoop flails
for Müthing tungsten carbide flails or vice versa at any time, but you must always change the entire
rotor for a complete set.
Note:
Please note the safety instructions, details of risks and accident prevention
regulations on pages 16 -26!
Tensioning and replacing drive belts
Müthing mulchers generally use drive belts for power transmission as their elasticity alleviates and
smooths out sudden peak loads. Peaks can occur when starting, or encountering debris or large
volumes of dense material.
A drive belt is also a low cost sacrificial item which protects both the machine and tractor from
damage if the mulcher is forced to a halt by an obstruction.
The drive belt must be set to the correct tension so that it can work efficiently without excessive
wear. The drive belt tension is correct when a force of about 6 kg can move the drive belt 10
mm inwards at its central position between the two pulleys. This force is equal to the force that
can be applied by fairly strong arm pressure.
To enable you to check the tension of the drive belt you will find a fairly long narrow aperture and
the symbol 10 on the side in the middle of the drive belt guard.
Please check the drive belt tension daily by feeding the end of a ruler through the opening until it
rests on the drive belt. Continue pressing hard. If you can then push the drive belt about another 10
mm further in with the ruler until the resistance is too great the drive belt tension is correct. If you
can push it any further the drive belts are too slack and must be retightened.
Further signs that the drive belt is too slack are reduced performance, excessive heat, smoke or the
smell of burning rubber coming from the drive belt.
Note:
If smoke comes from the drive belt casing, turn off the mulcher and search for
the cause! There is a risk of it catching fire, which could cause serious damage
to the mulcher.
Müthing MU-C/S mulchers are fitted with a manual drive belt tensioning system. Gearboxes and
drive belt pulleys must be adjusted for this manual drive belt tensioning
.