Operation

Menzi Muck A61
10 Operation traction drive
10.1 General
10.1.1 Traction drive
The machine is driven via the rear wheels (4x2) or all wheels (4x4) using two (four) hydrostatic wheel hub
drives with hydraulic differential locks. The wheel hub drives are equipped with an automatic parking
brake. The spring pressure disk brake is a safety brake that is always closed by compression springs.
It is opened by the supply of pressurised oil. The brake does not need to be adjusted, and thus is also
maintenance­free.
10.1.2 Shut-off equipment
Decoupling: Free the wheel from the base by lifting it. Using a hexagon socket
screw key, turn the bolting device in the direction of the arrow as far as it will
go.
Coupling: Free the wheel from the base by lifting it. Using a hexagon socket
screw key, turn the bolting device in the direction opposite the arrow while
slowly turning the wheel. As soon as resistance is felt, the gearwheels catch in
the transmission, and the bolting device must be screwed in as far as it will go
(approx. 6 rotations).
Decoupling of the bolting device leads to brake loss. The excavator must be properly secured
from rolling off.
10.1.3 Ridduttori traction drive cut-out
The transmission can be uncoupled. The figure
to the right shows the coupling and uncoupling
operations. Screwed on to the centre of the wheel
gear is a cover with a recess, which operates
an actuating bolt. When coupled, the cover is
positioned with the recess pointing outwards, when
uncoupled, the recess points inwards.
10.1.4 Tow
The operating bolt must engage, rotate
wheel slightly if necessary.
When being towed, the hydraulic engine must be disconnected from the transmission using the built­in
mechanical switch­off device to prevent overspeeding of the hydraulic engine and the resulting damage.
The speed must be adapted to suit the conditions, although must not exceed 20 km/h.
The Menzi Muck A61 Mobil (4x2) may only be towed with max. 10 km/h.
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