Operation
5
Bush Replacement
For pivots using hardened steel pins and
bushes, follow the procedure below:
Removal and installation of the bush must be
done as follows:
1. Remove worn bush from its housing.
2. Check for damage, clean and degrease
the housing internal diameter and the new
bush external diameter with a contact cleaner
or Loctite 770.
3. Allow to dry.
4. Apply a light coating of Loctite 620 or similar
retaining compound to the leading chamfered
edge of the replacement bush external diame-
ter only.
5. Press fit into housing until flush.
Important: Take extreme care not to damage
or remove the inner surface of the bush. En-
sure no adhesive contacts the
bush’s inner
surface.
Tyre/Bearing Replacement
The Manutec presswheel fitted to the Paral-
lelogram consists of a split aluminium rim, a
rubber tyre, two sealed deep groove ball
bearings, steel seals, bushings and fasteners.
A long service life, without the need for relu-
brication, adjustment or any other mainte-
nance can be expected. In the event that a
failure occurs, follow the following instruc-
tions for replacement of the bearings or press-
wheel tyre.
Disassembly instructions
1.
Remove wheel/tyre assembly from the
Parallelogram by removing the M16 axle
bolt.
2.
Remove the M10 fasteners holding the
two halves of the aluminium rim together.
3.
Disassemble the two rim halves and the
tyre.
4.
Sitting the rim halves on two blocks of
wood, inside facing upwards, use a punch
on the bearings
outer
race to remove the
bearings, seals and bushings if required.
5.
Inspect all components and replace as nec-
essary.
Assembly instructions
1.
Placing the rim halves inside down on a flat
surface, use a suitable tool to press/punch
in the bearing by its
outer
race.
2.
Fit flat washer and steel bush.
3.
Use a suitable tool to press/punch in the
metal seal
.
4.
With the presswheel tyre between the two
rim halves, torque M10 fasteners to
60N.m.
5.
Replace assembly and secure M16 axle
bolt tightening only enough to prevent ro-
tation.
