Great Plains P14175 Serial No 12213 to 12723 - Manual (Page 30)

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Operating Instructions
30
5. Servicing and
Maintenance
Follow the safety instructions for
servicing and maintenance.
5.1 Servicing
Your machine has been designed and
constructed for maximum performance,
operational efficiency and operator
friendliness under a wide variety of operating
conditions.
Prior to delivery, your machine has been
checked at the factory and by your authorised
dealer to ensure that you receive a machine
in optimum condition.
To ensure trouble-free operation, it
is important that servicing and
maintenance work is performed at
the recommended intervals.
5.2 Cleaning
In order to ensure that the machine is always
in operating condition and to achieve
optimum performance, perform the cleaning
and servicing work at regular intervals.
Avoid cleaning the roll / disc bearings with a
high- pressure hose or a direct water jet. The
housing, screwed connections and ball
bearings are not watertight.
5.3 Disc Hub Maintenance
5. Servicing and Maintenance
Grease every disc hub until grease
shows from the seals according to
the lubricating intervals outlined on
page35.
Check disc hubs regularly for
tightness.
Regularly examine hub caps,
seals, shear and pivot bolts and all
tracking bolts for tightness and
effectiveness twice weekly or every
50 working hours (whichever is
more frequent).
1 Ensure that the bearing seal is in the
correct orientation when replacing /
assembling components.
2 Ensure that the spindle is free from dirt
and the nut and outer bearing can easily
slide on it.
3 Tighten the crown nut with a hand
spanner (a torque wrench is not
required) while turning the hub
clockwise until the bearing drags slightly
(you feel the hub turning heavily). Some
resistance will be due to friction from the
seal.
4 Turn back the crown nut to the next
locking position. Even if the tightening
of the nut has reached an exact fixing
position, turn it back.
5 Insert the retaining pin and hook the bow
spring in the groove of the crown nut.
6 Try to shake/rock the outer edge of the
hub/spindle: play of 0.1 / 0.2mm will not
reduce the bearings’ life and, in addition,
prevents overheating. If the adjustment
is correct the hub should turn freely with
the only friction being from the seal.
5.3.1 Tightening Disc Hubs
Fig. 4.05: Disc Bearing Assembly