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8
The roller should be positioned with the appropriate section beneath the crane
- preferably coupled to a tractor, otherwise, a hydraulic pump with a single-
acting and a double-acting valve is needed. It must be able to deliver a
pressure of at least 170 bar. Connect the opposite section to the guide over the
transport bearing so that it can still be moved up and down. Using the single-
acting valve, lift the side sections clear of the transport bearing. Use the
double-acting valve to swing the side section concerned about 1 m out from
the side.
Start carefully with two chains/slings around the rings about 1 m apart. Lift
until the chains/slings are taut. Thoroughly loosen the bearing nuts. Lift with
the crane until the screws are loose. Remove them and the whole shaft can be
manoeuvred out.
Clear all grease from the bearing housings. Remove any burrs on the
protruding shaft end with a file. Loosen the pointed screws in the bearings;
the bearings can then be pulled out.
When the stop ring with the two pointed screws has been removed, the
roller rings can be pulled off the shaft.
MOUNTING:
Cambridge rings. Start with a smooth ring with the "nose" pointing inwards
(see fig. 3). This is followed by a serrated ring with the smooth side facing
outwards. This must be pushed right over the boss ("nose") of the smooth
ring. Fill the shaft up in this way until a space of about 12 cm remains. Omit
the last serrated ring. Ensure that the rings are packed tight together.
Fig. 3:
Roller centre
Crosskill rings. Note the direction of rotation of the shaft.
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