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GRN4-610 Chapter 5: Maintenance 48 of 73
Mounting the TAPER-LOCK tensioning element
Proceed as follows:
• Remove the protective coating from the bore and outside of bushing, and
bore of hub. After ensuring that the mating tapered surfaces are
completely clean and free from oil or dirt. Insert bushing in hub so that
holes line up.
• Sparingly oil thread and point of grub screws, or thread and under head
on cap screws. Place screws loosely in holes threaded in hub, shown thus
in.
• Clean shaft and fit hub to shaft as one unit and locate in position desired,
remembering that bushing will hip the shaft first and then will be
slighting drawn on the bush.
• Using a hexagon wrench tighten screws gradually and alternately to
certain torque.
• Hammer against large-end of bushing, using a block or sleeve to prevent
damage. (This will ensure that the bushing is seated squarely in the bore).
Screws will now turn a little more. Repeat this alternate hammering and
screw tightening once or twice to achieve maximum grip on the shaft.
• If a key is to be fitted, place it in the shaft keyway before fitting the
bushing. It is essential that it is a parallel key and side fitting only and
has TOP CLEARANCE.
• After drive has been running under load for a short time stop and check
tightness of screws.
• Fill empty holes with grease to exclude dirt.
Dismounting the TAPER-LOCK tensioning element
Proceed as follows:
• Slacken all screws by several turns, remove one or two according to
number of jacking off holes shown thus • in the illustration. Insert screws
in jacking off holes after oiling thread and point of grub screws or thread
and under head of cap screws.
• Tighten screws alternately until bushing is loosened in hub and assembly
is free on the shaft.
• Remove assembly from shaft.
Work on the “V” belts
"V"-belts are wearing parts, which stretch and must be re-tensioned. In order to guarantee a
long service life of the "V"- belts, regular checks on the tension force of the "V"-belts and the
condition of the "V"-belts are necessary.
Checking the tension force of the “V” belt