SERVICING YOUR SUPERBRUSH 21
Conveyor Belt Tension: To adjust the tension of
the conveyor belt, first adjust the take-up screw
nut (Fig. 21) on both sides of the conveyor to
obtain approximately equal tension on both sides
of the belt when taut. Insufficient belt tension will
cause slippage of conveyor belt on the drive roller
during sanding operation. The conveyor belt is too
loose if it can be stopped by hand pressure applied
directly to the top of the conveyor belt. Excessive
belt tension can result in bent rollers, premature
wearing of the bronze bushings or conveyor belt
Conveyor Belt Tracking: Belt tracking adjustments
are made while the conveyor belt is running. After
the proper belt tension is obtained (see above),
turn the conveyor unit on and set it at the fastest
speed setting. Watch for a tendency of the conveyor
belt to drift to one side of the conveyor. To adjust
the belt tracking, tighten the take-up screw nut
(Fig. 21) on the side the belt is drifting toward,
and loosen the take-up screw nut on the opposite
side. Adjusting the take-up screw nuts on either
side of the conveyor allows belt tracking adjustments
to be made without affecting belt tension. Note:
Adjust the take-up screw nuts only 1/4 turn at a
time. Then allow time for the belt to react to the
adjustments before proceeding further. Try to
avoid over-adjustments.
REPLACING V-BELT
To change the V-belt on the SUPERBRUSH, first
disconnect power source to machine.
1. Lower the main motor to its lowest position
using the brush speed control handle. Raise the
motor to its highest position. This will loosen the
V-belt in the drive pulley so the V-belt can be lifted
off the driven pulley.
2. Remove the miter gear from the right (inboard)
side of the transfer rod (Fig. 14). (If E clips are
attached to the rod, remove both at this time.)
Now loosen the shaft collar on the left (outboard)
side of the rod, and pull the rod back enough so
the V-belt can be removed. (Make sure to catch
the nylon washer which will drop off the transfer
rod.)
3. Remove the inner half of the pulley guard by
removing the six screws holding the inner half to
the outer half. Remove the inner half of the pulley
guard.
4. Remove the top two bolts holding the top of the
outer pulley guard. The outer half of the pulley
guard can be removed by pulling it up and out
through the head assembly.
5. Remove V-belt from drive pulley. If there is not
enough clearance to remove V-belt loosen the four
bolts securing the main motor to bracket. Note
location of motor before sliding motor out of the
way for ease of reassembly. Note the routing of the
old V-belt: now remove the old V-belt and replace
it with the new V-belt (Fig. 23 and 24).
NOTE: If the V-belt will not fit between the drive
pulley and the brush support casting, loosen or
remove the bolts holding the bearings. Lift brush
enough to allow V-belt to be removed. After
installing new V-belt, retighten bolts.
Machine Reassembly
1. To reassemble the unit after replacing the V-belt,
first reassemble the pulley guards.
2. Place the transfer rod back through the machine
and reinstall the nylon washer. Tighten the shaft
collar (install both of the E clips if so equipped).
Reinstall the miter gear on the transfer rod, making
sure the set screw is centered on the flat of the rod.
3. Adjust the tension on the V-belt by lowering the
motor using the brush speed control handle.
4. Make sure that the V-belt is in alignment. Also
check that all belts are tight before using the
S
UPERBRUSH.
To Next Page
Loading...
