10
Draining the air filter
Drain the air filter regularly by pressing the drainage valve
upwards. The filter is also drained automatically when the
compressed air is switched off. A hose can be connected to the
drainage valve if required (to discharge the water in a convenient
place).
Cleaning the air filter
• Unscrew the filter bowl
• Unscrew the separator disc
• Clean the filter
• Blow clean the filter from the inside out
• Fit back the filter
• Fit back the filter bowl
Ejector
The pneumatic system includes an ejector that serves to create
the vacuum which locks the grinding disc and driver plate to each
other. The ejector does not normally need any maintenance. If it
needs to be cleaned, simply remove the connection nipples and
blow clean the ejector housing.
Grinding spindle
The spindle is manufactured with great precision. Rough handling
can reduce the service life of grinding wheels. Care must there-
fore be taken when changing the grinding wheel. If necessary, use
the puller to remove the grinding wheel, product code 87005058.
Before fitting a new grinding wheel, lightly grease the spindle. The
bearings of the grinding spindle are permanently lubricated and
does not normally need further lubrication.
Dismantle, overhaul and assemble.
The outer nut threads are different. The one at the front end
(87000780) has a right hand thread, turn counter-clockwise to
open. The one at the back (87000781) is a left hand thread.
The inner nuts are all right hand thread.
To remove the ball bearings, pull them off. Use a puller. Check
that the spindle shaft is in good condition. If the shaft has run out
larger than 0,02 mm, replace it.
Vibrations will effect the grinding result and the life of your
diamond grinding wheel.
IMPORTANT
When mounting the bearings back on to the spindle. Press them
back. Use a sleeve.
Fill each of the new ball bearings to 25% with the recom-
mended grease. – Do not overfill the bearings!
IMPORTANT
Note the direction of the disc springs.
Grinding disc and driver plate
Make sure that the surfaces between the grinding disc and the
driver plate are always clean. The O-ring between the two plates
must be checked regularly. Damage to the O-ring will reduce the
strength of the vacuum. Small amounts of oil can be used to
prevent corrosion.
Protective bellows
The bellows serve to protect the tubular ball guides from dirt.
Make sure that they remain in good condition in order to prevent
grinding dust from entering and damaging the tubular ball
guides.
Drive belt
The drive belt between the
motor and grinding
spindle can be tensioned
by adjusting a spring-
loaded screw on the
motor shelf.
It is important for the motor shelf to be correctly adjusted,
otherwise the drive belt can wander on the jockey wheels,
which can result in damage.
IMPORTANT
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