Draper 02520 Podręcznik - Strona 17
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10. MAINTENANCE AND TROUBLESHOOTING
10.1 CHANGING THE GRINDING WHEELS
For your own safety, always turn the main switch on the machine "OFF" and remove the plug from
the power supply before carrying out any servicing or maintenance.
− Remove the screws which secure the grinding wheel side covers then take off covers.
− Either, hold the opposite wheel firmly and remove the nut and flange, or place a wedge
between the grinding wheel and the wheel guard, then remove the nut and flange.
Note: the left hand grinding wheel nut has a left thread.
− When fitting a new grinding wheel always check that the stated max. grinding wheel RPM
exceeds the RPM of the bench grinder. Also check the grinding wheel for damage such as
flaws or cracks, then if the wheel appears satisfactory fit the new wheel to the grinder.
− Remove the old wheel and replace it with the new one.
− Place the flange on the spindle and tighten the spindle nut just enough to hold the wheel firmly.
Do not over tighten the nut as the wheel may become damaged. Repeat the above to replace
the opposite wheel.
− Re-assemble the side covers.
− Stand to one side of the grinder and switch "ON". Let the grinder operate at full speed for
approximately one minute so that any undetected cracks or flaws in the wheel will become
apparent.
10.2 TROUBLESHOOTING GUIDE
Warning!
For your own safety, always turn the main switch on the machine "Off" and remove the plug from
the power supply before carrying out any servicing or maintenance.
Problem
Machine will not start.
Machine vibrates.
Possible Cause
Fuse.
Other.
Wheel out of balance.
Wheel loose.
Damaged wheel
(consumable item).
– 17 –
Remedy
5 amp time delay fuse or
circuit breaker.
Authorised service agent.
Dress wheels.
Stop machine immediately.
Tighten wheel.
Replace wheel
(consumable item).