jobmate JMPGB150G, Safety And Operating Manual

Page: 8 / 12

8
4. CHANGING GRINDING WHEELS (SEE FIG.E)
To change the grinding wheels, first unplug from mains supply
then remove the eye shield brackets, then undo and remove
the three screws holding the wheel guard covers in place.
Remove the cover. Undo and remove the two wheels retaining
nuts (a). You may have to hold the wheel and give the spanner
a firm tap with a soft headed hammer to release the nut, take
off the large domed washer (b), paper washer (c) and remove
the wheels (d).
NOTE: The nut on the right side of the grinder has a standard
right hand thread (turn counter-clockwise to loosen). The
one on the left side has a left hand thread (turn clockwise to
loosen).
Replace in same order, making sure both domed washers
face correct direction, check the paper washer(c and e), if
damaged replace with new paper washer. Hold the wheel and
tighten the nut firmly but do not over-tighten.
NOTE: Only replace flanges with original items, these can be
supplied through a authorized dealer.
WARNING: OVERTIGHTENING CAN CRACK A
GRINDING WHEEL.
MAINTENANCE
Remove the plug from the socket before carrying out any
adjustment, servicing or maintenance.
If the supply cord is damaged, it shall be replaced by the
manufacturer or its service agent or similarly qualified person
in order to avoid a hazard.
TROUBLESHOOTING
Although your new bench grinder is really very simple to
operate, if you do experience problems, check the following:
1. GRINDER WILL NOT START
Check that there is “mains” at the socket; test with an
electrical screwdriver or another electrical appliance;
check the connections in the plug; correct and tighten poor
connections; check the fuse; if suspect replace with correct
rating.
2. WHEEL WOBBLES OR VIBRATES
Check that the lock-nut is tight. Check that the wheel is
correctly located on the shaft and locating washer. If
excessive pressure has been used or the wheel has “caught”,
it may be damaged causing it to vibrate. If there is any
evidence that the wheel is damaged, do not use, remove it
and replace with a new wheel. Dispose of old wheels sensibly.
Fig.A
Fig.B
Fig.C
Fig.D
Fig.E