Adjusting The V-Belt; Return Spring Adjustment - Jet JDP-387A Gebrauchsanleitung

Tension the belt .
Close and lock the pulley cover with
the locking screw.

7.4 Adjusting the V-belt

Tension the belt with the tension lever
(C, Fig 7).
Loosen the lock nut and adjust the
belt tension with the screw (P).
Fig 7
Belts are properly tensioned when
finger and thumb pressure midway
between the two pulleys causes
approximately 10 mm deflection.
Tighten the lock nut.

7.5 Return Spring Adjustment

Disconnect the machine from the
power source (unplug).
The return spring is adjusted at the
factory and should not need further
adjustment.
If adjustment is necessary:
Loosen the lock nut (A, Fig 8)
approximately 6mm (do not remove).
Fig 8
Firmly hold the coil spring cover (B).
Pull out the cover and rotate until the
pin (C) engages the next notch in the
coil spring cover. Turn the cover
clockwise to decrease tension and
counter-clockwise to increase tension.
Tighten the lock nut (A). Do not over-
tighten. Nut should not contact the
housing when tight.
8. Maintenance and inspection
General notes:
Maintenance, cleaning and repair
work may only be carried out after
the machine is protected against
accidental starting by pulling the
mains plug.
Periodically lubricate gently with
grease.
-the drive splines (grooves) in the
spindle
-the teeth of the quill
-the column-rack
Clean the machine regularly.
Defective safety devices must be
replaced immediately.
Repair and maintenance work on the
electrical system may only be carried
out by a qualified electrician.
9. Trouble shooting
Motor doesn't start
*No electricity-
check mains and fuse.
*Defective switch, motor or cord-
consult an electrician.
Chuck will not stay on spindle
*Oil or grease on contact surfaces-
clean the tapered surfaces of chuck
and spindle.
Machine vibration
*Incorrect belt tension-
Adjust belt tension.
*Dry spindle quill-
lubricate spindle quill.
*Spindle pulley loose-
tighten retaining nut.
*Motor pulley loose-
Tighten set screw.
*dull drill bit-
resharpen drill bit.
Drill bit burns
*incorrect speed-
reduce speed.
7
*Chips clogged-
retract drill bit frequently
*dull drill bit-
resharpen drill bit.
*feeding too slow-
feed faster.
Drill leads off
*cutting lips or angle not equal-
resharpen drill bit correctly.
*drilled hole off centre-
drill a pilot hole first.
*bent drill bit-
use a proper drill bit.
*drill bit not properly installed-
install drill bit correctly.
10. Environmental protection
Protect the environment.
Your appliance contains valuable
materials which can be recovered or
recycled. Please leave it at a
specialized institution.
11. Available accessories
Refer to the JET-Pricelist.