Tips And Tricks; Troubleshooting - Metabo KHE 28 Plus Original Instructions Manual

17026909_0608 UHE KHE 28 Plus KHE Partner Edition.book Seite 14 Dienstag, 17. Juni 2008 3:51 15
ENGLISH
ENG
Note: To prevent the spindle from turning while
changing chucks, set the switch button (13) to
chiselling mode.
8.7 Tool change with SDS chuck
Before fitting, clean tool shank and apply
special grease (accessories order no.
6.31800)! Use only SDS-Plus tools.
Inserting the tool:
Turn the tool while inserting until it locks into place.
The tool is automatically locked.
Removing the tool:
b
Turn tool lock (3) in direction indicated by arrow (a)
and remove tool (b).
8.8 Tool change with keyless chuck
Use the keyless chuck when non-impact drilling in
metal, wood etc. and driving screws.
Chucking the tool
b
Turn sleeve (4) in the direction of "AUF, OPEN" (a).
Insert tool as deeply as possible (b) and turn sleeve
in the opposite direction, until the mechanical
resistance which can be felt is overcome. Caution!
The tool is not yet clamped!
Keep turning the sleeve (it must "click" when
turning) until it cannot be turned any further - only
now is the tool securely clamped.
With a soft tool shank, retightening may be
required after a short drilling period.
Removing the tool:
Turn sleeve (4) in the direction of "AUF, OPEN",
and remove the tool.
14
Note: The grating sound which may be heard after
opening the drill chuck is functional and is stopped
by turning the sleeve in the opposite direction.
If the chuck is very securely tightened: Unplug.
Hold drill chuck using an open-end spanner at the
flats on its head, and turn the sleeve (4) vigourously
in the direction of "AUF, OPEN".

9 Tips and Tricks

Only moderate pressure is required for hammer
drilling and chiselling. Applying a high degree of
pressure does not increase performance.
When drilling deep holes, remove the drill bit peri-
odically from the hole to remove dust.
Drill tiles and other brittle materials without impact.
10 Maintenance
a
Always keep the safety coupling (16) clean and
free from dust.
Always keep the spindle (6) clean and apply a light
coating of grease. (for information on special
grease, see Accessories section: order no.
6.31800)
Keyless chuck (1) cleaning:
After prolonged use hold the chuck vertically, with
the opening facing down, and fully open and close
it several times. The dust collected falls from the
opening. Regular use of cleaning spray on the jaws
and jaw openings is recommended.
Ventilation slits:
Clean the ventilation slits on the machine occa-
sionally.

11 Troubleshooting

a
If the trigger switch (12) cannot be depressed,
check to see that the rotation selector switch (10)
is fully set to the R or L position.
Electronic signal indicator (9):
Rapid flashing - restart protection
When power is restored after a power failure, the
machine - which is still switched on - will not start
for safety reasons. To continue operation, switch
the tool off and then on again.
Slow flashing - carbon brushes worn
The carbon brushes are almost completely worn. If
the brushes are completely worn, the machine
switches off automatically. Have an authorised
service centre replace the brushes.