Cleaning & Maintenance; Troubleshooting - Metabo MAG 28 LTX 32 Original Instructions Manual

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7.7 Drilling
Remove the battery pack from the machine
before any adjustments, conversions or
servicing are performed.
Do not use deformed or damaged tools.
Before use, always check tools such as core
drills for deformities or damage.
Do not use accessories that have not been
specified or recommended by Metabo for this
machine. The ability to attach the accessory to your
machine does not guarantee safe operation.
Securing or positioning a tool incorrectly can
cause hazardous situations due to parts
breaking or being blown off.
If the tool is jammed, switch off the driving unit:
Move the switch (8) to the "O" position.
Remove the tool from the borehole.
General notes:
- Centre the position at which the hole is to be
drilled.
- Note: If the display (24) is switching from red to
green (see diagram, page 2), a small amount of
holding power is available, which can be used
when fastening and aligning the magnetic drill
stand.
- Align the magnetic drill stand so that the drill bit is
above the centre marking.
- Fully activate the magnet in the magnetic drill
stand.
- Pull out the lock switch (6).
- Finally, switch on the driving unit (move the switch
(8) to the "I" position).
- If necessary, switch on the cooling lubrication unit
(see chapter 7.2.
- Start the drilling operation with minimum feeding
force. When the drill bit has started to drill, slightly
higher feeding force can be applied. Excessive
feeding force leads to premature wear of the drill
bit. Ensure that the chip flow is regular
- Use a wire hook to remove the chips.
- If the drilled metal piece is not automatically
ejected by the core drill bit: remove it using a tool.
Special notes on tools with morse taper shank
MK2:
Inserting tool:
To prevent the driving unit from moving up/
down accidentally: depress the lock switch (6).
The tool is only guaranteed to fit perfectly in
the drill spindle (13) if the female taper of the
drill spindle and the taper shank of the tool are free
of dirt and grease.
Caution! Never use excessive force to press
tools into the female taper of the drill spindle!
Always use sharp tools in perfect condition.
Switch off the machine. Remove battery pack
from machine.
Tools with a taper shank MK2 can be used directly
in the female taper of the drill spindle (13).
Driving out the tool:
Insert the removal tool (12) - with the sloping edge
against the tool - in the slot (11) on the machine
14
neck. If the removal tool cannot be inserted through
the drill spindle, you should turn the drill spindle (13)
slightly by hand. Drive out the tool by knocking
lightly on the removal tool with a hammer (12).
Special notes on tools with Weldon shank
19 mm:
To prevent the driving unit from moving up/
down accidentally: depress the lock switch (6).
First, insert the industrial holder 6.26602 (see
Chapter 10. Accessories).
When inserting the attachment, ensure that
the side pin of the industrial attachment
engages with the anti-twist device (14).
(17)Then connect the quick-action coupling from
the cooling lubrication unit to the connecting piece on
the industrial attachment 6.26602.
Inserting the tool:
- Insert the centring pin for the core drill bit (see
chapter 10. Accessories) in the tool.
- Insert the tool in the tool holder (16) so that both
surfaces (on the cylindrical part of the tool) are
located at the positions of the threaded pins (15).
- Guide the tool upwards as far as it will go (against
the pressure of the integral spring) and tighten the
threaded pins (15) using the Allen key.
Removing the tool:
- Release the two threaded pins (15).
8. Cleaning, Maintenance
Perform regular maintenance work, cleaning and
lubrication.
Remove the battery pack from the machine before
any adjustments, conversions or servicing are
performed.
To lubricate the rack and pinion that moves the slide
plate (7) up and down, you should occasionally
apply some multi-purpose grease to the rack.
Coat the sliding surfaces of the slide plate (7) with
multi-purpose grease.
Occasionally apply a drop of machine oil to the area
where the shaft penetrates (23) the magnet section.
To prevent rust, occasionally rub the magnet block
with a cloth soaked in oil.
Backlash of the slide plate
The backlash of the side plate is set ex works.
The side plate (7) must be adjusted so that it can still
be moved freely up and down (when the driving unit
is installed), and so that it will remain in any position
without the weight of the driving unit pulling it down.
If necessary, you can adjust the backlash of the
slide plate (7) using the three threaded pins (5):
release the counternuts, tighten the threaded pins
and fasten the counternuts again.

9. Troubleshooting

The electronic signal display (9) lights up and
the load speed decreases. The temperature is too