Care And Maintenance - Hilti DX462CM/HM Operating Instructions Manual

8. Care and maintenance

When this type of tool is used under normal operating
conditions, dirt and residues build up inside the tool
and functionally relevant parts are also subject to wear.
Regular inspections and maintenance are thus essen-
tial in order to ensure reliable operation. We recom-
mend that the tool is cleaned and the piston and piston
brake are checked at least weekly when the tool is sub-
jected to intensive use, and at the latest after driving
10,000 fasteners.
8.1 Care of the tool
The outer casing of the tool is manufactured from impact-
resistant plastic. The grip comprises a synthetic rubber
section. The ventilation slots must be unobstructed and
kept clean at all times. Do not permit foreign objects to
enter the interior of the tool. Use a slightly damp cloth
to clean the outside of the tool at regular intervals. Do
not use a spray or steam-cleaning system for cleaning.
8.2 Maintenance
Check all external parts of the tool for damage at regu-
lar intervals and check that all controls operate proper-
ly. Do not operate the tool when parts are damaged or
when the controls do not operate properly. If necessary,
have the tool repaired at a Hilti service centre.
■ The tool can get hot while oper-
ating.
■ You could burn your hands.
■ Do not disassemble the tool while
it is hot. Let the tool cool down.
Servicing the tool
The tool should be serviced if:
1. Cartridges misfire
2. Fastener driving power is inconsistent
3. If you notice that:
● contact pressure increases,
● trigger force increases,
● power regulation is difficult to adjust (stiff),
● the cartridge strip is difficult to remove.
CAUTION while cleaning the tool:
● Never use grease for maintenance/lubrication of tool
parts. This may strongly affect the functionality of the
tool. Use only Hilti spray or such of equivalent quality.
● Dirt from DX tool contains substances that could be
endangering your health.
– Do not breath in the dust from cleaning.
– Keep dust away from food.
– Wash your hands after cleaning the tool.
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8.3 Disassemble the tool
1. Check that no cartridge strip is present in the tool. If
Printed: 12.08.2013 | Doc-Nr: PUB / 5126470 / 000 / 01
CAUTION
a cartridge strip is found in the tool, pull it upwards
and out of the tool by hand.
2. Press the release button at the marking head side.
3. Unscrew the marking head.
4. Remove the marking head and the piston.
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8.4 Check the piston for wear
Replace the piston if:
● It is broken
● The tip is heavily worn (i.e. a 90° segment is chipped
off)
● Piston rings are broken or missing
● It is bent (check by rolling on a even surface)
NOTE
● Do not use worn pistons. Do not modify or grind pis-
tons
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8.5 Cleaning the piston rings
1. Clean the piston rings with the flat brush until they
move freely..
2. Spray the piston rings lightly with Hilti spray.
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8.6 Clean the threaded section of the marking head
1. Clean the thread with the flat brush.
2. Spray the thread lightly with Hilti spray.
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8.7 Disassemble the piston return unit
1. Press the release button at the gripping part.
2. Unscrew the piston return unit.
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8.8 Clean the piston return unit
1. Clean the spring with the flat brush.
2. Clean the front end with the flat brush.
3. Use the small round brush to clean the two holes at
the end face.
4. Use the large round brush to clean the large hole.
5. Spray the piston return unit lightly with Hilti spray.
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8.9 Clean inside the housing
1. Use the large round brush to clean inside the hous-
ing.
2. Spray the inside of the housing lightly with Hilti
spray.
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8.10 Clean the cartridge strip guideway
Use the scraper provided to clean the right and left car-
tridge strip guideways. The rubber cover must be lifted
slightly to facilitate cleaning of the guideway.
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8.11 Spray the power regulation wheel lightly with
Hilti spray.
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8.12 Fit the piston return unit
1. Bring the arrows on the housing and on the exhaust
gas piston return unit into alignment.
2. Push the piston return unit into the housing as far as
it will go.
3. Screw the piston return unit onto the tool until it
engages.
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