Hilti DX 36 Operating Instructions Manual page 31

CAUTION
The tool may get hot during use. You could burn your
hands. Do not dismantle the tool while it is hot. Allow
the tool to cool down.
9.1 Care of the tool
Clean the outside of the tool at regular intervals with a
slightly damp cloth.
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WARNING
Do not clean with a spray or pressure washer. Do not
permit foreign objects to enter the interior of the tool.
9.2 Maintenance
Check all external parts of the tool for damage at regular
intervals and check that all controls operate faultlessly.
Do not operate the tool if parts are damaged or when the
controls do not function faultlessly. If necessary, the tool
should be repaired by Hilti Service.
Use the tool only with the recommended cartridges and
power settings. Use of the wrong cartridges or use of
excessively high power settings may lead to premature
failure of parts of the tool.
CAUTION
Dirt and residues in DX tools contain substances that
may be hazardous to your health. Do not inhale dust /
or dirt from cleaning. Keep the dust or dirt away from
foodstuffs. Wash your hands after cleaning the tool.
Never use grease for the maintenance/lubrication of
parts of the tool. This may lead to malfunctions. Use
only Hilti lubricant spray or a product of equivalent
quality.
9.3 Servicing the tool
Service the tool if fastener driving power is found to be
inconsistent, if cartridges misfire or if parts of the tool
no longer move or operate smoothly and easily. In other
words, servicing is necessary when it takes more force
to press the tool against the work surface, when trigger
resistance increases, when the power regulating wheel
begins to stick, when the cartridge strip is difficult to
remove or the cycling action becomes increasingly stiff.
9.3.1 Disassembling the tool 8
CAUTION
Forcing the spring clip into place may cause it to jump off
with considerable energy. Take care to avoid injuring
yourself or others. Hold the assembly with its back
facing downwards.
1. Pivot the catch out by turning the ring through 45
degrees.
NOTE If the catch sticks, a nail can be used to help
release it.
2. Allow the assembly to slide out of the tool.
NOTE If the assembly sticks in place it can be
released by pulling with a jerk.
3. Remove the spring clip. Use a suitable tool for this
purpose (e.g. screwdriver or nail).
4. Pull the base plate, complete with the fastener guide,
off the piston guide.
26
5. Pull the piston out of the piston guide.
6. Allow the fastener guide to slide out of the base
plate toward the rear.
NOTE If the parts of the tool tend to stick due to
carbon build-up, use the piston to push the fastener
guide out of the base plate from the front.
9.3.2 Checking the piston for wear
NOTE
Never use a worn or damaged piston and do not attempt
to manipulate or modify the piston.
Replace the piston when:
- the piston is broken
- the piston is badly worn or chipped (e.g. a 90° segment
broken away).
- the piston rings are cracked or missing.
- the piston is bent (check by rolling the piston on a
smooth, flat surface).
9.3.3 Checking the fastener guide for wear
Replace the fastener guide if the tubular section is dam-
aged (e.g. bent, widened or cracked).
9.3.4 Checking the spring clip for wear
Replace the spring clip if it is badly worn or bent.
9.3.5 Cleaning 9 10 11 12
Clean the tool at least once a week or, respectively,
immediately after each period of heavy use (after driving
approx. 3,000 nails).
Use the appropriate brushes to clean the individual parts:
1. Clean the fastener guide and base plate, inside and
out.
2. Clean the piston and piston rings until the parts
move freely.
3. Clean the piston guide, inside and out.
4. Clean the inside of the housing.
9.3.6 Lubrication
Spray the cleaned parts lightly with the Hilti lubricant
spray supplied. Use only Hilti lubricant spray or a product
of comparable quality.
9.3.7 Assembling the tool 13
NOTE
Handle the small parts carefully. They could get lost.
1. Fit the fastener guide into the base plate.
2. Slide the piston into the piston guide as far as it will
go.
3. Fit the base plate with the fastener guide onto the
piston guide.
NOTE The pin on the piston and the slot in the base
plate and piston guide must be in alignment.
4. Press the spring clip into the recess.
5. Guide the assembly into the tool.
NOTE The slot in the assembly must be in alignment
with the catch.