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LUBRICATION
This tool is fitted with blades which can
operate without lubricated air. However,
a small amount of oil allows the tool to
provide full power and lengthens its life.
The use of dry air with no trace of oil may
reduce the life of blades.
MAINTENANCE INSTRUCTIONS
The use of spare parts other than those
originally supplied by the manufacturer
may result in a drop in performance or
in increased maintenance and level of
vibration and in the full cancellation of the
manufacturer's liability.
To obtain maximum efficiency from the
pneumatic tool, preserve its features
and avoid repeated repairs, a routine
inspection and repair programme
are recommended at least every 500
hours, the intervals between the various
inspections depending on the amount of
exertion on the power tool.
When disposing of components,
lubricants, etc... ensure that the relevant
safety procedures are carried out.
The rotor blades in this tool have a PTFE
content. The normal health and safety
recommendations concerning PTFE must
be observed when handling these rotor
blades.
● Do not smoke.
● Motor components must be washed
with cleaning fluid and not blown clear
with an air line.
● The silencer must be replaced when
dirty, do not clean and re-use.
● Wash hands before commencing any
other activity.
01/2016
DISASSEMBLY AND REASSEMBLY
INSTRUCTIONS
See page 6.
Disconnect the machine from the
compressed air supply.
Remove all accessories.
K912-300/500
● Unscrew the front housing (45) and the
intermediate housing (43).
Disassembling the collet spindle assembly
(see figure 3):
● Unscrew the plug (52) before extracting the
spindle, being careful with the needles.
Disassembling the turbine:
● Remove the turbine from its housing (15), and
pull out the lock ring (28 or 31).
● Unscrew the speed governor (17) or the screw
(16).
Left thread (see figure 4).
● Disassemble the turbine (see figure 5).
● Clamp the rotor slightly in a vice fitted with
lead jaws, then unscrew the coupling fork (41)
or the collet holder (34 or 37).
Reassembling the turbine:
● Proceed in reverse order with respect to
disassembly.
Be careful with the direction for
assembling the blades.
● Apply a small quantity of "Loctite 243" on
the thread of the governor (17) or screw (16)
before tightening it to a torque of 2 Nm.
● Make sure that the turbine is correctly
positioned (see figure 6).
K912-300/500
Reassembling the complete collet holder:
● Proceed in the reverse order with respect to
disassembly.
● Grease the collet holder (49) before
positioning the needles.
13 / 40
6159945470_16
Indicates direction of dismantling.
Series: B
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