Extraordinary Maintenance - Cembre NR-13E Operation And Maintenance Manual

Always disconnect the power supply before any maintenance operation on the machine.
Never open the electrical control box when the machine is connected to the mains supply.
4.1) ORDINARY MAINTENANCE
Avoid placing the wrench on dusty or muddy ground.
After each day's use, carefully clean the wrench with a cloth making sure to remove any dirt it has
picked up, paying particular attention to moving parts and the anvil zone.
Carry out the following operations at regular intervals:
– With the impact wrench in horizontal position, check the level of the oil in the gearbox/re-
duction gear through the transparent port (10) (Ref. to Fig. 12a), if necessary top up (see §
4.2.3).
– Check and if necessary tighten all nuts and bolts.
– Check the rubber shock absorbers which dampen anvil vibrations at the handgrip.

4.2) EXTRAORDINARY MAINTENANCE

4.2.1) Checking the impact unit
The impact striker and anvil are subject to wear. Should a noticable loss of torque be detected over
intense and/or prolonged operation, check these components for wear.
4.2.2) Changing grease in the impact unit (at least once a year).
Under normal operating conditions, replace the grease in the unit at least once a year, to maintain
efficiency and performance.
Maintenance operations described in § 4.2.1 and 4.2.2 require qualified personnel.
4.2.3) Changing oil in the gearbox/reduction gear (every 4 years)
To top up or change the oil in the gearbox/reduction gear:
– Turn the impact wrench over.
– Using a 5mm Allen wrench, unscrew the cap with magnetic insert (T) (Ref. to Fig. 12).
– To change the oil, lean the wrench over to facilitate complete emptying of the oil.
– Carefully remove any metal residue from the magnetic insert (T).
– Add oil, MAX. 250 ml.
– Replace the cap (T) and screw it on tightly.
Ensure that used oil is disposed of in accordance with current legislation.
Always use clean recommended oil, see § 1.
Do not use old or recycled oil.
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4. MAINTENANCE
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