Maintenance - Cembre NR-11P Operation And Maintenance Manual

Before servicing or removing any parts, stop the engine and allow it to cool.
Always remove the spark plug cap from the spark plug when servicing the engine to
prevent accidental starting.
6.1) 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 (06) (Ref. to Fig. 15a), if necessary top up (see §
6.2.3).
– Check and if necessary tighten all nuts and bolts.
– Check the rubber shock absorbers which dampen anvil vibrations at the handgrip.
6.1.1) Cleaning the air fi lter (once a week)
Move switch (14) to position "0" to facilitate removal and insertion of the fi lter.
– Unscrew knob (C) and remove the cover (Ref. to Fig.13).
– Unscrew the two screws (B) and extract the fi lter.
– To remove dust and dirt, half open the fi lter and blow clean using compressed air.
– On completing the cleaning operation, reassemble all parts.
Operating in dusty condition may require more frequent maintenance.
Do not operate the engine with the air fi lter removed.
6.1.2) Cleaning the spark plug (once a month)
– Unscrew knob (C) and remove the cover (Ref. to Fig.13).
– Disconnect the spark plug cable and remove the rubber ring (G) (Ref. to Fig. 14).
– Unscrew the spark plug using the 19 mm socket supplied.
– Use a wire brush to remove any dirt from the electrode, being careful not to damage the ceramic
support.
– Check, and if necessary, adjust the distance of the electrodes to 0.5 mm.
– Install the spark plug, replace the rubber ring (G), reconnect the cable and assemble the cover.
– Should the spark plug require changing use ACTIVE MR80 type or equivalents
(NGK CMR5H).
6.1.3) Cleaning the fuel fi lter (once every 6 months)
– Using the 4 mm Allen wrench supplied, remove the red side protection shield by unscrewing
the fi xing screws (Ref. to Fig. 12a).
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6. MAINTENANCE

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