Dolmar MS-26 U - Resharpening the Cutting Tool

16
ADJUSTMENT OF LOW-SPEED REVOLUTIONS (IDLING)
The cutter blade or the nylon cutting head should not rotate when the control
lever is fully released. If necessary, adjust the idling rpm using the idling
adjustment screw.
Checking the Idling speed
– The idling speed should be set to 3,000 min
-1
.
If necessary, adjust the idling speed using the idling screw (the blade or the
nylon cutting head must not turn when the engine is idling).
Tightening the idling screw (1) increases the engine revolutions, whereas
loosening the idling screw reduces the engine revolutions.
CAUTION: The cutting tools listed below must only be resharpened by an
authorized facility. Manual resharpening will result in imbalances of
the cutting tool, which will cause vibrations and damage to the
equipment.
– cutter blade (star blade (4 teeth), eddy blade (8 teeth))
A professional resharpening and balancing service is provided by Authorized
Service Agents.
NOTE: To increase the service life of the cutter blade (star blade, eddy blade)
the blade may be turned over to allow both cutting edges to wear.
NYLON CUTTING HEAD
The nylon cutting head is a dual string trimmer head capable of both automatic
and bump & feed mechanisms.
The nylon cutting head will automatically feed out the proper length of nylon cord
by the changes in centrifugal force caused by increasing or decreasing rpms.
However, to cut soft grass more efficiently, bump the nylon cutting head against
the ground to feed out extra cord as shown in operation section.
Operation
– Increase the nylon cutting head speed to approx. 6,000 min
-1
.
Nylon cord will not feed out correctly at lower speeds (under 4,800 min
-1
).
– The most effective cutting area is shown by the shaded area in the diagram to
the right.
If the nylon cord does not feed out automatically, follow the instructions below:
1. Release the throttle lever so that the engine idles, and then squeeze the
throttle lever fully. Repeat this procedure until the nylon cord feeds out to the
proper length.
2. If the nylon cord is too short to feed out automatically using the procedure
above, bump the knob of the nylon cutting head against the ground to feed
out the nylon cord.
3. If the nylon cord does not feed out using procedure 2, rewind/replace the
nylon cord by following the procedures described under “Replacing the nylon
cord”.
Replacing the nylon cord
– Stop the engine.
– Press the housing latches inward to lift off the cover, then remove the spool.
Resharpening the cutting tool
(1)
Slow High
Most effective cutting area
Knob
Idle speed Full speed
Cover
Latches
Press
Press