Engagement And Support Rollers - Husqvarna K6500 Ring Workshop Manual

ENGAGEMENT AND SUPPORT ROLLERS

Min. 1.5 mm
Service position
Replaceable wear parts
The engagement and support rollers, as well
as the drive wheel, are exposed to extreme
wear due to the dirty conditions in which
they operate. As a result, wear parts have
been made easy to replace. The lifespan of a
set of engagement and support rollers can
vary considerably depending on the material
cut and the cutting technique employed.
Using insufficient water during cutting
increases wear. A set usually rolls approxi-
mately 2–6 blades.
Same roller type replaced in pairs
In order for the blade to sit straight in the
drive disc, the same roller type must be
replaced in pairs.
Operating position
A
B
Upper and lower rollers may be
swapped
It is common for the flange of the upper
engagement roller to experience more wear
due to the additional load exerted on it by
the feed pressure. You can swap the upper
and lower engagement rollers in order to get
the full operational life out of both rollers.
Wear limit
Engagement rollers
The engagement rollers must have a flange
width of at least 1.5 mm/.06 in.
Support rollers
The support rollers must be replaced if they
have no grooves.
Engagement rollers
– construction
The spring, which creates compressive
force on the blade's drive wheel, is pre-
tensioned and contained within the bea-
ring holder. The movement limiter, in
the middle of the spring, limits the en -
gagement roller movement in the event
of abnormal stresses, such as jamming.
Service position
The knobs are screwed out which elimi-
nates the spring force to the engagement
rol lers and drive wheel. Service position
is used when replacing the blade and
adjusting the rollers.
Operating position
The knobs are screwed into bottom
position whereby the engagement rollers'
springs tighten the cutting blade to the
drive wheel.
Lubrication – operating position
The bearing housing has lubricating
ducts that directs the grease from the
nipple (A) to the outlet duct (B) which
indicates when the correct amount of
grease has been filled. Lubrication is
done with the knobs in operating posi-
tion (knobs screwed in).
6
9