Engagement And Support Rollers - Husqvarna K3600 Mk II Workshop Manual

6

ENGAGEMENT AND SUPPORT ROLLERS

Min. 1.5 mm
.06 in.
A
8
Replaceable wear parts
The engagement and support rollers, as well
as the drive disc, 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.
B
C
1
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
The engagement roller unit assembly (A)
comprises bearing brackets, which hold
double roller bearings, and the engage-
ment roller itself, which is fitted on the
shaft. The spring, which provides pressure
to the drive disc, is pre-tensioned and
fixed in the bearing bracket. The plastic
cylinder in the centre of the spring limits
movement of the bearing bracket when
the cutting blade is exposed to extreme
loads.
The bearing bracket moves in the
machine's bearing housing. Lubrication
is applied via the grease nipple (B) and
lubrication channels in the bearing
housing carry grease to the outlet channel
(C), which indicates when clean grease
comes out.
NB: The bearing housing must be
lubricated with the blade fitted and the
knobs in operational position!
Knobs
2
Operational position (1)
The knobs must always be fully screwed
in when the machine is put in operation.
Service position (2)
The knobs must be screwed out when
changing the blade and adjusting the
rollers.
Disassembled knob (3)
3
Screwing the knob past the service
position releases the snap-on fastener
from the cam, allowing the bearing
bracket to be pressed out.