REPLACEMENT OF ENGAGEMENT AND SUPPORT ROLLERS
Engagement rollers
Remove the complete en-
gagement roller unit (bea-
ring housing with fitted
engagement roller).
Old model
Remove the stop screws (A).
Remove the knob (B).
New model
Unscrew the knob.
Engagement rollers
Remove the support roller shroud
and the blade.
When replacing the engagement
roller, the complete bearing housing
is taken out for inspection and ser-
vice.
Old model
Remove the stop screws (A). Remove
the knob (B).
New model
Force the knob off the snap-in faste-
ner by unscrewing the knob past the
end position. Unscrew the knob (B).
8
Replacement of engage-
ment rollers
Tension the tool in a vice
The easiest way to remove the worn
part is to secure a box spanner in a
vice. Lock the nut using the box
spanner and unscrew the hex-head
screw.
Never put the roller in the vice!
Inspection, cleaning
Pull or push out the bearing housing.
A defective bearing housing
(wear/corrosion) is most conveniently
replaced with a new bearing housing
complete with bearings.
Bearings are replaced as per chap-
ter 8.
Clean the bearing housing from all
traces of old grease.
Wipe the bearing housing clean and
dry and check that it is undamaged.
Check that the engagement roller’s
bearings are in good condition.
Grease – properties
The grease used in the following
service measures should be of a
thick type that offers good
resistance to water penetration.
The grease used by the factory
during assembly is Shell Alvania
RL3 (lithium grease), where the
figure 3 indicates the grease’s
NLGI rating.
If other brands are used, grease
with a corresponding NLGI rating
should be used.
(The NLGI rating indicates the
grease’s stiffness, with a high
rating indicating stiff grease.)
Worn-out engagement rollers and sup-
port rollers have a smaller diameter
than their new counterparts. Unscrew
the adjustment screws 2 turns if one
roller type is replaced, and 4 turns if all
the rollers are replaced with new parts,
before refitting the shroud.
A
A
B
B
Old model
New model
Inspection, cleaning
Pull or push out the bearing
housing.
A defective bearing housing
is most conveniently replaced
with a new bearing housing
complete with bearings.
Bearings are replaced as per
chapter 8.
Clean the bearing housing.
Wipe the bearing housing
clean and dry and check that
it is undamaged.
Check the engagement roller’s
bearings.
Replacement of
engagement rollers
Tension the tool in a vice
Lock the nut using the box
spanner and unscrew the
hex-head screw.
Never put the roller in the
vice!
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