Rollers - Adjustment/Inspection - Husqvarna K7000 Ring Workshop Manual

5 ROLLERS – ADJUSTMENT/INSPECTION
The rollers must always be adjusted following:
– changeover to a new blade
– changeover to another used blade
– replacement of guide or support roller
Always check the adjustment whenever the support roller cover has
been removed and refitted.
IMPORTANT: When adjusting the rollers, the knobs must be
screwed out – but not out fully to its end position as this will stop the
engagement roller rotation.
B
A
A
A
B
8
A
1 2
3
B
4
16–20 Nm
5
6
Correct adjustment
Correctly adjusted rollers are essential for
the operation of the machine and to
minimise wear.
Correctly adjusted means that the
rollers are in contact with the blade with -
out any play.
If the contact is too firm, this will
increase roller wear and cause deforma-
tion of the blade which, at worst, could
lead to a blade fracture.
If the contact is not firm enough, this
will mean that control of the blade will
be worse, which in extreme cases could
lead to the blade leaving the groove.
Function
The support rollers are mounted on the
arms of the support roller cover. The
position of the arms is determined by the
adjuster screws (A). The nuts (B) lock the
arms' position.
Adjustment and checking
Adjustment of the roller contact with the blade must
be made when the blade is mounted. Checking and
readjustment must also be done at least once during the
blade's life.
1. Screw out the knobs
Unscrew both knobs to the maximum position, then a
half turn in.
2. Slacken off the lock nuts
This should only be done when carrying out readjust-
ment when the blade is worn and has not been removed
from the machine. When blade replacement is being
carried out, according to the previous chapter, this has
already been done.
Slacken off the lock nuts (B). Then tighten the lock
nuts slightly before starting adjustment.
3. Adjustment
Place a wrench on one support roller, and rotate it back
and forth while screwing in the adjuster screw (A) slowly.
When the roller comes into contact with the blade and
this rotates, the adjustment is correct. Do the same for
the other support roller.
4. Tighten the lock nuts, 16–20 Nm/12–15 lbf·ft.
Tighten the lock nuts (B) at a torque of 16–20 Nm.
5. Checking
If the adjustment has been made correctly, it should be
possible to slow the roller rotation using your thumb
while the blade is rotated by hand.
If one of the rollers is adjusted incorrectly, steps 2–5
must be performed for the appropriate roller.
6. Screw in the knobs
Finish by tightening the knobs in operating position.