7
2. Regularly check the condition of the engine air
cleaner, especially in dusty environments.
3. The drive belt may stretch after a short period
of use, but should then stabilise for a
considerable time if not overloaded or
constantly slipped.
If the engine is not approximately level (i.e. if it
is hanging backwards away from the chute)
then the spring pressure on the belt may be
reduced causing the belt to slip.
To return the engine to level: Remove the
belt guard; loosen the 4 engine mounting bolts
using two 13mm spanners; raise the engine
mounting plate until the engine is tilting
slightly forward; pull the engine back in its
mounting slots and tighten two rear engine
mounting bolts; check that the engine is now
level; tighten the remaining engine bolts;
replace the belt guard.
NOTE: Replace the drive belt when the
engine has reached the end of its slotted
holes and it is still sloping backwards.
4. If the engine is vibrating badly, the 10mm
engine pivot bolts under the engine mounting
plate may need tightening. Do not tighten
them fully, and after tightening check that the
engine still pivots by lifting it by hand. If it does
not pivot, the belt will slip as the weight of the
engine keeps the belt tight. Removing the
pivot bolts and greasing them at least once a
year will increase the life of the pivot bushes.
New Nyloc nuts may be necessary after
removing them a few times.
5. To
remove
the
chipper
blade
for
sharpening/replacement.
•
Disconnect the spark plug lead from the
spark plug.
•
Loosen
the
upper
bolt
on
the
maintenance cover plate and remove the
lower bolt.
•
Remove the plastic shredder chute.
•
Rotate the maintenance cover plate to
expose the hole under the plate.
•
Rotate the shredder-chipper rotor until
the chipper blade is opposite the
maintenance hole.
•
With a sharp object such as a nail,
remove wooden debris from the allen key
holes in the two countersunk chipper
blade bolts.
•
Remove the bolts and the chipper blade
using an allen key and a 13mm spanner.
[BEWARE OF THE SHARP EDGE ON
THE CHIPPER BLADE.]
•
Sharpen blade to 45
o
. Do not remove
more than 2mm of material as this will
cause rotor imbalance. I.e. the minimum
blade dimensions are:
•
Never use a cracked chipper blade.
•
Use new Nyloc nuts when replacing the
chipper blade, and new bolts if they
appear damaged. Ensure the blade is
sitting flat on the rotor surface before
tightening.
!
a) 4mm Allen key.
b) 8mm spanner.
c) ¼” rod or a Phillips head screwdriver with
a shaft 6mm diameter or smaller.
d) Bearing puller.
e) Two 18mm open ended spanners.
f)
1
/
8
” Allen key.
"
1. The shredder blades can be turned 180
o
to
expose fresh cutting faces.
2. To remove the blades, first remove the
shredder chute and open the maintenance
cover near the chipper tube.
3. Remove the spark plug lead from the spark
plug.
4. Remove the belt guard.
5. Align one shredder assembly shaft with the
hole under the maintenance cover.
6. Remove the small bolts through the shredder
shaft.
7. Insert a rod or Phillips head screwdriver
through the small hole above the pulley in the
left hand plate and push the shredder shaft
out through the maintenance hole.
8. Check the condition of the shredder shaft. If it
is badly grooved (i.e. grooves greater than
1mm deep) then replace it. Similarly replace
worn spacers (see lengths below.)
9. Repeat the same operation for the other two
shredder shafts.
10. When replacing the shafts and blades, use
new Nyloc nuts on the shaft bolts and install
new bolts if they are damaged or worn. Do not
reuse cracked or badly worn blades.
11. The blades must be installed as shown above.
Of particular importance, the blade X must be
opposite the chipper blade or it will hit the
chipper blade bolts when it rotates on its own
shaft.
IMPORTANT:
CHECK THE ROTOR ASSEMBLY FOR LOOSE BOLTS &
CRACKED, WORN OR BENT PARTS AFTER EVERY 20
HOURS OF USE OR AFTER IMPACT WITH A FOREIGN
OBJECT.
REPLACE WORN OR DAMAGED PARTS.
SPACER
No.
LENGTH
(mm)
PART
No.
No. PER
1
18
536043
2
2
36
536042
2
3
51
536045
4
4
51
536044
2
