8999070: v3 03/09/2018
Page 6.7 of 6.10 pages
Original instructions (ENGLISH)
Website: www.spearheadmachinery.com
Check the rotor hub for slack. Some settlement may occur after the first hours of working. Re-tighten the
castle nut (2) one quarter of a turn at a time, and back off until the split pin can be fitted. Repeat until the
slackness is removed.
Check the blade
carrier mounting bolts for tightness. Refer to ‘Specific Torque Settings’; Section 6.14.
6.9
Blades
The blades must be inspected visually for wear each time before starting work. Replace blades when you notice an
increase in power demand or see that material is not being cut perfectly. Using the machine with blades that are not
sharp will have a negative effect on the quality of the work.
6.9.1
Replacing the blades
When the blades wear at a different rate or some are broken, they must be replaced immediately. The new blades
should be mounted in the identical position of the one to be replaced and should be of equal weight and length in order
not to jeopardise the balance of the whole machine.
WARNING!
When a blade needs replacing, it is best to replace the whole series. Failure to fit original tools
may cause the machine to vibrate abnormally.
WARNING!
When replacing blades
with the machine lifted off the ground, do not rely on the tractor’s hydraulic
lift to hold it up: wedge mechanical props or supporting trestles between the machine and the ground to stop
the machine dropping accidentally and posing a serious hazard.
WARNING!
Whatever the case, the cutting edge of the blade should face in the direction the rotor rotates.
The tractor should be switched off and the handbrake applied during blade replacement and the ignition key
should be with the operator. Blades must be removed and fitted, as illustrated in the figures below, by inserting
the bolt through the bush and tool, with the two washers threaded on either side, and fastening it with the
relevant nut, see Figure 6.9.
The cutting blades are mounted in hardened bushes and are free-swinging to reduce shock load and damage to the
transmission; see Figure 6.9 (4).
NOTE: The cutting blades on the left and right blade carriers are not interchangeable.
LH rotor blade shown, RH similar
Figure 6.10
ITEM NO.
DESCRIPTION.
1
Retaining Bolt
2
Blade
3
Retaining Nut
4
Hardening Bush
5
Blade Carrier
