Spearhead MULTICUT
820
12
Operation
Once ready for work, raise the mower cutting height and slowly engage the PTO with
the
tractor engine at low revs to prevent shock damage to the machine. Slowly
increase the engine revs to achieve the recommended PTO speed of 1000r.p.m. If at
any time serious vibration occurs,
stop the engine immediately and check the
lades, following all safety precautions
. Select a sensible forward speed bearing in
mind the density of growth, the terrain, and the available horsepower.
The quality of finish is determined by the forward speed, i.e. a slow speed will
produce a high quality of cut, where as faster forward speeds are used when high
output is first priority.
When in work, always ensure the hydraulic spool valve that operates the folding of
the wings is in float position to enable the wings to freely follow all contours of ground
(Fig. 6).
Whilst operating it is possible to continue working when turning as the 820 Rotary
Cutter is fitted with a constant velocity joint on PTO shaft. However take care not to
run the rear tractor wheel against the mower draw bar as this will result in serious
damage to the tractor, the mower and, in particular, the PTO shaft. The constant
velocity joint on the input PTO shaft, allows the PTO to be left in gear whilst turning
out of work, e.g. on the headlands.
It is important not to turn sharply when the
machine is in work as this will over-strain and shorten the life of the constant
velocity joint.
When operating in confined areas it is possible to cut going backwards, but it is
advisable to slightly raise the machine, particularly if in scrub, where there is the risk
of hitting hidden solid obstacles obscured by dense undergrowth.
Always exercise particular care when operating over uneven ground surfaces. Do not
allow the blades and blade holder to frequently hit the ground.
Do not allow debris to build upon the cutting decks in dry conditions as this can be a
fire hazard, in wet conditions it will place unnecessary strain on the machine and may
foul the drive shaft causing damage.
Fig. 6 contours
of the ground
Warning
Do not run the machine with the wings raised. The risk of
debris and machine parts being ejected is greater as the
chain skirting is ineffective in this position.