Spearhead
Multi-Cut
420
10
Operation
Once ready for work with the wings unfolded, raise the mower clear of the ground
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. As indicated by the decal on top of the
centre guard and not the number of splines on the P.T.O shaft. Lower the machine
onto the ground, select a sensible forward speed bearing in mind the density of
growth, the terrain, the available horsepower and proceed. If at any time serious
vibration occurs,
stop the engine immediately and check the blades, following all
safety precautions
.
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. 5).
Whilst mowing it is possible to continue working when turning the 420 Rotary Cutter
on the headlands, however we recommend the machine is slightly raised to prevent
the skids marking the ground and reduce the wear on the skids.
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. 5 contours of the ground
