Spearhead EXCEL 470, Handbook

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Spearhead Excel
470
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H H H Hydraulic ydraulic ydraulic ydraulic C C C Controls ontrols ontrols ontrols – – – – C C C Cutting utting utting utting P P P Position osition osition osition
The cutting head must at all times be lowered gently into the cutting position. Never ‘drop’
a flail head into a hedge at speed. When cutting at ground level (grass etc.) the head
must be lowered gently to give a slight contact pressure of roller to ground.
WARNING WARNING WARNING WARNING
:
Ensure flail head does not come into contact with obstacles such as rocks, stones,
stumps etc. Keep rotor away and free from wire, as to entangle wire in a rotor is both
dangerous and costly. Should large obstacles be encountered or wire become entangled
in the rotor stop immediately and reset or clear before continuing
.
DANGER DANGER DANGER DANGER WARNING WARNING WARNING WARNING
Always stop machine, switch off engine and pocket the key before Always stop machine, switch off engine and pocket the key before Always stop machine, switch off engine and pocket the key before Always stop machine, switch off engine and pocket the key before
attempting attempting attempting attempting to remove any items that foul the flail to remove any items that foul the flail to remove any items that foul the flail to remove any items that foul the flail head. head. head. head.
Normal obstacles and level variations should be overcome by the operator slowing
'forward motion' and raising/lowering the booms of trimmers to suit.
C
C C
Cutting Head
utting Head utting Head
utting Head
The cutting head rotor has been balanced prior to fitting; this will ensure a vibration free
cutting unit.
Should the rotor become blocked for any reason, hit an obstacle, loose a blade or blades,
the rotor may be put into a state of unbalance. This will result in vibration from the rotor
being transmitted through the head. Should this happen stop immediately, as to
continue may have serious consequences.
Once stopped clean rotor and check for loss of blades and bolts, replace as required.
As a result of hitting solid objects with serious force the rotor can be bent, this will
obviously cause vibrations. In such cases the only answer will be to get the rotor
repaired/rebalanced or replaced.
Keep the cutting blades VERY SHARP: the flail head should be inspected daily. Bolts and
nuts holding flails to rotor should be checked frequently and kept tight. Missing or broken
flails should be replaced immediately, as the imbalance will rapidly harm bearings and
structure. When a flail is renewed its opposing flail (or pair if using Back to Back flails)
should be renewed also in order to maintain balance.
Check ‘vee’ belt tension on cutter head daily: a load of 5Kgs (10 lbs.) should give a
deflection of 9mm at these pulley centres. Access to the belts is by removing the guard
panel on the side of the drive end. Tension is adjusted by first slackening the bolts
mounting the motor (nuts are held from turning on the inside). The nuts on the
threaded
adjuster can now be turned to give the required tension and then re-tightened and the
motor mounting bolts then tightened also.