Spearhead Multicut 300 - Troubleshooting; Irregular Cut Issues; Machine Noise & Vibration; Gearbox Problems

8999151EN: v1 11/03/2021
90
Original instructions (ENGLISH)
Website: www.spearheadmachinery.com
6 Troubleshooting
Symptom
Possible Cause
Remedy
6.1
Irregular cut
a) Worn, bent or broken
blades
Replace blades immediately as opposite pairs.
• Raise cutting height to avoid striking objects
• Remove/avoid obstacles such as rocks
• Check rotor speed
• Ensure steady initial starting of the machine
b) PTO input speed too
slow
Check PTO input speed and increase to maximum
indicated; see Section 2.5.1
c) Machine is not level to
the ground
Level the machine front to rear. See Section 4.5.1
d) Clogged material due to
excessive ground speed
Reduce tractor speed over ground and check correct
PTO input speed
6.2
Machine noise
a) Loose bolts
Check and tighten to the correct torque. See Section
5.7
b) Damage to a fabrication
or cracks
Repair fabrication in specialised, approved workshop
or replace component with genuine part
c) Vibration
See “Vibration” symptom heading below
d) Blade timing incorrect
Inspect the cutting area and following Section 5.4.7
disassemble and reassemble the blade carrier
assemblies with new components, if required
6.3
Gearbox noise
a) Lack of oil
Fill to level mark on gearbox
b) Worn gears
Replace gears with genuine Spearhead part
c) Worn bearings
Replace bearings with genuine Spearhead part
6.4
Vibration!
a) Lost/broken blades (see
6.5)
Replace all blades on that rotor
b) Bent gearbox rotor
Replace gearbox shaft and seals
c) Worn gearbox bearings
Replace bearings and seals
d) PTO speed too high
Reduce PTO speed to the correct operating speed
6.5
Broken/
damaged
blades
a) Blades striked object
Raise cutting height to avoid striking objects again
Remove/avoid obstacles such as rocks
b) PTO going too fast
Reduce PTO speed to the correct operating speed
c) Blades sped up too
quickly
Ensure a steady engagement into driving the PTO
with a low tractor engine speed
d) Excess play in blade
mounting
Worn blades bushes. Bolts loose, tighten to torque
setting as stated in Section 5.7
e) Blade timing incorrect
Replace broken parts and following Section 5.4.7
disassemble and reassemble the blade carrier
assemblies
6.6
Damaged/
worn blade
carrier
a) Blade carrier striked
object
Raise cutting height to avoid striking objects again
Remove/avoid obstacles such as rocks
b) PTO going too fast
Reduce PTO speed to the correct operating speed
c) Blade carrier sped up too
quickly
Ensure a steady engagement into driving the PTO
with a low tractor engine speed
d) Excess play in blade
mounting
Worn blades bushes. Bolts loose, tighten to torque
setting as stated in Section 5.7
e) Failure to keep tight
centre retaining nut
Tighten nut and secure with split pin
6.7
Damaged
gearbox
a) PTO shaft telescopic
guard bottoming out
Shorten the telescopic following the guidance in
Section 3.3.3
b) Engaged PTO drive with
too much speed
Ensure a steady engagement into driving the PTO
with a low tractor engine speed
c) Lack of grease on sliding
tubes of drive shaft
Remove and split the PTO shaft following guidance in
Section 5.2.2 and grease the two halves
6.8
Damaged
connecting
shafts
a) Blades sped up too
quickly
Ensure a steady engagement into driving the PTO
with a low tractor engine speed
b) Blade carrier striked
object
Raise cutting height to avoid striking objects again
Remove/avoid obstacles such as rocks