Spearhead AG18, Handbook

Page: 47 / 52

Page 9.1 of 9.1 pages Original instructions (ENGLISH)
Website: www.spearheadmachinery.com
9 Trouble shooting
Trouble shooting
– Rotary mower issues
Symptom Possible cause Remedy
9.1 Machine vibration.
Missing Blades Replace opposite blades as pairs
Broken Blades Replace opposite blades as pairs
Wrong PTO speed
Check that a 540rpm machine is not run
at 1000rpm
9.2
Blades touching one
another.
Blades are out of timing
Re index the blades but check that there
are no teeth failures within the gearbox
9.3
PTO shaft not transmitting
power.
Slip clutch if fitted slipping
Re set the clutches as per the instruction
book
Shear bolt failed if fitted
Replace the shear bolt after checking that
the correct grade is being used
Check that the shear surfaces are still
square and not rounded.
Check that shear bolts are tight.
9.4 Uneven cutting height.
Machine not set level with
ground Stop the machine and set the machine as
shown in the instruction book
9.5 Machine not cutting. Blades not fitted to suit rotation
Check the blade rotation suits the cutting
edge of the blade
9.6 Leaking gearbox.
Oil level too high Reduce the oil level to the level plug
Wrong oil grade
Check instruction book for the correct
grade
Faulty breather Replace the breather
Wrong breather alignment with
crown wheel
Rotate the cover with the breather so the
breather is off set to the crown wheel
9.7 Rapid blade wear. Cutting too low
Set the machine for sensible cutting
height
9.8
Blades hitting the machine
sides.
Worn pivot collars and bolts
Replace any worn collars and or bolts.
Remember to replace lock nuts at the
same time.
9.9
Breakout system if fitted
not working.
Machine will not break out
If hydraulic check that the tractor valve is
in “float” whilst cutting.
9.10
Machine will not “float”.
Poor setting of any balance
spring(s) Reset any balance spring as per the
instruction book
9.11
Wings, if fitted, will not
drop or do so reluctantly.
Twisted wing PTO shafts
Reset “frozen” wing PTO shafts and
replace the PTO shaft drive tube
9.12 Loss of drive to one axle.
Drive shaft or gearbox tooth
failure Replace damage parts and check slip
clutches and or shear bolt grade/size