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Troubleshooting
Fault
Machine is getting blocked
Leaves a streak of uncut or
partially cut grass
Material discharges from
mower unevenly; bunches
of material along with swath
Gearbox overheating
Blade/bullets is scalping
ground
Mower will not cut.
Blades/bullets wear too fast
Mower seems to require
excessive power
Excessive vibration
Cause
Material too high or too much material
Grass is too wet
Worn or dull blades
Blades dull or bent
Carrier RPM too low
Oil flow rate is too low (hydraulic driven machines)
Field conditions are so wet that the tractor tyre is pushing
grass into mud
Ground speed too fast
Possible build-up materials under mower
Blades mounted incorrectly (cutting edge against direction
rotation)
Material too high and/or too much material
Low on lubricant
Improper type lubricant
Excessive grass / debris build-up around gearbox
Mower too low
Field is ridged
Field is too wet
Shear bolt sheared
Cutting in sandy conditions
Cutting in rocky conditions
Blades hitting ground
Advancing into grass too rapidly
Hitting ground
Worn or dull blades
Tractor not large enough
Check gearbox bolts
Check for loose nuts on blades
Blade broken
New blade or bolts matched with worn blade or bolts
Drivelines not phased correctly. Implement and tractor yokes
must be in line
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Remedy
Reduce the ground speed but maintain required
rpm from the PTO input
Reduce the ground speed but maintain required oil
flow rate (hydraulic driven machines)
Stop and wait until grass is dried
Sharpen or replace blades
Sharpen or replace blades
Use correct PTO speed
Increase the oil flow rate but do not exceed the
maximum rate permitted
Too wet to mow. Stop operation and wait until grass
is drier
Reduce ground speed by shifting to a lower gear
Clean mower
Change blades so that cutting edge is facing correct
rotation.
Reduce ground speed but maintain the
recommended RPM at tractor PTO or make two
passes over material. Raise mower for the first
pass and lower to desired height for the second and
cut a 90 degree angle to first pass
Reduce ground speed but maintain the
recommended oil flow rate or make two passes
over material. Raise mower for the first pass and
lower to desired height for the second and cut a
90 degree angle to first pass (for hydraulic driven
machines
Fill to proper level
Replace with proper lubricant
Remove grass, etc from machine
Raise mower-reset wheels
Cut field at a different angle
Stop and wait until it is dried
Install new shear bolt
Increase cutting height
Increase cutting height
Increase cutting height
Reduce forward travel speed
Raise mower and reset wheels
Sharpen or replace blades
Use larger horsepower tractor
Tighten if loose
Tighten if loose
Replace blades, in set
Replace blades or bolts in sets
Phase the driveline. Replace if necessary
17
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