36
TROUBLE SHOOTING
Problem
Possible Cause
Possible Remedy
Leaves a streak of uncut
or partially cut grass.
1. Rotary cutter not level, side
to side.
2. Blade dull or bent.
3. Blades unable to cut that
part of grass pressed by
path of tractor
4. Possible build up of
material under rotary
cutter.
1. Level 3-pt. hitch linkage on tractor.
2. Sharpen or replace blades.
3. Slow ground speed of tractor but keep engine
running at full PTO rpm. Cutting lower will help.
4. Clean rotary cutter.
Blade cuts grass lower in
center of swath than at
the edge.
1. Height of rotary cutter
lower at rear or at front.
1. Adjust rotary cutter height and altitude so that
rotary cutter rear and front are within 1/2” of
same height.
Material discharges
from cutter unevenly, or
discharges clumps of
grass.
1. Grass or brush may be too
high or thick.
2. Grass wet.
1. Reduce ground speed but maintain 540 rpm at
tractor PTO, or make two passes over material.
Raise rotary cutter for the first pass and lower
for the second pass, preferably cutting 90° to
the first pass. Raise rear of rotary cutter high
enough to permit material to discharge.
2. Allow grass to dry before mowing. Slow ground
speed of tractor but keep engine running at full
PTO rpm. Cutting lower will help.
Gearbox overheating.
1. Low on lubricant.
2. Improper lubricant type.
3. Excessive trash build up
around gearbox.
1. Fill to proper level.
2. Replace with proper lubricant.
3. Remove trash.
Rotary cutter will not cut.
1. Shear bolt sheared
1. Install new shear bolt. (Grade 2 Shear Bolt)
Excessive vibration.
1. Possible build up of
material on blade
2. Blades locked into
position.
3. Check for even wear on
each blade tip.
4. Broken blade.
5. New blade or bolts not
matched with worn blade
or bolts.
1. Clean blade pan.
2. Free blades so they swing free.
3. Weigh each blade. Weight should be within 1
oz.
4. Replace broken blade(s), Always replace in set.
5. Replace blades or bolts in sets.
Gearbox noisy.
1. Low oil in gearbox.
1. Check oil level. Add oil.
