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Shearbolt Replacement
1. Slide yoke shield back.
2. Drive out sheared bolt with hammer and punch.
3. Align holes and install new shear bolt.
4. Slide yoke shield securely in place
IMPORTANT
Fit PTO shaft with the shearbolt end connected to the Topper as directed on the PTO guarding
Use only genuine MAJOR replacement shear bolts. M8X50 BZP -8.8
Maintenance Schedule
Grease the following:
INITIALLY
8 HOURS
PTO shaft yoke ends
●
●
Carrying arm pivots
●
●
Lubricate moveable mechanical joints when required.
All nuts and bolts in the transmission including rubber couplings, star drives, PTO shafts and gearboxes should be
checked for tightened after mowing at the following intervals.
1st 50 Acres
1st 100 Acres
1st 250 Acres
And every 250 acres thereafter.
NOTE: ENSURE BLADE ROTATION AND TIMING IS CORRECT AFTER SERVICING TRANSMISSION.
Trouble Shooting
Fault
Cause
Remedy
Leaves a streak of
uncut or partially cut
grass
Blades dull or bent
Replace blades
Carrier RPM too low
Use correct PTO speed
Field conditions are so wet that the tractor tire is pushing
grass into mud
Too wet to mow. Stop operation and wait until it is drier
Ground speed too fast
Reduce ground speed by shifting to a lower gear
Grass is down from previous weather conditions
Mow in only one direction
Possible build-up materials under mower
Clean mower
Blades mounted incorrectly (cutting edge against direction
rotation)
Change blades so that cutting edge is facing correct rotation.
Material discharges
from mower unevenly;
bunches of material
along with swath
Material too high and too much material
Reduce ground speed but maintain 540rpm 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
Grass wet
Allow grass to dry before mowing. Slow ground speed of
tractor but keep engine running at full PTO rpm.
Gearbox overheating Low on lubricant or improper type lubricant
Fill to proper level or replace with proper lubricant
Excessive grass / debris build-up around gearbox
Remove grass, etc from machine
Blade is scalping
ground
Mower too low
Raise mower
Field is ridged
Cut field at a different angle
Field is too wet
Stop and wait until it is dried
Mower will not cut.
Shear bolt sheared
Install new shear bolt
Blades wear too fast
Cutting in sandy conditions
Increase cutting height
Cutting in rocky conditions
Increase cutting height
Blades hitting ground
Increase cutting height
