Alamo GR72 Brush Cutter User Manual


 
OPERATION
GR60/72 02/07 Operation Section 4-41
© 2007 Alamo Group Inc.
OPERATION
Problem Possible Cause Remedy
Blades Wear Fast Cutting in sandy or rocky conditions Increase cutting height.
Blades too soft. Replace Blades with hardened,
high-quality, Rhino Blades from the
manufacturer.
Blade Bolts Working Loose Bolts not tightened. Tighten Bolts to 300 ft./lbs.
Bolt hole elongated or oversized. Replace Blade Carrier.
Locknut worn out. Replace Locknut.
Broken Cross or Cups Load too high for joint. Use protective device with joint.
Check joint angles and phasing.
Slow down ground speed or raise
Mower.
End Galling of Cross and Cups Speed too high. Reduce speed to 540 RPM.
Ears have deformed. Install thrust washer.
Needle Rollers Have Brinelled Load too high for joint. Check for small joint angles.
Into Cup and Cross Use Slip Clutch.
Check joint angles and phasing.
Shaft or Tube Twisted Over-loaded. Replace part and then slow down
ground speed or raise Mower.
Use protective device.
(See Clutch Maintenance).
Tube Broken in Welded Seam Over-loaded. Replace part.
(See Clutch Maintenance).
Yoke Broken at Ear Tip Over-loaded. Replace part.
Gearbox Noisy Improper backlash. Refer to Maintenance Section.
Rough gears. Run in or change Gears.
Worn Bearing. Replace Bearing.