Alamo GR72 User Manual

GR60/72   02/07

Operation Section 4-41

© 2007 Alamo Group Inc.

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.