19 Troubleshooting
MAN1256 (3/23/2018)
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
Does not cut Dull blades Sharpen blades.
Worn or broken blades Replace blades. (Replace in pairs only.)
Incorrect PTO speed Set at rated PTO speed.
Ground speed too fast Reduce ground speed.
Drive not functioning (blades do not turn
when PTO is running)
Check drive shaft connection.
Check gearbox.
Gearbox malfunction Repair gearbox.
Excessive clutch slippage Adjust clutch.
Incorrect blade direction Check to be sure blade edge is correct for
direction of rotation.
Streaks or ragged cut Broken or worn blades Replace or sharpen blades.
Attitude incorrect Level machine.
Ground speed too fast Reduce ground speed.
Excessive cutting height Lower cutting height. (Note: Set height so
blades do not frequently hit ground.)
Excessive lush and tall vegetation Recut at 90° to first pass.
Excessive side skid wear Running with skids continuously on
ground
Raise cutting height or adjust.
Excessive clutch slippage Clutch out of adjustment Adjust clutch.
Clutch discs worn; wear stops contacting
opposite plate
Replace discs.
Blades hitting ground Raise cutting height.
Vibration Broken blade Replace blades in pairs.
Bearing failure Check gearbox shafts for side play.
Hitch length incorrect Reset hitch length.
Universal drive Adjust pedestal bearing height to be paral-
lel to ground.
Blades hitting deck Bent blades or crossbar Replace bent blades or crossbar.
Blades hitting each other Side drive failure Retime blades, or replace rubber coupler
disks. See page 27.
Unit will not raise Low oil Add hydraulic oil.
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