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Troubleshooting
To avoid injury from unexpected start up, disconnect
spark plug wire before you service your unit.
Problem
Cutters wearing
unevenly/prematurely
Cutters shaft breakage
unevenly/prematurely
Drum wearing prematurely
or cracking
Excessive vibration
Machine jumps erratically
Drive belt wearing prema-
turely
Drum Engagement Lever will
not raise/lower
Drum Adjustment Dial will
not turn
Uneven cutting
3A5578C
Cause
Drum is too low
Material build-up
Cutters too tightly loaded
Wrong cutters for application
Drum is too low
End plates or bushings worn
Shafts worn
Wrong cutter set up
Over 40 hours service life
Drum hitting ground
Shafts and bushings not replaced within 40
hours
Bearing worn
Hex bushing worn
Drive shaft worn
Improper cutter setup
Drum contacting ground
Wheels worn out
Drum hitting ground
RPM is too low
Surface is severely uneven
Pulley is misaligned
Wrong belt
Drum is contacting the surface
Drum Adjustment Dial is set too high or low.
Threads are dirty or not greased.
Linkage may be bent
Cutting too deeply
Rear wheel fork is bent
Solution
Raise drum
Clean the cutters
Remove some spacers or cutters from shafts
See 17X074 (Surface Profile Chart)
Raise drum
Replace the end plates and/or bushings
Replace the shafts
www.graco.com/drumassembly
Visit
proper setup
Replace shafts and bushings
Raise drum
Replace shafts and bushings
Replace worn bearing
Replace hex bushing
Replace drive shaft
www.graco.com/drumassembly
Visit
proper setup
Raise drum
Replace wheels
Raise drum
Increase engine RPM
Move to smoother surface
Align pulleys/belt. See page 29.
Replace with correct belt
Raise drum
Raise or lower Drum Adjustment Dial
Clean and grease the threads
Replace linkage
Raise drum
Replace rear wheel fork
Troubleshooting
for
for
33
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