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15. TROUBLESHOOTING GUIDE
Problem
Excessive Vibration
Not Cutting Clean
SX15 01/09
© 2009 Alamo Group Inc.
OPERATION
Possible Cause
Check gearbox bolts.
Check for loose nuts on
bladeholder and blades.
Check for bent output shaft. If
shaft is bent, oil will normally
leak from bottom seal.
Check to see if blades are
swinging.
Check for even wear on each
blade tip. Were both blades
changed at the same time?
Blade broken.
Blade carrier bent.
Blade hub not properly seated
on shaft.
New blade or bolts matched with
worn blade or bolts.
Drivelines not phased correctly.
Implement & tractor yokes must
be in line.
Blades dull.
Blade rotation incorrect.
Carrier RPM too low.
Mower not level.
Tractor tires mashing down grass.
Ground speed too fast.
Blades locked back.
Blades riding up due to blade bolt
wear.
Operation Section 4-45
Remedy
Tighten if loose.
Tighten if loose.
Replace shaft if bent.
Free blades so they swing.
Weigh blades. Weight should be within
1 oz. Always replace both blades.
Replace blades, in sets.
Replace carrier.
Remove hub, check tapered spline
shaft, clean and replace.
Replace blades or bolts in sets.
Replace driveline.
Sharpen or replace Blades.
Use correct blade for carrier rotation.
Use correct PTO speed and check for
correct gearbox ratio.
Adjust machine.
Move tires out of cutter overlap area.
Minimum 60" inside tires.
Reduce ground speed
Free blades.
Replace blade bolts.
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