Kubota T1880 Operator's Manual page 73

58 TROUBLESHOOTING
Excessive vibration.
Mower loads down machine.
Grass tips are jagged and turn grayish brown.
If you have any questions, contact your local KUBOTA Dealer.
If
A Debris on mower deck or in pulleys.
A Damaged drive belt or PTO belt twisted.
A Damaged pulleys.
A Pulleys out of alignment.
A Blades out of balance.
A Engine rpm too low.
A Ground speed too fast.
A Debris wrapped around mower spindles.
A Blades dull.
A Blades worn.
A Mower deck is not level.
Check