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Maintenance Section 4-17
MAINTENANCE
ROTARY KNIFE REPLACEMENT
1 – Be sure you have a complete matching set of new knives for replacement.
2 – Remove knives and inspect holes for damage. Also watch for cracks in the disk
around the holes.
3 – Lube threads with anti-seize, motor oil or grease. Install bolt through knife and
disk from bottom side of disk. Install new self-locking nuts and torque them to
800 oiled ft. lbs.
4 – The knives should swing freely to absorb shocks from impact when striking
objects.
WHEN CUTTING HEAVY BRUSH, KNIFE BOLTS SHOULD BE
NSPECTED HOURLY AND RETORQUED TO 1070 dry or 800 oiled
FT. LBS.
INSPECTION OF ROTARY KNIVES
Failure to follow the following warnings and instructions may result
in serious injury or damage to the equipment or property!
1 –
DO NOT weld on the knife or bolts. Damaged or worn knives must be replaced.
2 – Knife must be replaced in sets. Knives with unequal wear may cause serious
vibration and resulting structural damage to the mower.
3 – The self-locking nuts for the knife mounting bolts must NOT be reused. If the
self-locking nut is removed from the knife mounting bolt, the nut must be replaced
with a new self-locking nut.
4 – Inspect the condition and tightness of the knife mounting bolts and disk mounting
bolts daily.