AVANT A35965, Operator'S Manual For Attachment

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7.3 Sharpening and replacing the cutting blades
The blades wear down during normal use and the condition of the blades should be checked after every few
uses.If the mowing deck is clean, signs that point to dull or damaged blades include the following:

Decreased quality of cut, resulting in uneven cutting, torn grass, or yellowish grass after mowing

Decreased performance / increased power requirement

Increased vibration or noise
Evenly worn blades can be sharpened, but if there are deep notches, cracks, rock impact marks or similar
signs of damage, the blades must be replaced with new ones. To retain balance, sharpen all blade surfaces in
the same manner.
Do not sharpen the blades too sharp, as knife like sharpened blades will wear down very quickly. Note that the
blade temperature should remain as steady as possible during sharpening; excess heating during sharpening
will weaken the strength and wear resistance of the steel. Check the balance of the blades after sharpening.
Only use blades identical to the original ones; use only original spare parts.Note the length of the blade
sharpening area as indicated in the figure below.
A33205
If the blades have large notches or cracks, or if they have worn down excessively, they
must be replaced. Always use good protective gloves when handling the blades.
WARNING
Risk of cutting - Use protective gloves when handling the blades. Sharp blades can
cause serious injuries. Make sure that the mower is properly supported during inspection
and when replacing the blades.
WARNING
Risk of ejected parts - Make sure that all blades are connected securely. Check that
all blades are connected securely and that none of the blades is missing. Loose,
damaged, or missing blades can cause ejection of parts from the mower. Only use
locking nuts for fastening the blades.
7.3.1 Fastening of the blades
The blades are connected with a a central bolt and two shear bolts. To protect the blades and the bearings of
the mower, the shear bolts break or bend if the blades hit a rock other heavy obstacle.
The shear bolts and the timing of the blades must be checked after the blades collide heavily with an obstacle.
The shear bolts must be replaced with new ones when they show signs of deformation.