Walker MT - Manual (Page 86)

82
Maintenance Instructions
REPLACING/REPAIRING
Mower Blades
Mower blades are removed and remounted as de-
scribed in Sharpen Mower Blades instructions.
During the course of sharpening and inspecting
mower blades, if there are any of the following
conditions of wear or damage, blades should be
replaced for reasons of safety and performance of
the machine:
•
An excessive amount of the flat section of the
blade has been ground away (removed) when the
blade is sharpened. Replace the blade when less
than a 3/4 in. (19 mm) flat section remains at the
blade tip.
•
Examine ends of the blade carefully, especially
the intersection where the flat section of the blade
turns up to form the “wing tip” (refer to Mower Blade
Profile for Sharpening illustration in Sharpen
Mower Blades instructions). Since sand and abra-
sive material can wear metal away in this area, the
blade should be replaced when metal thickness
has worn to 1/16 in. (1.6 mm) or less.
•
Check the blades for straightness by marking
blade tip position inside the deck housing and then
rotating the opposite end of the blade to the same
position and comparing. If the difference in blade tip
track is more than 1/8 in. (3 mm), the blade is bent
and should be replaced.
•
Inspect the blade surface, especially in formed
areas, for cracks. Replace the blade if any cracks
are found.
Reinstall the blades following procedure in
CHECKING/SERVICING for Sharpen Mower
Blades instructions. If blades are replaced, always
use Walker original equipment blades to ensure
safety and optimum performance. The quality and
performance of replacement blades offered by
other manufacturers cannot be guaranteed, they
could be dangerous.
DANGER
When blades are operated over sandy
soil, and if blades are allowed to wear, a
“slot” may be worn into the wing tip of
blade. Eventually a piece of the blade may
break off creating a serious potential for
injury or damage.
WARNING
DO NOT try to straighten a blade that is
bent. NEVER weld a broken or cracked
blade. ALWAYS replace with a new blade
to assure safety.
CAUTION
ALWAYS use genuine factory replacement
parts. Substitute parts CAN result in prod-
uct malfunction and possible injury to the
operator.