MAINTENANCE 9
60
9.18 INSPECTING BLADES ______________________________________________________
Every 50 hours of operation or when the cutting unit is removed
from the mower, carefully inspect the blades to make sure the
blades are in good condition. Replace any blade that has
bends, grooves or cracks.
A bent blade can have a small crack that can increase and cause a piece of the blade to break. The bent blades can
cause vibration and other stress on the mower.
The dust or sand particles can wear a dangerous groove in the blade between the air vanes and the flat part of the
blade. The groove can quickly increase in size and allow a piece of the blade to break.
9.19 SHARPENING BLADES _____________________________________________________
Put a wooden block between the blade and cutting unit housing
to prevent the blade to rotate.
When you prepare or sharpen the blade, do not follow the original grind pattern. Grind new cutting edges at an angle. If
the maximum of one half inch (1.3 cm) blade loss has occurred, do not sharpen more, replace the blade.
To prevent a blade that is not balanced, make sure an equal amount of material is removed from both ends of the
blades. A blade that is not balanced will cause vibration and can damage the mower. Use a blade balancer to check the
blade after you sharpen.
Torque center blade bolt to 67 to 83 ft.Lb. (91 to 112 Nm).
CAUTION
Be careful when you check blades to prevent pinching
hands and fingers between ends of the blades.
WARNING
Never try to correct or repair a damaged blade. Always
replaced a damaged blade.
The bends, grooves or cracks can cause a piece of the
blade to become loose and be discharged from the mower.
The broken blade pieces can cause injury to persons or
property damage.
WARNING
The cutting unit blades can have sharp edges. To prevent
injury, use caution when you service or hold the blade.
When you remove more than one half inch of material, the
blade tip can break and be discharged from the mower. The
broken blade pieces can cause injury to persons or property
damage.
Normal
Blade
Bent
Blade
Grooved
Blade
Cracked
Blade
!
!
Maximum
1/2 in.
(1.3 cm)
!
Summary of Contents for R311T-T4F
Page 13: ...SPECIFICATIONS 4 12 A K B J H C F D G E L ...
Page 83: ...NOTES 13 82 13Notes ...
