Check Mower Blades - Gravely Pro-Turn 252 Operator's Manual

CHECK MOWER BLADES

Check blades for wear. Replace or sharpen
as needed.
CAUTION: AVOID INJURY. Use
sturdy gloves or padding to
protect hands when working with
mower blades.
Rotation of one blade rotates the
other blades.
Remove Blades
1. Place unit in service position. See
Service Position on page 23.
2. Disconnect spark plug wires.
See Figure 29.
3. Remove hardware retaining blades and
lower spindle guards to spindle and
remove parts. Retain all parts for
reinstallation.
4. Clean all grass, dirt and debris from
upper and lower spindle guards.
3
1. Mower Blade
2. Lower Spindle Guard
3. Upper Spindle Guard
Figure 29
Sharpen Blades
CAUTION: DO NOT sharpen
blades while attached to unit.
1. Remove blades. Discard blades if:
• More than 1.3 cm (1/2") of metal is
removed.
• Air lifts are eroded.
• Blades are bent or broken.
2. File or grind an equal amount of metal
DO NOT sharpen to this
pattern.
2
Sharpen to this pattern.
DISCARD if more than
1.27 cm (1/2")
1. Cutting Edge
2. Square Corner
3. Air Lift Erosion
2
4. Air Lift
1
3. Check blade balance by sliding an
EN - 27
from each cutting edge of the blade until
sharp. DO NOT change angle of cutting
edge or round the corner of the blade.
See Figure 30.
3
Figure 30
CAUTION: Unbalanced blades
cause excessive vibration and
eventual damage to unit.
Balance blades before
reinstalling on unit.
NEVER weld or straighten
blades.
unthreaded bolt through center hole. Hold
the bolt level. If blade does not remain
horizontal, sharpen the heavy end until
blade is balanced.
1
1
4