Check Mower Blades - Gravely Pro-Walk Gear 32GR 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 18.
2. Disconnect spark plug wires.
See Figure 21.
3. Remove hardware securing blades to
spindles and remove blades. Retain
hardware for reinstallation.
4. Clean all grass, dirt and debris from
upper and lower spindle guards.
Figure 21
Sharpen Blades
CAUTION: DO NOT sharpen
blades while attached to unit.
1. Remove blades from unit. 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
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 22.
DO NOT sharpen to
this pattern.
2
Sharpen to this
pattern.
DISCARD if more than
1.3 cm (1/2")
1. Cutting Edge
2. Square Corner
3. Air Lift Erosion
4. Air Lift
CAUTION: Unbalanced blades
cause excessive vibration and
eventual damage to unit.
Balance blades before
reinstalling on unit.
NEVER weld or straighten
blades.
3. Check blade balance by sliding an
unthreaded bolt through center hole. Hold
the bolt level.
NOTICE: If blade does not remain horizontal,
sharpen the heavy end until blade is
balanced.
Install Blades
CAUTION: Mating surfaces
between spindle, lower spindle
guard, blade and washer MUST
be free of debris to ensure
correct tightness and alignment.
1. Secure blades to spindles with washers
and hex bolts removed earlier. Torque to
163 N•m (120 lb-ft). See Figure 21.
2. Reconnect spark plug wires.
EN - 20
1
1
3
4
Figure 22