Gravely Pro-Turn 200 - Page 29

EN - 27
Remove Blades
See Figure 28.
1. Stop engine, remove key and wait for
moving parts to stop and for hot parts to
cool.
2. Disconnect spark plug wires.
3. Remove hardware securing blades to
spindles and remove blades. Retain all
hardware for reinstallation.
Sharpen Blades
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
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 29.
3. Check blade balance by sliding an
unthreaded bolt through center hole. Hold
the bolt level. If blade does not remain
horizontal, sharpen the heavy end until
blade is balanced.
Install Blades
See Figure 28.
1. Install the blades onto spindles and
secure with bevel washers and bolts.
2. Torque bolts to 156 – 217 N•m
(115 – 160 lb-ft).
3. Reconnect spark plug wires.
CAUTION: DO NOT sharpen
blades while attached to unit.
Figure 28
CAUTION: Unbalanced blades
cause excessive vibration and
eventual damage to unit.
Balance blades before
reinstalling on unit.
NEVER weld or straighten
blades.
Figure 29
DO NOT sharpen to this pattern.
Sharpen to this pattern.
1. Cutting Edge
2. Square Corner
3. Air Lift Erosion
4. Air Lift
DISCARD if more than
1.27 cm (1/2")
1
1
2
4
3