MacDon R85 Rotary Disc 13 Foot Self-Propelled Windrower Header - Manual (Page 133)

MAINTENANCE AND SERVICING
8. Remove nut (A).
9. Remove shoulder bolt (B) and blade (C).
10. Install new or reversed blade (C) with shoulder bolt (B)
onto disc.
NOTE: Ensure shoulder bolt is fully engaged into
blade before tightening nut.
NOTE: Ensure blade is installed correctly to suit
rotation of disc. Refer to Figures
• 7.30: Counterclockwise Disc Rotation
Direction, page 123
• 7.31: Clockwise Disc Rotation
Direction, page 123
If you are unsure which direction the
spindle rotates,
see Section 7.6.3
Direction of Spindle Rotation, page 121 .
11. Install nut (A). Tighten nut to 100 ft·lbf (135 N·m).
12. Remove block of wood (if used).
WARNING
Ensure cutterbar is completely clear of foreign
objects.
These objects can be ejected with
considerable force when the machine is
started and may result in serious injury or
machine damage.
13. Close cutterbar doors. See Section 5.5 Cutterbar
Doors, page 30 .
Figure 7.33
Inspecting Cutterbar Hardware
Check blade attachment hardware each time blades are replaced. See Replacing the Cutter Blades, page 124 for
replacement procedure.
Check bolts for wear or damage and replace bolt if:
• Bolt has been removed and installed five times.
• Head is worn flush with bearing surface of blade.
• Diameter of bolt neck is worn out of specification.
• Bolt is cracked.
• Bolt is visibly distorted.
• Evidence of interference with adjacent parts.
Check nuts for wear or damage and replace nut if:
• Worn height is less than half total height.
• Nut is cracked.
• Nut has been removed and installed five times.
169455
125
Rev. E