Alamo Eagle 20 - Manual (Page 164)

MAINTENANCE
Eagle 20 03/09 Maintenance Section 5-14
© 2009 Alamo Group Inc.
MAINTENANCE
BLADE SHARPENING
Always sharpen both blades at same time to maintain balance. Follow original sharpening pattern as shown in
FIGURE 11. Always sharpen blades by grinding. DO NOT heat and pound out edge. Do not sharpen blade to
a razor edge, but leave a 1/16" blunt edge. Do not sharpen back side of blade.
IMPORTANT: When sharpening blades, grind each blade the same amount to maintain balance. The
difference in blade weights should not exceed 1 ounce. Unbalanced blades will cause excessive vibration
which can damage gear box bearings. Vibration may also cause structural cracks in cutter housing.
Never work under equipment supported by a hydraulic device because it may drop if the
control is actuated (even with the engine stopped) or in the event of hose failure, etc.
Always use a secure support for equipment which must be serviced while in the raised
position.
NOTE: Replace Blades in pairs after no more than 1/2" notch wear!
BLADE REMOVAL
To remove blades for sharpening or replacement,
remove the cover plate on deck of cutter near each
gear box. Remove locknut from blade bolt - note:
These are Left-Hand Threads. Inspect lock nut after
removal and replace if threads are damaged.
Always replace nut when replacing blade bolt.
When installing blades, be sure to check blade bolt
pivot diameter for wear. Replace bolt if worn more
than 1/4" at any point. Install blade bolts with worn
side of bolt away from the center of the blade carrier.
Tighten lock nut to 300 ft. lbs.
Avoid personal injury. Blade
and/or blade carrier removal should be done only with the tractor engine shut off, key
removed, in neutral, parking brake on , PTO disengaged, and the cutter blocked in the
raised position.