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How do you know when to back lap your mower's reels? Look for the following conditions;
- Mowed grass looks uneven. This is a result of severely rounded reel blade and bedknife edges.
- Mowing leaves streaks of uncut grass. This condition results when one or more reel blades are bent, leaving too
much clearance between the reel and the bedknife. It also can result from reel blades or bedknives that are severely or
unevenly worn.
- Mowed areas are higher at one end of the cut than the other. This condition results from a con-shaped reel.
To minimize cost and labor and to maximize machine life, then, you should
back lap a machine with slightly dull reels. When back lapping doesn't work and give you the correct cut, it indicates
you may have more severe problems that may require further maintenance.
With back lapping, you coat the cutting surfaces with a lapping compound,
which resembles a mix of sand and grease. Some mowers offer back-lapping kits that allow you to back lap while the
cutting units are mounted on the mower.
Others require you to use a back lapping machine. Your owner's manual
can instruct you on how to properly attach your reel to the back lapping machine. But before you do so, make sure you
have a precise reel-to-bedknife adjustment with light contact.
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