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Posted by willshak on May 26, 2008, 3:16 pm
on 5/26/2008 8:26 AM George Abbot said the following:
> My guess is that one mandrel assembly is out of alignment on my one
> year old craftsman 20hp 42" model 917.27682.
>
> It was scalping the lawn when going over bumps at low heights. I
> thought it was a bent blade but did the same with a new blade.
>
> I removed the deck and did some tests. One blade is at the same depth
> when rotated 360 (so works fine) while the other is low on one blade
> tip and high on the other. It is slightly beyond the edge of the
> bottom of the deck, so obviously will scalp the lawn if the deck
> bottoms out.
>
> If the blade is removed and replaced about 180, the low/high reverses.
>
> If the blades are swapped, the low/high is still about the same on the
> same mandrel.
>
> I noticed that there are four bolts around the pulley/blade drive
> assembly and wonder if the alignment can be corrected?
Are they tight? Perhaps some came loose causing the belt to pull the
pulley to one side.
> I know I can probably shim it at the blade to get it into alignment,
> but is there another fix?
>
> Or is it beyond repair? I am reluctant to replace the pulley assembly
> in case the deck itself has an alignment problem.
>
> Unfortunately, the machine did not come with a IPB of the mower deck,
> only the tractor, so I cannot figure out just what is involved in the
> pulley/blade drive assembly.
>
> Any help appreciated.
>
> GA
--
Bill
In Hamptonburgh, NY
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