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TonyI

Hydro lost pulling power

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Thor27

I wouldn't think so unless you had a complete bearing failure in the mule, even then a m18 would just smoke the belt.   I'd be more inclined to agree with its being a loose engine ground, or a chaffed wire by the lever. The safety switches should only come into play when cranking.

Edited by Thor27

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peter lena

@TonyI  agree with others on possible electrical connection issues . that back fire issue on deck engagement , is telling you any thing electrically related  is probably your cause. also look for chafed wiring that suddenly shows' up with engine loading . my experience is old cracked / corroded /  chaffed, shorted wires , probably is your issue. have any small alligator wire jumpers ?  used those many times to verify wire runs , backtracking , found the related shorting spot, hope you find it , pete   

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Lee1977

There are two switches they are stacked with insulators plastic beloe and between them. Those plastic insulators were both completely covered in rust on my 520-H that may cause a short between the two switched  when the PTO is engaged.

Both switched are bolted to a metal bracket that is fasten with one bolt.

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