Replacement parts drive system diagram
Part #90589
Replaced by #532122075
Replacement parts blade housing diagram
Part #37X57
Replaced by #37X57MA
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Part #STD533107
The manufacturer no longer makes this part, and there's no substitute part
Part #20613
Replaced by #420613MA
Replacement parts steering system diagram
Part #55386
Replaced by #55700MA
Part #24273
Replaced by #5021451SM
Replacement parts steering system diagram
Part #55746
Replaced by #56236E701MA
Replacement parts drive system diagram
Part #21521
Replaced by #17X160MA
Replacement parts blade housing diagram
Part #166X4
Replaced by #166X4MA
Part #55449
Replaced by #1753233YP