Drive system diagram
Part #STD581075
Replaced by #812000029
Electrical system diagram
Part #21064
Replaced by #532365402
Drive system diagram
Part #90589
Replaced by #532122075
Mower housing diagram
Part #37X57
Replaced by #37X57MA
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Mower housing suspension diagram
Part #31X4
Replaced by #703300
Part #STD533107
The manufacturer no longer makes this part, and there's no substitute part
Electrical system diagram
Part #91275
Replaced by #691959
Mower housing diagram
Part #55962E700
Replaced by #455962MA
Mower housing diagram
Part #91178
Replaced by #420613MA
Part #STD541431
The manufacturer no longer makes this part, and there's no substitute part