Mower deck diagram
Part #37X50
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
Steering system diagram
Part #55041
Replaced by #56236E701MA
Steering system diagram
Part #55386
Replaced by #55700MA
Part #24273
Replaced by #5021451SM
Mower deck diagram
Part #166X4
Replaced by #166X4MA
Mower deck diagram
Part #18X33
Replaced by #18X33MA
Part #10851Z
Replaced by #10851ZMA
Steering system diagram
Part #55003
Replaced by #55003MA