Part #STD533107
The manufacturer no longer makes this part, and there's no substitute part
Part #20613
Replaced by #420613MA
Upper half diagram
Part #17X102Z
Replaced by #703128
Part #10851Z
Replaced by #10851ZMA
Mower housing diagram
Part #20551
Replaced by #492574MA
Mower housing diagram
Part #37X12
Replaced by #37X12MA
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Mower housing diagram
Part #21189
Replaced by #166X4MA
Lower half diagram
Part #30X49
Replaced by #30X49MA
Mower housing diagram
Part #28X23
Replaced by #703948
Upper half diagram
Part #26X214
Replaced by #26X214MA