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MTD
Rear-Tine Tiller

Model # 21AA404B031 Official MTD rear-tine tiller

Here are the diagrams and repair parts for Official MTD 21AA404B031 rear-tine tiller, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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Showing 10 of 113 parts  |
Yard Machines Lawn Tractor Flange Nut (replaces 00012173, Wd-129-103) 712-04065
#8

Handle & tine shield diagram

Yard machines lawn tractor flange nut (replaces 00012173, wd-129-103)

Part #712-04065

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$5.27 | 
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Yard Machines Lawn & Garden Equipment Nut 712-04064
Yard machines lawn & garden equipment nut

Part #712-04064

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Lawn Tractor Screw (replaces 01000628, 01000865, 1186307, 1186308, 791-180288, 791-683298, 910-0599) 710-0599
Lawn tractor screw (replaces 01000628, 01000865, 1186307, 1186308, 791-180288, 791-683298, 910-0599)

Part #710-0599

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Yard Machines Lawn & Garden Equipment Bell Washer (replaces 936-0242) 736-0242
#37

Handle & tine shield diagram

Yard machines lawn & garden equipment bell washer (replaces 936-0242)

Part #736-0242

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Tiller Wing Nut 712-0421
#9

Handle & tine shield diagram

Tiller wing nut

Part #712-0421

Replaced by #712-0421

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Manufacturer substitution
This part replaces 712-0421. Substitute parts can look different from the original.
This item is not returnable
$2.49 | 
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Lawn Tractor Spring (replaces 732-04276) 732-04276A
#15

Drive system diagram

Lawn tractor spring (replaces 732-04276)

Part #732-04276A

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Belt 1916657
#26

Drive system diagram

Belt

Part #1916657

Replaced by #954-04090

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Manufacturer substitution
This part replaces 1916657. Substitute parts can look different from the original.
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$25.18 | 
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Reverse Belt 1916658
#27

Drive system diagram

Reverse belt

Part #1916658

Replaced by #954-04091

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Manufacturer substitution
This part replaces 1916658. Substitute parts can look different from the original.
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$27.89 | 
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Sears Lawn Mower Roller Wheel 756-0625
#30

Drive system diagram

Sears lawn mower roller wheel

Part #756-0625

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$12.00 | 
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Lawn Tractor Hex Bolt 710-3008
Lawn tractor hex bolt

Part #710-3008

This item is not returnable
$4.62 | 
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