Troybilt
Rear-Tine Tiller

Model #21A-634B063 Troybilt tiller

Here are the diagrams and repair parts for Troybilt 21A-634B063 tiller, as well as links to manuals and error code tables, if available.


There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Save to my profileOwner’s manual

Showing 10 of 137 parts

Lawn Tractor Screw

#3

Tine hood/drag bar Diagram

Lawn tractor screw

Part #710-0599
This item is not returnable
$3.59

In Stock

Lawn Tractor Bolt

#1

Wheels/tires/tine holder Diagram

Lawn tractor bolt

Part #710-3005
This item is not returnable
$2.51 | 
32% OFF MSRP:$3.70

In Stock

Screw

#4

Wheels/tires/tine holder Diagram

Screw

Part #710-0347
This item is not returnable
$3.02 | 
14% OFF MSRP:$3.50

In Stock

Lawn Tractor Screw

#21

Engine/belt cover Diagram

Lawn tractor screw

Part #710-0376
This item is not returnable
$2.54 | 
15% OFF MSRP:$3.00

In Stock

Lawn & Garden Equipment Bolt

#43

Engine/belt cover Diagram

Lawn & garden equipment bolt

Part #710-0157
This item is not returnable
$2.64

In Stock

Lawn & Garden Equipment Flat Washer

#30

Engine/belt cover Diagram

Lawn & garden equipment flat washer

Part #736-3090
This item is not returnable
$4.58

In Stock

Tiller Worm Shaft Oil Seal

#7

Transmission housing Diagram

$8.60

In Stock

Lawn & Garden Equipment Bolt

#25

Engine/belt cover Diagram

Lawn & garden equipment bolt

Part #710-3103
This item is not returnable
$2.78

In Stock

Bolt-hex 5/1

#5

Tine hood/drag bar Diagram

Bolt-hex 5/1

Part #710-3039
This item is not returnable
$5.13

In Stock

Washer

#33

Engine/belt cover Diagram

Washer

Part #GW-50027
This item is not returnable
$4.33

In Stock

Symptoms common to all tillers

Choose a symptom to see related tiller repairs.

Main causes: leaky engine head gasket, damaged sump gasket, damaged oil drain plug seal, loose or cracked fuel line, leaky carburetor seal
Main causes: broken shaft clevis pins, transmission failure
Main causes: worn or broken drive belts, bad transmission, clutch cable problems
Main causes: clutch cable problems, faulty transmission
Main causes: dirty carburetor, engine needs tune up, stale gas
Main causes: carburetor failure, bad gasoline, dirty spark plug, broken recoil starter
Main causes: damaged tines, broken clevis pins, worn drive belt, faulty transmission, clutch cable problems, improper depth-stake setting

Repair guides common to all tillers

These step-by-step repair guides will help you safely fix what’s broken on your tiller.

May 1, 2013
By Lyle Weischwill
How to replace a tiller recoil starter

The recoil starter spins the engine when you pull the starter rope, and the rope retracts when released. If the recoil starter assembly is broken, follow the steps in this repair guide to replace it.

Repair difficulty
Time required
 15 minutes or less

Articles and videos common to all tillers

Use the advice and tips in these articles and videos to get the most out of your tiller.

December 28, 2018

Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

By Sears PartsDirect staff

This chart will help you find the right carburetor for your Craftsman snowblower, tiller or log splitter.

November 1, 2016

A guide to garden tillers

By Sears PartsDirect staff

Rear tine tiller or front tine tiller, what to know to help in choosing the correct one for your needs.

November 1, 2015

Tiller common questions

By Sears PartsDirect staff

These frequently asked questions might help you figure out what's wrong with your garden tiller.