Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Tips to find your model number
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Craftsman
Tiller

Model # 74778551 Official Craftsman rotary chopper

Here are the diagrams and repair parts for Official Craftsman 74778551 rotary chopper, 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.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 50 parts  |
Wheel Spacer 12466
#11

Lift, shroud & tail wheel ass'y diagram

Wheel spacer

Part #12466

The manufacturer no longer makes this part, and there's no substitute part

Plain Yoke 12499
#3

Universal ass'y diagram

Plain yoke

Part #12499

The manufacturer no longer makes this part, and there's no substitute part

Tube Weld't 12460
#9

Lift, shroud & tail wheel ass'y diagram

Tube weld't

Part #12460

The manufacturer no longer makes this part, and there's no substitute part

Washer 25680
#10

Lift, shroud & tail wheel ass'y diagram

Washer

Part #25680

The manufacturer no longer makes this part, and there's no substitute part

Oil Seal 12477
#1

Gear box and rotor ass'y diagram

Oil seal

Part #12477

The manufacturer no longer makes this part, and there's no substitute part

Side Housing 12478
#2

Gear box and rotor ass'y diagram

Side housing

Part #12478

The manufacturer no longer makes this part, and there's no substitute part

Slip Universal 31062
#13

Universal ass'y diagram

Slip universal

Part #31062

The manufacturer no longer makes this part, and there's no substitute part

Gasket 12490
#14

Gear box and rotor ass'y diagram

Gasket

Part #12490

The manufacturer no longer makes this part, and there's no substitute part

Bearing 12485
#9

Gear box and rotor ass'y diagram

Bearing

Part #12485

The manufacturer no longer makes this part, and there's no substitute part

Lift Link Weld't 12456
#4

Lift, shroud & tail wheel ass'y diagram

Lift link weld't

Part #12456

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your tillers

Choose a symptom to see related tiller repairs.

View all

Why do my tiller's tines turn but the wheels don't?

Main causes: clutch cable problems, faulty transmission…

Read more

Why does my tiller turn the soil poorly?

Main causes: damaged tines, broken clevis pins, worn drive belt, faulty transmission, clutch cable problems, improper de…

Read more

Why won't my tillers wheels or tines turn?

Main causes: worn or broken drive belts, bad transmission, clutch cable problems…

Read more

Why does my tiller's engine leak oil or gas?

Main causes: leaky engine head gasket, damaged sump gasket, damaged oil drain plug seal, loose or cracked fuel line, lea…

Read more

Why do my tiller's wheels turn but the tines don't?

Main causes: broken shaft clevis pins, transmission failure…

Read more

Why does my tiller's engine run roughly or misfire?

Main causes: dirty carburetor, engine needs tune up, stale gas…

Read more

Why won't my tiller's engine start?

Main causes: carburetor failure, bad gasoline, dirty spark plug, broken recoil starter…

Read more

Most common repair guides to help fix your tillers

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

View all
How to replace a tiller recoil starter

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 s…

Read more
Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your tillers

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

View all
How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Read more
Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

Read more
A guide to garden tillers

A guide to garden tillers

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

Read more

Parts & More