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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.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 50 parts  |
Spring Pin 31138D
#9

Universal ass'y diagram

Spring pin

Part #31138D

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

Washer 31138C
#11

Universal ass'y diagram

Washer

Part #31138C

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

Input Shaft 12484
#8

Gear box and rotor ass'y diagram

Input shaft

Part #12484

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 Pin 12452
#1

Lift, shroud & tail wheel ass'y diagram

Lift pin

Part #12452

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

Main Housing 12486
#10

Gear box and rotor ass'y diagram

Main housing

Part #12486

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

Output Shaft & Pinion 12487
#11

Gear box and rotor ass'y diagram

Output shaft & pinion

Part #12487

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

Bearing Retainer Cap 12491
#15

Gear box and rotor ass'y diagram

Bearing retainer cap

Part #12491

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.

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

Main causes: clutch cable problems, faulty transmission…

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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…

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Why won't my tillers wheels or tines turn?

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

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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…

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

Main causes: broken shaft clevis pins, transmission failure…

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

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

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Why won't my tiller's engine start?

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

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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.

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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…

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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.

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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.…

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Top questions about Sears and Sears PartsDirect

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

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

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

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