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Craftsman
Tiller

Model # 74778553 Official Craftsman rotary chopper

Here are the diagrams and repair parts for Official Craftsman 74778553 rotary chopper, as well as links to manuals and error code tables, if available.

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

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

Model diagram and schematic

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ALL PARTS
Showing 10 of 109 parts  |
Slip Universal 31138
#1

Pull type: universal assembly diagram

Slip universal

Part #31138

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

Input Shaft 31103A
#5

Lift & pull type: gear box and rotor diagram

Input shaft

Part #31103A

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

Input Flange Only 4306
#10

Lift & pull type: gear box and rotor diagram

Input flange only

Part #4306

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

Slip Universal 31139
#11

Pull type: universal assembly diagram

Slip universal

Part #31139

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

7/16" Shear Bolt W/nut N/P
7/16" shear bolt w/nut

Part #N/P

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

Bearing Cup 31305
#17

Lift type: shroud, lift, & pivot wheel diagram

Bearing cup

Part #31305

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

Woodruff Key 19405
Woodruff key

Part #19405

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

Yoke W/shaft Only 31138F
#12

Pull type: universal assembly diagram

Yoke w/shaft only

Part #31138F

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

Spindle Washer 31236
#25

Pull type shroud, axle & drawbar diagram

Spindle washer

Part #31236

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

Slip Universal 31060

#NI

All parts diagram

Slip universal

Part #31060

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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