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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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Browse Parts for
74778551 Rotary Chopper
#25
Gear box and rotor ass'y diagram
Cotter pin
Part #35031
The manufacturer no longer makes this part, and there's no substitute part
#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
#18
Gear box and rotor ass'y diagram
Rotor weld't
Part #12475
The manufacturer no longer makes this part, and there's no substitute part
#5
Lift, shroud & tail wheel ass'y diagram
Shroud weld't
Part #12450
The manufacturer no longer makes this part, and there's no substitute part
#8
Universal ass'y diagram
Pin
Part #31138B
The manufacturer no longer makes this part, and there's no substitute part
#5
Gear box and rotor ass'y diagram
Bearing
Part #12481
The manufacturer no longer makes this part, and there's no substitute part
#14
Universal ass'y diagram
Universal ass'y complete
Part #12498
The manufacturer no longer makes this part, and there's no substitute part
#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
#12
Gear box and rotor ass'y diagram
Spacer
Part #12488
The manufacturer no longer makes this part, and there's no substitute part
#12
Lift, shroud & tail wheel ass'y diagram
Grease seal
Part #31303
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.
Main causes: clutch cable problems, faulty transmission…
Main causes: damaged tines, broken clevis pins, worn drive belt, faulty transmission, clutch cable problems, improper de…
Main causes: worn or broken drive belts, bad transmission, clutch cable problems…
Main causes: leaky engine head gasket, damaged sump gasket, damaged oil drain plug seal, loose or cracked fuel line, lea…
Main causes: broken shaft clevis pins, transmission failure…
Main causes: dirty carburetor, engine needs tune up, stale gas…
Main causes: carburetor failure, bad gasoline, dirty spark plug, broken recoil starter…
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.
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…
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.
Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
This chart will help you find the right carburetor for your Craftsman snowblower, tiller or log splitter.…