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Craftsman
Front-Engine Lawn Tractor

Model # 502255640 Official Craftsman 10-hp riding lawn mower

Here are the diagrams and repair parts for Official Craftsman 502255640 10-hp riding lawn mower, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 278 parts  |
E-ring STD581075
#49

Drive system diagram

E-ring

Part #STD581075

Replaced by #812000029

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Manufacturer substitution
This part replaces STD581075. Substitute parts can look different from the original.
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This item is not returnable
$3.50 | 
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Belt 37X50
#1

Mower deck diagram

Belt

Part #37X50

Replaced by #37X57MA

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Manufacturer substitution
This part replaces 37X50. Substitute parts can look different from the original.

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$36.81 | 
14% OFF Phone Price : $42.81
In Stock
Idler Pulley 20613
Idler pulley

Part #20613

Replaced by #420613MA

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Manufacturer substitution
This part replaces 20613. Substitute parts can look different from the original.
This item is not returnable
$25.18 | 
19% OFF Phone Price : $31.18
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Housing 24384
#42

Mower deck diagram

Housing

Part #24384

Replaced by #492574MA

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Manufacturer substitution
This part replaces 24384. Substitute parts can look different from the original.
$68.99 | 
8% OFF Phone Price : $74.99
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Washer 17X155
#46

Mower deck diagram

Washer

Part #17X155

Replaced by #17X166MA

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Manufacturer substitution
This part replaces 17X155. Substitute parts can look different from the original.
This item is not returnable
$22.49 | 
21% OFF Phone Price : $28.49
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Nut 15X100
#48

Mower deck diagram

Nut

Part #15X100

Replaced by #15X100MA

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Manufacturer substitution
This part replaces 15X100. Substitute parts can look different from the original.
This item is not returnable
$5.99 | 
14% OFF Phone Price : $6.99
In Stock
Cotter Pin 30X50
#14

Idler assembly diagram

Cotter pin

Part #30X50

Replaced by #703312

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Manufacturer substitution
This part replaces 30X50. Substitute parts can look different from the original.
This item is not returnable
$7.14
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Pin STD624003
Pin

Part #STD624003

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

Pulley 55452
#2

Mower deck diagram

Pulley

Part #55452

Replaced by #774090MA

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Manufacturer substitution
This part replaces 55452. Substitute parts can look different from the original.
$85.99 | 
7% OFF Phone Price : $91.99
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Nut 15X98
Nut

Part #15X98

Replaced by #703893

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Manufacturer substitution
This part replaces 15X98. Substitute parts can look different from the original.
This item is not returnable
$11.29 | 
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Most common symptoms to help you fix your riding mowers & tractors

Choose a symptom to see related riding mower and lawn tractor repairs.

View all

How do I charge a dead battery on my riding mower?

Main causes: faulty battery, bad alternator…

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Why does my riding mower deck vibrate?

Main causes: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components…

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Why is the steering loose on my riding mower?

Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…

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Why won't my riding mower cut grass?

Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…

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How do I fix a flat tire on my riding mower?

Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim…

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Why is my riding mower leaking oil or gas?

Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, …

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Why does my riding mower run rough or misfire?

Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a…

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Why does my riding mower creep in neutral?

Main causes: shift lever needs adjustment, neutral control needs adjustment…

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Why won't my riding mower move?

Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, …

Read more

Most common repair guides to help fix your riding mowers & tractors

These step-by-step repair guides will help you safely fix what’s broken on your riding mower or lawn tractor.

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How to replace the starter motor on a riding lawn mower

How to replace the starter motor on a riding lawn mower

If you hear the solenoid click but don’t hear the starter motor spin when you turn the key, follow these steps to replac…

Read more
Repair difficulty
Time required
 30 minutes or less
How to rebuild a riding lawn mower carburetor

How to rebuild a riding lawn mower carburetor

Get your sputtering carburetor running smoothly in 60 minutes.…

Read more
Repair difficulty
Time required
 60 minutes or less
How to replace a riding lawn mower rear tire

How to replace a riding lawn mower rear tire

Your mower can’t run on a damaged rear tire. Here’s how to install a new one.…

Read more
Repair difficulty
Time required
 60 minutes or less

Effective articles & videos to help repair your riding mowers & tractors

Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.

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Riding lawn mower engine clicks but doesn't turn over video

Riding lawn mower engine clicks but doesn't turn over video

Check the starter solenoid, starter motor, wiring, battery and engine.…

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How to clean the air filter in your lawn tractor

How to clean the air filter in your lawn tractor

Cleaning the air filter in a lawn tractor takes just minutes and improves engine performance.…

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Riding mower and tractor common questions

Riding mower and tractor common questions

You might find the answers to your questions about your riding mower or lawn tractor in this list of frequently asked qu…

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