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MTD
Rear-Engine Riding Mower

Model # 134B-325-401 Official MTD riding lawn mower

Here are the diagrams and repair parts for Official MTD 134B-325-401 riding lawn mower, as well as links to manuals and error code tables, if available.

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  • 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”.

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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 275 parts  |
Lawn & Garden Equipment Hex Flange Nut (replaces 753-05549, 912-0417a) 712-0417A
#16

Three-in-one mowing deck diagram

Lawn & garden equipment hex flange nut (replaces 753-05549, 912-0417a)

Part #712-0417A

BEST SELLER
$8.24
| 
11% OFF Phone Price : $9.24
In Stock
Brake Assembly 661-0006
#5

Single speed transmission-l.h. diagram

Brake assembly

Part #661-0006

Replaced by #961-0006

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Manufacturer substitution
This part replaces 661-0006. Substitute parts can look different from the original.
$47.13
| 
11% OFF Phone Price : $53.13
In Stock
Aircap Lawn Tractor Screw (replaces 150011, 910-0134) 710-0134
Aircap lawn tractor screw (replaces 150011, 910-0134)

Part #710-0134

This item is not returnable
$6.55
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13% OFF Phone Price : $7.55
In Stock
Lawn & Garden Equipment Screw, 3/8-16 X 1-3/4-in 710-0347
#8

Three-in-one mowing deck diagram

Lawn & garden equipment screw, 3/8-16 x 1-3/4-in

Part #710-0347

This item is not returnable
$7.69
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12% OFF Phone Price : $8.69
In Stock
Yard-man Lawn Tractor Oil Drain Tube (replaces 1830086, 731-1682) 731-1682A
#24

Frame assembly diagram

Yard-man lawn tractor oil drain tube (replaces 1830086, 731-1682)

Part #731-1682A

This item is not returnable
$10.74
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16% OFF Phone Price : $12.74
In Stock
Toro Lawn Tractor Screw 710-0643
#7

Front floor console diagram

Toro lawn tractor screw

Part #710-0643

This item is not returnable
$10.56
| 
16% OFF Phone Price : $12.56
In Stock
Puck Brake 717-0678
#8

Single speed transmission-l.h. diagram

Puck brake

Part #717-0678

Replaced by #917-0678

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Manufacturer substitution
This part replaces 717-0678. Substitute parts can look different from the original.
This item is not returnable
$9.67
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9% OFF Phone Price : $10.67
In Stock
Sears Lawn & Garden Equipment Flat Washer 736-0188
#31

Frame assembly diagram

Sears lawn & garden equipment flat washer

Part #736-0188

This item is not returnable
$6.58
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13% OFF Phone Price : $7.58
In Stock
Ace Lawn Tractor Hex Bolt 710-3096
#6

Variable drive diagram

Ace lawn tractor hex bolt

Part #710-3096

This item is not returnable
$9.93
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9% OFF Phone Price : $10.93
In Stock
Yard Machines Lawn & Garden Equipment Screw 710-1017
Yard machines lawn & garden equipment screw

Part #710-1017

This item is not returnable
$12.71
| 
14% OFF Phone Price : $14.71
In Stock

Most common symptoms to help you fix your riding mowers & tractors

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

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

Main causes: faulty battery, bad alternator...

Read more

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, ...

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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...

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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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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....

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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....

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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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