Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Hydro-Gear
Engine & Drivetrain

Model # 321-0510 Official Hydro-Gear hydro-gear transaxle

Here are the diagrams and repair parts for Official Hydro-Gear 321-0510 hydro-gear transaxle, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • 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”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

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

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 96 parts  |
Tapping Bolt 178334
#88

Hydro transaxle diagram

Tapping bolt

Part #178334

Replaced by #587798701

?
Manufacturer substitution
This part replaces 178334. Substitute parts can look different from the original.
This item is not returnable
$5.31
| 
16% OFF Phone Price : $6.31
In Stock
Lawn Tractor Transaxle Sealant 178322
#6

Hydro transaxle diagram

Lawn tractor transaxle sealant

Part #178322

$76.42
In Stock
Compression 170417
#71

Hydro transaxle diagram

Compression

Part #170417

Replaced by #583001401

?
Manufacturer substitution
This part replaces 170417. Substitute parts can look different from the original.
This item is not returnable
$8.54
In Stock
Spacer #2371 170411
#65

Hydro transaxle diagram

Spacer #2371

Part #170411

Replaced by #583001201

?
Manufacturer substitution
This part replaces 170411. Substitute parts can look different from the original.
This item is not returnable
$11.97
In Stock
Miter Gear 150792
#37

Hydro transaxle diagram

Miter gear

Part #150792

Replaced by #583244201

?
Manufacturer substitution
This part replaces 150792. Substitute parts can look different from the original.
$131.96
In Stock
Miter Gear 150793
#38

Hydro transaxle diagram

Miter gear

Part #150793

Replaced by #583244201

?
Manufacturer substitution
This part replaces 150793. Substitute parts can look different from the original.
$131.96
In Stock
Expansion 173165
#128

Hydro transaxle diagram

Expansion

Part #173165

Replaced by #583057701

?
Manufacturer substitution
This part replaces 173165. Substitute parts can look different from the original.
$73.31
In Stock
Bearing.30x5 173159
#19

Hydro transaxle diagram

Bearing.30x5

Part #173159

Replaced by #532150771

?
Manufacturer substitution
This part replaces 173159. Substitute parts can look different from the original.
$39.98
In Stock
Retaining Ring 170405
#53

Hydro transaxle diagram

Retaining ring

Part #170405

Replaced by #583041601

?
Manufacturer substitution
This part replaces 170405. Substitute parts can look different from the original.
This item is not returnable
$6.83
In Stock
Friction Stud 170421
#76

Hydro transaxle diagram

Friction stud

Part #170421

Replaced by #582998501

?
Manufacturer substitution
This part replaces 170421. Substitute parts can look different from the original.
$13.69
In Stock

Effective articles & videos to help repair your furnaces

View all
How to get your furnace ready for winter

How to get your furnace ready for winter

Get expert tips for preparing your furnace for winter. Follow maintenance tips to keep your furnace in top shape....

Read more
Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs....

Read more
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....

Read more

Parts & More