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Hydro-Gear
Engine & Drivetrain

Model # 311-3500 Official Hydro-Gear transaxle

Here are the diagrams and repair parts for Official Hydro-Gear 311-3500 transaxle, 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.

Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 113 parts  |
Brake Actuator 170409
#125

Hydro-gear transaxle diagram

Brake actuator

Part #170409

Replaced by #532142887

?
Manufacturer substitution
This part replaces 170409. Substitute parts can look different from the original.
This item is not returnable
$2.89 | 
26% OFF Phone Price : $3.89
In Stock
Brake Spring 178335
#141

Hydro-gear transaxle diagram

Brake spring

Part #178335

Replaced by #583042001

?
Manufacturer substitution
This part replaces 178335. Substitute parts can look different from the original.
This item is not returnable
$12.59 | 
14% OFF Phone Price : $14.59
In Stock
Fan Kit 178337
#155

Hydro-gear transaxle diagram

Fan kit

Part #178337

Replaced by #583044001

?
Manufacturer substitution
This part replaces 178337. Substitute parts can look different from the original.
$70.99 | 
8% OFF Phone Price : $76.99
In Stock
Compression 170417
#151

Hydro-gear 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
Lawn Tractor Transaxle Sealant 178322
#79

Hydro-gear transaxle diagram

Lawn tractor transaxle sealant

Part #178322

$76.42
In Stock
Brake Rod 178336
#152

Hydro-gear transaxle diagram

Brake rod

Part #178336

$40.93
In Stock
Relief Spring 169546
#145

Hydro-gear transaxle diagram

Relief spring

Part #169546

This item is not returnable
$5.25
In Stock
Spacer #2371 170411
#130

Hydro-gear 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
Bearing 142934
#8

Hydro-gear transaxle diagram

Bearing

Part #142934

Replaced by #532122745

?
Manufacturer substitution
This part replaces 142934. Substitute parts can look different from the original.
$101.96
In Stock
Bearing.30x5 173159
#11

Hydro-gear 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

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