Hydro-Gear
Engine & Drivetrain

Model # 311-0510 Official Hydro-Gear tractor transaxle/tranmission

Here are the diagrams and repair parts for Official Hydro-Gear 311-0510 tractor transaxle/tranmission, 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 94 parts  |

Hydro-gear Lawn Tractor Brake Pad (replaces 717-0678) 917-0678
#60

Hydro gear diagram

Hydro-gear lawn tractor brake pad (replaces 717-0678)

Part #917-0678

This item is not returnable
$9.67
9% OFF Phone Price : $10.67
In Stock
Lip Seal Axle HG-51066
#34

Hydro gear diagram

Lip seal axle

Part #HG-51066

Replaced by #51066

?
Manufacturer substitution
This part replaces HG-51066. Substitute parts can look different from the original.
This item is not returnable
In Stock
Hydro-gear Lawn & Garden Equipment Cotter Pin 914-0507
#70

Hydro gear diagram

Hydro-gear lawn & garden equipment cotter pin

Part #914-0507

This item is not returnable
$6.96
13% OFF Phone Price : $7.96
In Stock
Actuating Pin 941-0343
#62

Hydro gear diagram

Actuating pin

Part #941-0343

In Stock
Hydro-gear Nut-hex Ins 912-0273
#69

Hydro gear diagram

Hydro-gear nut-hex ins

Part #912-0273

In Stock
Hydro-gear Plate Puck 917-0682
#61

Hydro gear diagram

Hydro-gear plate puck

Part #917-0682

In Stock
Hydro-gear Lawn & Garden Equipment Flat Washer 736-0371
#73

Hydro gear diagram

Hydro-gear lawn & garden equipment flat washer

Part #736-0371

This item is not returnable
In Stock
Brake Rotor HG-51072
#59

Hydro gear diagram

Brake rotor

Part #HG-51072

Replaced by #51072

?
Manufacturer substitution
This part replaces HG-51072. Substitute parts can look different from the original.
In Stock
Control Arm HG-51119
#18

Hydro gear diagram

Control arm

Part #HG-51119

Replaced by #51119

?
Manufacturer substitution
This part replaces HG-51119. Substitute parts can look different from the original.
$32.50
16% OFF Phone Price : $38.50
In Stock
Swashplate-t HG-51048
#4

Hydro gear diagram

Swashplate-t

Part #HG-51048

Replaced by #51048

?
Manufacturer substitution
This part replaces HG-51048. Substitute parts can look different from the original.
In Stock

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Repair guides for gas walk-behind mowers

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

How to rebuild a lawn mower carburetor

How to rebuild a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Rebuild the carburetor if it's clogged or leaks.…

Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower recoil starter on an OHV engine

How to replace a lawn mower recoil starter on an OHV engine

Replace the recoil starter if it doesn't move when you pull the starter rope.…

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower wheel

How to replace a lawn mower wheel

Learn how replace a damaged wheel on a walk-behind lawn mower—it's a quick, easy fix.…

Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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.…

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.…

Types of walk-behind mower blades video

Types of walk-behind mower blades video

Learn about the different kinds of mower blades and how to maintain them.…