Tractor Accessories
Lawn & Garden

Model # 633A78 Official Tractor Accessories subassembly

Here are the diagrams and repair parts for Official Tractor Accessories 633A78 subassembly, 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 95 parts  |

Hardened Race Thrust Bearing 6266H
#12

12 garden tractor/transaxle diagram

Hardened race thrust bearing

Part #6266H

Replaced by #532006266

?
Manufacturer substitution
This part replaces 6266H. Substitute parts can look different from the original.
BEST SELLER
$11.09
15% OFF Phone Price : $13.09
In Stock
Ring 5845R
#2

12 garden tractor/transaxle diagram

Ring

Part #5845R

Replaced by #812000029

?
Manufacturer substitution
This part replaces 5845R. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$3.50
22% OFF Phone Price : $4.50
In Stock
Oil Seal 7393R
#24

12 garden tractor/transaxle diagram

Oil seal

Part #7393R

Replaced by #532007393

?
Manufacturer substitution
This part replaces 7393R. Substitute parts can look different from the original.
This item is not returnable
$5.31
16% OFF Phone Price : $6.31
In Stock
Shift Seal 8105R
#90

12 garden tractor/transaxle diagram

Shift seal

Part #8105R

Replaced by #532110542

?
Manufacturer substitution
This part replaces 8105R. Substitute parts can look different from the original.
This item is not returnable
$7.98
11% OFF Phone Price : $8.98
In Stock
Hex Fin Bolt 3159P
#96

12 garden tractor/transaxle diagram

Hex fin bolt

Part #3159P

Replaced by #596322201

?
Manufacturer substitution
This part replaces 3159P. Substitute parts can look different from the original.
This item is not returnable
In Stock
Peerless Lawn Tractor Transaxle Hi-lo Gear 633A63
#16

12 garden tractor/transaxle diagram

Peerless lawn tractor transaxle hi-lo gear

Part #633A63

In Stock
Peerless Pinion 4208R
#61

12 garden tractor/transaxle diagram

Peerless pinion

Part #4208R

In Stock
Bearing 8740H1
#18

12 garden tractor/transaxle diagram

Bearing

Part #8740H1

Replaced by #583086901

?
Manufacturer substitution
This part replaces 8740H1. Substitute parts can look different from the original.
In Stock
Lock Washer 1003P
#95

12 garden tractor/transaxle diagram

Lock washer

Part #1003P

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

Woodruff Key 9858M1
#66

12 garden tractor/transaxle diagram

Woodruff key

Part #9858M1

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

Symptoms for electric cooktops

Main causes: broken surface element, surface element switch failure, control system problem, surface element limiter swi…

Repair guides for electric cooktops

How to replace a coil surface element on an electric cooktop

How to replace a coil surface element on an electric cooktop

Easily replace a coil surface element in 15 minutes or less by following these step-by-step instructions.…

Repair difficulty
Time required
 15 minutes or less
How to replace a radiant element on an electric cooktop

How to replace a radiant element on an electric cooktop

Follow these step-by-step instructions to replace a damaged radiant element on your electric cooktop when the element wo…

Repair difficulty
Time required
 45 minutes or less
How to replace the glass top on an electric cooktop

How to replace the glass top on an electric cooktop

Don't use a cracked or damage glass cooktop—replace it, using these instructions to guide you.…

Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your central air conditioners

Maintaining your air conditioner

Maintaining your air conditioner

Learn how to maintain your central air conditioner to keep it running smoothly all summer long.…

How to prevent the 2 most common AC failures from ruining your summer

How to prevent the 2 most common AC failures from ruining your summer

Get tips to help keep your central AC running all summer long…

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.…