Tuff Torq
Engine & Drivetrain

Model # 917K66Y Official Tuff Torq transaxle - k66y

Here are the diagrams and repair parts for Official Tuff Torq 917K66Y transaxle - k66y, 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 38 parts  |

Fan.187q0083 414218
#153

Transaxle diagram

Fan.187q0083

Part #414218

Replaced by #583347501

?
Manufacturer substitution
This part replaces 414218. Substitute parts can look different from the original.
$39.98
13% OFF Phone Price : $45.98
In Stock
Seal.tc.1535 414185
#14

Transaxle diagram

Seal.tc.1535

Part #414185

Replaced by #583345001

?
Manufacturer substitution
This part replaces 414185. Substitute parts can look different from the original.
This item is not returnable
In Stock
Tank Bracket 414210
#140

Transaxle diagram

Tank bracket

Part #414210

Replaced by #583346901

?
Manufacturer substitution
This part replaces 414210. Substitute parts can look different from the original.
In Stock
Seal (s25.4* 414202
#81

Transaxle diagram

Seal (s25.4*

Part #414202

Replaced by #583346301

?
Manufacturer substitution
This part replaces 414202. Substitute parts can look different from the original.
In Stock
Bypass Lever 414191
#45

Transaxle diagram

Bypass lever

Part #414191

Replaced by #583348501

?
Manufacturer substitution
This part replaces 414191. Substitute parts can look different from the original.
This item is not returnable
$30.64
16% OFF Phone Price : $36.64
In Stock
Tapping Screw 414211
#141

Transaxle diagram

Tapping screw

Part #414211

Replaced by #583347001

?
Manufacturer substitution
This part replaces 414211. Substitute parts can look different from the original.
In Stock
Roll.pin.8*1 414207
#117

Transaxle diagram

Roll.pin.8*1

Part #414207

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

Lawn Tractor Screw 414188
#17

Transaxle diagram

Lawn tractor screw

Part #414188

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

Lawn Tractor Bolt 414187
#16

Transaxle diagram

Lawn tractor bolt

Part #414187

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

Return Brake 414204
#86

Transaxle diagram

Return brake

Part #414204

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

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor…

Main causes: damaged walking belt, improper belt tension, bad roller bearing…

Main causes: rear roller out of alignment, damaged walking belt, bad roller…

Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor…

Main causes: faulty sensors, wiring failure, bad control console…

Main causes: bad control console, wiring failure, bad motor control board…

Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor co…

Repair guides for treadmills

These step-by-step repair guides will help you safely fix what’s broken on your treadmill.

How to replace a treadmill motor controller

How to replace a treadmill motor controller

Your treadmill motor won't run with a defective motor controller. Replace the motor controller if it doesn't operate the…

Repair difficulty
Time required
 15 minutes or less
How to replace a treadmill drive motor

How to replace a treadmill drive motor

A defective drive motor won't run when activated by the motor controller. Replace the treadmill drive motor if it doesn'…

Repair difficulty
Time required
 15 minutes or less
How to replace a treadmill walking board

How to replace a treadmill walking board

A worn-out walking board creates friction with the walking belt and causes the belt to slow down during use. Replace the…

Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your fitness & exercise

Use the advice and tips in these articles and videos to get the most out of your treadmill.

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.…