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

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Companion
Front-Engine Lawn Tractor

Model # 917278240 Official Companion tractor

Here are the diagrams and repair parts for Official Companion 917278240 tractor, 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.

Owner’s manual
  View engine

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 576 parts  |
Lawn Tractor Axle Cap 104757X428
#11

Wheels and tires diagram

Lawn tractor axle cap

Part #104757X428

Replaced by #532104757

?
Manufacturer substitution
This part replaces 104757X428. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Wizard Lawn Tractor Axle Flange Bearing (replaces 532009040, 5320090-40, 532124959, 577203109, 5920h, 5920h1, P-1246, P-1622) 9040H
#7

Wheels and tires diagram

Wizard lawn tractor axle flange bearing (replaces 532009040, 5320090-40, 532124959, 577203109, 5920h, 5920h1, p-1246, p-1622)

Part #9040H

BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Lawn Tractor Bolt 173984
#30

Mower diagram

Lawn tractor bolt

Part #173984

Replaced by #584953901

?
Manufacturer substitution
This part replaces 173984. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Lawn Tractor Gauge Wheel 174873
#117

Mower diagram

Lawn tractor gauge wheel

Part #174873

Replaced by #589527301

?
Manufacturer substitution
This part replaces 174873. Substitute parts can look different from the original.
BEST SELLER
$11.98 | 
14% OFF Phone Price : $13.98
In Stock
Lawn Mower Shoulder Bolt 184219
#116

Mower diagram

Lawn mower shoulder bolt

Part #184219

Replaced by #596434404

?
Manufacturer substitution
This part replaces 184219. Substitute parts can look different from the original.
BEST SELLER
$6.64 | 
13% OFF Phone Price : $7.64
In Stock
Tower Lawn Tractor Ignition Switch (replaces 163968, 189687, 5321755-66, 5321896-87, 539107541) 175566
#30

Electrical diagram

Tower lawn tractor ignition switch (replaces 163968, 189687, 5321755-66, 5321896-87, 539107541)

Part #175566

BEST SELLER
$28.29 | 
17% OFF Phone Price : $34.29
In Stock
Flanged Toplock Nut 178342
#33

Mower diagram

Flanged toplock nut

Part #178342

Replaced by #596134801

?
Manufacturer substitution
This part replaces 178342. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
16% OFF Phone Price : $6.31
In Stock
Vented Mandrel Shaft Assembly 137645
#13

Mower diagram

Vented mandrel shaft assembly

Part #137645

Replaced by #532137646

?
Manufacturer substitution
This part replaces 137645. Substitute parts can look different from the original.
BEST SELLER
$27.68 | 
18% OFF Phone Price : $33.68
In Stock
Lawn Tractor Blade Idler Pulley 127783
#47

Drive diagram

Lawn tractor blade idler pulley

Part #127783

Replaced by #532139245

?
Manufacturer substitution
This part replaces 127783. Substitute parts can look different from the original.
BEST SELLER
$30.45 | 
16% OFF Phone Price : $36.45
In Stock
Lawn Tractor Grass Catcher Left Gauge Wheel Bracket 2029J
#187

Chassis and enclosures diagram

Lawn tractor grass catcher left gauge wheel bracket

Part #2029J

Replaced by #596987401

?
Manufacturer substitution
This part replaces 2029J. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$3.98 | 
20% OFF Phone Price : $4.98
In Stock

Most common symptoms to help you fix your riding mowers & tractors

Choose a symptom to see related riding mower and lawn tractor repairs.

View all

How do I fix a flat tire on my riding mower?

Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim…

Read more

Why does my riding mower run rough or misfire?

Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a…

Read more

Why won't my riding mower move?

Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, …

Read more

Why is the steering loose on my riding mower?

Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…

Read more

Why is my riding mower leaking oil or gas?

Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, …

Read more

Why does my riding mower creep in neutral?

Main causes: shift lever needs adjustment, neutral control needs adjustment…

Read more

Why won't my riding mower cut grass?

Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…

Read more

Why does my riding mower deck vibrate?

Main causes: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components…

Read more

How do I charge a dead battery on my riding mower?

Main causes: faulty battery, bad alternator…

Read more

Most common repair guides to help fix your riding mowers & tractors

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

View all
How to replace a riding lawn mower rear tire

How to replace a riding lawn mower rear tire

Your mower can’t run on a damaged rear tire. Here’s how to install a new one.…

Read more
Repair difficulty
Time required
 60 minutes or less
How to replace a riding lawn mower blade

How to replace a riding lawn mower blade

If a blade on your mower is dull or bent, replace it following the steps in this repair guide.…

Read more
Repair difficulty
Time required
 30 minutes or less
How to replace a riding lawn mower fuel filter

How to replace a riding lawn mower fuel filter

Help your mower run better by replacing the fuel filter during your riding mower's annual tune-up.…

Read more
Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your riding mowers & tractors

Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.

View all
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.…

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
Riding lawn mower engine clicks but doesn't turn over video

Riding lawn mower engine clicks but doesn't turn over video

Check the starter solenoid, starter motor, wiring, battery and engine.…

Read more

Parts & More