Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
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 # 917278120 Official Companion lawn tractor

Here are the diagrams and repair parts for Official Companion 917278120 lawn 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 543 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
Lock Nut 73900600
Lock nut

Part #73900600

Replaced by #532409149

?
Manufacturer substitution
This part replaces 73900600. 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
Hex Flange Lock Nut 145212
#15

Steering assembly diagram

Hex flange lock nut

Part #145212

Replaced by #532409149

?
Manufacturer substitution
This part replaces 145212. 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 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
$28.43
| 
17% OFF Phone Price : $34.43
In Stock
Tire 106222X
#3

Wheels and tires diagram

Tire

Part #106222X

Replaced by #532122073

?
Manufacturer substitution
This part replaces 106222X. Substitute parts can look different from the original.
BEST SELLER
$61.64
| 
9% OFF Phone Price : $67.64
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
Muffler Gasket 165291
#13

Engine diagram

Muffler gasket

Part #165291

Replaced by #692236

?
Manufacturer substitution
This part replaces 165291. Substitute parts can look different from the original.
BEST SELLER
$6.56
| 
13% OFF Phone Price : $7.56
In Stock
Zinc Retainer Spring 163552
#20

Mower lift diagram

Zinc retainer spring

Part #163552

Replaced by #532003146

?
Manufacturer substitution
This part replaces 163552. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$4.02
| 
20% OFF Phone Price : $5.02
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

Why is my riding mower not cutting evenly?

Main causes: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tun...

Read more

Why won't my riding mower start?

Main causes: dead battery, stale fuel, bad starter solenoid, ignition system problem, bad ignition interlock switch, clo...

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

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 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

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

Main causes: faulty battery, bad alternator...

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

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 move?

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

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 the seat switch on a riding lawn mower

How to replace the seat switch on a riding lawn mower

Follow the steps in this guide to install a new riding mower seat switch in about 15 minutes....

Read more
Repair difficulty
Time required
15 minutes or less
How to replace a riding lawn mower spark plug

How to replace a riding lawn mower spark plug

If the engine is hard to start or if the spark plug electrode is burnt or cracked, take 15 minutes to replace it....

Read more
Repair difficulty
Time required
15 minutes or less
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

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