Rear-Engine Riding Mower

Model # RZ3016 (966042901) Official Husqvarna tractor

Here are the diagrams and repair parts for Official Husqvarna RZ3016 (966042901) tractor, as well as links to manuals and error code tables, if available.

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RZ3016 (966042901) Riding Mowers & Tractors
Washer Screw 539107630
#14

30" deck diagram

Washer screw

Part #539107630

Replaced by #584953901

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This part replaces 539107630. Substitute parts can look different from the original.
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Nut.9/16.top 539107590
#21

30" deck diagram

Nut.9/16.top

Part #539107590

Replaced by #596134801

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This part replaces 539107590. Substitute parts can look different from the original.
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Ignition.swi 539107541
#6

Ignition diagram

Ignition.swi

Part #539107541

Replaced by #175566

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This part replaces 539107541. Substitute parts can look different from the original.
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Lawn Tractor Screw 539976952
#24

Ignition diagram

Lawn tractor screw

Part #539976952

Replaced by #596039001

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This part replaces 539976952. Substitute parts can look different from the original.
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Mandrel 539112057
#13

30" deck diagram

Mandrel

Part #539112057

Replaced by #587820301

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This part replaces 539112057. Substitute parts can look different from the original.
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Push Nut 539107626
#23

30" deck diagram

Push nut

Part #539107626

Replaced by #532110452

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Manufacturer substitution
This part replaces 539107626. Substitute parts can look different from the original.
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Husqvarna Lawn Tractor Idler Arm Return Spring (replaces 401872) 532401872
#11

30" deck diagram

Husqvarna lawn tractor idler arm return spring (replaces 401872)

Part #532401872

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Pulley 532175820
#7

30" deck diagram

Pulley

Part #532175820

Replaced by #596481401

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This part replaces 532175820. Substitute parts can look different from the original.
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Bolt.washer.asm.7/16-2 532193003
#5

30" deck diagram

Bolt.washer.asm.7/16-2

Part #532193003

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Lawn Tractor Nut 539976978
#26

Ignition diagram

Lawn tractor nut

Part #539976978

Replaced by #582478602

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This part replaces 539976978. Substitute parts can look different from the original.
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Most common symptoms to help you fix your riding mowers & tractors

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

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

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

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

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

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

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

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

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

Main causes: faulty battery, bad alternator…

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.

How to replace the starter motor on a riding lawn mower

How to replace the starter motor on a riding lawn mower

If you hear the solenoid click but don’t hear the starter motor spin when you turn the key, follow these steps to replac…

Repair difficulty
Time required
 30 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.…

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.…

Repair difficulty
Time required
 30 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.

What's the difference between a lawn tractor and a garden tractor?

What's the difference between a lawn tractor and a garden tractor?

Do you know a lawn tractor from a garden tractor? Take a look at the key differences and discover how each handles your …

The best time of day to mow grass (and when you should absolutely not)

The best time of day to mow grass (and when you should absolutely not)

Wondering when to mow your lawn for the best results? Timing matters more than you might think. Discover the best time o…

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.…