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Craftsman
Riding Mowers & Tractors

Model # 52821800 Official Craftsman 36" riding rotary mower

Here are the diagrams and repair parts for Official Craftsman 52821800 36" riding rotary mower, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

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Showing 10 of 376 parts  |
Retaining Ring 36625
#31

Ground drive diagram

Retaining ring

Part #36625

Replaced by #812000029

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Manufacturer substitution
This part replaces 36625. 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
Ht Adj Lh 780061
#5

42086 (peerless model 639) transaxle diagram

Ht adj lh

Part #780061

Replaced by #1740718AYP

?
Manufacturer substitution
This part replaces 780061. Substitute parts can look different from the original.
BEST SELLER
$11.49 | 
15% OFF Phone Price : $13.49
In Stock
Dowel Pin 786026
#67

42086 (peerless model 639) transaxle diagram

Dowel pin

Part #786026

Replaced by #786026B

?
Manufacturer substitution
This part replaces 786026. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$4.60 | 
18% OFF Phone Price : $5.60
In Stock
Holder 790005
#81

42086 (peerless model 639) transaxle diagram

Holder

Part #790005

Replaced by #790025

?
Manufacturer substitution
This part replaces 790005. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$18.30 | 
10% OFF Phone Price : $20.30
In Stock
Screw 792085
#85A

42086 (peerless model 639) transaxle diagram

Screw

Part #792085

Replaced by #792085A

?
Manufacturer substitution
This part replaces 792085. Substitute parts can look different from the original.
This item is not returnable
$4.60 | 
18% OFF Phone Price : $5.60
In Stock
Spacer 786066
#89

42086 (peerless model 639) transaxle diagram

Spacer

Part #786066

Replaced by #786066

?
Manufacturer substitution
This part replaces 786066. Substitute parts can look different from the original.
This item is not returnable
$4.60
In Stock
Fuel Clamp 41008
#13

Main frame diagram

Fuel clamp

Part #41008

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

Lock Nut 9413447
Lock nut

Part #9413447

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

Lock Nut 792075
#84

42086 (peerless model 639) transaxle diagram

Lock nut

Part #792075

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

Quad Ring 792001
#38

42086 (peerless model 639) transaxle diagram

Quad ring

Part #792001

Replaced by #792001

?
Manufacturer substitution
This part replaces 792001. Substitute parts can look different from the original.
This item is not returnable
$4.37
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.

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

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Main causes: faulty battery, bad alternator…

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

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

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Why won't my riding mower start?

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

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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…

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Why does my riding mower creep in neutral?

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

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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…

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Why won't my riding mower move?

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

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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…

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

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

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

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

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Time required
 15 minutes or less

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

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

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