WW Grinder
Chipper/Shredder

Model # 78787 Official WW Grinder chipper/shredder

Here are the diagrams and repair parts for Official WW Grinder 78787 chipper/shredder, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 119 parts  |

V-belt 1762636
#39

Main frame assembly diagram

V-belt

Part #1762636

Replaced by #1762636MA

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Manufacturer substitution
This part replaces 1762636. Substitute parts can look different from the original.

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$32.89
13% OFF Phone Price : $37.89
In Stock
Lock Washer 1100242
#49

Chipper chute assembly diagram

Lock washer

Part #1100242

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

Pulley 1710567
#30

Chipper chute assembly diagram

Pulley

Part #1710567

Replaced by #756-04241

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Manufacturer substitution
This part replaces 1710567. Substitute parts can look different from the original.
In Stock
Nut 1186391
Nut

Part #1186391

Replaced by #712-04054

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Manufacturer substitution
This part replaces 1186391. Substitute parts can look different from the original.
This item is not returnable
In Stock
Washer 1701055
Washer

Part #1701055

Replaced by #1701055

?
Manufacturer substitution
This part replaces 1701055. Substitute parts can look different from the original.
This item is not returnable
In Stock
Grip 1715685
#63

Chipper chute assembly diagram

Grip

Part #1715685

Replaced by #720-0269

?
Manufacturer substitution
This part replaces 1715685. Substitute parts can look different from the original.
This item is not returnable
In Stock
Plug 1762690
#8

Main frame assembly diagram

Plug

Part #1762690

Replaced by #1762690MA

?
Manufacturer substitution
This part replaces 1762690. Substitute parts can look different from the original.
This item is not returnable
In Stock
Blade 1756904
#15

Cylinder assembly diagram

Blade

Part #1756904

Replaced by #1915700ZMA

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Manufacturer substitution
This part replaces 1756904. Substitute parts can look different from the original.
This item is not returnable
$13.13
13% OFF Phone Price : $15.13
In Stock
Sleeve 1763112
#12

Cylinder assembly diagram

Sleeve

Part #1763112

Replaced by #1763112MA

?
Manufacturer substitution
This part replaces 1763112. Substitute parts can look different from the original.
In Stock
Valve Stem 1718086
#26

Main frame assembly diagram

Valve stem

Part #1718086

Replaced by #934-0255

?
Manufacturer substitution
This part replaces 1718086. Substitute parts can look different from the original.
This item is not returnable
$5.43
16% OFF Phone Price : $6.43
In Stock

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Repair guides for gas walk-behind mowers

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

How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

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

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Repair difficulty
Time required
 45 minutes or less

Articles and videos for gas walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

Tapping into a new feature in the Search Bar on Sears PartsDirect

Tapping into a new feature in the Search Bar on Sears PartsDirect

Learn about a new feature added to the Search Bar on Sears PartsDirect…

How to remove a lawn mower blade using a removal tool

How to remove a lawn mower blade using a removal tool

Learn how a blade removal tool makes replacing the blade easier and safer…

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

Find out how to test and fix problems with the spark plug, stop wire, ignition coil and flywheel.…