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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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Showing 10 of 119 parts  |
Screw 1186308
#40

Chipper chute assembly diagram

Screw

Part #1186308

Replaced by #710-0599

?
Manufacturer substitution
This part replaces 1186308. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$4.91 | 
17% OFF Phone Price : $5.91
In Stock
Blade 1756904
#15

Cylinder assembly diagram

Blade

Part #1756904

Replaced by #1915700ZMA

?
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
Screw 1186310
#39

Chipper chute assembly diagram

Screw

Part #1186310

Replaced by #1186310

?
Manufacturer substitution
This part replaces 1186310. Substitute parts can look different from the original.
This item is not returnable
$6.14
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
$8.40
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.
$38.47
In Stock
Screw 1100805
#60

Chipper chute assembly diagram

Screw

Part #1100805

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

Nut 1186391
Nut

Part #1186391

Replaced by #712-04054

?
Manufacturer substitution
This part replaces 1186391. Substitute parts can look different from the original.
$7.83
In Stock
Pulley 1710567
#30

Chipper chute assembly diagram

Pulley

Part #1710567

Replaced by #756-04241

?
Manufacturer substitution
This part replaces 1710567. Substitute parts can look different from the original.
$47.44
In Stock
Nut 1186389
#41

Chipper chute assembly diagram

Nut

Part #1186389

Replaced by #1186389

?
Manufacturer substitution
This part replaces 1186389. Substitute parts can look different from the original.
This item is not returnable
$4.86
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
$7.11
In Stock

Symptoms for gas pressure washers

Choose a symptom to see related pressure washer repairs.

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Why does my pressure washer spray too hard?

Main causes: faulty unloader valve, bad pressure regulator…

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Why won't my pressure washer engine start?

Main causes: stale fuel, gummed up carburetor, engine needs tune up, throttle and choke controls need adjustment, bad re…

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Why does my pressure washer's engine lose power?

Main causes: dirty air filter, stale fuel, clogged or dirty carburetor, bad unloader valve…

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Why won't the pressure washer starter rope retract?

Main causes: broken recoil spring, damaged recoil starter…

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Why is smoke coming from the pressure washer's exhaust?

Main causes: overfilling engine with oil, improper fuel/air mixture, choke system problems, dirty carburetor, engine nee…

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Why does water spray out of my pressure washer's pressure relief valve?

Main causes: pump running for more than 5 minutes when the spray wand isn't being used, faulty pressure relief valve, ba…

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Why is the spray from my pressure washer weak?

Main causes: insufficient water supply, clogged water inlet screen, clogged pressure hose, faulty pump check valves, stu…

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Why won't my pressure washer mix in the detergent?

Main causes: using a high-pressure spray tip when applying detergent, clogged siphon tube, chemical injection system fai…

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Why doesn't my pressure washer recoil starter work?

Main causes: damaged recoil starter, oil inside cylinder, locked up engine piston…

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Repair guides for gas pressure washers

These step-by-step repair guides will help you safely fix what’s broken on your pressure washer.

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How to install a pressure washer chemical injection kit

How to install a pressure washer chemical injection kit

The chemical injection valve draws detergent into the pump. If it’s not drawing detergent, use a repair kit to replace t…

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Repair difficulty
Time required
 15 minutes or less
How to install a pressure washer O-ring kit

How to install a pressure washer O-ring kit

O-rings seal fittings on the pressure washer pump. Damaged seals allow water to leak from the pump. Follow these steps t…

Read more
Repair difficulty
Time required
 45 minutes or less
How to replace a pressure washer pump

How to replace a pressure washer pump

The pump can be damaged by air in the inlet water supply or by chemicals that remain in the pump body after using the ch…

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Repair difficulty
Time required
 15 minutes or less

Articles and videos for gas pressure washers

Use the advice and tips in these articles and videos to get the most out of your pressure washer.

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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.…

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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…

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7 steps for winterizing and storing a pressure washer

7 steps for winterizing and storing a pressure washer

Follow this advice to winterize your pressure washer.…

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