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Generac
Gas Pressure Washer

Model # 0457-0 Official Generac 5-hp 1800-psi pressure washer

Here are the diagrams and repair parts for Official Generac 0457-0 5-hp 1800-psi pressure washer, as well as links to manuals and error code tables, if available.

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  • 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”.

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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 146 parts  |
O-ring Kit 100516GS

#NI

All parts diagram

O-ring kit

Part #100516GS

Replaced by #705001

?
Manufacturer substitution
This part replaces 100516GS. Substitute parts can look different from the original.
BEST SELLER
$26.04 | 
19% OFF Phone Price : $32.04
In Stock
O-ring 115-87628P
#27

Pump assembly diagram

O-ring

Part #115-87628P

Replaced by #192914GS

?
Manufacturer substitution
This part replaces 115-87628P. Substitute parts can look different from the original.
This item is not returnable
$26.70 | 
18% OFF Phone Price : $32.70
In Stock
Shock Mount 87841
#29

Main assembly diagram

Shock mount

Part #87841

Replaced by #87841GS

?
Manufacturer substitution
This part replaces 87841. Substitute parts can look different from the original.
This item is not returnable
$7.14
In Stock
Adapter Guard 100517GS

#(NI)

All parts diagram

Adapter guard

Part #100517GS

Replaced by #6190

?
Manufacturer substitution
This part replaces 100517GS. Substitute parts can look different from the original.
$24.09 | 
20% OFF Phone Price : $30.09
In Stock
Dipstick 112-87628P
#23

Pump assembly diagram

Dipstick

Part #112-87628P

Replaced by #11287628PGS

?
Manufacturer substitution
This part replaces 112-87628P. Substitute parts can look different from the original.
$40.56
In Stock
Adaptor-quic 100518GS

#NI

All parts diagram

Adaptor-quic

Part #100518GS

Replaced by #312981GS

?
Manufacturer substitution
This part replaces 100518GS. Substitute parts can look different from the original.
$43.27 | 
12% OFF Phone Price : $49.27
In Stock
Connector 75187
#10

Accessories and attachments diagram

Connector

Part #75187

Replaced by #6190

?
Manufacturer substitution
This part replaces 75187. Substitute parts can look different from the original.
$24.09 | 
20% OFF Phone Price : $30.09
In Stock
Tube Filter 89800
#38

Main assembly diagram

Tube filter

Part #89800

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

Valve 102-87822P
#9

Pump assembly diagram

Valve

Part #102-87822P

Replaced by #10287822PGS

?
Manufacturer substitution
This part replaces 102-87822P. Substitute parts can look different from the original.
$30.04
In Stock
Screw 110-87822P
#24

Pump assembly diagram

Screw

Part #110-87822P

Replaced by #11087822PGS

?
Manufacturer substitution
This part replaces 110-87822P. Substitute parts can look different from the original.
$12.09 | 
14% OFF Phone Price : $14.09
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…

Read more
Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your 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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Top questions about Sears and Sears PartsDirect

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