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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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ALL PARTS
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
Cap 103-87628P
#42

Pump assembly diagram

Cap

Part #103-87628P

Replaced by #10387628PGS

?
Manufacturer substitution
This part replaces 103-87628P. Substitute parts can look different from the original.
$26.76
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
Oil Seal 165-93360P
#16

Pump assembly diagram

Oil seal

Part #165-93360P

Replaced by #16593360PGS

?
Manufacturer substitution
This part replaces 165-93360P. Substitute parts can look different from the original.
$29.69
In Stock
O-ring 101-87822P
#8

Pump assembly diagram

O-ring

Part #101-87822P

Replaced by #100B2327GS

?
Manufacturer substitution
This part replaces 101-87822P. Substitute parts can look different from the original.
$10.49
In Stock
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
Connector 89646
#46

Pump assembly diagram

Connector

Part #89646

Replaced by #89646GS

?
Manufacturer substitution
This part replaces 89646. Substitute parts can look different from the original.
$100.30
In Stock
Coupler 75188
#11

Accessories and attachments diagram

Coupler

Part #75188

Replaced by #312981GS

?
Manufacturer substitution
This part replaces 75188. Substitute parts can look different from the original.
$43.27 | 
12% OFF Phone Price : $49.27
In Stock

Symptoms for gas pressure washers

Choose a symptom to see related pressure washer repairs.

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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 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 won't the pressure washer starter rope retract?

Main causes: broken recoil spring, damaged recoil starter…

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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 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 doesn't my pressure washer recoil starter work?

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

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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 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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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 check valve kit

How to install a pressure washer check valve kit

Air in the inlet water supply can damage the check valves. If the pump won’t build up pressure due to damaged check valv…

Read more
Repair difficulty
Time required
 120 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 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…

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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