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Karcher
Gas Pressure Washer

Model # HD1050BX Official Karcher power washer

Here are the diagrams and repair parts for Official Karcher HD1050BX power washer, 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 168 parts  |
Moulded Part 5.030-321
#3

Trigger gun diagram

Moulded part

Part #5.030-321

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

Cover 6.431-055.0
#24

Speed control diagram

Cover

Part #6.431-055.0

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

Pressuregaug 6.421-157
#10

Spill valve diagram

Pressuregaug

Part #6.421-157

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

Screw 5.411-081.0
#11

Speed control diagram

Screw

Part #5.411-081.0

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

O-ring 6.362-079
#7

Spill valve diagram

O-ring

Part #6.362-079

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

Ball 7.401-921
Ball

Part #7.401-921

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

Handle 5.321-273
#2

Base frame diagram

Handle

Part #5.321-273

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

Buffer 6.339-075
#13

Base frame diagram

Buffer

Part #6.339-075

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

Spring 5.332-066
#2

Spill valve diagram

Spring

Part #5.332-066

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

Gasket 6.362-479
Gasket

Part #6.362-479

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

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…

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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…

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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…

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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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