Model # 3902623 Official Craftsman high-pressure sprinkler pump

Here are the diagrams and repair parts for Official Craftsman 3902623 high-pressure sprinkler pump, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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ALL PARTS

Showing 10 of 37 parts |

Pump assembly diagram

Pump shaft seal

Part #17351-0009

This item is not returnable

$8.89 |

10% OFF Phone Price : $9.89

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Pump assembly diagram

Pump shaft seal

Part #U109-6A

Replaced by #U109-6B

$106.69 |

10% OFF Phone Price : $118.69

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#19

Pump assembly diagram

Cap screw

Part #U30-77SS

$8.77

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#4A

Pump assembly diagram

Pump trap back body

Part #C3-189P1

$231.69 |

5% OFF Phone Price : $243.69

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Pump assembly diagram

Pump impeller

Part #C105-92PVB

$220.87

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#11A

Pump assembly diagram

Pump trap body

Part #C176-62PA

$255.92 |

$12.00 OFF Phone Price : $267.92

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#7A

Pump assembly diagram

Pump impeller

Part #C105-92PBBB

$182.49 |

6% OFF Phone Price : $194.49

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#7C

Pump assembly diagram

Screw

Part #C30-51SS

$17.16

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#1A

Pump assembly diagram

Overload protector

Part #U18-1342

$191.53

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#1D

Pump assembly diagram

Pump start switch governor

Part #U18-128

$214.50 |

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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…

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…

Why won't the pressure washer starter rope retract?

Main causes: broken recoil spring, damaged recoil starter…

Why does my pressure washer's engine lose power?

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

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…

Why doesn't my pressure washer recoil starter work?

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

Why does my pressure washer spray too hard?

Main causes: faulty unloader valve, bad pressure regulator…

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…

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…

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

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

Repair difficulty

Time required

120 minutes or less

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…

Repair difficulty

Time required

45 minutes or less

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…

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

Model # 3902623 Official Craftsman high-pressure sprinkler pump

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for gas pressure washers

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

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

Why won't the pressure washer starter rope retract?

Why does my pressure washer's engine lose power?

Why is the spray from my pressure washer weak?

Why doesn't my pressure washer recoil starter work?

Why does my pressure washer spray too hard?

Why won't my pressure washer engine start?

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

Repair guides for gas pressure washers

How to install a pressure washer check valve kit

How to install a pressure washer O-ring kit

How to install a pressure washer chemical injection kit

Articles and videos for gas pressure washers

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Choosing the correct spray tip for a pressure washer

Solving pressure washer problems

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