Model # 3902522 Official Craftsman pump

Here are the diagrams and repair parts for Official Craftsman 3902522 pump, as well as links to manuals and error code tables, if available.

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Installation guide

Owner’s manual

Model diagram and schematic

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ALL PARTS

Showing 10 of 70 parts |

Valve assy diagram

Pump body gasket

Part #J20-18

Replaced by #J20-18C

This item is not returnable

$9.99 |

9% OFF Phone Price : $10.99

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Motor assy diagram

Pump shaft seal

Part #17351-0009

This item is not returnable

$8.89 |

10% OFF Phone Price : $9.89

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#13

Motor assy diagram

Pump pressure switch tube

Part #U37-673P

This item is not returnable

$19.98 |

9% OFF Phone Price : $21.98

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Motor assy diagram

Pump shaft seal

Part #U109-6A

Replaced by #U109-6B

$106.69 |

10% OFF Phone Price : $118.69

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#22

Motor assy diagram

Switch

Part #2782

Replaced by #TC2153-P2

$59.89 |

9% OFF Phone Price : $65.89

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Single pipe jet diagram

Pump jet body leather seal, 2-in

Part #J57-1

$63.99 |

9% OFF Phone Price : $69.99

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Double pipe jet diagram

Pump check valve

Part #N212-12P

$118.69 |

9% OFF Phone Price : $130.69

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Pump Pressure Regulator (replaces L162-10p) L162-10PS

#15

Motor assy diagram

Pump pressure regulator (replaces l162-10p)

Part #L162-10PS

$63.99 |

9% OFF Phone Price : $69.99

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#14

Motor assy diagram

Pump hose fitting, 90-degree

Part #U111-212T

This item is not returnable

$27.69 |

18% OFF Phone Price : $33.69

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Motor assy diagram

Pump diffuser

Part #J1-40P

$170.60 |

7% OFF Phone Price : $182.60

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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…

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 my pressure washer's engine lose power?

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

Why won't the pressure washer starter rope retract?

Main causes: broken recoil spring, damaged recoil starter…

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 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…

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 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 doesn't my pressure washer recoil starter work?

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

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

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

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 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…

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 # 3902522 Official Craftsman pump

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for gas pressure washers

Why does my pressure washer spray too hard?

Why won't my pressure washer engine start?

Why does my pressure washer's engine lose power?

Why won't the pressure washer starter rope retract?

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

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

Why is the spray from my pressure washer weak?

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

Why doesn't my pressure washer recoil starter work?

Repair guides for gas pressure washers

How to install a pressure washer chemical injection kit

How to install a pressure washer O-ring kit

How to replace a pressure washer pump

Articles and videos for gas pressure washers

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

Tapping into a new feature in the Search Bar on Sears PartsDirect

7 steps for winterizing and storing a pressure washer

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