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Model # 3420P Official Simer lawn sprinkler pump
Here are the diagrams and repair parts for Official Simer 3420P lawn sprinkler pump, as well as links to manuals and error code tables, if available.
By Schematic
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Browse Parts for
3420P Lawn Sprinkler Pump
#NI01
All parts diagram
Pump seal kit
Part #FPP5000
The manufacturer no longer makes this part, and there's no substitute part
#NI04
All parts diagram
Pump overhaul kit, 2-hp
Part #FPP5008
The manufacturer no longer makes this part, and there's no substitute part
#NI03
All parts diagram
Pump impeller kit
Part #FPP5002
The manufacturer no longer makes this part, and there's no substitute part
#11
Lawn sprinkler pump diagram
Clampw/nut
Part #C19-54SS
The manufacturer no longer makes this part, and there's no substitute part
#12
Lawn sprinkler pump diagram
Pump body front half (3410p) (1 hp) (3415p) (1-1/2 hp)
Part #C176-53P
The manufacturer no longer makes this part, and there's no substitute part
#12A
Lawn sprinkler pump diagram
Pump body front half (3420p) (2 hp)
Part #C176-62P
The manufacturer no longer makes this part, and there's no substitute part
#4
Lawn sprinkler pump diagram
Seal plate complete (3410p) (1 hp) (3415p) (1-1/2 hp)
Part #L176-47P1
The manufacturer no longer makes this part, and there's no substitute part
#1
Lawn sprinkler pump diagram
Motor
Part #J218-596PKG
The manufacturer no longer makes this part, and there's no substitute part
#1B
Lawn sprinkler pump diagram
Motor (3420p) (2 hp)
Part #J218-883APKG
The manufacturer no longer makes this part, and there's no substitute part
#14
Lawn sprinkler pump diagram
Base
Part #C4-42P
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.
Main causes: using a high-pressure spray tip when applying detergent, clogged siphon tube, chemical injection system fai…
Main causes: overfilling engine with oil, improper fuel/air mixture, choke system problems, dirty carburetor, engine nee…
Main causes: broken recoil spring, damaged recoil starter…
Main causes: dirty air filter, stale fuel, clogged or dirty carburetor, bad unloader valve…
Main causes: insufficient water supply, clogged water inlet screen, clogged pressure hose, faulty pump check valves, stu…
Main causes: damaged recoil starter, oil inside cylinder, locked up engine piston…
Main causes: faulty unloader valve, bad pressure regulator…
Main causes: stale fuel, gummed up carburetor, engine needs tune up, throttle and choke controls need adjustment, bad re…
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.

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.

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Spray tips vary in pressure and angle of spray. This guide matches the spray tip to the cleaning job.…

Learn how to solve simple pressure washer problems.…