Item #871114

Jabsco Replacement Diaphragm Kit - Water Only - 18912-3040

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Image of : Jabsco Replacement Diaphragm Kit - Water Only - 18912-3040 Jabsco Replacement Diaphragm Kit - Water Only - 18912-3040 Item # 871114

Description

Features:

  • Jabsco 18912-3040 Diaphragm Kit
  • Applications: Jabsco 31700-, 31750- and 31755-Series Pumps
  • Function: Washdown / Baitwell / Water Systems
  • This Pump is Not Made for Pumping Water Containing Oil

Part Numbers for Jabsco Replacement Diaphragm Kit - Water Only - 18912-3040

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Questions

How do you remove the diaphragm? There doesn’t seem to be a way to get to the screws. 

Asked by: Shawn
That diagram is not readable 
Answered by: Shawn
Date published: 2024-01-31

Whoever is answering questions here doesn’t seem to have any knowledge of how to take this apart. They are just repeating what it says in the manual. I need to know how to get to the set screw so I can take the lower unit apart. The notch isn’t big enough

Asked by: Shawn
You are probably correct...contacting the manufacturer would be best.
Answered by: RJT Outlet
Date published: 2024-02-06

I see the notch but it’s not big enough for a 1/8” Allen wrench. And how do you remove the rubber plugs. They look like they’re attached with screws from the inside. 

Asked by: Shawn
Hello, Here are the removal instructions for the 31700 pump. attached is the drawing referenced in the instructions. DISASSEMBLE Pressure Switch (5) 1. Disconnect power to pump and open a faucet or valve to relieve system pressure. 2. Remove Rubber Boot, then remove the two visible Pressure Switch Screws located on each side of the Pressure Switch (5). Upper Housing (1) 3. Slide Port Clip (8) back and unplug from Tank Plumbing. 4. Loosen but DO NOT remove the four Pump Head Screws and carefully remove Upper Housing Assembly (1). 5. Remove Check Valve (2) and inspect for debris. Check Valve Assembly (2) Follow Steps 1, 3 & 4 6. Inspect Check Valve (2) and O-Ring Lower Housing (4) Follow Step 1, 3 & 4 7. Remove Rubber Plugs on housing (4-A) to access Allen Screw. 8. Rotate Lower Housing (4), so access notch is aligned with Cam Bearing Set Screw (4-C), loosen set screw with a 1/8" Allen Wrench and slide pump head off motor shaft. Diaphragm (3-B) 9. Loosen four cam piston screws with Phillips head screw driver and pull apart cam (4-B) from Inner Pistons (3-A). (Both pistons (3-A & C) should be replaced when a new Diaphragm (3-B) is installed.) Motor (7) Follow steps 1, 3, 4, 7, & 8
Answered by: Upwind
Date published: 2024-02-02
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