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How to change the diaphragm? - Pool & Spa

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What diaphragm are talking about?
Pool/Spa pumps don't have a diaphragm.

Posted on Apr 04, 2015

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Posted on Jan 02, 2017

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Weed eater still wont run


hard diaphragm or failed pump diaphragm and dirt in the carby
have it overhauled or get a new carby

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Changed diaphragm, mower only running for short periods


did you put the diaphragm back on the right side of the gasket so that it covers the holes in the plate
( the diaphragm has to sit flush on the holes with the gasket on top)

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Chainsaw only starts without the air filter, and is a new air filter


did the saw have this problem before changing this stuff or did it occur after you chained all these components?
Sounds like the gasket and fuel diaphragm are reversed. Gasket against the carb, Diaphragm then cover

Dec 23, 2014 | Garden

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How to change float switch on hoshizaki ice machine ?


take the front and top cover off from the top look down and you can see the reservoir there is a black piece on top with two wires going in to it. turn it to remove it. You can test it by starting the ice machine and turning the float up side down. If water continues to flow you may have a bad diaphragm in your water valve. You can replace the diaphragm with a Phillips screw drive. Just be very careful when you lift the stem that goes in the solenoid make sure you pull the diaphragm with it as well. there is a spring it the stem that will fly out and it runs fast and hides well. look at the diaphragm's hole if it looks worn replace it before the float switch.

Jun 13, 2014 | Hoshizaki Freezer Commercial Ice Machines...

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What is a Peavey 44XT Diaphragm Kit for


If you've never replaced a tweeter diaphragm, then maybe you should seek out someone local who has. These guys are a bit fragile and misalignment can turn it into garbage. On the other side of this discussion...overpowering speakers blows tweeters 1st because their voice coil windings are so small, and are more easily damaged. Re-examine your PA setup and adjustments or you'll find yourself back on the phone ordering more diaphragms.

May 28, 2014 | Peavey Audio Players & Recorders

1 Answer

The rear passenger side speaker seems to vibrate and the sound quality is bad


One of the most common problem with car door speakers are damage due to water entry. Remove the door pads and inspect the speaker for diaphragm damage. Especially if its a paper cone diaphragm it absorbs moisture and looses its rigidity, which will lead to muffled sound due to lack of high frequency response. If you are replacing them change to a new generation polypropylene diaphragm type, they last longer because they are immune to water splashes and heat.

Jul 06, 2011 | Car Audio & Video

1 Answer

My 2001 heritage softail is starting to spit a little is , there a fuel fitler on this bike , and if so how do you find and change it


There is a strainer on the petcock inside the tank. It's more like screen and only keeps trash the size of boulders out of the carb, anything smaller passes right through.

With your bike being an '01 model, I would suspect the accelerator pump diaphragm. Over the years, the rubber coating comes off and the accelerator pump doesn't work quite as good as it used to. On the left side of the carb, there is a rod that moves down everytime you twist the throttle grip. If there is gasoline or the tell tale signs of fuel leakage around the hole that this rod goes into, this indicates a leaking diaphragm. To see this, you must remove the air cleaner cover, the filter element, and the backing plate for the air cleaner. Turn off the fuel at the petcock.

To change the diaphragm, I would suggest removing the entire float bowl. Remove the four screws that holds it on, lower it, take it off the bike. Empty the bowl and turn it upside down. There will be two screws left in the bottom of the bowl. These hold the accelerator pump cover on. Remove the screws and there will be a spring and a diaphragm beneath the cover. The diaphragm has a ridge around the outer edge. This ridge goes into a groove in the float bowl. Put the new diaphragm in position, put the sping on top of it and reinstall the cover. Turn the bowl over and make sure there is no trash in the bowl and reinstall it on the carb making sure you get the accelerator pump push rod back into the hole it goes into.

There is one other thing that may be giving you a problem. On your bike, I think it came from the factory with a vacuum operated petcock. These are notorious for giving problems. The diaphragms in them develop leaks and don't open the fuel petcock as they should. I think you can buy a replacement diaphragm for it as well from the Harley dealer. Remove the petcock from the tank, make sure you drain the tank first. Clean the screen I told you about and on the backside of the petcock, there are four screws. Remove the screws, the cover comes off and under it is a diaphragm and a spring. Replace the diaphragm, the spring and the screws. Reinstall the petcock.

I hope this helps, Good Luck.

Apr 14, 2010 | 2000 Harley Davidson FLSTC Heritage...

1 Answer

I DID A HEAD GASKET CHANGE AND I REMOVED THE TOP


Section 03-04A: Fuel Charging and Controls—2.0L 1995 Contour/Mystique Workshop Manual DESCRIPTION AND OPERATION Fuel Pressure Regulator The fuel pressure regulator (9C968):
  • Is mounted to the fuel injection supply manifold (9F792) downstream of the fuel injectors (9F593) .
  • Regulates the fuel pressure supplied to the fuel injectors .
  • Is a diaphragm-operated relief valve in which one side of the diaphragm senses fuel pressure and the other side is subjected to intake manifold vacuum. Nominal fuel pressure is established by a spring preload applied to the diaphragm.
  • Balances one side of the diaphragm with manifold pressure to maintain a constant fuel pressure drop across the fuel injectors .
  • Bypasses and returns excess fuel to the fuel tank (9002) .


Fuel Pressure Regulator


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Item Part Number Description 1 — Engine Vacuum Reference Tube (Part of 9C968) 2 — Ball Seat (Part of 9C968) 3 — Spring (Part of 9C968) 4 — Upper Housing (Part of 9C968) 5 — Diaphragm (Part of 9C968) 6 — Lower Housing (Part of 9C968) 7 — Fuel Outlet (Return) Tube (Part of 9C968) 8 — Fuel Inlet (Supply) Tube (Part of 9C968) 9 — O-Ring Grooves (Part of 9C968) 10 — Mounting Plate (Part of 9C968) 11 — Fuel Filter Screen (Part of 9C968) 12 — Spring Seat (Part of 9C968) 13 — Valve Assembly (Part of 9C968) 2010&c18=modelyear&c35=wsm%2cfuel%20pressure%20regulator%2cssp%2c03-04a%2cdescription%20and%20operation&s=1600x900&c=32&j=1.3&v=y&k=y&bw=1171&bh=582&ct=lan&hp=n&[aqe]

Apr 06, 2010 | 1995 Ford Explorer

1 Answer

Only runs on choke


fit a diaphragm kit in the carby
the pump diaphragm is the first to fail and then the float diaphragm distorts and will not let in enough fuel to keep it running

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How to change the hf unit?


a new diaphragm can be fitted into the original driver and the speaker will be like brand new. first you must determine if you have the older RCF version (M44TI) or the newer Mackie versions (0008093). There is only one RCF diaphragm that will work for this repair and they are scarce. There are both authentic and aftermarket Mackie diaphragm options and both work very well.
cathy@speakerex.com

Jun 15, 2009 | Mackie SRM-450 System

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