Jump to content
Sign in to follow this  
bunch

PI Metering Unit / Control unit Fuel Control Diaphragm

Recommended Posts

Hi

I have taken apart the metering unit and control unit, since fuel was leaking from the control unit. The fuel seal/control diaphragm is perished. I have order a replacement from Rimmers, part No. 519870 but it does not come with the metal insert at the centre. This pre fitted diaphragm is no longer available. Does anyone know how I swap the centre insert from the old diaphragm to the new one? Do I still need it? I have checked with all the usual suppliers - they state they sell lots of diaphragms without the centre insert but no one knows how to actually fit it! Any help much appreciated.

Thanks

Share this post


Link to post
Share on other sites

Hi

Not sure myself as I have never had the need to strip m/u down I`m sure if you contact steve at KMI (01462 682432) he should be able to help I have always found kmi very helpful

Bluebob

Share this post


Link to post
Share on other sites

I fitted a Rimmer's fuelling diaphragm last year and it lasted about an hour on Australian high octane unleaded before it swelled so much that fuel leaked past it along the shaft.

 

I replaced it with a locally made Viton diaphragm and have no problems since.

Share this post


Link to post
Share on other sites

Yes fuel over last 2 years is getting far more aggressive, I had to change all my piping as it was perishing.

Also rebuild a metering unit

Make sure you get proper seal kit built for latest fuels....

Share this post


Link to post
Share on other sites

Thanks for all your help. Spoke with a very helpful Steve at KMI (thanks Blue bob). FYI> The insert pushes out in the direction of the control unit and fits back in the same way. The shoulder of the insert faces the control unit and the flat face is facing the metering unit. Simple to remove and fit once one knows how! The diaphragm has 3 small marks on the rubber face - and these face the metering unit to ensure the diaphragm is the correct way round. New one fitted and no more leaking fuel!

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

×
×
  • Create New...

Important Information

Please familiarise yourself with our Terms and Conditions. By using this site, you agree to the following: Terms of Use.