Jump to content

Low vacuum


Duane Baker

Recommended Posts

Bottom of the green is OK.   Are your vacuum instruments working properly?  
From what I’ve been told, from several sources, is that you don’t need to run excessive vacuum. The higher the vacuum, the more wear on the instruments. 

Link to comment
Share on other sites

Vacuum regulator is on cockpit side the firewall, on the pilot’s side. Make sure you check everything else before messing with the regulator. Biggest problems are filters that haven’t been changed and old deteriorating hoses - sometimes they delaminate and the inside collapses but they look OK from the outside. 

I get 4.75” with a new Tempest pump at sea level. About 4.5“ at 10,000’. A little rise if I turn the backup pump on. 
 

Skip

 

  • Like 1
Link to comment
Share on other sites

Duane,

In the green by the smallest amount, is still in the green... the instruments will work perfectly well...

Continuing to operate this way would be sub-optimal...

Finding an instrument shop to chase where the vacuum is and isn’t is probably a good idea...

See how many fittings you can find, take a pic of, look for cracked lines, and things that are not right...

Start with adding a Vac gauge that has numbers on it, temporarily at least...

 

The life of the vac system... is getting closer to its natural end...

It may often be wiser to spend money on the next digital solution...

PP thoughts only, not a mechanic...

Best regards,

-a-

Link to comment
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.   Paste as plain text instead

  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.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.