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  #1  
Old 10-21-2018, 11:04 AM
daddyman's Avatar
daddyman daddyman is offline
 
Join Date: Jan 2014
Location: Fredericksburg, Virginia
Posts: 232
Default advice sought removing vacuum pump

All,
I'm interesting in removing my fully functional vacuum pump.

Why in the world would anybody do that?
Answer; I'm not really using it. It only sucks my directional heading indicator. I do not rely on it any longer.

I'll save weight. perhaps 9-10 pounds. Not insignificant.

I can install an Angle of attack indicator in the same instrument panel hole.

Other than borrowing the bent removal speciality wrench, I'll suspect I'll need the following;
1. the correct gasket for replacement
2. a cover for the hole where the pump was (part number for IO-320 E2A EXP ?)
3. a cover for the firewall where the tube passed through to the instrument bay

Have others done this?

Am I missing something?

Thanks in advance,
Daddyman
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  #2  
Old 10-21-2018, 11:36 AM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
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I made a cover plate from 1/4" aluminum stock. Just size it to match the surface area and drill the holes with the proper pattern. I made a gasket from gasket stock, available at your auto parts store.

I am sure they sell cover plates and you'll likely find it in the Lyc parts catalog. You can use the standard vacuum pump gasket.

Larry
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  #3  
Old 10-21-2018, 11:59 AM
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FasGlas FasGlas is offline
 
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Location: Prescott, AZ
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You don't need the bent wrench (if you don't have one available), just get the 3 easy ones loose and tap the edge of the 4th one with a screwdriver and small hammer. Making a plate and gasket is a pretty easy task. You can remove the studs (with a few nuts) and use short bolts with drilled heads & safety wire.

Last edited by FasGlas : 10-22-2018 at 09:44 AM.
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  #4  
Old 10-21-2018, 12:40 PM
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Lufthans Lufthans is offline
 
Join Date: Dec 2017
Location: Hilversum, The Netherlands
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Default

We've done the same thing recently when we bought ours. Left out the vacuum pump, the hoses, filter, DG, AH, T&B, and while we were at it, the VOR as well, and with it the boat anchor NAV/COM unit and mode C transponder.

Replaced it with Mode S TPX, 8.33 kHz COM (both mandatory here), an $800 EFIS unit and a few dozen pounds of lightness.

Removing the pump was indeed not a hard job to do at all.

From old to new...

Good luck with yours!
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  #5  
Old 10-21-2018, 01:21 PM
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az_gila az_gila is offline
 
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Location: 57AZ - NW Tucson area
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Lycoming's cover plate is #60430

http://www.aircraft-specialties.com/...um-pump-60430/

You will also need some spacers on the studs to make up for the loss of the thickness of the "adapter assembly" that is no longer needed.

Lycoming calls out gasket number #8313 if the cover plate is used.

http://www.aircraft-specialties.com/...m-pump-sl8313/

Cheaper than buying the gasket material from the auto parts store.
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  #6  
Old 10-21-2018, 03:07 PM
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Jesse Jesse is offline
 
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Location: X35 - Ocala, FL
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Quote:
Originally Posted by az_gila View Post
Lycoming's cover plate is #60430

http://www.aircraft-specialties.com/...um-pump-60430/

You will also need some spacers on the studs to make up for the loss of the thickness of the "adapter assembly" that is no longer needed.

Lycoming calls out gasket number #8313 if the cover plate is used.

http://www.aircraft-specialties.com/...m-pump-sl8313/

Cheaper than buying the gasket material from the auto parts store.
I would keep the adapter assembly in case you decide to put on a backup alternator down the road. You can buy a plate or make one. I would use 1/4” aluminum as was mentioned, and there’s is a decent chance the old gasket will still work. Otherwise gaskets are readily available.
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  #7  
Old 10-21-2018, 06:34 PM
fixnflyguy fixnflyguy is offline
 
Join Date: Jan 2006
Location: Winston-Salem, N.C.
Posts: 933
Default Easy as others say.

Never had a sucker on mine. Made my plate from 1/4" aluminum, home made gasket.
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  #8  
Old 10-22-2018, 07:25 AM
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daddyman daddyman is offline
 
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Location: Fredericksburg, Virginia
Posts: 232
Default Thanks to all for good direction

Quote:
Originally Posted by az_gila View Post
Lycoming's cover plate is #60430

http://www.aircraft-specialties.com/...um-pump-60430/

You will also need some spacers on the studs to make up for the loss of the thickness of the "adapter assembly" that is no longer needed.

Lycoming calls out gasket number #8313 if the cover plate is used.

http://www.aircraft-specialties.com/...m-pump-sl8313/

Cheaper than buying the gasket material from the auto parts store.
Gill,
Yes, I thought I could make one, and indeed looked up the same parts numbers you sent along.

Thanks to all for your input.

Daddyman
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  #9  
Old 10-22-2018, 07:41 AM
cajunwings cajunwings is offline
 
Join Date: Jun 2007
Location: new iberia la
Posts: 578
Default Vac Pump Removal

The official gasket makes a great template to fab your own cover plate. If the other methods fail a small hammer and chisel will turn and loosen the difficult nut.

Don Broussard
RV9 Rebuild in Progress
57 Pacer
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  #10  
Old 10-22-2018, 09:29 AM
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smokyray smokyray is offline
 
Join Date: Jan 2005
Location: TX32
Posts: 1,747
Default Hasta La Vista....

Quote:
Originally Posted by daddyman View Post
All,
I'm interesting in removing my fully functional vacuum pump.
Have others done this?
Am I missing something?
Thanks in advance,
Daddyman
David,
Two words: Good Riddance!
Short answer is I never installed one in any of my 3 RV's. Why? Same reasons as you deduced and in addition the 3HP it robs your engine during operations.
Lastly it's archaic in comparison to what could utilize the hole.
Options:
1. B&C gear driven Alternator, saves a fan belt/,extra weight. Or....
2. B&C Inverted oil pickup line attachment.
http://www.bandc.aero/alternator8ampshomebuilt.aspx

3. Additionally you can then install a lightweight aerobatic flywheel.
http://www.skydynamics.com/products/...eight-flywheel

Or as mentioned above, just install a cover plate and enjoy less weight, assorted lines, filters, heavy instruments and hassles as well as 3 free HP.
https://www.aircraftspruce.com/catal...SABEgKaavD_BwE
Plate
http://www.chiefaircraft.com/lyc-831...yABEgKgafD_BwE
Gasket

You won't miss it...
V/R
Smokey

PS: BTW, 9-10 lbs saved is very significant...

Last edited by smokyray : 10-22-2018 at 11:17 AM.
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