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Cover for the vacuum pump mount necessary?

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europapa

Joined: 30 Aug 2010
Posts: 63

Posted: Fri Feb 03, 2012 1:37 am Post subject: Cover for the vacuum pump mount necessary?

I have removed my vacuum system and now I wonder whether a cover plate for the hole in the gearbox is needed or not.

Reg



Juergen

ptag.dev(at)tiscali.co.uk
Guest

Posted: Fri Feb 03, 2012 3:07 am Post subject: Cover for the vacuum pump mount necessary?

Juergen, yes most definitely or you will get ingress of dust in to the gear

box. I only yesterday purchased a new vac pump! Shame I didn't know you had

one for sale ?

Regards

Bob H G-PTAG



--

dpark748(at)hotmail.co.uk
Guest

Posted: Fri Feb 03, 2012 3:46 am Post subject: Cover for the vacuum pump mount necessary?

Put one on g-ldvo, no problem so far!  Dave



Sent from my iPhone

On 3 Feb 2012, at 09:54, "europapa" <jubu(at)onlinehome.de> wrote:



 	  Quote: 	
		   

 

 I have removed my vacuum system and now I wonder whether a cover plate for the hole in the gearbox is needed or not.

 Reg

 

 Juergen

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=365516#365516

europapa

Joined: 30 Aug 2010
Posts: 63

Posted: Fri Feb 03, 2012 4:12 am Post subject: Re: Cover for the vacuum pump mount necessary?

Thank you.



If dust is the problem it doesn't need to be a very solid one.



Bob, if I  had only known........... .



Reg Juergen

rlborger(at)mac.com
Guest

Posted: Fri Feb 03, 2012 7:15 am Post subject: Cover for the vacuum pump mount necessary?

Juergen,



Yes, you do need a cover plate.  Now you need to determine which cover plate.  There were at least two different cover plates of different sizes.  



I had an alternator on that pad and recently removed it.  There was a cover on that pad but in the building years, I have misplaced it.  So I called Lockwood Aviation to obtain a replacement cover.  They had just removed that cover from a new engine and send the cover and gasket to me free of charge.  (Great folks at Lockwood!)  The new cover and gasket arrived but it didn't fit. Seems they have changed the configuration of that pad sometime in the last 10 years.  Here is a picture of the new plate and gasket along with the alternator adaptor plate that came off my engine:





I turned them over and added a ruler so you can get an idea of the sizes:





As near as I can determine, the old cover plates are no longer available.  



If your engine uses the new, larger, cover plate, I'll be happy to send the new plate and gasket to you or you can contact your local Rotax dealer to see if he has one lying around that was removed from another engine.



If your engine is older, like mine, you can still check to see if an older plate is available.  If not, perhaps you can do as I did and make one up from aluminum bar stock:





That's a piece of 1/4 in aluminum bar stock cut to shape and drilled using the adaptor plate as a template.  I also made up a thin silicone gasket to go between the plate and engine.



I hope this helps.



Blue skies & tailwinds,

Bob Borger

Europa XS Tri, Rotax 914, Airmaster C/S Prop.

Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP

3705 Lynchburg Dr.

Corinth, TX  76208-5331

Cel: 817-992-1117

rlborger(at)mac.com



On Feb 3, 2012, at 3:37 AM, europapa wrote:



 	  Quote: 	
		   

 

 I have removed my vacuum system and now I wonder whether a cover plate for the hole in the gearbox is needed or not.

 Reg

 

 Juergen

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europapa

Joined: 30 Aug 2010
Posts: 63

Posted: Fri Feb 03, 2012 10:17 am Post subject: Re: Cover for the vacuum pump mount necessary?

Bob, your support is outstanding, thank you so much!

I have got the removed vacuum pump here in my house.

The bolt holes are 4,7cm ( 1,85 inch) apart (center-center).

Seems my mount has got the same size as yours.

May be, they send you the wrong cover especially I am not sure what the grove in the plate and the gasket should be good for.

But looking at the pictures you made I now have got the idea to close the adapter plate and use it as a cover.



Thanks again



Juergen

rlborger(at)mac.com
Guest

Posted: Fri Feb 03, 2012 11:18 am Post subject: Cover for the vacuum pump mount necessary?

Hi Jurgen,



When I spoke with Trisha Lockwood, I used the part number for the cover and gasket directly from the current Rotax Illustrated Parts Catalog.  926231 for the Cover and 931770 for the Gasket.  And the parts in the illustration look just like the parts sent by Lockwood.  Normally these parts are not fastened to the studs with nuts and washers.  According to the illustrated parts catalog, the cover and gasket are usually held in place with 4 Allen Screws (M8x20) 240071, 4 Lock Washers (A 945752 and 4 Flat Washers (8.4) 250311.  BTW, the cover plate provided by Lockwood was 6mm thick (~ 1/4 in), so a 6mm or 1/4" plate should be correct.



Blue skies & tailwinds,

Bob Borger

Europa XS Tri, Rotax 914, Airmaster C/S Prop.

Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP

3705 Lynchburg Dr.

Corinth, TX  76208-5331

Cel: 817-992-1117

rlborger(at)mac.com



On Feb 3, 2012, at 12:17 PM, europapa wrote:



 	  Quote: 	
		   

 

 Bob, your support is outstanding, thank you so much!

 I have got the removed vacuum pump here in my house.

 The bolt holes are 4,7cm ( 1,85 inch) apart (center-center).

 Seems my mount has got the same size as yours.

 May be, they send you the wrong cover especially I am not sure what the grove in the plate and the gasket should be good for.

 But looking at the pictures you made I now have got the idea to close the adapter plate and use it as a cover.

 

 Thanks again

 

 Juergen

europapa

Joined: 30 Aug 2010
Posts: 63

Posted: Fri Feb 03, 2012 12:38 pm Post subject: Re: Cover for the vacuum pump mount necessary?

Sorry Bob,



didn't want to blame anybody.

My engine is from 2004.

That means you have to be careful when ordering a vacuum pump.



Juergen

rlborger(at)mac.com
Guest

Posted: Fri Feb 03, 2012 1:30 pm Post subject: Cover for the vacuum pump mount necessary?

Juergen,



No problem!  I just wanted to make sure folks knew that the best parts available were discussed with Lockwood.



My engine is also from 2004.  Yes, one must be careful when ordering any accessory that connects to the back of the gearbox.  There have been changes to the accessory pad over the years.



Blue skies & tailwinds,

Bob Borger

Europa XS Tri, Rotax 914, Airmaster C/S Prop.

Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP

3705 Lynchburg Dr.

Corinth, TX  76208-5331

Cel: 817-992-1117

rlborger(at)mac.com



On Feb 3, 2012, at 2:38 PM, europapa wrote:



 	  Quote: 	
		   

 

 Sorry Bob,

 

 didn't want to blame anybody.

 My engine is from 2004.

 That means you have to be careful when ordering a vacuum pump.

 

 Juergen

dpark748(at)hotmail.co.uk
Guest

Posted: Sat Feb 04, 2012 3:54 am Post subject: Cover for the vacuum pump mount necessary?

On the subject,

If the cover is just to prevent fod entering the hole surely a simple piece of alloy, drilled and fitted on to the studs is all that is required? I went for all electric and that is what i have done . Dave

Sent from my iPhone

On 3 Feb 2012, at 21:37, "Robert Borger" <rlborger(at)mac.com> wrote:

 	  Quote: 	

 Juergen,

 No problem!  I just wanted to make sure folks knew that the best parts available were discussed with Lockwood.

 My engine is also from 2004.  Yes, one must be careful when ordering any accessory that connects to the back of the gearbox.  There have been changes to the accessory pad over the years.

 Blue skies & tailwinds,

 Bob Borger

 Europa XS Tri, Rotax 914, Airmaster C/S Prop.

 Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP

 3705 Lynchburg Dr.

 Corinth, TX  76208-5331

 Cel: 817-992-1117

 rlborger(at)mac.com

 On Feb 3, 2012, at 2:38 PM, europapa wrote:

> 

> 

> Sorry Bob,

> 

> didn't want to blame anybody.

> My engine is from 2004.

> That means you have to be careful when ordering a vacuum pump.

> 

> Juergen

rlborger(at)mac.com
Guest

Posted: Sat Feb 04, 2012 4:22 am Post subject: Cover for the vacuum pump mount necessary?

David,

Yes, a simple alloy plate should do.  The fancier plate and gasket provided by Rotax seem to be most useful it you are removing prop governor.  In which case there is an oil channel required on the cover plate which completes an oil passage on the governor adaptor.

Blue skies & tailwinds,

Bob Borger

Europa XS Tri, Rotax 914, Airmaster C/S Prop.

Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP

3705 Lynchburg Dr.

Corinth, TX  76208-5331

Cel: 817-992-1117

rlborger(at)mac.com

On Feb 4, 2012, at 5:52 AM, david park wrote:

 	  Quote: 	

 On the subject,

 If the cover is just to prevent fod entering the hole surely a simple piece of alloy, drilled and fitted on to the studs is all that is required? I went for all electric and that is what i have done . Dave

 Sent from my iPhone

 On 3 Feb 2012, at 21:37, "Robert Borger" <rlborger(at)mac.com> wrote:

> 

> 

> Juergen,

> 

> No problem!  I just wanted to make sure folks knew that the best parts available were discussed with Lockwood.

> 

> My engine is also from 2004.  Yes, one must be careful when ordering any accessory that connects to the back of the gearbox.  There have been changes to the accessory pad over the years.

> 

> Blue skies & tailwinds,

> Bob Borger

> Europa XS Tri, Rotax 914, Airmaster C/S Prop.

> Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP

> 3705 Lynchburg Dr.

> Corinth, TX  76208-5331

> Cel: 817-992-1117

> rlborger(at)mac.com

> 

> On Feb 3, 2012, at 2:38 PM, europapa wrote:

> 

>> 

>> 

>> Sorry Bob,

>> 

>> didn't want to blame anybody.

>> My engine is from 2004.

>> That means you have to be careful when ordering a vacuum pump.

>> 

>> Juergen

> 

> 

> 

>

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