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Engine mounts

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ftyoder(at)yoderbuilt.com
Guest

Posted: Thu Jul 17, 2014 2:25 pm Post subject: Engine mounts

My Cont. IO-240  B Engine mounts are 16 years old and need to be replaced. They are conical,  of course. What are the ones I need and does anyone have the instillation  instructions, torque?

  

 Thanks,

  

 Tim

    	 		 			 				 			 		 		 			

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bakerocb

Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

Posted: Thu Jul 17, 2014 8:37 pm Post subject: Engine mounts

7/17/2014

  

 Hello Tim, I am surprised that you have not had to replace the vibration  isolators for your IO-240 B engine mount prior to this. These vibration  isolators are rubber or elastomeric material that hardens and sags with age.  Replacing these isolators is a bit tricky for several reasons. One reason is  that the isolators are very similar / identical to, yet in some respects, quite  different than the isolators used for the Continental O-200 engine. I have had a  Continental engineer give me false information regarding isolators for the  IO-240 B because he assumed that the parts for the O-200 and the IO-240 B were  identical in all respects, which they are not. 

  

 It would be very helpful if you have the TCM Parts Catalog Form X30623A and  can look at Figure 12-4 on page 12-8 of that manual. Iâ€™ll try to give you a  description of what is on that page using the following Index Numbers from  Figure 12-4:

  

 12-4-1 Part Number 638225. Bushing. An elastomeric tube unique to the  IO-240 B (Not the same part as used in the O-200, but performs a similar  function as Hose, Part number 628555-16 which is Ref No 1 on the Aircraft Spruce  page below). Four required. Should be replaced. Expensive. Not readily  available. I can give you some purchasing source information after I get out to  the hangar on Sat. Also see below**.

  

 http://www.aircraftspruce.com/catalog/eppages/contmountparts.php

  

 12-4-2 Part Number 530626. Seat, Engine Mount. A steel ring. Same part as  used in the O-200. Eight required. No need to replace these parts unless damaged  or lost â€“ can be used over and over. See Ref No 3 on the above Aircraft Spruce  page:

  

 12-4-3 Part Number 530740. Bushing, Engine Mount. An elastomeric cone. Same  part as used on the O-200. Eight Required. Should be replaced. Available from  Spruce. See Ref No 4 on the above Aircraft Spruce page:

  

 12-4-4 Part Number 530741. Washer, Cup. A cup shaped steel washer. Same  part as used on the O-200. Eight required. No need to replace these parts unless  damaged or lost â€“ can be used over and over. Available from Spruce. See Ref No 5  on the above Aircraft Spruce page:

  

 12-4-5 Part Number 653695. Spacer, Engine Mount. A steel tube. I donâ€™t know  how this part for the IO-240 B compares to Part Number 530627 for the O-200, but  it performs the same function. (See Ref No 2 on the Aircraft Spruce page above).  Four required. No need to replace these parts unless damaged or lost â€“ can be  used over and over.

  

 If the above appears confusing I apologize and blame TCM for mucking this  up. Please pay careful attention in order to avoid getting the wrong parts. Iâ€™ll  write a few words about installation in a separate email.

  

 OC

  

 'O C' Baker  says "The best investment you can make is the effort to gather and understand  information."

  

 **PS: Here  are some sources â€“ I might have a better source at my hangar:

  

 http://www.aircraft-specialties.com/bushing-638225/

  

 http://www.airpowerinc.com/productcart/pc/prodpartsV.asp?searchquery=638225&submit=Search&catID=6&mfgID=TC&subcat=0

  

 http://www.skygeek.com/continental-motors-638225-bushing.html

  

 ===========================

    

  From: Tim Yoder (ftyoder(at)yoderbuilt.com) 

 Sent: Thursday, July 17, 2014 6:25 PM

 To: kis-list(at)matronics.com (kis-list(at)matronics.com) 

 Subject: Engine mounts

  



  My Cont. IO-240 B  Engine mounts are 16 years old and need to be replaced. They are conical, of  course. What are the ones I need and does anyone have the instillation  instructions, torque?

  

 Thanks,

  

 Tim



[quote] [b]

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Keith.Miller(at)esa.int
Guest

Posted: Thu Jul 17, 2014 11:03 pm Post subject: Engine mounts

OC



 at what age / hours  did you replace your  bushings  ? ,  is there a

recommended time  for the replacement , plus is there a TCM bulletin on

this  ?



Keith



From:	"Owen Baker " <bakerocb(at)cox.net>

To:	<kis-list(at)matronics.com>, "YODER TIM" <ftyoder(at)yoderbuilt.com>,

Date:	07/18/2014 06:38 AM

Subject:	Re: Engine mounts

Sent by:	owner-kis-list-server(at)matronics.com



7/17/2014



Hello Tim, I am surprised that you have not had to replace the vibration

isolators for your IO-240 B engine mount prior to this. These vibration

isolators are rubber or elastomeric material that hardens and sags with age.

Replacing these isolators is a bit tricky for several reasons. One reason is

that the isolators are very similar / identical to, yet in some respects,

quite different than the isolators used for the Continental O-200 engine. I

have had a Continental engineer give me false information regarding isolators

for the IO-240 B because he assumed that the parts for the O-200 and the

IO-240 B were identical in all respects, which they are not.



It would be very helpful if you have the TCM Parts Catalog Form X30623A and

can look at Figure 12-4 on page 12-8 of that manual. Iâ€™ll try to give you a

description of what is on that page using the following Index Numbers from

Figure 12-4:



12-4-1 Part Number 638225. Bushing. An elastomeric tube unique to the IO-240

B (Not the same part as used in the O-200, but performs a similar function as

Hose, Part number 628555-16 which is Ref No 1 on the Aircraft Spruce page

below). Four required. Should be replaced. Expensive. Not readily available.

I can give you some purchasing source information after I get out to the

hangar on Sat. Also see below**.



http://www.aircraftspruce.com/catalog/eppages/contmountparts.php



12-4-2 Part Number 530626. Seat, Engine Mount. A steel ring. Same part as

used in the O-200. Eight required. No need to replace these parts unless

damaged or lost â€“ can be used over and over. See Ref No 3 on the above

Aircraft Spruce page:



12-4-3 Part Number 530740. Bushing, Engine Mount. An elastomeric cone. Same

part as used on the O-200. Eight Required. Should be replaced. Available from

Spruce. See Ref No 4 on the above Aircraft Spruce page:



12-4-4 Part Number 530741. Washer, Cup. A cup shaped steel washer. Same part

as used on the O-200. Eight required. No need to replace these parts unless

damaged or lost â€“ can be used over and over. Available from Spruce. See Ref

No 5 on the above Aircraft Spruce page:



12-4-5 Part Number 653695. Spacer, Engine Mount. A steel tube. I donâ€™t know

how this part for the IO-240 B compares to Part Number 530627 for the O-200,

but it performs the same function. (See Ref No 2 on the Aircraft Spruce page

above). Four required. No need to replace these parts unless damaged or lost

â€“ can be used over and over.



If the above appears confusing I apologize and blame TCM for mucking this up.

Please pay careful attention in order to avoid getting the wrong parts. Iâ€™ll

write a few words about installation in a separate email.



OC



'O C' Baker says "The best investment you can make is the effort to gather

and understand information."



**PS: Here are some sources â€“ I might have a better source at my hangar:



http://www.aircraft-specialties.com/bushing-638225/



http://www.airpowerinc.com/productcart/pc/prodpartsV.asp?searchquery=638225&submit=Search&catID=6&mfgID=TC&subcat=0



http://www.skygeek.com/continental-motors-638225-bushing.html



===========================



From: Tim Yoder

Sent: Thursday, July 17, 2014 6:25 PM

To: kis-list(at)matronics.com

Subject: Engine mounts



My Cont. IO-240 B Engine mounts are 16 years old and need to be replaced.

They are conical, of course. What are the ones I need and does anyone have

the instillation instructions, torque?



Thanks,



Tim

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