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Re: cruise control servo diaphragm [Re: rftroy] #1574444
02/10/14 12:34 AM
02/10/14 12:34 AM
Joined: Feb 2005
Posts: 709
St Louis, MO 63026
convx4 Offline
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St Louis, MO 63026
This is a good post on making urethane parts.

http://www.garagejournal.com/forum/showthread.php?t=234881

Re: cruise control servo diaphragm [Re: NachoRT74] #1574445
02/10/14 12:42 AM
02/10/14 12:42 AM
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NB, Canada
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moparfan53 Offline
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Quote:

unfixable diaphragm



What specifically is wrong with your's?
Can you you post a pic?

Re: cruise control servo diaphragm [Re: moparfan53] #1574446
02/10/14 11:38 AM
02/10/14 11:38 AM
Joined: Aug 2007
Posts: 6,089
Valencia, España
NachoRT74 Offline OP
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Valencia, España
Quote:

Quote:

unfixable diaphragm



What specifically is wrong with your's?
Can you you post a pic?




My car and it parts is not with me, is on a body job, around 800 miles from home... BUT the pic I posted shows a broken diaphragm like mine is. You can see is not fixable.

I have in fact TWO SERVOS with similar conditions diaphragm

My car never got CC, but I wanted to install. It took me maybe 4 years to get all the correct parts from board friends and ebay. Mostly parts used ( except tranny and speedo cables )


With a Charger born in Chrysler assembly plant in Valencia, Venezuela
Re: cruise control servo diaphragm [Re: convx4] #1574447
02/10/14 12:00 PM
02/10/14 12:00 PM
Joined: Aug 2007
Posts: 6,089
Valencia, España
NachoRT74 Offline OP
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Quote:

Sounds like a challenge.
If no one else is up for it, send me your bad ones and I will see what I can do.






I'm overseas, thanks for the offer.


With a Charger born in Chrysler assembly plant in Valencia, Venezuela
Re: cruise control servo diaphragm [Re: rftroy] #1574448
02/10/14 12:04 PM
02/10/14 12:04 PM
Joined: Aug 2007
Posts: 6,089
Valencia, España
NachoRT74 Offline OP
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Quote:

Quote:

I guess sucking throught the hose and checking the diaphragm moving... or not




So you don't make a wrong diagnosis, you can't test the diaphragm by putting vacuum on the tube. There is an internal vacuum release valve that prevents vacuum from building up until, 1. The electrical circuit is activated, and 2. The input rotational speed of the speedo cable is about 25 mph.

You could, conceivably, hook up the electricals, and rig some way to turn the speedo input, while applying vacuum. Just be careful that you don't rotate it too fast or you will grenade the insides. I've never needed to do this on the few that I have repaired, but I wouldn't recommend using a drill motor.

I have the factory speed control manual, which has pictures and gives a thorough description of operations, but it is a 21Meg zip file.
I will try and find the link from which I downloaded it and post it later.

Robert




yeap actually I didn't make a full diagnosis, BUT the diaphragm diagnosis was made visually LOL... it is broken!


With a Charger born in Chrysler assembly plant in Valencia, Venezuela
Re: cruise control servo diaphragm [Re: NachoRT74] #1574449
02/27/14 01:06 PM
02/27/14 01:06 PM
Joined: Aug 2007
Posts: 6,089
Valencia, España
NachoRT74 Offline OP
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If GM/AC Delco got service parts for this, I don't think Chrysler or its cruise control manufacturer supplier didn't...

http://www.ebay.com/itm/NOS-GM-Cruise-Co...47a&vxp=mtr


With a Charger born in Chrysler assembly plant in Valencia, Venezuela
Re: cruise control servo diaphragm [Re: NachoRT74] #1574450
02/28/14 04:01 AM
02/28/14 04:01 AM
Joined: Jan 2003
Posts: 52
Sarasota FL.
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surfman Offline
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I have several cars that have factory cruise and for many years the only problem is that the rubber diaphram gets a small hole or tear in it due to being old and getting dried out from the underhood heat. I have successfully repaired seveal of these diaphrams You need to disassemble the servo with a 5/16 nutdriver and carefully remove the diaphram and the sring inside the case hold it up to a strong light and stretch the rubber carefully you will be able to see light through the tear as long as it is not under the paper washer under the metal pull cnter spindle. clean it well with acetone or thinner and buff the area with a stitch buffer then clean again and use a tube repair kit with the proper sized patch and rubber cement. let it dry then wipe the rubber parts down with armourall or a rubber lubricant not on the sealing lip though and use a little silicone sealer to secure the diaphram to the cruise case or it may leak. This has worked for me many times If the diaphram is extemely damaged or torn this will not work and you will need to get a donor diaphram. Good Luck

Re: cruise control servo diaphragm [Re: surfman] #1574451
02/28/14 06:16 PM
02/28/14 06:16 PM
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Valencia, España
NachoRT74 Offline OP
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trust me, I already dissasembled and the ones I have are not fixable like that... they are not just small holes

Now wondering... watching carefully the newer units, the cable attaching and everything... IT SEEMS the diaphragm could be same size from older units ?


http://www.ebay.com/itm/DODGE-RAM-CHRYSL...f34&vxp=mtr


With a Charger born in Chrysler assembly plant in Valencia, Venezuela
Re: cruise control servo diaphragm [Re: NachoRT74] #1574452
02/28/14 09:37 PM
02/28/14 09:37 PM
Joined: Jan 2003
Posts: 3,704
MICHIGAN
DynoDave Offline
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Quote:

trust me, I already dissasembled and the ones I have are not fixable like that... they are not just small holes

Now wondering... watching carefully the newer units, the cable attaching and everything... IT SEEMS the diaphragm could be same size from older units ?


http://www.ebay.com/itm/DODGE-RAM-CHRYSL...f34&vxp=mtr




This unit looks like the one I added to my Omni years ago. It was smaller in diameter than the unit on my '70s cars. You could try it, but I'm not sure the diaphragm would be big enough in diameter to swap them.


DynoDave
Walter P. Chrysler Club - Great Lakes Region
Member # 12304
1970 Plymouth Duster
1972 Dodge Charger Rallye
https://wichargerguy.proboards.com/
1977 Chrysler Cordoba
Re: cruise control servo diaphragm [Re: NachoRT74] #1574453
02/28/14 11:33 PM
02/28/14 11:33 PM
Joined: Jun 2003
Posts: 21,342
It's a dry heat
gtx6970 Offline
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It's a dry heat
Quote:


Now wondering... watching carefully the newer units, the cable attaching and everything... IT SEEMS the diaphragm could be same size from older units ?


http://www.ebay.com/itm/DODGE-RAM-CHRYSL...f34&vxp=mtr




Nope

later ones are smaller in diameter

Re: cruise control servo diaphragm [Re: gtx6970] #1574454
03/04/14 04:43 PM
03/04/14 04:43 PM
Joined: Aug 2007
Posts: 6,089
Valencia, España
NachoRT74 Offline OP
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looking forward to repro de diaphragm locally... someone interested ?

just rubber section... plate and pin would need to be reused somehow.

no price or anything, is a project what floated on talking with a guy locally what works on a brakes rubber stuff factory. He told me is "doable". making some will make a cheaper production.


With a Charger born in Chrysler assembly plant in Valencia, Venezuela
Re: cruise control servo diaphragm [Re: NachoRT74] #1574455
03/08/14 06:48 PM
03/08/14 06:48 PM
Joined: Jan 2003
Posts: 3,704
MICHIGAN
DynoDave Offline
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I might be interested in a spare, Nacho, if I knew more about how it would attach.


DynoDave
Walter P. Chrysler Club - Great Lakes Region
Member # 12304
1970 Plymouth Duster
1972 Dodge Charger Rallye
https://wichargerguy.proboards.com/
1977 Chrysler Cordoba
Re: cruise control servo diaphragm [Re: DynoDave] #1574456
03/09/14 02:42 AM
03/09/14 02:42 AM
Joined: Aug 2007
Posts: 6,089
Valencia, España
NachoRT74 Offline OP
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I'll have to figure it out too... center pin is riveted to the plate, so I'll have to drill it out gently, just enough to be able to remove and maybe weld it back? dunno.

or dill and threath it in, to use an screw...

dunno yet


With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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