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Username Post: advice on new convertible motor & cylinders for 67        (Topic#358338)
df0rster 
Contributor
Posts: 109

Reg: 10-25-18
10-07-19 06:45 AM - Post#2777254    

I was installing a used pump for my convertible top and discovered it is not working well. It runs for about 15 seconds and kicks off. I'm guess it has a thermal overload and is not worth fixing??

Question is, can this be easily repaired or should I just get a new one? Next question, Lares and AutoPro have about the same price. Which is better quality? Lares has a lifetime warranty although I don't have any experience with them. AutoPro has a 5 year warranty.

Also, I need 1 cylinder because one of mine has a small dent & you can feel it slightly catching. It works but I'm afraid to put it in and have a leak later on. Should I just replace both cylinders plus the hoses? My hoses are fine although are 50+ years old. I don't have any convertible experience to speak of..

Any advice? Thanks!



 


Thierry 
"2nd Year" Silver Supporting Member
Posts: 21
Thierry
Loc: West Chester, PA
Reg: 04-30-04
10-07-19 09:34 AM - Post#2777268    
    In response to df0rster

About 20 years ago, the convertible pump wasn't working well in my 67. I followed the instructions in the manual to make sure the fluid level was correct and that fixed it.....until about 2 years ago when I found brake fluid all underneath the pump. I tried to repair the pump with a repair kit but that did not work. I ended up buying and installing a new pump from convertibleparts.com (works flawlessly with trans fluid), new cylinders (from summit, RLD-65TC, working great) and hoses (from summit, RLD-65THK) since I was replacing everything else. I realized the hoses were too long once I trashed the old ones. They work but I had to make them loop around so that they would not kink. If I was to do it again, I'd make sure the hoses are the same length as the old ones.

Other than that, with the 67 manual in hand, the whole thing is not terribly complicated.

T.

Thierry B. 67 Impala Conv, 327, TH-350


 
Thierry 
"2nd Year" Silver Supporting Member
Posts: 21
Thierry
Loc: West Chester, PA
Reg: 04-30-04
10-07-19 09:38 AM - Post#2777269    
    In response to df0rster

Does the pump work when you disconnect the cylinders from the top?

Thierry B. 67 Impala Conv, 327, TH-350


 
df0rster 
Contributor
Posts: 109

Reg: 10-25-18
10-07-19 10:15 AM - Post#2777271    
    In response to Thierry

well it actually was working right after I installed it (other than needing bled). Then as I was bleeding it by filling the reservoir and running it back and forth it started getting hot and stopping. I couldn't get it to work at all then. So I removed the whole setup and tried to set it up on the bench. It wouldn't run more than 15 seconds.

I went ahead and ordered a new Lares pump. It seemed to have a better warranty than the others I found. and they are all about the same price. I'll try it out on the bench with my old cylinders and then I can order new cylinders if needed.

Thanks for the tips! I'll update the post when I figure it out.



Edited by df0rster on 10-07-19 10:16 AM. Reason for edit: No reason given.

 
df0rster 
Contributor
Posts: 109

Reg: 10-25-18
10-07-19 10:41 AM - Post#2777273    
    In response to Thierry

curious about why you chose the RDL cylinders over the Auto Pro? I don't know anything about either company.

Also, you think replacing 1 cylinder is ok?

Thanks!



 
Thierry 
"2nd Year" Silver Supporting Member
Posts: 21
Thierry
Loc: West Chester, PA
Reg: 04-30-04
10-07-19 11:53 AM - Post#2777278    
    In response to df0rster

I did not choose the cylinders based on much research other than reading online reviews.

Thierry B. 67 Impala Conv, 327, TH-350


 
Thierry 
"2nd Year" Silver Supporting Member
Posts: 21
Thierry
Loc: West Chester, PA
Reg: 04-30-04
10-07-19 11:56 AM - Post#2777279    
    In response to df0rster

The issue with using old cylinders is that you risk contaminating the new trans fluid with the old brake fluid. If budget permits, I'd favor getting new cylinders.

Thierry B. 67 Impala Conv, 327, TH-350


 
df0rster 
Contributor
Posts: 109

Reg: 10-25-18
10-08-19 07:59 AM - Post#2777366    
    In response to Thierry

Thanks for the input! I'll update with my results.



 
df0rster 
Contributor
Posts: 109

Reg: 10-25-18
10-15-19 10:26 AM - Post#2777944    
    In response to Thierry

well I should have taken your advice on replacing all the components.. (explained below)

I did get the hydraulics working good. Ordered a new Lares pump, it all works great (mostly).

My bleeding technique was to do it on the floor. install the cylinders and leave the two pump connectors in a bucket of ATF, and then pull the cylinders back and forth (was hard) while sucking up fluid and shaking the cylinders to get all the bubbles out. It worked well. Then I filled the new pump and connected the fittings and worked it back and forth with a battery and check the fluid level. It worked like a charm.

Finally installed into the car intact and didn't have to remove hoses. Just loosed one slightly to rotate a hose.

My only problem now is that I only replaced one cylinder because it was damaged. I didn't anticipate what would happen. The old cylinder works fine, but is noticeably easier to move. So one side goes quite a bit faster and the top goes up uneven. Not sure if the new cylinder will wear in and even out eventually, or if it will cause any problems. If you stop it for a second they even out. But I'd have replaced both if I had thought about that issue.

Lesson learned..

Well i just thought of something. Maybe with the fabric installed it will even things out better since the whole thing will be stiffer. We'll see.



Edited by df0rster on 10-15-19 10:28 AM. Reason for edit: No reason given.

 


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