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  #1  
Old 08-09-2018, 09:29 PM
p38fighter p38fighter is offline
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Default Convertible top motor problem. Want opinions

1959 convertible
Please review the following and see if Iíve forgotten anything. Feel free to offer opinions or alternate procedures.
The facts:
Car was not run for at least 11 years. Now running.
Hydraulic hose for top was repaired with duct tape. Leaking is obvious.
Pump reservoir is almost empty.
Pump motors runs when power is applied.
Rams do not function properly when power applied probably due to no fluid and /or due to age there could be other issues.
Pitting may have occurred on the exposed ram shafts.
Concerns:
After filling the reservoir - Under pressure ram seals and or pump seals may blow out with consequent damages.
Rams and pump may prove inoperable anyway.
The plan:
Remove the pump and rams as a unit and secure to the bench. Replace all hoses. Add fluid and apply power for several cycles. If everything works clean up and reinstall. If something fails replace and then reinstall.
Thanks, Chris
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  #2  
Old 08-09-2018, 09:43 PM
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partsetal partsetal is offline
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The owners manual directed that the reservoir be filled with brake fluid. You may still have brake fluid in the system. The system should be flushed with ATF until any BF residue is gone. I stick the ram with a hose on one port in a container of ATF and cycle the ram until fresh atf replaces whatever is in there. Take the end off the pump to empty it and to see if there is any debris or residue of brake fluid in the reservoir. Assemble and fill with clean atf and operate the pump in both directions (hose attached) and repeat until clean atf remains. Add new hoses and you should be good to go.
Carl
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  #3  
Old 08-09-2018, 09:51 PM
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jopizz jopizz is offline
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Quote:
Originally Posted by p38fighter View Post
The plan:
Remove the pump and rams as a unit and secure to the bench. Replace all hoses. Add fluid and apply power for several cycles. If everything works clean up and reinstall. If something fails replace and then reinstall.
Thanks, Chris

With the hoses disconnected I would move the pistons in and out by hand to make sure there's no residual fluid left. I would remove the reservoir from the pump (gaskets can usually be reused, make a mark (if it's not marked already) on both the pump body and the end plate so it goes back in the same place) and clean it out. Chances are it's got some caked brake fluid inside. Put everything back together on the bench with new hoses and use Type F transmission fluid and not brake fluid. Fill the pump to the bottom of the hole and cycle the motor a few times in both directions. Bleed the pump after every cycle and add more fluid if necessary. If after five or six cycles the pistons move freely in and out and fully extend and retract with no leaks it should be ok to put back on the car. I've put them on as a unit before so you shouldn't have any problem.

John
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Old 08-09-2018, 10:39 PM
p38fighter p38fighter is offline
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Thanks Carl and John. I'll report back when I'm finished...
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