Re: Pump rebuild complete, but still leaking

["Fred Munro" <munrof@isys.ca>]

Wallace;

    If lapping the pump halves to a flat surface doesn't work, you can try
an old aircraft mechanics trick. Place a fine silk thread around the
circumference of the pump between the halves and bolt it up. The thread acts
like a fine gasket and usually seals up seeps. This was used to seal
aircraft engine crankcase halves when conventional methods failed. It has
the advantage of not changing the clearance between the parts you are
bolting together.

HTH

Fred Munro
'91 200q  260k km

-----Original Message-----
From: Wallace White <wallace@remdesign.com>
To: Quattro <quattro@coimbra.ans.net>
Date: Monday, October 12, 1998 1:17 PM
Subject: Pump rebuild complete, but still leaking


>Thanks to everyone who responded about the hydraulic fluid not coming
>out of the brake port while priming. It sounds like this is common, and
>that that side of the pump doesn't start working until you install it
>and bring it up to speed. It even took a little revving of the engine to
>get the brake light to go away and the bomb to get pressurized. But then
>everything worked fine, sure enough...
>
>...except that the pump is still leaking some, at the joint between the
>pump halves. Doing a quick steering lock-to-lock while parked was enough
>for the fluid to start showing itself along that joint. Foolishly I
>didn't check the flatness of the halves, as Mark Woodland described
>recently, so maybe I'll pull it back out and check that. Or if anyone
>has any other ideas, let me know.
>
>In general, the pump looked good inside. It really is a neat thing on
>the side, when you see the pistons in their rotary arrangement and all.
>The job went pretty well, though the piston caps (with their big +
>heads) were awfully tough to get off. I'm not sure if I was using the
>hand impact driver right, since I had no success with it, but a 15"
>breaker bar worked. I found that you really need to "shape" the drag
>link socket just right to get it to work well; otherwise it's all to
>easy to round those heads. What an odd fastener.
>
>- Wallace
>  '87 5kcstq 150k
>
>--
>
> Wallace White                             wallace@remdesign.com
> REM Design                                     tel 415.621.3922
> 290 Division St., Suite 401                    fax 415.621.4024
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