Flush yer PSDs.....

 

I need to do a PSD flush on mine as well. Is there a good how-to thread for PSD maintenance?

 

J.P.,

Here's one.

http://www.928intl.com/repair/psd1.pdf

 

Perfect. Thanks, Bertrand!

 

Ehwwww.... Did it clean up OK?

 

Rumor has it I may get this car back tomorrow

 

Rumors are true- thrashed yesterday to replace the leaking rear main seal, which I had replaced 12 miles ago but buggered during the install, and in the process discovered the car had a GTS release bearing and guide tube but an -07 release arm, so I swapped in an -09 release arm and a fresh friction disc while I was in there.

Got the car presentable to drop off at Mark's tonight- still needs a good paint detailing and chip repair, and the PSD pump is still on the bench, and, and, and... But for now, it's safe in Mark's garage while I work on the GTS this week.

 

Mmm.. cobalt looks so awesome.

Shame its not an '89 GT

Excellent work Rob!

 

Rob you are always ready to help everybody... so next time you need to do one of these call me and I'll be happy to loan you the right tool.
Compliments on a job well done and sharing/education many of us while doing it!

 

Herman those are great tools to have.
Rob that car looks spectacular your attention to detail is excellent.
Mark gets a great ride

 

Stan,

You're in the same category as Rob always ready to help so count yourself in as one of the guys I would loan this tool when needed.

Best Herman

 

Thanks Herman.

 

Hey Rob, I see you took off the PSD motor, can you elaborate on what that allowed you to do (i.e. just clean the gunk visible around the motor shaft or maybe reach some other stuff with it off?). I don't recall past PSD write-ups mentioning taking stuff apart other than to replace the plastic reservoir & filter.

Also, isn't there some peculiarity about keeping the PSD upright in it's installed orientation? Something about the pump will quit if you turn it in a different direction or something like that ...

 

Hi Tom- The pump motor is held to the pump with 2 M6 SHCS, and a rubber square-profile gasket. I basically took the unit out of the car and apart in order to flush all the old brake fluid gunk out the pump, the hard lines, the accumulator (note, there's a gasketed philips head screw in the top of the accumulator- after 6 years of sitting plus however long since the PSD pump actually worked, it still released a pretty stout blast of pressure when I undid it....), and the valve block. Took a couple of hours and a whole can of brake cleaner. The motor took a brief beading in the blast cabinet to get the rest of the schmutz out of it (followed by a thorough rinsing/cleanout!)

I have no idea what torque value would be appropriate for the pump cap screws, am hoping that 7 ft-lbs is in the ballpark. If it leaks, I will tighten them, +/- matching a new gasket out of the McMaster catalog

RE: the orientation of the unit affecting pumping, I dunno- People have commented that it can be hard to get it primed, but the cap on the reservoir is identical to that on the brake MC reservoir, so a pressure bleeder will fit on it. I am planning on bench-priming it tonight with 3-4 psi of head pressure on the reservoir to get things flowing.

The pics aren't good but in the periphery you can see the pump-motor gasket and the filter screen that fits in the perimeter of the pump housing. (That stain on the towel is the gunk that oozed out of the pump body when opening it up..._)

 

Didn't quite get around to working on the rootwood before handing the Cobalt car back to Mark, so I grabbed some spare door cards and console surround to re-color so the car's not driving around naked while I'm busy trying not to ruin the wood.