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PAS box bottom seal


RGK

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Help!

I've recon'd a PAS box...We'll new seals, cleaned put it back together thought I did a pretty good job.

Refit, bleed and ran in (stationary on axle stands,  lock to lock) worked perfectly.

However once on the deck I tested the steering then notice fluid on the floor.

The bottom seal leak/ pours out only on right hand steering/ lock.

Does anyone know why?

Thanks

Edited by RGK
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If the area where the seal contacts the shaft is damaged / worn / you will have difficulty making a leak proof seal even with genuine parts. Both my 90 and my discovery II leaked like sieves with genuine seals.  After fitting Zeus seals both steering boxes are sorted. I believe that the Zeus kit seals to a different area of the shaft avoiding the damaged / worn areas.  

Bloody tight fit to get the Zeus seals in though!

as to why it only leaks at full right lock, I would guess that the pump is producing maximum pressure on full lock - both at full left and full right. Not sure why it’s OK without weight on the wheels...

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15 hours ago, ianmayco68 said:

What was wrong with it before you reconditioned it ? And did you loosen any bolts on it or take anything apart ? 

I took the whole thing apart and cleaned.

The bottom seal was leaking before hand.

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I’m no expert on this but could it be that the shaft is tilting when on full lock , and I think I remember reading somewhere that the big screw on the side of the box with the grub screw under it if tightened takes the play out of the shaft , might be total rubbish but could be a possibility.

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I spoke to the parts supplier yesterday and their technical person.

2 responses:

1st via sales...

"We has lots of instance of this seal failing. One guy tried it 4 times before giving up."

2nd technical...

"The plastic/ rubber seal can create hair line mark on the shaft that van course failure when under high pressure"

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52 minutes ago, ianmayco68 said:

I’m no expert on this but could it be that the shaft is tilting when on full lock , and I think I remember reading somewhere that the big screw on the side of the box with the grub screw under it if tightened takes the play out of the shaft , might be total rubbish but could be a possibility.

That makes sense. I'll adjust it and let you know.

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