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#1
03-26-2006, 04:41 AM
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W126 PS pump rebuild goes bad!
I finally got around to resealing the PS pump on my SD and now I have no PS.
 Goes from leaking to none... not what I wanted. Anyway, I've taken it apart three times now to no avail. I have the locater pins all the way into the pump body per the manual, and still no dice. Do I need to bleed the system more? Is there a fitting I can loosen somewhere if I have air in the system? 
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I'm not a doctor, but I'll have a look.  '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG] 
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#2
03-26-2006, 07:34 AM
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I haven't done one yet (I plan to shortly), and from what I've read in several posts, the orientation of the pump vanes and associated components is extremely critical with the operation of the unit. Your seals are fine.
Just a hunch...
__________________
2009 ML350 (106K) - Family vehicle 2001 CLK430 Cabriolet (80K) - Wife's car 2005 BMW 645CI (138K) - My daily driver 2016 Mustang (32K) - Daughter's car
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#3
03-26-2006, 08:06 AM
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I did have one vane fall out but I placed it back, it was a PITA for sure. I'm going to rebleed the system here in a few hours after I take a nap.
The other thing that came to mind was that pressure reg valve, yet I did not remove it...
__________________
I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#4
03-26-2006, 01:14 PM
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Does the 126 have the bleed screw on the steering gearbox that the 114s have? Looks like a brake bleeder thingy. If so, I'd put a hose on it back to the res and run till no air comes out.
Michael
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Usta haves '69 250/8, '76 280C, 1971 250C 114.023, 1976 450SEL 116.033 Current have, 1983 300SD 126.120
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#5
03-26-2006, 06:38 PM
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Would that bleeder be on the top or bottom of the gearbox?
__________________
I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#6
03-28-2006, 03:28 AM
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Weird stuff today, pump works again. Just started driving it and then around 30min later it worked fine.
Go figure.
__________________
I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#7
03-28-2006, 11:25 AM
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It probably had air in it that worked itself out.
The bleed screw, if there is one, would be on the upper side and above the bearing preload adjustment. It may still have the rubber cover but looks like a brake bleeder. Michael
__________________
Usta haves '69 250/8, '76 280C, 1971 250C 114.023, 1976 450SEL 116.033 Current have, 1983 300SD 126.120
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