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  #1  
Old 12-24-2003, 12:33 PM
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Join Date: Dec 2001
Location: LaPorte, IN
Posts: 400
Hydraulic pump re-seal

'89 560sel, 113,000 miles. front of suspension pump leaking. I've seen several threads mention re-sealing the pump, nothing about how or whether there may be a repair kit. Does not seem to be leaking into the engine, only all over the outside. Thanks.
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Earl McLain
'02 C230 Kompressor
'89 560 SEL "Frau BlueCar" (retired April 2004)
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  #2  
Old 12-26-2003, 09:14 AM
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Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Never seen an external leak from any of those pumps, all the same way back to 1976!
Only replacement parts are an O-ring, shaft seal, & mounting gasket.
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  #3  
Old 12-26-2003, 11:33 AM
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Location: LaPorte, IN
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Thanks Doc

Kind of figured that given the low number of posts. Have had a little fluid in that area for the 3 years i've had the car, but everything was clean after the timing chain job, and i can see that only the bottom half of the susp pump is getting oily. hydraulic reservior lowers slightly each day, and the drips dropping from the trans cooler line have that sticky feel of Febi suspension fluid. P/S fluid is staying level and the loss would be too small to notice in as engine oil rising. Don't see the mounting gasket as a FastLane item, and there are 5 or 6 pages listed in PartShop when i search for "gasket", no clue which of 50 or so it might be!! Would a gasket sealer work there?
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Earl McLain
'02 C230 Kompressor
'89 560 SEL "Frau BlueCar" (retired April 2004)
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  #4  
Old 12-26-2003, 12:14 PM
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Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
MB part numbers are 001-997-01-47 for the pump shaft seal.
010-997-43-45 for the o-ring.
114-236-00-80 for the mounting gasket.
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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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  #5  
Old 12-26-2003, 12:34 PM
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Join Date: Oct 2002
Location: Colorado Springs
Posts: 481
greenacres,
DId this exact job, The problem is that the seal is done through good machining with rubber only working to support the good tight machine fit. I had no luck resealing mine. It slowed down but did not stop. I found a used pump for $100 and popped it on, now the engine is dry as a bone. I talked to my mechanic and he said when these usually leak from the front seal they are almost impossible reseal. The rear seal is easier to do and can be rebuilt more sucessfully.
m
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Martin Ingram
Colorado Springs
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)
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  #6  
Old 12-26-2003, 01:50 PM
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Join Date: Dec 2001
Location: LaPorte, IN
Posts: 400
Thanks guys

I'll keep an eye out for a used pump. If the failure rate is very low, should be a safe bet when i find one.
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Earl McLain
'02 C230 Kompressor
'89 560 SEL "Frau BlueCar" (retired April 2004)
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  #7  
Old 12-29-2003, 11:00 AM
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Join Date: Dec 2001
Location: LaPorte, IN
Posts: 400
Maybe not suspension pump

Spent much of saturday chasing little drips. In the process, i'm thinking it is more likely P/S fluid than hydraulic fluid. The P/S pump was pretty clean, but the area around the low pressure return hose is the wettest. Since the P/S fluid looks so much like the hydraulic fluid, is there any way to dye one of them to get a better feel? Given the location of the seepage, the fan blows it all over once it's out. Thanks.
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Earl McLain
'02 C230 Kompressor
'89 560 SEL "Frau BlueCar" (retired April 2004)
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  #8  
Old 12-29-2003, 11:19 AM
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Join Date: Oct 2002
Location: Colorado Springs
Posts: 481
not sure of using a dye, but low pressure hose replace ment is easy and very cheap@$15 for the hoses and 40 mins to do the work.
m
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Martin Ingram
Colorado Springs
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)
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