How to replace a 603 vacuum pump. - Page 4 - PeachParts Mercedes-Benz Forum

Hatterasguy · #46 11-24-2004, 10:53 AM

Quote:

Originally Posted by ScrewDriver

Hattie, Did you have to remove the "assembly basket" in installation? Did you have to use any "special tools" required?

I have no idea what this basket is?

It must not be on the older 603's. Gsxr seems to know about them.

ScrewDriver · #47 11-24-2004, 11:01 AM

Ah, I'm looking at the directions on assembly of the Pierburg. It states,"on older models the basket should be removed". I'm assuming pre 80 models

gsxr · #48 11-24-2004, 11:18 AM

I thought this was covered earlier in the thread - maybe not. Most OM60x diesels up to about 1990 have the assembly basket left in from the factory. It must be removed if you use the 'dam' style gasket (see photo). The dam gasket is only required for engines prior to the engine #'s listed (for OM603 - I don't know about OM601/602 - may not apply to those). The basket retaining bolts hit the dam gasket, and it will deform and leak like a sieve (don't ask how I know). Later engines can leave the basket in place and use the 'outline' gasket. This is documented in the factory service manual - here's the relevant PDF file (scroll down a couple of pages):

http://www.meimann.com/docs/mercedes/OM603_vac_pump_mod.pdf
(1.4MB PDF file)

#49 11-24-2004, 05:31 PM

Replaced the vacuum pump today. I used the old gasket, "open end" gasket, no basket. It ran fine. Took about an hour and a half. You can see why these were repalced. Thanks to "SrewDrivers" facilities(my father's) and Juan. Also many thanks to Hattie and GSXR,

,totaled about an 1.5 hours. Wonder what it would have cost at a INDY?

I used the old,(open) gasket, with the basket in place

sixto · #50 11-24-2004, 10:42 PM

So if Hatterasguy's SDL didn't have the basket, was his pump replaced previously?

I'm paranoid so I put back the basket in hopes that if the bearing fails I'll have a few seconds of rattling as a warning.

Sixto
95 S420
87 300SDL

ScrewDriver · #51 11-25-2004, 12:03 PM

If the old gasket is fine, just leave the basket in. If you use the "dam" type gasket, the new one. You will have to remove the "basket". Check GSXR's thread. Mine is working just fine. The "dam" gasket is supposed to catch any metal shavings to prevent it from getting into the engine. You need to save the basket if you remove it.

Hal Scripka · #52 11-25-2004, 01:22 PM

I also just replaced my pump. The pump came with a dam type metal gasket. So I removed the basket as instructed. No leaks, works great.

1987 300SDL 170,000

Hatterasguy · #53 11-25-2004, 06:23 PM

Hmm mine had no basket and the paper gasket without the pocket when I took it off?

It was an old style pump so if someone changed it they did it awhile ago. I just stuck the new one on without the basket. The basket is just their to catch the bearings right?

gsxr · #54 11-25-2004, 08:48 PM

The *real* purpose of the basket is to keep the timing advance device in place when the injection pump is installed. When you R&R the IP on a later engine, you're supposed to install the basket, R&R the pump, then remove the basket when done. The fact that it helps keep bearing parts out of the oil was an unexpected side benefit.

Ken300D · #55 11-25-2004, 09:26 PM

When I replaced my older style vacuum pump, I found it had the "open" gasket and no "assembly basket" in there. The new pump came with the "dam" type gasket, metal with a coating on it. That's what I used with the new pump. I presume that dam gasket captures an oil bath that better lubricates the vacuum pump.

There is also an instruction with the new pump to put about 50 cc of oil down the vacuum pipe when first starting up after the installation. Rather than do it that way, I put oil in until full and then turned the crank over with a socket wrench. That pulled in the oil into the vaccum pump and then I repeated this several times. Guess that makes sure the pump is lubricated initially when installed.

Ken300D

sixto · #56 11-25-2004, 11:48 PM

Ah, so maybe the IP was pulled in the past and the pump was reused.

Sixto
95 S420
87 300SDL

#57 11-26-2004, 12:53 AM

Well if you do decide to leave the basket in with the new style pump and use the open gasket, it will work and should be just fine.

sixto · #58 11-26-2004, 01:42 AM

FWIW the Pierburg I got earlier this year came with a dam gasket. I got a -07- gasket separately and donated the dam gasket to science.

Sixto
95 S420
87 300SDL

Hatterasguy · #59 11-26-2004, 08:57 AM

Hmm maybe the IP was off at some point? Do I need the dam gasket or basket? It wouldn't be a big deal to install them.

#60 11-26-2004, 09:56 AM

Hattie, I didn't install that "dam" gasket back in. I took the "old open" gasket and cleaned it up and re-installed it. I just drove 200 miles yesterday back to Austin and everything was okay. I haven't heard anyone state that you have to use the "dam" gasket. I actually didn't want to take that basket out in fear that at some point I may need it. Me trying to hold on to something and put it away for later use is scary. I'd misplace that "basket" in a second.