New style hand primer replacement..Help - PeachParts Mercedes-Benz Forum

NC240D76 · #1 10-25-2004, 08:54 PM

I know this subject has been covered but all my searches have found is mention of changing or needing to change over to the new style primer. Nowhere did I find instructions on removing the old style and installing the new one. I am sure it is here somewhere but it is hiding from me.
1976 240d auto.

Please help with a link or instructions.

Thanks,
Brian

oldnavy · #2 10-25-2004, 09:12 PM

You take a wrench and take it off and then put new one on in it's place. Lrfty Lucy...Righty tighty. Here's a place that sell's them and it will come with instuctions. ************** Lot's of their stuff come with instructions to install.

d.delano · #3 10-25-2004, 09:17 PM

24mm crowfoot wrench, ratchet or breaker, long extension, get the wrench on the bottom of the old pump, turn CCW and remove. Easy as pie. 17mm crowfoot installs the new one. Yes, you need the crowfoot. Buy a cheap set or borrow somebody's, but it's a 2 minute no-hassle affair with a crowfoot. You can use stubby open end wrenches too, but nuthin' beats the crowfoot for this job.
Some on this forum will advise you to just grab it with a set of vice-grips. That method lacks finesse, and is destructive to the old pump. Mine wasn't leaking when I replaced it so I still have it.

Palangi · #4 10-25-2004, 09:18 PM

As I recall, it's a bit more challenging on the 115 car. I don't remember exactly what all I had to take off, but I remember I had to buy some crowsfoot wrenches.

Brian Carlton · #5 10-25-2004, 09:28 PM

Well, I did not have any crow's foot wrenches when I did the SD. And, you would normally be correct, in that you can't do the job without them.

However, on the SD there is a hose nipple to the immediate right of the pump. Disconnect the hose (from the tank IIRC), and remove the hose nipple with a standard wrench. Then, with the hose nipple out of the way, you can now get a standard wrench on the flats of the pump.

No crow's foot required.

This is on the 126 with the 617. The 115 may be different.

Palangi · #6 10-25-2004, 09:42 PM

There's a picture of a 115 240D pump posted on here somewhere, but God knows where. I will poke around and see if I can find it.

psfred · #7 10-25-2004, 09:46 PM

Crowfoot is required on the W115, no room down there AT ALL for open end wrenches, the suspension is in the way.

I'm gonna swap mine while the engine is out, much easier.

Peter

NC240D76 · #8 10-25-2004, 09:53 PM

Thanks for the help.

I did get the replacement pump from Phil but no instructions.

I just ran out to the car and I can see hex grooves on the bottom of the barrel that the pump sits in, aprox two inches below the black top and squeezed between the injection pump on one side and two metal tubes/hoses on the other making a triangle around the grooves.
Oh Man, if a crowsfoot wench will get in there it must be a sort of miracle tool, any suggestions where to get a set?

Palangi
How does the 240d work with a 5 speed?

hockeynut · #9 10-25-2004, 11:13 PM

You should have received a new copper washer with it as well. Did mine last month - easy and very nice priming compared to the old style - no leaking while pumping. Got away with an adjustable wrench on my 123 with 617

Ken300D · #10 10-26-2004, 08:27 AM

I used a basin wrench to grab the pipe part of the old primer pump on the 300SD. Then I was able to use a regular wrench to get the new pump tight.

In your case you should probably be able to get the old pump off with the basin wrench - not sure how you'd get the new one tight though. And I am assuming the primer pump design is the same on yours as mine.

Ken300D

Pete Burton · #11 10-26-2004, 08:50 AM

yep, I got mine off with a small vise grip wrench and the new one on with a standard wrench without removing anything else. It REALLY looked like I couldn't but of course I tried it anyway. Taking the old one out should be easy, you shouldn,t care if you damage it a little

The new one only needs about 1/4 turn or something like that. A crowsfoot is nice I hear, I've never had one, but I've heard that the crow doesn't like it very much.

SD Blue · #12 10-26-2004, 09:37 AM

In cases such as this, I purchase one of those cheap wrench sets from Harbor Freight and make a crowsfoot wrench that will work. They are cheap enough to modify and keep for other once-in-five year uses.

NC240D76 · #13 10-27-2004, 11:42 PM

Thanks for the help.

I think I will use the vise grip to remove the old one and just have to buy one crows foot but it doesn't look like there is any extra room on this one so it might just bend a wench and see if that will work better.

boneheaddoctor · #14 10-28-2004, 08:59 AM

I used channel locks to get old one off and a wrench to put it on, not a big issue. Quite simple. Be careful to not drop the sealing crush washer.

Pete Burton · #15 10-28-2004, 10:14 AM

Quote:

I think I will use the vise grip to remove the old one and just have to buy one crows foot but it doesn't look like there is any extra room on this one so it might just bend a wench and see if that will work better.

I like to do that too. Just make sure she's willing first