Injection Pump Repair

[Bear]

Does anyone have a recommendation for a source capable of checking and or rebuilding an injection pump for an early 68 280 SL.  Mines been sitting since 1980.  I'm in Seattle so West Coast would be nice but a good port in the storm is appreciated.

[enochbell]

Gus Pfister at Pacific Fuel Injection in S. San Francisco is probably the most capable and expert service expert in the U.S.

Best,
g

[Tomnistuff]

There is also Jerry Fairchild Industries, North of San Francisco, not far from Redding.
They did mine, but I haven't installed it yet, so no personal experience.

Tom Kizer

[66andBlue]

Welcome Bear!
Is the engine running? Don't start with having the IP repaired before you really know that it needs repair.
Most of the time they are still OK. If it is only sticking and needs cleaning then Fairchild is OK because he charges about 50% of what a full restroration costs with Gus.

[Pinder]

Pump may be good and just needs some cleaning to free up the pistons. 

[ctaylor738]

You can lay the pump on its side, remove the cover plate, fill the cavity with ATF, and let it soak for a couple of days.  Then turn the pump and see if the little pistons move.  Keep soaking and turning until all of them move.  Then turn the pump with a drill and see if you get ATF out of the nozzles. 

If this goes OK, use an (8 mm?) screw to move the rack back and forth.  Then disassemble the Won't Run Device aka Warm Running Device and make sure the air slide moves freely, and test the thermostat in hot water. 

If all this checks out, your pump is probably good to go.


Robert Fairchild checked and adjusted a pump for me, and also spent a lot of time with me on the phone helping me troubleshoot a car that had a hesitation at take-off.  Good guy.  Gus is one size fits all - send me the pump and I'll rebuild it.

[Bonnyboy]

I'll vouch for Fairchild - I called him up preparing to send him an injection pump because car sat for so long and instead he said to check a few items first.  They all checked out and my car started right up.  His argument for the free advice was that he's busy enough fixing nackered pumps so he didn't need to take time fixing good ones.   Very nice guy.

I have since collected 2 injection pumps so that when I need to send down mine, they can be used as cores to reduce the cost of a rebuild on mine if it ever comes to that.   In the meantime they make real cool decorations sitting next to a big Stromberg carb, couple old pendulum clocks, an industrial 2 cup Hotel type silver tea pot and a French horn.

[Mqueretin]

Hi There,

For future references, in case someone needs an overhaul of his injection pump: I made a search when I had my two pistons for cyinder 1 and 4  blocked a few months ago for which I received great help from this forum. I contacted MB's classic center in Stuttgart and they reverted me to Bosch (www.koller.de). The contact details are below:

Koller + Schwemmer GmbH
Röthensteig 21
D-90408 Nürnberg
Germany

Tel: +49 911 36103-0
Fax: +49 911 36103-103

I was in contact with a very helpful person who can be reached at the following email: hermann.sattelberger@de.bosch.com. He can speak English.

hope this helps.

Cheers. Marc

[rigger29]

You could try this - Jeff at TMC Publications.  Funnily enough I've just been talking to him about engine rebuild manuals and he said he had the manual for the "6 plunger fuel injection pump" which is apparently what we have.  It gives all the instructions and setting for the Fuel injection.

You can get hold of him on 410-526-4495.  He's a nice, helpful and knowledgeable guy.

Cheers........Mark

[Benz Dr.]

You could try this - Jeff at TMC Publications.  Funnily enough I've just been talking to him about engine rebuild manuals and he said he had the manual for the "6 plunger fuel injection pump" which is apparently what we have.  It gives all the instructions and setting for the Fuel injection.

You can get hold of him on 410-526-4495.  He's a nice, helpful and knowledgeable guy.

Cheers........Mark

This is not something you can do at home. Instructions are great but you need special tools, the rebuild parts, and more than anything else, the skills to be able to do it. Then you need some way to calibrate your pump.  Get something, anything wrong, and you will be doing what you should have done in the first place; sending out for a rebuild.


You can do external adjustments like setting the idle mixture, mid and high range adjustments, freeing up stuck pistons, and changing the shims under the BA to adjust the whole range. Our pumps are VERY sensitive to even small adjustments..

None of these things are easy or simple to do, and if you've never done it before, it's hard enough at times even if you have.   

[Bear]

Thanks for all the help I'll give it a try.
Just waiting for feedback on the block - apparently more issues with the sleeves and crank than I expected.
should know more by Monday.
Thanks again.