I'm in the process of replacing injection pump, I purchased a used one from a '84 300 SD but it has an electrical connection on the inside front , facing the engine, that my original pump does not have, this is a wire with plug, anyone know what this is for & if
I can use this pump without connecting that wire?

Yes, will work fine. That cable is for the "rack position sensor", which is part of the emissions controls (1984-85). The only downside is that the sensor makes it harder to get a socket wrench on one of the IP mounting bolts.

I think it might also be used to turn off the AC compressor under hard acceleration via the Klima relay box (you don't have). I went the other way, installing an earlier engine in my 1985 CA 300D.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

thought I'd be OK but reassuring to get info from you, could that be removed to make getting to the mounting bolt easier?

I replaced original pump 8 years ago with an earlier one that did not have slot for timing tool, so I timed it with drip method, now replacing with this later one do I need to buy the locking pin or can I do it again by drip method, anyone with tool willing to lend me?

I haven`t read the Rack Position Sensor has anything to with the Klima or the AC.

The RPS send a signal to the Black Box in the 84/85 pass side kick panel.
It is for the EGR operation.

It can be eliminated and the Pump will work just fine.

The Pump you have for the 84/85 has a port on the side for the RIV timing tool.
yes you can still use the drip method to time the engine.

http://www.peachparts.com/shopforum/diesel-discussion/268726-riv-timing-tool-purchase.html


Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

I decided to get the RIV tool & time the way this IP was designed to be timed instead of using the drip method. When I installed the early type IP that didn't have the port for timing I advanced the timing by moving the IP shaft but as I'm now using an IP with the slot I don't believe I can do that so do I set engine at 14% ATDC or 16% ATDC to compensate for timing chain stretch instead of the specified 15%?

increasing the degrees 'before top dead center' makes the injection earlier.

Decreasing the degrees After top dead center will accomplish the same.

14 deg ATDC will make injection earlier or compensate for chain wear.


Where did you get your RIV tool?

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El Paso Tool on ebay. $30.34 delivered

$30.34 for the tool? That is an unbelievable price. They were around 3 - $400 range last time I checked.

Did a Google search and this site has them for $695.

https://www.toolsource.com/mercedes-benz-tools-c-1321_831_846/diesel-timing-tool-static-mercedes-benz-p-150872.html

Does your look like this?



Couple of interesting threads on the RIV tool.





http://www.peachparts.com/shopforum/diesel-discussion/268726-riv-timing-tool-purchase.html

http://www.peachparts.com/shopforum/diesel-discussion/139170-specialized-indicator-ip-timing.html


Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

I couldn't find it on ebay - how about a link?

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

What I purchased & used successfully was just a mechanical pin, not an electronic tool, worked fine & car runs great:

Mercedes Diesel Engine Injection Pump Pin Timing Tool | eBay

Cool thanks for the link

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!