72 220d ip pump oil
 

on my ip there is a red cap with oil written on it.i know from reading previous posts that oil is added to ip,but im not clear how much and what kind.previous posts spoke of techniques to measure oil level -wasnt very clear.anyone have clear info how to check,fill oil and what kind.should this oil be drained as a maintenance item-how?

If you have the owner's manual look at the instructions and check out the pic. drain plug on side of IP, filler on top.

Drain all oil, even get as much of stuff out with a turkey baster, because probably no one has cleaned it. Use a big cup to catch the old oil, look at it and measure qty. Then close up the side drain.

Then SLOWLY add good diesel engine oil from the top. When you have added the amount you ldrained out, add maybe half a Dixie cup more- a feew ounces. Good for another year. USE GOOD OIL!!

The owners manual will say to use the same Oil that you use in the Engine. But, at that time Disesls mostly used single vescosity oil in normal temps. Like 30wt oil, not 10-30 and so on.
Some of the IP have a small Tube with a small Banjo Bolt that comes out of the side of the pump. If you put too much Oil in the excess comes out of that tube.

Others may have another little plug up higher than the drain plug. You remove the higher plug and and fill the IP with Oil until it dribbles out of the higher hole; and install the plug.

You need to check the Oil level ever 6 months or so as in all IP a little bit of Diesel Fuel gets by the Elements (Plunger and Barrels in the IP) as the Diesel Fuel lubricates them.
This can get into the IP Oil and dilute it (another reason to use thicker Oil to begin with).

You will know if your everytime you check your IP oil level is above the fill hole or in the case of the IP with the tubing if you have perodic Oil dripping from the end of the tube.

for a '71 220D
 

Hi, on my 220D, there is no drain plug. The plug on the side is for checking the level of oil. Open it and if oil comes out, there's too much. (diesel does leak in)

To change the oil, first I removed the side plug and let that excess oil/diesel out. Then I used a straw sized, flexible tube with suction bulb to pull all oil out by inserting the tube into the oil fill hole. It takes a few times to get it all, as there's mechanical "stuff" in the way to the bottom of the sump. Then I added oil until it started to overflow from side hole. I reinstalled the side hole plug and the oil filler cap and marked it in my log book.

The old oil was quite like diesel.

Ron

On the 1975 240D there was a kind of a dipstick attached to that cap. And, there was an overflow tube. If you put too much in, it just ran out the overflow tube. I know. That is how I found the overflow tube.

Jim

220d ip oil
 

thanks for the great info all

overflow tube
 

Jim, I think the overflow tube may have fluid leaking out if the IP is bypassing a lot of diesel. On my '71, I don't think the original owner ever checked the oil in the pump in his 103K miles with the car, and the level was high enough to flow out of the tube. Now with proper oil level, and real oil, the tube has been dry, and that was the last leak on my engine. No more spots on the driveway! The IP does not add much diesel to the oil, but over years, it builds up a high level and then overflows, i'm guessing.

Ron

A good IP does not leak much Diesel into the Oil but one with a lot of hours on it and is worn or one that has had some dirt through it and gotton the Plungers and Barrels/ Elements scored can cause a differance in 3-6 months.
You need to learn the characteristics of your own IP.
Another area that can leak Diesel into the IP is the Fuel Supply Pump.
There is a tiny O-ring that seals the push rod in it. It is inside of the push rod hole not on the rod.

I e-mailed to a German mechanic from Germany about this through a forum in Germany.

His suggestion: check the manual for the volume of oil in the IP.
Make sure the overflow side plug is closed.
Pour that amount of HD30 into the IP from the top.
Wait 24 hours, at least an hour min
Open the side overflow valve and collect the rest.

The older oil, being lighter than the new thick heavy oil, will be displaced and end up above the overflow line.
You just gotta give it time.
I asked him what he does on his 190D- 60 vintage.
He waits overnight, then opens the drain plug after he puts a bowl below, smokes a cigarette, lets the oil flow, closes the plug, gets rid of the old oil.


ganz einfach, ja?:)

I think I liked the sucking out with a tube idea better. You could use some of that skinney hard plastic vacuum line with a short piece of rubber hose connected to one of those cheap plastic Syringes they use to inject Meat. We have 99cent stores out here that sell them.
That would get the bulk of it out.
After that you could use the "German" method above and end up with cleaner Oil.
Also a thought is that the drain plug could be on the opposite side of the IP.