John Deere 2010 timing issue-help!

Hello, I am working on a 1964 or 1965 John deere 2010 Diesel (serial number tag is missing). I have no history on it. The roosamaster injection pump (DBGVC429---2DH) was not tightened down-so assumed timing was lost or incorrect anyways, and took the pump off to replace all of the seals. I carefully replaced all of the seals in the injection pump, and went to install the pump and set the timing, (#1 at TDC of compression, D/C mark aligned with bell housing) but found that the timing marks on the pump were impossible to align with the limited travel of the pump housing to engine block with the 2 pump housing bolts loosely installed-timing marks on pump are off by just a few degrees with maximum travel of pump housing relative to engine block. I figured that someone may have installed the oil pump gear 1 tooth off; so I removed the oil pump, and installed again 1 tooth off, but I was even further off in aligning the timing marks the other way-this was not the issue. I took a closer look at the injection pump-and nothing is clear to me as to how I could have re-assembled the pump allowing for only a few degrees off (could have installed 180 degrees off, but not just a few degrees?). I"m a little concerned that someone may have installed the cam to crankshaft a few degrees off-but couldn't see any witness marks on cam or cranshaft gears to confirm. Does anyone have any ideas on what could be going on, and what to check next?

First off, it needs to be determined if the timing mark on the governor weight carrier in the IP is correct. If the part has been replaced, there's a procedure to mark it correctly, or it's even possible that, at some time in the past, the ring has been swapped out for one from another pump.
Info on mark

hello Bob, thanks for the reply. Do you know where I can find the procedure to check and mark the governor weight retaining ring-or will this need a calibration test stand, in which case I would send the pump out. Thanks for your thoughts

Jared

You can air-time the pump and get it installed correctly regardless of where the timing-mark is on the pump. You need to rig up a fitting so you can hook compressed air to the #1 injector-port on the injector-pump head. They turn the engine over coming towards TDC until you here the plungers slam out inside the pump. It is a common routine to time a pump when the marks are missing or in question.

Air-timing is the easy way to check it and time it. If you really want to take the pump off and apart again -the timing mark is supposed to be at 48.5 degrees on your pump.

This is extremely helpful! i pulled the pump and it is apart, so I can easily measure the mark on the weight retainer first, and then air time later if unsuccessful or to double check. It is a little tough to see in your cartoon, the 48.5 degrees is measured relative to what?

Stanadyne has a tool for it and it costs $80 if you buy in the right place and $200 if you buy in the wrong place.

As I recall, and it has been a while, it can be done on a sheet of paper with a 360 degree wheel drawn on it. Here is the plate with a timing mark from a three-cylinder John Deere. The mark is set at 184 degrees. That is the distance, in degrees from the factory reference mark "1L." Your plate will also have a reference mark but it might be some other letter/number combo.

I laid down two pens showing approx where the 48.5 degree mark (from either direction) for a 2010 ought to be IF my memory is correct. See if you have a mark that comes close.

thanks so much for this information! I was able to make a template and found that the initial timing mark was a few degrees off from the 48.5 that you specified. I scribed a new mark, and will now clean and reassemble the pump and hopefully this will be the end of my timing issues. I'll let you know how it works out, but may take a few days, weeks.

Thanks again for taking the time

Jared