2020 injection pump timing

I recently put a rebuilt injectio pump on my 2020 and need to make sure it's timed correctly.

I put no. 1 cylinder on TDC, aligned up the flywheel using the timing pin, and aligned up the marks in the window on the pump. I've read that you need to install a plastic timing window to make sure the advance is correct. How do you do this unless you have some kind of timing light to strobe in the marks?

Also, who makes a tool to help with the umbrella seals?

You don't need a timing light, although it can be done if you use the diesel Piezo adapter.

If the pump was just fixed, the timing advance is supposed to be adjusted anyway.

That being said, when the engine is revved, there's no parts in that window rotating. It just moves about 1/4" at full advance. Plastic window only costs around $7.

The seal compressor used to be sold by Allis Chalmers, Oliver, Deere, Ford, etc. You now have to buy it from Stanadyne, but the job can be done without if you're careful.

Seal compressor is # 13371
Timing window is # 13366

Places like Thompsons were selling those tools at 1/2 price but much may be gone now. I bought many spares.

http://www.thompsondiesel.com/Stanadyne.htm

In my window there is a stationary mark on the pump housing and one that rotates in the pump. On TDO I have the marks aligned up, however the flywheel timing pin is not exact enough and I want to make sure it's timed dead on.

What do you see through the window? Looks like tge rotating mark could not be seen.

When you installed the pump, you lined up the two marks. One left one rotates and the right one does not.

The mark on the right never rotates. it's attached to a hydraulic piston that moves it slowly as RPMs increase (to advance timing). As I said earlier, it moves about 1/4" total. When you put a window on there, it lets you watch it without fuel spilling out all over the place.

Many tractor companies order Stanadyne pumps with no external adjustments. But Deere ordered their's with the optional external adjuster screw and jam-nut. So part of a "tune-up" involve checking that timing advance and adjusting, if needed. It's a nice feature.

The pump runs a half engine speed, so pump RPM is half of engine RPM, and pump timing degrees is half of engine timing degrees.
So, 7 degrees advance on the pump timing window is equal to 14 degrees advance if read on the engine flywheel.

When a Deere advance is not working, the engine will break up, smoke and skip when you rev it - especially when cold.

Here's a bunch of photos. DB and JDB pumps have rectangle shaped windows. CDC and CBC pumps have round windows. DB2 pumps usually have triangle shaped windows. In some of these photos I've got a JDB window stuck on a DB2 pump.

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