CAV pump timing

Spangsberg

New User
Hi All

I hope you guys are able to assist me in getting my '71 Ford 4000 3 cyl diesel running smoothly....

It all started with the core plug behind the CAV diesel pump leaking, and I thought that while I had the pump off the tractor anyway, I might as well do a reseal of the pump, as the tractor has a hard time starting while cold. (Injectors replaced earlier)

I took a photo of the timing marks, and didn't study it closer before I pulled the pump.

As I began opening the pump, it was soon evident that I was not the first person there, and that the one before me either didn't know what he was doing or i a real hurry....

Among other things, the cir clip in the middle of the pump was just thrown back in there, with no respect to previous placement, so I didn't have any edges to align anything after.

I replaced the seals and reassembled the pump, and when I got to putting the pump back on the tractor, I noticed that someone had added additional marks on the pump and timing housing, but in my photo I saw that these marks were around 3 degrees misaligned (Clockwise) I thought to myself that with the clown that worked on the pump previously, I would install the pump with these marks aligned, which is very close to factory 0. I have no idea if it the original pump.

After refitting, the tractor still puffs a lot of white smoke and takes 20-30 seconds on the starter before it fires, although it seems to run a little better now



Now, how do I ensure proper alignment of the pump timing?
 
By trial and error, Try other settings and see if it helps or not. The circlip inside the pump on Ford engines was NEVER used for timing internally like other engine builders, and even some of those stopped using it too on the spec sheets. White smoke, hard starting may also be engine wear issues too. White smoke means pump/injectors are getting fuel in the chamber, but compression heat is too low to burn the fuel..
 

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