I want to preface this post by saying that there is probably no good reason to take apart an oil injector pump, but if it is absolutely necessary, here is some additional information:
1. After removing the oil cable cam and the end plates, the first part that must be removed is the input shaft. This is a simple, but difficult process. Essentially the shaft has to be pulled out - straight out, and likely it will not want to come. There is a seal on this shaft. The seal does not need to be removed to remove the shaft. But with that said, if the shaft is not pulled straight out, the shaft, the housing, or the seal can be damaged.
2. After the input shaft is removed the oil pump cam shaft can be removed. There is a spring clip inside the housing that has to be pulled off. The spring clip holds the cam inside of the housing. In the photo the cam shaft is shown partially pulled out and with the spring clip re-installed so that it would not get lost. This cam comes out fairly easily. Although some pressure may need to be applied to the head of the pump barrel to allow the cam shaft to slide past.
3. Once those parts are out, the pump barrel can be removed. Note in the third photo there are two parallel grooves running part way along the length of the barrel. These grooves were caused because I did not remove the input shaft before removing the barrel and the teeth of the worm gear on the input shaft scored the outside of the barrel as it was pulled out.
Again, the other thing seen here is that the barrel is scored around its circumference at the oil outlet. Some debris must have been lodged in the port which wore a grove in the barrel. This groove allowed the pump to leak excess oil into the engine causing excess smoke and abnormally high - and quite noticeable oil consumption.