I just had to replace #5 injector line due to it breaking of at the head. Something that surprised me is that it would appear that the injector line appears to to be double walled with a very small line inside of the outer line separated by what appears to be nylon. I don't know that be an absolute fact but this is what I see from the damaged parts. Here is a pic of the knob that broke off at the head.

I have not been able to cut the old line open to see.  Is the entire line of this same construction? If so that would explain why I could not fold the line over to crimp it off. I will cut the old line open tomorrow and see what is there.

I would never plug off a injection line. Being the pump is capable of seriously high pressures 18k or 20k PSI once it dead headed the line something is going to fail. I figure the rotor plate will give first being its the weakest link in the pump.

 

The rotor plate is seen here at the head of the main shaft. This plate rides in the 3 grooves where the rollers and shoes go.

 

The two stubs on the top of the rotor shaft is what fits into that plate. 

This brings another question, by raising pop pressure does it reduce life of vp

8 minutes ago, Dieselfuture said:

This brings another question, by raising pop pressure does it reduce life of vp

 

I doubt it.

 

 

4,250 to 4750 PSI or 293 to 327 is considered allowed for pop pressure.

 

Now remember the duration of the injection event is based on how high the line pressure rises. I'm not for certain but I've heard VP44 can make 20k PSI or somewhere close to that.