Anyone know about the guide stud at injection pump?

[als804]

Anyone know about guide stud at injector pump(DB2)?
I removed the guide stud for adjusting fuelthen reinstalled it correctly.
But no start after it.

I guess the guide stud is overly or weakly tightened
How much do I tightenthe guide stud ?
If i loosen it, fueling will be lowered?

 

[als804]

I found out the cause it was metering spring. I had not installed it correctly. After reinstall it fires up nicely