The adjusting bolt you are pointing at on your pump just hits arm #2 that controls the metering valve #4 (both in first pic). If any pump repair shop is using this to set the total horse power on an injestion pump then they are doing a poor rigged up job. This is to set the torque response of the pump. It will not give you more total fuel delivery unless someone has set the injection pump wrong internally.
To correctly adjust the maximum fuel delivery you need to tighten bolt( second picture) #12. That spreads the retaining clamp #13 open. This lets the pistons #11 travel out into the cam ring further. This gets you a higher maximum fuel delivery.
The adjustment bolt you are pointing at does not change the maximum fuel delivery. It just changes when the pump will allow the maximum fuel delivery. You will not gain much horse power and you will make it smoke like a freight train.
I have set them on a dynometer where you can actually see the horse power not just guess because it is smoking more.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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