I had to have my PC100 end gun rebuilt for this exact issue. They installed new drive arm bearings because it was short stroking and not driving forward. I got it like that. The Nelson dealer i go to sometimes rebuilt it for me.
4:18 The purpose of smaller orifice, is to increase velocity. While it's counter intuitive at first, the smaller hole has no depth. This means the flow rate in those nozzles are the same, it's called the venture effect.
Did the arm bearings sieze? Looks like the arm got stuck and can't drive the gun forward. Nelson sells arm rebuild kits for the SR series of guns and I heard they're not too hard to install.
I had to have my PC100 end gun rebuilt for this exact issue. They installed new drive arm bearings because it was short stroking and not driving forward. I got it like that. The Nelson dealer i go to sometimes rebuilt it for me.
4:18 The purpose of smaller orifice, is to increase velocity. While it's counter intuitive at first, the smaller hole has no depth. This means the flow rate in those nozzles are the same, it's called the venture effect.
Did the arm bearings sieze? Looks like the arm got stuck and can't drive the gun forward. Nelson sells arm rebuild kits for the SR series of guns and I heard they're not too hard to install.
Might as well replace both bearings while you have it apart.