12V voltage regulator output. What is normal? Edit: I goofed!

[Mart]

Edit: Sorry for the hullabaloo but I just discovered the problem. It was my fault. See my post lower in the thread.

Hello. I just fitted a new Voltage regulator to my truck, and I am a little concerned at the numbers I am seeing.

It is a brand new, made in the USA unit. The typical type with the blue lid.

With the truck at about 40 mph the ammeter is pegged positive and the max voltage reading I saw was 17.6 volts.

I'd say that is much too high and would be at a level where I would start blowing lights or other components.

I fitted this unit because the old one (also relatively new) is under charging.

So I wondered what other peoples experiences are with these units.

Is it reasonable to expect me to try tweaking a brand new unit?

Is there an alternative unit that is more reliable, that is compatible with a Ford type generator?

I looked at a VW beetle unit but came to conclusion the field wires are wired the other way so it would not work with The Ford generator.

I was hoping to see just over 14V and a steadily reducing ammeter reading. Is that unreasonable?

Thanks. Mart.

Here's the unit. A Standard VR21.