How To: C15a Wire-3 restoration

[Phil Waterman]

Hi Jordan

On the speedometer try loosening the cable nut on the back of the speedometer. My HUP with late style dash the speedometer doesn't like having the cable nut tight been that way since got it 40 years ago. Same problem with three different speedometers, if nut on cable is tight I think it loads the bearing on the little cup inside just enough so it rubs and makes the needle jump around. Loosening it a half to full turn seems to solve the problem.

One speedometer I had to replace spun up so hard that it rapped the needle around the limit pin.

On the thermostat did you say this was a new or old one and did we discuss exercising thermostats before installing?

Also do you have the steam relief valve open or closed? With my trucks I've found I get more accurate and quicker response from from the temperature gauge if the steam relief valve is just barely open, it helps the coolant flow up through the fittings and passed the sender.

Great work on your truck, I've really enjoyed following your progress.

Cheers Phil