1976 K100 Cabover project

Looking good. The staggered gauge layouts on the Kw coe’s were always neat. Still having the original stewert-werner KW tach with the old style needle is a major plus. Dont toss it even if it doesn't work because you can send it off and have it rebuilt to like new. The new tachs have needles that are lacking the style of the old ones and do not have the logo in them.
Be gentle with the fiberglass head liner too. You will never find another oe replacement. They tear pretty easy when you start pulling around on them.

 

What is the white faced gauge? Hard to make out in pic.
My guess is it may be missing either engine oil temp or the trans temp gauge in that extra hole.
Most i’ve seen had at least an engine oil temp. The main trans temp and if it had an aux. were optional and each drive axle had an optional gauge availiable.
The brake application gauge you have was optional o/o spec. Very nice to have.

It’s a preference thing. You can add what you like. I like lots of gauges. The oldtimers I knew called it the “B-17 treatment” when they special ordered as many as they could spec.

Not sure on where that expandable fastener came from. I’ve only seen them used by White and Freightliner to hold on their front radiator grilles.

 

You can get those fasteners at Freightliner dealer. So I’d think Kw should stock them as well if they used them.

 

Its the air filter restriction gauge. It Should be tapped into the filter housing or the pipe between it and the turbo somewhere. If it works correctly the higher it reads the dirtier the filter. Works off vacuum created by the intake flow. Not uncommon for the needle to rise and lower with boost.

 

There’s probably a very good chance the tach still works. The needles usually break off from a bouncy bad cable first. The majority of the time the cable breaks and it gets removed some time and never replaced. Don't know why that is other than i guess laziness or experienced guys really dont need to rely on a tach to drive. I’ve pulled a few vintage mechanical tachs and speedos outa junk yard trucks that cleaned up and worked great. All but maybe a couple still had the cables hooked to them.
You can clean up the cable drive ends with wd-40 and grease them up with a good lithium style grease like lubriplate or a graphite type grease made for the cables.

 

Lol! You said speedometer and I was thinking tach. Oh well everything I said still applies. Doh!