78KWguy

Another question while I'm here; If you look closely at the picture of the dash where the heater~a/c control panel is, you'll notice the fan speed switch is non-existent. Where's a good source to look for these older Mack parts, specifically a new control panel? Are they still readily available at Mack?

18 hours ago, D-Day said:

Your tachometer should be mechanical unless its been modified in some way it would be driven by a cable from the front of the engine ahead of the fuel injection pump

Ahhh...good deal D-Day. I'll start digging into it probably tomorrow. I appreciate the input!

I have an '83 MH 600 that the tach isn't working. I haven't looked into it yet, only had it home for less than 24 hours before joining this forum. Where to look first; is there a sensor on the flywheel housing like any other normal truck that drives the tach, or something else to run the tach?

Thanks in advance.

On 9/17/2021 at 7:01 AM, fastboater said:

I did a transmission swap from a Mack 5 speed to a Eaton 8LL. In doing this I’m going from a mechanical drive speedo to electric. Wanting to know if anyone has a wiring diagram for speedo to sensor. 5 wires coming from speedometer to the 2 wires on sensor .

 

thanks

 

I'm just throwing this out there...I restore vintage KW's. In two of my '78 A models, I went to a GPS driven speedometer from speedhut.com. They are fantastic in my opinion, because they don't care about component changes, tire sizes, or anything because they're satellite driven units. I LOVE them. And for around $280.00, they're less than OEM ones. Highly recommended for this exact type of deal.