Rickcher

I have just acquired a Beede 3500 rpm tach that was installed in a White truck with a Cummins 6B motor. The company claims that the sending unit is obsolete and no longer available. We replaced the tach (the sending unit was bad) so now I'm trying to figure out how to get this thing to work on my truck. Is there a way to hook it up without using Dakota Digital's overpriced box? Can you get just a generic sending unit? Where would you connect it? Thanks in advance.

Jim Lane

Where was the tachometer generator on the original 6BT? was it on the timing cover riding the nut of the injection pump or on the bellhousing cover counting the flywheel teeth?

Jim

Rickcher

It was on the bellhousing cover.

Rickcher

Any ideas, Jim? There's a switch on the back with 4 positions, and there's a label that reads: 1-5658hz
2-6300hz
3-8050hz
4-9275hz
Don't know if this helps or not.

Jim Lane

The 4 position switch on the back is to adjust the tachometer to how many teeth are on the flywheel, the 4 selections

1-5658hz
2-6300hz
3-8050hz
4-9275hz

will select the correct frequency for the tachometer to read full deflection at 3500-RPM.

I would ask the tech at Beede but as far as I know the pickup is just a Hall-Effect switch and all give a pulse when in proximity to a gear tooth, the only thing critical is its mounting distance and squareness to the flywheel ring gear.

This might sound all complicated and intimidating but it is not.

You need to check your tachometer and see if you can find any part numbers on it, then give Beede a call.

http://www.beede.com/xSupport.php

Once you find which model you have you can check here and download the installation sheet for it.

http://users.boardnation.com/~Beede/...lay;threadid=6

Here is more information about the operation of the system.

http://www.beede.com/TS-Tach.htm

Quote:
2.The magnetic sensor tachometer is hooked up to a hall-effect sensor that counts gear teeth as they pass by the sensor. Both wires from the sensor are routed to the tachometer as a twisted pair. One wire is connected to the signal input and the other to the ground terminal on the back of the tachometer. The ranging switch code for the amount of teeth on the wheel can be found in your tachometer’s installation instructions.

Here is the home page for Beede Instruments.

http://www.beede.com/index.php

Hope this helps.
Jim

Rickcher

Wow! Some great information. I'm going to give them a call tomorrow and see if they can help at all. When our mechanic at work called them, they told him the sending unit was no longer available and left it at that. Maybe they can go a little deeper with it. Thanks again, Jim.