Will an electronic tachometer from M35A3 with 3116 work on an FMTV with 3116?

[juha_teuvonnen]

My truck is an M1083A0, with 3116. I would expect the tachometer from M35A3 to work, since both trucks have the same engine (Cat 3116), just at a different power setting. I am wondering if anybody here was able to make it work?

 

[Ronmar]

Where does the tach signal originate on the M35A3?

 

[juha_teuvonnen]

Where does the tach signal originate on the M35A3?

Nor sure why they called it "cable" it seems to be some kind of a sending unit, probably Hall effect or VR sensor. I believe it's this sensor, but I don't own an M35A3:

Tachometer Cable Sensor M35A3

Tachometer Cable Sensor M35A3

www.easternsurplus.net

 

[Ronmar]

If it is the standard inductive pickup used on the 3116, then it will
Probably work ok…

 

[juha_teuvonnen]

The FMTV gages are weird. The lighting on them is 12 volt, but the gage itself is 24. Not sure if the M35a3 is the same or not.

 

[Ronmar]

The FMTV gages are weird. The lighting on them is 12 volt, but the gage itself is 24. Not sure if the M35a3 is the same or not.

Yes the LMTV gauges are weird. In the case of the tach sensor used by the 3116 though, it probably would not matter as the sensor is self powered/generates the signal pulses internally.

You would have to find 12v to power a 12v gauge. Not sure what the M35 uses for gauge power. The A0 does not have switched 12v ignition, which makes it a little more difficult. I converted the work light relay on mine to provide switched 12. Its real easy,I did a video on it over on my youtube channel, user name Rronmar…

 

[juha_teuvonnen]

Yes the LMTV gauges are weird. In the case of the tach sensor used by the 3116 though, it probably would not matter as the sensor is self powered/generates the signal pulses internally.

You would have to find 12v to power a 12v gauge. Not sure what the M35 uses for gauge power. The A0 does not have switched 12v ignition, which makes it a little more difficult. I converted the work light relay on mine to provide switched 12. Its real easy,I did a video on it over on my youtube channel, user name Rronmar…

Thanks for posting that video, it's very educative and useful. I really appreciate the knowledge sharing. I will need 12 volt switched anyway, for various pieces of equipment, like back-up camera, Audio system, GPS, phone charger and so on.

 

[coachgeo]

Thanks for posting that video, it's very educative and useful. I really appreciate the knowledge sharing. I will need 12 volt switched anyway, for various pieces of equipment, like back-up camera, Audio system, GPS, phone charger and so on.

some of those may be 12v/24v...... look close....... more you put on the 24v circuit the better.

 

[juha_teuvonnen]

some of those may be 12v/24v...... look close....... more you put on the 24v circuit the better.

Excellent suggestion. If I am buying some brand new items, might as well look for the 24 volt.