Search results

What General said, wouldn't really effect freq, just suppress/average the signal amp;itude(turn AC into DC). Way back when, it was common to pull the tachometer signal from the alternator, but those signal points were designed for that. As mentioned, Neihoff intended this output for a specific...

The A1 has a 100A alt and LBCD. They didnt typically fit the 260A untill the A1R. In his case he has one of the "Tween" trucks. 3126 engine, but no external switches or battery disconnects. Has the newer circuit board power dist panel and 100A alt(AC signal and LEDs) but no LBCD. I call...

Well its a brushless alt so it gets its excitation in pulses, which means the alt rotor is physically loaded in pulses. At low electrical load, and perhaps depending on how tight the belt is, this might cause fluctuations in alt RPM compared to actual engine RPM and these are reflected in the...

Ok, it sounds like you have what I call an A0.5… it has a 3126 engine and the A1 circuit board power panel, but the basic DC power wiring is the same as the A0. I suspect you have a simple polarity protection box back inboard of the spare(has only 4 large terminal studs and no other...

LBCD Load and Battery Control Device. Its located back between the spare tire and the air filter. It has 4 large terminals, a cannon plug for other signal wires(like the AC input) and a status LED. Without the AC input from the regulator it will not function as intended. If you have dropped...

exactly, its a Neihoff signal…

On the earlier alts used on the A0 it WAS a field load output(labeled F-) to the Standardized Test Equipment (STE) plug To gauge alt load. later when they added the LBCD they reconfigured the regulator and re-named that terminal to “AC”. The LBCD bases its actions on alternator RPM. Below a...

There is an excite terminal and an AC terminal on the alternator regulator. But this signal is used by the LBCD For its operation. Not sure if it is even in a format that would properly drive an AC or alternator tach, it was designed to feed the LBCD, both components built be C.E.Neihoff… in...

The A1 crank sensor is an ECU sensor. The tach signal/RPM data is on the J1939 bus on the A1… I don’t think you can use the tach AC signal as the LBCD uses that signal… Are you trying to add a tach? Google “J1939 tach”