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I have that same alternator, mine has a ripple of about .5v at idle. Since it is not a hard failure the niehoff manual does not have a clear troubleshooting step. Did your voltage gauge have a flutter before the alternator died?

Do you know the hose manufacturer? They should have a minimum bend radius. looks like for a Parker 426 hose a -6 hose Bend radius is about 5”. Bend radius can be different depending on working pressure. What is the line pressure...

I have a 1078A1 3126, I like the ABS system, it works well and seems to keep the tyres from locking. I live in Alaska when I first got my truck from auction it had a few ABS issues, I had to readjust a wheel speed sensor and have my ABS ECU to reconfigure. After that it works great, I did a...

i use the UH2-5. It has a set screw to position the contacts, it is very nice when you are working with a bunch of different pin sizes, the problem is it is easy to not position them right and get a badcrimp.

I like the deutch connectors. The barrel crimps are superior in my option to the weather pack fold over tabs. The barrel 4 crimp is what is commonly used in aviation circular cannon plugs. The style crimp tool I use is the AF8 with the universal positioner.

Pn 405048 6- And 9-Pin Y Deutsch... https://www.amazon.com/dp/B00F06SV3M?ref=ppx_pop_mob_ap_share this is the one I use for my prolink 9000

My option panel has a CTIS on/off switch, is it for that?

In the aircraft world we use F4 tape or silicone fusion tape works well. My favorite is red high temp. When we pot connectors we mostly do it on bonding straps. It needs a special potting material that does not cause corrosion. I typically don’t like potting because it is hard to remove if you...

I wish it was mine. It was the one I learned on so it is forever stuck in my mind. I have been having issues with my electrical system I cleaned all my major connections alt connections, block ground, pdp points, diode block connections, checked for shorts and rotated my batteries. I am having...

I am not sure about max draw, I have a 3126 with a 100 amp alt. The only time it is maxed is when the grid heater is on. It drags down the alt to max output. Voltages go down to 22 when the grid heater cycles. Grid heater has a 100 amp fuse so it should not be more than that. my friend was a...

I have installed remote start systems for automotive gas cars. I would assume the principle remains the same. A remote start module controls the start sequence. Most start systems use alternator voltage to detect a start. Other systems use an output such tach to determine a start. I think most...

i need to correct myself the serial comm is not from the keypad but to the diagnostic connector. You might have to check your termination resistors for your 1587 and your 1939 data bus

it seems like to me you need to find out where the comms are being lost. Allison ecu to key pad or CAT ecu to Allison ecu You can check the serial connection from the keypad to the Allison ECU. Disconnect keypad and Allison ecu ohm out the wires from A to black S1, and B to black s17. good luck

There is a designed system the sort of acts like you are describing. The WABCO ECUs on the A1s can be programmed to use active traction control. After I got my truck I could not get my ABS light to go off, I got a code reader and found that my WABCO ecu was looking for an ATC valve and would...

The 3126 and C7 have an input for service brakes, per the wiring diagram the input to service brakes is hard wired to the sensor common. You can do a wiring check from pin 5 on your ECM p2 connector to 45 to see if you have continuity.

The adapter plate in the bell housing is different. Digital throttle, 1939 data bus wiring. I think the physical install would be the easiest part. Hard part is redoing the wiring. was the 3126 from another FMTV?

Looks like an ABS ECU, they are WABCO ECUs. ABS works well, they usually don’t fault and when they do it is usually the sensor starts to wander from the tone ring, all it takes is a punch and a light tap to reseat them.

It looks like an A1, no hand trottle. Also you are missing your snorkel, check for water in the aircharge before starting.

does your PDP have the printed circuit board? if you do you should have LEDs for 12V battery/Ignition.

Thanks for finding that. I have always wondered why cars are using lighter oil. My guess is most automotive industries are using lighter oils in their cars and trucks to gain higher fuel efficiency. looks like the engine and transmission oils they went down to 0w-20. It makes since since it is...