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NO! The system should be completely dry. This indicates bad CTIS axle seals out in the hub between hub and spindle, allowing gear oil to be admitted to the system. Oil in the QR valves could cause them to gum up and not shift properly... A bad CTIS wheel seal should also force air into the...

A0 or A1? Whats your voltage on the gauge when running?

What superman said. The quick release valves connect between the CTIS pressure control unit(PCU) and the wheels. They also have a large port to dump air quickly from the tires. There is one for each axle. dump valves have a sliding valve core. When you supply air from CTIS it flows thru...

6 tires = 5ton...

That is an A1 schematic, this is an engine out of an A1R... The TL's in question are not on that particular schematic...

I seem to recall something about an Input power filter on the trucks with ECU’s which may be where some of these are intended to attach. Short of someone being able to provide A1R wiring info, pulling the ECM connector and using an ohm meter to find the specific ECM pin and connector that these...

Im not finding any reference to them, but I don't have any A1R info. Since it is a C7 it may have come from an A1R? Another clue might be gleaned by tracing them back to the pins they connect to on the engine ECU. I noticed they all appear to be larger gauge terminals(3mm?). That will limit...

Lot of details... My plan when the dual volt alt or reg fails is to go with a 24V alt. Get the 12V out of the battery bank and use a 24-12 power supply. I have identified a 70A unit with an adjustable output(10.5-15V) and a 13V cuttoff/dropout voltage. The beauty of this is if the power supply...

I dont think that you will be able to separate the transfer from the transmission in truck. The problem isnt the bed, it is the welded crossmember in the upper frame and the bolted one in the mainframe, right behind the transfer case. That end cover on the back of the transfer, covers the C6...

BFR or torque multiplier and appropriate sockets and extensions, Jack, jackstands, assorted wood blocks, hammer and pry bar to help break beads...

Max Where are the three cables physically located on the engine?

Well unless you get one from a reseller who actually went thru everything(has receipts for parts ect as opposed to a "looks good to me" inspection) then you get what you get from auction. Unfortunately I don't think you are going to get one that has actually been gone thru for <9K. In the end...

The Allison ECU voltage alarm points are programmed for 35V hi and 10V med-lo, 8V low, 7V ECU shutdown, but there is a note in the Allison troubleshooting manual talking about a specific 24V VIM this makes sense as the relay coils(like for the exhaust brake) are powered by switched input voltage...

CTIS is 24V...

The A0 operators manual lists curb weight as 17,770 with a note that curb weight includes 404lb of fuel and 606lb of crew... When I went to get mine licensed, they gave me a GWT transfer certificate to certify unladen weight, either scale or estimate. But since mine is a cab and...

That is what I am going to switch to when my alt packs it in...

It should work, but you need a converter with a very low cutout voltage so it doesn't drop off line when you crank the engine. They make these for commercial vehicles to provide a standalone 12V or to float the 12V center of a 24V battery string like the 24/12 alternator does. Was working...

Depending on what truck you have, some of those relays may have never been there as those features were not used on the vehicle, like the trans cooler relay not used on the 1078-1079... They spec four separate relay part numbers, you really only need two. 5 post relays will plug into and work...

Mine has valve stems and valve cores(schrader valve) installed in them and the CTIS system inflates and deflates the tires just fine... you have 3 solenoid valves on the pressure control unit(PCU) manifold behind the passenger kick plate. The control solenoid is normally open and vents the...

When nothing works, I start at the source(battery, alternator). When some things work like in your case, I pick one item and work from it backward toward the source. Often times running one down and fixing one item will fix a problem that turns out to be common to your other issues. SO, since...