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I understand. We posted this here because at first we weren't sure if we had missed a circuit in the IAH system. Maintaining the fuel and oil systems with frequent filter changes and fluid replacement is critical to staying ahead of potential issues. When we owned a number of big yellow...

24, almost 25,000–

This morning we took her for another run. 46ºF morning looking for the IAH to cycle on and off after startup. Then to merge up to speed on the interstate. Remember we have EcoHubs and have yet to reprogram the speedometer. video of start up and merging on to interstate updated link to...

So, you have CAT ET software?

I have been wanting to add CAT ET to the mix and learn more about all the bits and pieces in that diagnostic kit you and @Lostchain suggested we pickup—

Well, this morning similar temperatures, new primary and secondary she fired right up smooth. After swapping filters video Hopefully we won't follow behind @ckouba too quickly. Though our rough idle had a different pattern and feel from his from watching his video. Still back to this thread...

Yes, all new fuel lines. Hand pump stays hard. I recently ran the tank low, hopefully just picked up some silt from it. I should likely drain the tank and clean it out—

I picked up primary and secondary yesterday. I'll drop those in today and see if that works—

We have a few miles on her since pulling out the LBCD and disconnect relays. Everything seems to work except the Inlet Air Heater (IAH). At start up the dash light cycles on and I can hear the solenoid cycle off along with the dash light. Though once started the IAH does not cycle back on...

You all are way ahead of us. We didn't use the the canon connections; we used the eyelets with 2 flat washers with a lock washer in the gel and plastic. In modding like this everything we do is a lab test—

Free shipping to our local home depot. Didn't use the bus connection in the odd chance we have to go back. Added the wire ties as insurance. I think they were about $25 each, hopefully they will hold up well—

Removed the LBCD; removed the remote battery disconnect relays; reused the existing wires to directly connect batteries to the alternator and manual disconnect to X1 at PDP and starter. Used gel connections to replace the connections at the LBCD location, Next step: install the 24v AC...

The other location we measured was the distance the pulley was off the mount, perpendicular, to keep the belt tension similar. That made the cutout for the rear ear angled more deeply into the mount than I expected—

You could add a 7/8" grade 8 split ring washer to add a small gap between fan plate and pulley? Before we pulled the mount off we measured the distance from the front mount edge where the forward lower ear sits against it to the alignment of the serpentine belt. Then as a double check we...

Right, the battery disconnect relays on the A1 trucks is next to the manual disconnect. The wiring to the alternator runs from relays to LBCD to alternator. @Ronmar is who pointed out if removing the LBCD, then the battery disconnect relays needed to go as well. The batteries become the load...

I saw your CAT alternator has a 7/8" shaft, like our Prestolite unit. We used the alternatorparts.com part #247750 - Pulley, 8-Groove Serpentine, For Delco Alternators. That pulley does have a key way, though reading through their help section and 8 groove serpentine page it appeared to be our...

We were able finish up installing the new 24v 200a alternator; removed the 3-12v lines: from batteries to manual disconnect, remote battery disconnect relays to LBCD, LBCD to alternator; reattached the 24v lines at the LBCD all to 24v bat, nothing attached to the other three leads, though left...

The particular pulley depends upon the size of the alternator shaft and retention method: key, locking bolt, friction; matching the belt size and outer diameter, (assuming the new alternator requires the same rpm range to operate). We have a serpentine 8 groove belt, with a ~3" od pulley. Our...

Pulley arrived yesterday. Today we modified the mount and made an upper bracket. [edit: added a 1-1/8" spacer to fill the gap behind the forward eye. You can see it painted yellow below in post 27] Tomorrow we'll reinstall the modified mount and new bracket, pull the LBCD and remote...

We received a 24v 200a alternator and if I wasn't so busy working the dual voltage one would be out and bracket mods begun. I am wondering if the alternator shaft sizes will match, though am expecting I'll need another serpentine belt pulley for the new alternator before we can complete the...