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Turns out the ABS ECU was the problem. New one tested and working as it should.

Playing with thermal camera after today's test drive. Can see the heater works well :) Eco hubs are pretty much same temp as the tire as well. New(old) ABS computer arrived and works. The old one I could connect to but had some weird behavior, new one functions as it should. Tested out all...

I'm not doing that, I flip the cab a lot and pulling that seal, it's grip weakens every time. The whole reason I didn't buy a pre-done RV was because of low quality engineering. I'll make a robust and relatively quick latching mechanism that doesn't get damaged every time it's used.

Working on the design for the passthrough. Mix between engineering hours, local machine shop capabilities, keeping it KISS. Planning for door on each side, using some electrical boxes on the ends for that. Need to find a way to support the separation flange when tilting cab(where the gap is...

Answered a few posts up.

Picked up kids from school and stopped by the local park since the wanted to throw rocks at the ice. Did research doors for the passthrough, thinking of using a Hammond electrical cabinet.

So that exact air cleaner isn't listed in their PDFs, however it has the identical size filter as D100398. For a fairly close estimate, the CFM of your motor is 709 CFM. A PSD10 series can be used but I would use 2 of them for your engine output. See the highlighted items below for the...

Totally depends on size, they have many offerings. What part number do you have and also what engine/power output?

Yep, I know, just not a high priority as I'm not following conveys or in desert. It will be a very simple thing to do though.

For reference, this is part number D120037(D120339). I did look at the flow calcs and the engine recommendations from Donaldson. The filter restriction fitting also screws directly in. Not sure if I will reconnect the aux hose to exhaust... So many other things to do

Installed the new air filter. Uses factory rubber boots and intake piping. Plan to have pass through above the filter, right behind the driver.

Service or parking diaphram? I heard they changed through the years too.

Pretty sure A1 trucks have the button for injection, although likely some interlocks?

With yours, since it's not a A1R, you have a switch correct? Not sure what it will allow/not. Mine is totally ECM controlled and I have no ether button on A1R. The NAPA cylinder I got is KAT 33118, the gaskets are KAT 33119 (these are cork and not awesome). The cylinder is not opened at all...

QS4-6SS, got the last one from dpequipment.com Yes works as it should, looks identical to the one I took off.

Made 5 more and installed them today, verified clearance to inner gear of all and they were all about the same, right about 0.050". This is without any shims. The two loose wheel bearings took about 180 degrees to get to 15 ft lbs.

From an engineering perspective, many plastics would work well for this. Teflon(PTFE) is a go to for temp resistance and chemical resistance. Have to verify chemical resistance and max temp of whatever plastic used. Delrin may be a good option. I didn't want to do that much research as plastics...

Was a little concerned about the small m5 cap screw that was the only thing keeping the wheel nut from loosening, so I did a modification: https://www.steelsoldiers.com/threads/from-fire-truck-to-mtv.216741/post-2544472

Wasn't a big fan of the split collar that came with the ECO hubs, mine is the one with an M5 screw. Considering if that clamp failed, the entire wheel would detach I started looking at another solution. This got kicked into high gear when I checked for wheel bearing tightness and I had play in...