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Driving a diesel around above the peak torque RPM is like driving with an exhaust brake on due to all the added pumping losses. You burn a bunch of extra fuel and create a bunch of added engine heat to overcome those pumping loads Then there is the added losses from the 6 gearboxes at the...

What General said You are probably never going to get to the weight and conditions that aux cooler was intended to deal with. Your system has the same heat exchanger all the other trucks have, you can simply plumb the trans out and in direct to the cooler by removing the thermal mixer, and...

OK, well the buzzers should be going silent ~90PSI then unless you have a sender issue...

Yea the outer seat looks like it was put in like a helicoil and would take an extractor to remove it. The checks don’t provide all that much resistance as the cab can move pretty darn(scary) fast before the check ball seats:) the RO in the rod end port on my cab cylinder was an Allen head...

Ok yours is the first cab cylinder I have heard locking. I have gotten mine to start to lock lowering the cab too fast since my manual system allows me to control that speed with a dial/needle valve(starts bouncing as the ball locks and releases). Then there is the one that didn’t lock and...

Have had no issues with AW32 at any temp I have tried it, it does thicken at very low temps. Both are considered ~10wt hydraulic oil at typical temps... the only cylinder checks I have ever seen jam are for the tire crane and only in the lower direction, and I think that is entirely due to...

Genuine Delco or a Delco “compatible”:)

You only need (or want) 2 batteries. 4 are too much load for the 60A/40A alt. there is an Allen head plug on the passenger rear corner of the hand pump. Fill it and replace the plug(it must be sealed). You also need to put some up in the air op pump reservoir between the spare and the air...

Yea, strange S#!^ happens in the mythical land of mil-spec… I bet that surplus minute didn’t last for long:)

Nice project, but what do you have planned for all that power? Real bat-signal searchlight on the back:) 250A@28V is 7KW of power… to put this in perspective, my backup genset for my house is a slow speed diesel, ~6.5HP so can deliver a sustained 3KW of power. That gets me every light in the...

thank Dave Ramsey:) how high do your air pressure gauges get? If they are not making it to 125, something is wrong, bad pressure sensor, air leak(most likely), mis adjusted governor or compressor problem... i would recommend introducing another way to measure air pressure, like screwing a...

mine had the property transfer document(ticket to DRMO) showing the original cost taped to the dash when I got mine. Found a telephone emergency contact sheet for a base in South Korea when I pulled out one of the crew boxes:)

It is confusing, and I don't like coincidences! but like any elephant it still has to be eaten one bite at a time:)

yep, CTIS won't power the buzzer. On the A0 the primary and secondary air pressure senders also contain the low air pressure alarm switches that drive the buzzer. I think they go on at 89PSI, so should clear the buzzer when the pressure goes slightly above that. the pressure senders are right...

You should also be able to jump K01 pin 30-87 and the engine should crank…

Ctis has no such control or any interface with the start ckt. They both draw ign power but thru different breakers/fuses… when you turn on ign, K02 provides ign power to everything via fuses. Some of that power passes thru the vim neutral relay and goes to the start relay K01 pin 86, that's the...

The truck won’t crank/start? CTIS has nothing to do with the start circuit.. CTIS senses the same pulse per mile signal that the speedometer uses. It’s pea brain compares that to a lookup table that has a different value for each tire pressure selected and will warn the operator if he is...

Yep and that was one of the points of going EFI, to clean up the exhaust using engine temp and pressure to fine tune the fuel. All a mechanical knows is dump fuel to get commanded RPM. Without an O2 sensor, opacity sensor, or an EGT to close the loop, I suspect the HEUi may revert a little...

suspect it will have no relation to ABS... PCU is under the passenger dash, check the connector, and use a ohm meter to ring out the 3 solenoid circuits...

one factor is engine type. a mechanical has no real way to know how much lower the pressure is, and delivers fuel mostly on engine RPM and governor input setting with perhaps a little boost pressure monitoring to limit full fuel application until adequate boost is detected. so less air = more...