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I installed cruise control on the 3126, I wired in a service brake input using a change over relay, and I had to figure out the cruise control set resume polarity in relation to switch and ecm. If you have CAT ET, you can live view what position the set/resume is. On my truck when the cruise...

The bed removal is not required to remove the transmission, if you can provide the same access as if the bed was installed it is possible. My friend had his transmission replaced at a service shop, and I think the hardest part for them was dropping it, I think the weight and balance was...

when I run the PTO or have the TC stalled the fan does cycle, but I am assuming that is from the tranmission producing heat. When I had the geared hubs the fan cycled quite a bit. Also my fan did cycle when my exhaust brake got stuck closed and I was driving on the highway. The temp needle...

Reading through the recommendations is that you should use the highest viscosity for your temp range CAT seems to think 10W-30 is what is best for my temp range up here in Alaska, 15w-40 is just so common and significantly cheaper than trying to find a different grade. My truck has been run...

Do you think a thinner oil would help reduce restrictions, maybe increase the speed of the fluid moving though the pump? CAT gives specs all the way down to a 5w-40 DEO for the 3126. Most hydraulic oil I have seen run in a similar style pumps have been skydrol a vinyl ester based fluid that is...

I know these style hydraulic pumps are very reliable. A swash plate hydraulic pump are ubiquitous for most aircraft hydraulic pumps. They can go over 10s of thousands hours without failure. Most of the time they fail due to low fluid levels causing it to overheat. Why does it lift, is the fluid...

There might not be an engineering or solution to the puzzle, it could be that the pump for the 3126 is under-built, and may be required to change once or twice in the truck’s life cycle. The failure is hard to predict because the ECM is what decides at what pressures when to fail. Most of these...

Do you think it is a clone of the ford powerstroke, it looks similar sized.

My guess is that it is a variable displacement hydraulic pump, it can deliver a variable flow rate and a variable pressure at a wide rpm range. I think the failure is that the pressure is not adequate for the ECM desired fuel schedule and that is what causes the pump failure. My observation is...

Thanks for all the advice and experience. I ordered some eyewear for the family and new respirator cartridges, i am also going to stock up on eye wash. I have a spare intake filter, fuel filter and will be getting new oil and water separator filter. I am planning on cleaning out the intake...

Hello all, I live in Alaska and there is a good chance that a volcano can erupt and deposit a glass or silica ash around town. Is there any suggestions or experiences here that can help with preventive maintenance and operating? I have the stock air cleaner with the seperator, I am assuming...

Someone on Facebook had a similar event on the 3126, except it caught fire, shorted to ground then took out all his batteries and alternator.

I think every 1000 feet is like something of a 4-5% pressure drop. It may also be non linear the higher up you go. You would have to find some engineering data or test done at altitude to confirm that the engines can operate at your desired altitude. found an interesting test done for diesel...

I think there is a rating of power at max altitude listed on the data plate, mine has a 3000ft listing. I assume there is just a loss of power for elevation gained. do you have any noticeable loss of power at 8k?

The SN cutoff for the bad bearings is pre 6510072174, SN for the composite thrust washer is post SN 6511014364. The Allison documents that are applicable are SIL 17-WT-11 SIL 29-WT-96

https://www.steelsoldiers.com/threads/ctis-pressure-settings-increase-no-programming-transducer-or-module-required.216446/ GeneralDisorder did a post about the pin program settings on the CTIS controller. That is prob where you got that pic from. I have not read through it, but is makes sense...

Good tape to use is F4 tape or fusion tape, it is a self sealing silicone tape. It is used a lot in temp wire repairs and insulators for the aerospace industry.

It look like the PTO PN is 276XMFJX-D5XK per -24 LMTV TM, I could not find a parts desc for the 276 all I could find was for the 277. Most of the numbers line up. It gives an output type of a 2 or 4 bolt sae b whatever than means, I don’t know if the spline is the same pitch or diameter. See...

Looked up the pump for the winch truck, it is the same PN so I think all the hyd pumps off the pto should be the same.

B5501-33364 for the pump, best I could find on the -24p manual. What happened to your pump?