Anyone know where the ac pressure switches are? I think the boss has one disconnected till its really hot

I work for a fleet, decomp pipe flange rotted away and melted DEF injector coolant lines and DEF supply to injector. Curious if the driver overheated the VGT actuator and cooked it. Haven't checked the power/ground and CAN yet. Drained about 5 liters of coolant so they definitely overheated it. The 5177 code is where this one gets me.

What are your thoughts?

Ty

Edit - Not a ISB, my mistake. It is a ISL

The shop I work out of does maintenence for the company's fleet as well as loads of outside work.

Anyone know if these trucks have a blender door and location? The dial doesn't adjust temperature. Unless they control the air temp differently? Thank you in advance

A Bogie pin has excessive movement and will not lock. What is the cause?

A) Worn out pin

B) Bad bogie pin guide/spring

C) Rust jacking

D) disconnected linkages

This is how i break down this question. A worn out pin would case movement in the slider rail holes but it would not prevent it from locking. Rust jacking no, Disconnected linkages could cause your pins not retracting but i don't know about from locking tho. See B seems like the most correct answer to me because bogie pins are spring loaded and I've seen instances where the spring has snaped due to rust . The only part I'm a little confused on is I'm not familiar with the term bogie pin guide?. With a broken bogie pin spring you would be able to move the pin in and out because there is no pressure on the pin

Hey all,

So I've been trying to get into the industry for about 3 months now. TONS of shops around me are hiring anyone that knows just a little bit. I know extremely little about working on diesel equipment, despite working on my own vehicles for all of my life. I'd say I'm mechanically inclined. Just never worked on large equipment.

I've sent out resumes to every shop and have had 3 interviews. 2 with local truck shops and 1 with a caterpillar dealer. 2 out of 3 wanted to hire me but we're saying that they don't have the time or manpower to train someone new.

I'm In the space coast of Florida and there are no schools near me or training centers to get myself started. Maybe in Orlando, but I'm looking to become an apprentice.

I reached out to the recruiters at Caterpillar (my top pick of where to work) and they basically said to just keep an eye for an opening and not much else.

What should I do guys? I'm ready to get the rest of my life started.

Any fire apparatus techs here? What brand do you work on the most?

Are they legit is it actual dealer level OEM programs or is it too good to be true

This question I've seen on the red seal is driving me nuts

There is excessive movement at the upper coupler plate of a trailer, What is recommended for repair

A) Repair Bad cross members

B) Remove plate and clean rust between rail

C remove scuff liner and clean rust

D) forget but it was stupid

I wanna say B is the correct answer because on a dry van trailer the upper coupler is bolted to the rail via rail bolts. since its a steal plate against an aluminum rail their bound to be corrosion and that could cause movement IDK

what are your guys thoughts on this?

I have looked for my plug in for a few weeks and I cannot find it I went from the heater unit and the glow plug rail followed every wire and still cannot find it if anyone could help

What does this mean? Kept going on and off it’s on a Kenworth T680 2016

What are the problems to look for on a 3126 cat engine?

What causes a lose upper coupler plate ? Is it from rust jacking between the aluminum rail and steel plate

Any information would be helpful-Thanks

got a 2016 cascadia daycab dd13 eaton auto with recurring injector codes

spn 651 fmi 3 changes from fmi 5 to 3

spn 652 fmi 3 changes from fmi 5 to 3

spn 653 fmi 3 changes from fmi 5 to 3

spn 656 fmi 3 changes from fmi 5 to 3

spn 655 fmi 3 changes from fmi 5 to 3

spn 2797 fmi 3

they are all very random and only seem to occur when engine is at temp, engine will begin to misfire heavily and occasionally shut down. both injector harnesses have been replaced, engine harness and engine ecu has been replaced. checked resistance on injectors while engine was at temp and all came back fine. while codes are active and engine is misfiring clearing the codes will activate all cylinders again which is weird bcs if it was an injector mechanically damaged it would continue regardless of clearing right? any ideas or experience with this?

Hey everyone! Recently got an offer from Vulcan Materials and just wanted to ask for some insight if anyone here has worked for them. Seems like a great deal but also weary it may be too good to be true. Thanks for everyone’s time!

1998 international 4700 DT466e motor.

I recently did a service on the truck. Oil, fuel filters and change. And got the AC running.

the truck is sputtering at idle. And is now starting to sputter while driving.

It boggs down oil pressure drops to 20ish pis at idle. 50ish psi while driving. Fuel consumption seems high.

What should I look into? Im an electrician by trade and can spin a wrench on gas motors. Diesels are new to me. Any info would be appreciated. Thanks guy

Air bags keep dumping as soon as you start driving. On idle it's fine, but once you get rolling it dumps. What could be causing that?

So this trucks been in and out of our shop for a month now and now im the lucky winner to get stuck with it. First guy put 2 new nox sensors and ran a scr efficiency test. Second guy had scr and dpf cleaned and also put 2 new sensors in it. Hes been trying to figure it out now for a week and finally gave up. So I’m wondering if anyone has had this issue. The codes are spn 4364 fmi 17, 4364 1, and 520372 16. So far I’ve ran a regen with the doser unhooked and the nox sensors are within 50ppm. Checked to make sure there was no def build up and I’ve also ran a def quantity check. All of that checks out. I did check the def quality which was 32.5 and I used a test strip to make sure it was not contaminated. I’ve inspected the acm harness and didn’t see anything wrong with it. The larmf numbers are all in the .6s any advice? Truck is a freightliner m2 cab and chassis dd8 with an Allison

I am a shop foreman at a John Deere dealership in Louisiana. I mainly work on cab tractors and skid steers and excavators although I will work on anything that comes in…when it comes up to “what’s your MOST used tool?” My answer is always my flashlight…im a flashlight nerd and have been fiercely loyal to the streamlight microstream usb and the strion led although I have about every model streamlight makes (lol).

I recently got a copper Acebeam pokelit 14500 that I’ve been using although the microstream in my shirt gets like 90% of my use cases. It’s so easy to mouth hold (yes I have headlamps, I don’t much care for em). What are my fellow diesel guys thoughts on lights?

Can’t fix it if ya can’t see it is what I say!!

Hi everyone! Quick question to see if anyone has had the same problem and if they found a fix! I drive a 2017 Kenworth T880 ready mix truck. Last winter it got sandblasted, re painted and a new drum put on. When I got it back, anytime my tires start slipping, the rear rear passenger tires lock up. Just that one axle. The other 3 axles will turn. It happens when I’m dumping leftovers in the sand pit, sometimes when I hit a bump while turning and sometimes even when I’m going through highway intersection where the truck bounces over the highway. It’ll lock up and put a skid mark on the road and smoke the tire. The mechanics have tried cleaning the air lines and they’ve changed out some valves. They’ll have it in the shop for a week at a time. They took it away to our main shop for 3 weeks and Kenworth came out and said they couldn’t find anything wrong with it. They sent it back and claimed it was fixed, but it’s still doing it. Eventually I’m going to get into a situation where I’m going to get stuck and they’ll have to send a wrecker because I can’t even move when in mucky situations. Locking in the traction control doesn’t change the situation either but I’m sure traction control has something to do with it. I’m not sure what valves the mechanics replaced. We have a fleet of a few hundred trucks and we have 2 trucks doing this. Anyone have this happen or any ideas what could be wrong? I’m sure the mechanics will love it when I come to them with all your ideas! Thanks!

Hi, i’m a mechanical fitter who completed an apprenticeship as a mechanical maintenance technician in the UK. How transferable are the skills of a general mechanical fitter to a diesel fitter? Is it somewhat similar or a whole other ballgame?

Hello all I just bought a 2020 freightliner m2 with the detroit dd5 engine on it, it has 350k miles. I read online that this engine is made for short hauls on detroits website, will there be an issue if work over the road with that truck? (Usually 700 miles a day)

Thanks in advance

I'm curious what controls the delay of the engine brake on Dd16 s.

Weve got 1 2020 western star 4900 (my truck) and 4 WS 49x's.

my 4900 has absolutely no delay to the engine brake. The nano secondy foot comes off the pedal my brake comes on. The newer 49x's all have a short delay before they engage l. Which is sometimes nice in low gears driving heavy.

Ide like to know if it is electronically adjusted or mechanically to add a tiny bit of delay to mine.

Is this a place where I could in theory add another motor mount with a brackets like is that what those holes are there for?

2016 freightliner cascadia (p3) automated trans with a dd15, no radar. Instrument cluster gauges goes out(oil, water, tach, speed), shifting not available, modules lose communication. Found 120ohm on 9pin diag connector c-d. Found one resistor by diag connector (good, reads 120). Cannot find the other.. I've looked everywhere I know, passenger a pillar, center dash (by cgw/abs ecu), behind instrument cluster, front driver side frame rail by radiator. If anyone can assist me finding the last one I would be so grateful :) Also, here is a picture of what I belive to be just an extension for Qualcomm or elog by cgw, if you think other wise let me know!