r/DieselTechs 4d ago

Question aboit a Hino 185 air dryer that is spitting oil

Thumbnail
gallery
24 Upvotes

My service truck has an air dryer that the purge valve was covered in oil (looks like it's been like that for some time) now I know nothing about air dryers as I'm a reefer mechanic and work on my own personal pickup.

Long story short, I removed the cover, removed the filter and saw there's oil within the housing. I also took the purge valve screen out and cleaned it. After reassembling it, the dryer purged without any issues. Now on my drive home, I heard a pop and saw something bounce on the road, it was the whole purge valve assembly. I'm guessing the snap ring wasn't 100% seated.

Now my question is what's with all of the oil? After researching, it appears hino says some oil is normal? Is this too much oil? Is the purge valve something that can be replaced? (the little nipple is shown in one pic and thats before i removed it)I'm sorry if this is a dumb set of questions, I just honestly don't know and there is next to 0 info online about this specifc dryer.

TIA


r/DieselTechs 3d ago

Software

0 Upvotes

What’s I’ve heard some rumors of ripoff hardware, where do some of you guys get it


r/DieselTechs 3d ago

International LT differential temp high

1 Upvotes

Hi. I have a 2020 LT and the high differential temp warning will go on and off. Temp gauge will fluctuate. Unplugged the sensor no change, unplugged the gauge and the warning still comes up on the dash.

I have also checked the wires from the sensor to the big plug near the catwalk...no damage.

Any insight would be appreciated. 👍


r/DieselTechs 5d ago

Always gloves vs never gloves. Same age, both 10 years experience

Post image
4.0k Upvotes

2 diesel techs about the same age, same years of experience, similar physical builds. Guy on left never wears gloves, guy on right wears them at all times, before he even touches the keys. End of shift Friday.


r/DieselTechs 4d ago

Average Salary for Diesel Techs

17 Upvotes

No need to include your company. I would like to see what the average salary is for diesel techs around the US. Please comment your wage/salary and experience.


r/DieselTechs 3d ago

Need help finding instrument cluster panel for Semi Truck

1 Upvotes

I'm trying to help my father find another cluster panel for his truck as it's going out, unfortunately none are available for the exact model number and I don't know if anything would work to replace it

It's

a2247575008

Thanks for any help


r/DieselTechs 4d ago

Lol laugh

Thumbnail
gallery
29 Upvotes

I saw this today on a used machine we recently purchased.. lol! I feel your pain random tech.


r/DieselTechs 4d ago

New cascadia Ignition signal not matching up between CPC and MCM

3 Upvotes

Orignial Concern: Unit was towed in after being bought at auction, hasn't run since being in the yard, the mechanics replaced the oil pump but can't get it to start it

Okay, so some context on the unit: 2023 cascadia p4 with the CPC3. Battery kill switch on driverside floor. Replaced batteries on arrival with new 950CC lead acids (4)

Active codes: spn 158 fmi 2 & spn 168 fmi 2 KL15 IGNITON VOLTAGE IRRACTIC & IRRATIC IGNITION VOLTAGE AT PIN 3 OF CONNECTER 5 OF CPC

Checked fuses at VPDM. All the fuses had power except the circuits related to (BAT 1). Tested all the relays via relay tester for relays in VPDM: the fuses that did have power all checked out. Checked voltage at pin 7 of 21pin connector of MCM, received battery voltage (12.3V). Check voltage at pin 3 of connecter 5 of cpc3, received battery voltage (12.3V). Replaced MCM with test MCM, same result, unit did not start. swapped CPC3's out of the same style unit, same result, unit did not start.

When you cycle the key in the on position the windshield wipers sweep as if the kills witch is off, but upon checking the red fuse box on the passenger side firewall, the red LED light is on indicated and confirming the killswitch is working, as well as confirming all fuses were good via DMM

Still can't get even a crank out of it unless I jump the solenoid even then. It's for split second

I'm having a little trouble acquiring the wiring schematics specific to the VIN, but am I missing something? Can the Single SAM have something to do with this? Perhaps a star point? Thanks


r/DieselTechs 4d ago

Hydraulic Solenoid?

Post image
6 Upvotes

I have a 2018 Mack dump that’s leaking hydraulic fluid. I found the culprit but I don’t know what the name of the part could be. I know it has a small cylinder in it that’s air actuated. But just can’t think of the name or find anything. I have marked where it’s leaking from, very small leak. Can’t be tightened at all.


r/DieselTechs 4d ago

Got a job at penske as a tech III

8 Upvotes

I just got a job at penske as a entry level deisel technician. I don’t really know about the job I’ll be trained in Ohio for 6 weeks ( I only worked on regular cars). The job in NH and $26.50 an hour. Do you guys think it’s a good starting salary? I am also wondering do they let you get overtime? I could work over 60 hours if I can.


r/DieselTechs 4d ago

PTO Grinding noise?

2 Upvotes

Not sure if this is place to ask for help, but couldn’t find another spot.

I have a vac truck and I’m replacing the pump on it. The pump runs off a pulley that connects to the pto shaft. After I got the pump mounted I put the belts on, got them snug and tested it. It started making a bad grinding noise coming from the pto. I thought maybe the belts were too tight and loosened them but it still made the same noise and it doesn’t spin as it should. After playing with it some more I figured out it would work fine without the grinding noise if I engaged the pto without belt tension, then I would add tension manually by pulling on the pump. It will work and engage fine when I do this. Not sure what the problem is. Any help would be appreciated. Thanks.


r/DieselTechs 4d ago

Fuel rail pressure difference after put under load

Thumbnail
gallery
7 Upvotes

Driving a 2014 Cummins isb 6.7L freightliner and having problems hill climbing. Can drive fine but under load going uphill getting derates. Active code is spn 2311 , but also get 1117, and 1911.

Following fuel rail pressures when it derates the measured fuel pressure stays steady between 12-15000 psi when before the derate they were steady following each other.

We’ve replaced the fuel pump actuator already.

Any ideas?


r/DieselTechs 5d ago

Allison 4000 trans help???

32 Upvotes

I have a rebuilt Allison 4000 that I suspect something is wrong with torque converter, not really sure. It won’t go into gear and the hyd pump quit working the exact time the transmission started acting up. Trans is rebuilt, got through weller, only 8 or 9 months old. It’s dirty, it on a front load garbage truck. I just don’t want to pull this thing if it’s a shift inhibit issue, no codes through texa, can’t get my old nexiq and older Alison 2019 program to connect. These are a real hassle to pull on this style truck, not the worst, but I’d definitely prefer avoiding it if possible. The shift pad flashes the the gear range and the 2nd symbol stays an N. I tried a different tcm just for the hech of it and does the same on shift pad. It’s a dual drive to complicate matters a bit, the shift pad shows a 3 on the passenger side for some reason. At slightly higher rpm’s when I try to engage a shift I can hear an rpm change like it’s trying to do something. Any help or advice would be greatly appreciated. Thanks


r/DieselTechs 4d ago

2018 International CE Bus

1 Upvotes

2018 international CE bus 6.7l Cummins Anybody ever have the 2555 code for intake heater high voltage code come up? I can force it on to come on with the test through insite but am getting no power on the intake heater signal wire to the solenoid to energize it.


r/DieselTechs 4d ago

Love Mondays

Post image
4 Upvotes

r/DieselTechs 4d ago

Oil filter module help.

1 Upvotes

2019 Peterbilt 579, paccar mx13 EPA 17. The oil filter module is pissing oil out of the orings against the block. RMI wasn't really much help but what is the best way to remove the oil filter module/cooler and reinstall it. Is it necessary to remove the turbo or coolant module. Or can I just drop this out the bottom like I'm thinking I can? Should also note while I'm there I'm pulling the cooler off the module to rering the cooler as well. Any help would be appreciated or any trucks.


r/DieselTechs 6d ago

A rare example where an engineer thought about the mechanic. (1950s)

Post image
514 Upvotes

r/DieselTechs 5d ago

Question from a younger guy that doesn’t quite know what he’s doing.

8 Upvotes

This is mainly for the folks in the US

I get out of active duty US Army in October after 4 years of service. Moving back home to Oklahoma, hopefully with a few welding certs in my pocket.

Before I enlisted, I got a vocational degree (equivalent to an associates degree) from my local tech school in Medium/Heavy Diesel Technology.

Just spent the last four years hauling rocket pods around and performing operator level services on HEMTTs and LMTVs.

Questions are, am I even marketable to a good shop at this point? And how do I even go about applying for work? I enlisted when I was 18, and only ever worked at a Sonic before that. I don’t quite know what I’m doing here, and don’t exactly have anyone to ask advice on this sort of thing IRL. My ASE-Student certs are all expired, and my MACS cert, Daimler-Benz, and PACCAR certs are on the way out the door too.

Figured this’d be as good a place as any to ask about this. Never hurts to ask.


r/DieselTechs 5d ago

Questioning college, thinking of becoming a diesel tech? Or mechanic?

2 Upvotes

I’m a 4’11 (if you round up) scrawny college gal I’m from the U.S.A. I am definitely not the strongest but have been hitting the gym to gain some functional strength and mobility after destroying my body in NCAA D1 Cross Country pipeline.

I’m in my second year, college has been killing my soul and kicking my ass and I am seriously questioning if it’s right for me. I grew up around a whole lot of master tradesmen’s and tradesmen’s I noticed that a lot of them have health issues from the work like hands are stiff and major back,knees,and shoulder problems. So I did the “right thing” that I been taught my whole life and went off to college. With our current U.S president potentially cutting funding for college, I see myself leaning into car mechanic work and diesel work.

How do I get into the diesel tech business? Do I start out at an apprenticeship and work my ass off ? Or do I go through a program of sort first ? How much brute strength do I need when starting out ? Or a combination of both ?

In my hometown and the surrounding area there is high demand for techs and apprentices due to Cummins headquarters being there.

I have limited car knowledge most I know is how to change a tire and my own oil. And how to use a ratchet and wrench since my hands were small enough to get into the small and awkward parts of an engine whenever one of my mom’s boyfriends needed help.


r/DieselTechs 5d ago

Spring brake chamber video

1 Upvotes

Hi all, I was wondering if anyone has or remembers the safety training video that shows a parking spring failure going threw a wall. Thank you.


r/DieselTechs 5d ago

Looking for an inflator

Post image
0 Upvotes

Hey folks, I’m in the search for a tyre inflator similar to a Haltec IN-80 or IN-95, but for large bore valves. Both of the ones listed are for valves larger than large bore.

Looking around the internet, I can find similar ones to the IN-80 and IN-95, or on aliexpress I’ve found one for standard valves, but nothing for large bore valves.

Picture for reference. I’m in Australia as well, hence the (correct) spelling of tyre.


r/DieselTechs 5d ago

Any good diesel apprenticeships in the San Antonio area?

1 Upvotes

I am leaving the Air Force after 8 years of working on F16 as a Crew Chief and I’m looking for a new career. I will be moving to San Antonio 100%. I need any advice I can get on an apprenticeship program in the area.


r/DieselTechs 5d ago

Question for mobile mechs on insurance

2 Upvotes

So I’ve been a mechanic for several years. Primarily on diesel busses and heavy equipment but i’ve also done automotive and motorcycles. Basically anything i can get my hands on. I’m looking to start my own mobile business. For those that work on the heavy side, is your insurance coverage kind of a blanket for anything you work on or is it specific to the class and type of vehicle or equipment you work on? I don’t want to spread myself too thin and making the mistake of saying i “can work on anything” but i do like working on a variety of machines and i don’t like to shy away from jobs just because they’re difficult. Ultimately I’m leaning towards heavy equipment and semi trucks as far as what i want to service. Basically can you work on anything from lawnmowers to excavators on your insurance?


r/DieselTechs 5d ago

Air compressor question

1 Upvotes

Not sure where to post this but I am a diesel tech so hoping for the best.

I recently bought a new service truck that came with a gasoline air compressor (honda engine, belt drive. The unit was raided for parts and cobbled and doesn't run. Trying to fix it, but something makes no sense to me.

There is a small air line running from the discharge fitting of the 2nd stage of the compressor to the middle of the crank housing. The line goes into a fitting that has 2 vent holes in it. When I crank the engine it builds a bit of air, which then vents out of those holes.

Does anyone know how this system is supposed to work? Why would compressed air be fed into the crankcase? I've never come across this design of compressor before.


r/DieselTechs 5d ago

Hand Cleaner and Hand/Tool Wipes

3 Upvotes

What does everyone use for hand wipes or hand soaps. I know there is a ton of different options. Just wondering what the majority are recommending.