This is a word of advise that the mechanics at our new Holland dealer gave us for keeping these units clean in skid steers. Never use the foot throttle, always set the throttle at or above 1,600-1,700RPM for low engine speed work. The less you burp the throttle, lug it down and any other conditions that make a non emissions diesel blow smoke the better off you are. And short run times are extremely bad on them also... sometimes it’s a necessary evil but it’s something to also be mindful of. What it boils down to is the machines are very efficient at cooling themselves off these days and the emission systems NEED heat in order to work right... That’s how they have instructed us to run ours after they replaced the whole emission system in ours and I haven’t had as much as a hiccup out of it since. Anyway, something interesting I thought I could pass along. I’m glad y’all had a happy thanksgiving!
13 year and counting heavy truck tech here. That first section is called the DOC or diesel oxidation catalyst. That is what creates the heat (900 to 1150 degrees F) to convert the soot into ash in the filter. Ash takes up less space than soot. We use a pneumatic cleaner at our shop with a regulated pressure to 150 psi. We leave ours in the cleaner anywhere from a half hour, to an hour. You will most likely have to have someone connect to the computer and either reset the soot level, or reset the after treatment maintenance. Otherwise the ECM will be adding more fuel into the exhaust than needed and could plug your filter up even faster.
I can honestly say that I know absolutely zero about diesel engines, didn't honestly think it was that dirty until you hit it with the pressure washer the first time and no water whatsoever came out the bottom. I have learned a lot watching you and Aaron, and Matt, and Captain Kleeman repair equipment. Keep the videos coming DP.
The first "catalyst" after it bolts to the turbo is actually called a D.O.C. (diesel oxidation catalyst). It is a flow thru design to do 2 things, the ceramic inside gets hot as fuel hits it, it also acts as a "spreader" making sure the whole D.P.F. gets the heat it needs. The only thing the D.P.F. does is converts soot to ash. Thats it. But depending on how much soot is in it, is how long it needs to regen. The SCR, like on your volvo, converts nitrogen to oxygen in a round about way. The Def is a chemical reaction that is done at any temperature. I have washed a few D.P.F.s after an EGR cooler failure and it fills the exhaust full of coolant. We have an in-house cleaning machine that blows low pressure air backwards and catches it in a big vacuum. Keep up the good work Mr Perfect!
And saving $700 isn't that bad either. I had a VW diesel car, yes one of the ones from the diesel gate scandal, and the DPF filter ($2300 for the filter replacement alone, not including labor) would clog every 6 months. I kept taking it back to the dealer saying the car was faulty. They actually had the nerve to say "you are driving the car wrong". Not 3 months later they purchased the car back from me and I will never purchase from VW or any of their associate companies or recommend them ever again.
@@ahnilatedahnilated7703 Clogged DPF every 6 months? I had a BMW with a diesel engine that also had a DPF in it and I drove it 200k miles over 6 years and never had any issues with the DPF. Diesel engines with DPF's hates short runs and need to get up to temperature once in a while so they can regenerate (basically burn off the soot they catch when engine is not running clean enough) so if you never give the car a good workout it will fill up the DPF eventually. I drove mine like I'd stolen it and it ran beautifully all the way until I sold it.
The first filter is the diesel oxygen catalyst, DOC. The second filter is the diesel particulate filter, DPF. It is in the first stage that the high recombustion temperatures occur. There is a fuel injector to help develop these high temperatures during a regeneration cycle. When the filters develop restriction, a differential pressure sensor tells the electronic contro module, ECM that a regeneration cycle is needed and the operator is notified of this by a warning light. If the filters do not become unrestricted during the regen cycle the filters need to be removed and cleaned or replaced. Most tier 4 engines over 75 horsepower use a diesel exhaust fluid, DEF injected into the DOC to help the whole process work more efficiently and they do not require regeneration as often as the tier 3 systems.
Talk to any excavating company that ever started from scratch, you'll never make it if you have to pay an outside mechanic to fix your equipment. We wrench on everything old to new. Knowing your equipment is key💪
Construction machines have the same problem as trash trucks, they don't spend enough time under heavy load to burn the filters out properly like a long haul truck and trailer. I've seen less DPF problems since changing jobs to hauling trusses, couple hours on the highway keep them cleaner than the stop and go a trash truck does all day.
It’s true and like the guy above said CNH told us to have owners run a constant high idle all day (yea I went to school in Memphis too) prob it this. This works great on a tractor in the field or a hoe digging dirt for haul trucks or even a dozer working as a push CAT but not for a skid steer or dozer doing grading work or a small (or big for that matter) track hoe digging a ditch with people in it and pipe that needs set and rock placed in it. That not reasonable operating conditions for the machine or the environment it works in but as you would guess they didn’t much listen to the techs.
from what I have read any time the DPF is wet/washed out with water it should be brought up to about 205 degrees F and then taken up to about 250F to 300F and cooked for an hour or 2 before being put back in to service as a little bit of water can cause cracking of the medium when thy start getting in to high temps, keep in mind they quickly reach high temps from the DOC, good video!
👍 Worked out well and you did it on your schedule instead of a service outlet schedule. The brakleen step was a good idea since the thing probably relies on some sort of electrostatic charge to separate the particulates out. "electrical bridging" across surfaces from water deposits can really diminish operation on some types of filters. Thanks for the vid!
I like to see a guy thats brave enough to try to fix something he knows little about. I was up to my elbows yesterday in a hydraulic valve and I've never had one apart until then. Hopefully my repair lasts like yours has. Keep churning out the great videos and stay safe.
Good morning Mike and HAPPY THANKSGIVING to you and your family. Thank goodness for RU-vid. Take care and have a blessed week. Oh Congratulations on the 50,000 sign SOT made for you.
Ok when they pull out of truck they check to see if those holes in place. That is the filter element. Now they prefer baking and letting cool then use high air pressure to back blow soot out. First chamber held catalyst plate which creates the high heat to free soot to be pushed out by the exhaust pressure
Mike next time you have to clean it. Use the original blue windshield washer fluid. A friend of mines dad is a chemist. He said the blue windshield washer fluid is made to clean carbon. If think about it carbon gets on vehicle windshields. God bless
Get an oven for baking ceramics. Bake that thing, then blow it out with air. It will be clean as a whistle. (It's what our shop uses to clean the dpf filters on all 70 trucks we have)
A product called zep 50 will help you immensely, if you ever have to do this again. I simply melts carbon. I would caution that you use it in accordance with the manufactures directions.
If a person decides to have a DPF professionally cleaned, be sure that they do a complete cleaning. Just blowing and shaking won't do it. My neighbor at work had a problem With the DPF clogging on a Cat skiddy and they sent it to one place and they continued to have problems. They finally listened to me and sent it a different place and they have had zero problems since. Moral of the story is that not all DPF cleaning is the same. Also, note tgat cleaning the DPF is part of the preventative maintenance schedule.
I'd run it like it was meant to be run, diesel powered heavy equipment that is hydrostatic driven you set the throttle to higher RPM and go to work, controlling your speeds through the controls of the machine.
@@movermike2216 I agree that hydros should be run at higher rpm but you said wide open. I disagree with that. All that does is make a lot of noise, wastes fuel, and decreases engine life. There is something you need to understand about diesel engines. Horsepower and torque drop off at higher rpm's for diesels. The diesel engine is most efficient at rpm's between 1300 and 1800. This is because diesel fuel has a slower rate of expansion upon ignition than say gasoline because it has a lower vapor pressure. But on the other hand, it can develop more expansion than gas. That is why they can develop so much more torque. Torque is what you are after when you are doing work and that's why working machines like trucks, tractors, and big boats all use diesel engines but they don't operate them at full throttle.
Good video again good job brother save yourself $700 dollars That’s the way to do it you figure stuff out to save money always good to save money my friend have a good day
I have a new Kubota M7060 HDC12 Tractor. It went into stage 5 regen at 144 hrs. I still had good power, all I wanted was enough to haul it back to the dealer due to it being a new tractor warranty.... NOPE! They hooked it up to a laptop, tried to do a Manuel regen, NOPE, said it missed a regen @ 130hrs, another @ 136hrs and boom, 144 hrs into Stage 5, dead soldier! They want $3-$4,000.00 grand to put a new one in. POS! My Pop is 85 and putters around putting hay out, never makes it "grunt" and likely hit the "By Pass" button to shut up the beep. I told them I want my clogged DPF back ( they sell remanufactured that require core exchange) I'm going to try your trick. IS IT STILL WORKING WELL? Thanks for making this video, d
My newest Kubota has one of those darned things, and it's going through a "re-gen" cycle about every 3 or 4 hours of run time now, I'm guessing I either get to try your method, or spend $700 soon. Guess which way I'm leaning now. Thanks for the RU-vid diploma!
It might work better if you wash before you rinse and repeat. Wash, rinse, repeat....Old habits die hard. LOL Next time you do a building tear down and find an old oven, you might be able to use it at the shop for a DPF oven. Or maybe a remodeler has a take-out self-cleaning oven you can set up. Baking appears to be common way of getting the soot loose.
Good job. When I draw lines across parts like that I found drawing them diagonally helps. Hope it lasts for ya' for a good while, $700 goes a long way.
The cats we had when the DPF were baked out which we could do , then the dealer would have to reprogram the ECM so it knew that the filter was cleaned. the end user could not do the update. Oh and the soot that was removed went to the landfill.
Just a thought, I have always found that a, good quality brake cleaner, works great for cleaning like O2 censors and other exhaust related clogs/carbon build up, I don't know if it makes a difference of being diesel, but It's always done a great job for me.. Also a good long soak in the parts cleaner could help.. I noticed you pressure washed first.. I, just my opinion, would be to either soak in a parts cleaner first or soak with brake cleaner, cause the solvent in those would break down the carbon and other particulates, then finished off with a good pressure wash, to force the goop out.. Seems what you did worked too.. Hope your family had a healthy & a very Happy Thanksgiving... On to the next one.......
If you want to bypass it on off road equipment you can but a truck that goes on the road I wouldn't. I did look into it and the fines and possible criminal penalties are not worth it and if you want to sell it good luck. I hope this method works out as I would try it. Thanks for the video.
We used as precleaner before placing them in the steam cabinet for a couple hours it works pretty good. Isopropyl and window cleaner also work good as a soaker to loosen the carbon up. I seen up the chat someone said sea foam that too I think would work real well t the nature of the chemicals at play. But dawn is the cheapest and prob best eco friendly as it don’t react badly to the others detergents we used in the steam cabinet or to rinse it out later. Using brake cleaner like Dap said or isopropyl does a good job of getting the water out of the filter ( this isn’t a problem unless it’s not blown out real good). We were told not to put one of these back together wet or if one went for a swim it should be dried out before it’s ran.
Great information for us folks that don't like spending hundreds on having one cleaned. You could really tell it was clogged when no water came through in the beginning.
$700.00??? We have a CAT 259 I was just told by our CAT dealer that it was 2500.00 to clean DPF filter and since current filter is at 200 hrs and filter is spec'ed to be changed at 300 hrs that for 5500.00 would be replacement cost. I agree with several of the comments on here by others that a small business guy could not afford to follow "recomended" service guidelines.
I’m so glad you showed this video! I have a Kubota tractor that has this system. I’ve been thinking about doing a self cleaning when that time comes, so now I know I will try it after seeing you do it. How many hours was on the machine at the time you did this?
I’d love to give a straw to the people who designed this mess and say breath out of the straw. That’s what they are doing to these motors with all of the crap they are doing!
I thought those DPF filters had a regen cycle built into the engine computer which was supposed to come on automatically to clean the soot? Though, I could have misunderstood how they are supposed to operate?
Oh I know I am very good at voiding Factory warranties and you probably are too sometimes it takes all the fun out of it if you don't LOL Keep On Keepin On
How many hours are on the machine and is this the first cleaning that you know of for that filter. Also did you lose some power and regain it after cleaning?
On one of the trucks we had you can bypass the DEF. Gotta have ecm reprogrammed and swap out some parts. Cost about $1200. But it's done and over with.
Thank you for posting videos like this. I am trying to remove one of these from a TAK TL12. It looks like you had to remove a few things to gain access and remove this one. Do you know of any resources that might help and show how to remove the filter so it can be cleaned?
a friend of mine works a cat, cleaning these and air filters, thats all he do day in day out. yes they charge a lot to clean these, but the truth of it all, these are set in a tank of parts cleaner and carb cleaner 50/50 mix and left to sock for 12 hours the flushed out into the tank using a simple air gun that sucks up clean parts cleaner and carb cleaner to wash it out, left to drip out and then put in an oven like deal to dry, then put back together, simple as that. the tank cleaner is pumped though a set of filter and strainer to keep it clean, these screens are cleaned out into the trash, and the 4 sets of filter get replaced once a month or longer, and thrown in the trash,, nothing special at all.
We used a steam cabinet with the approved soap in it and then rinsed them with a water hose for till clear and blew them out. They made an air flow gauge that they set up off a new filter that the back pressure blew a ball up the clear tube the low setting was flow of new filter the top was plugged. DPF filters of washed enough will eventually get to a bypass flow that is much better than new. The dealership recommends replacement at 10% or something like that better than new filter flow. At around 50% better flow you start ending up with DP Fluid flow issues with the emissions settings. That is the point where they seemed to get deleted a lot.
I got my Yu Tube Certificate to... What's is the worst, if u can't wing it, you have pay the 7C Notes to fix it. But I got a feeling you'll do just fine job.....
