Bobcat Fuel Injection Pump, What you need to know to troubleshoot common rail injection pumps.

Bobcat Doosan common rail fuel injection pump teardown and a look at how it works. These pumps are very expensive and this might help prevent misdiagnosing the injection pump due to low rail pressure.
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[@shawnclemons7916]

I am a new mechanic at bobcat and your videos are priceless for me. I spent more time at home looking for information on repairing a machine then at work. Then i found your videos, and the past month i have excelled. Thank you

[@AlexPerez-gj7iu]

this is detox for me from the usual apocalyptic news and the worth less nonsense information. i love what you are doing! thanks 500%

[@daveking5549]

I have been a diesel (O.T.R) mechanic for 32 years. I realy enjoyed this video. Bobcat needs to hire you to teach new technicians in the field!!!!! Great job.

[@jrac863]

Wow that was a great teardown and a great explanation about how the high pressure pump works.This information is so valuable thank you

[@carlclose3]

One of the most informative videos I've ever seen on common rail systems. Great job 👍

[@7Westwood]

Another Great Video... Thank you so much for all the effort you put into your videos.

[@andrewgable7273]

Great trip back to school!! That was VERY fascinating. Thanks so much!!

[@martincamargo2507]

Thank you very much. All your vids are very helpful

[@coleorth2467]

Thanks again for the lesson.

[@spmservicesclearingandmulc9821]

Your videos are awesome and informative. I’m working my way through a T595 intermittently stalling under load. I was hoping it was just air intrusion from a broken pickup tube but it was all intact with strainer/check valve on the end. Getting a 157-21 Code (Rail Pressure Control Fault).

[@robertoacuna2415]

Great information with your videos, thanks for taking the time, thank you.

[@tetradgroup]

Thank you

[@DieselMate]

Love your content mate, I am field service in the UK. Really enjoying the videos! Your Very knowledgeable 👍

[@tetradgroup]

Thank you. I'm starting a podcast and would love to talk with techs from other parts of the world if you're interested.

[@DieselMate]

Hi Pal, sure thing. I would be up for that👍

[@cec6526678]

Great information with your videos Thanks👏👏

[@3Beehivesto300]

Thank you. Not many people will share the knowledge the with their skills.

[@fabiano213ify]

thank you for your time

[@BenKoren]

Thanks for all this - keep it up.

[@user-ti7dw4ri6t]

I love your videos am struggling with a stubborn skid steer bobcat not starting

[@duxnlabs]

Tremendously helpful! Thanks so much. How different will the Kubota 74hp system be? T650

[@user-ti7dw4ri6t]

Awesome my favorite instructor free and extremely useful informations❤❤

[@sambeharry-bhi1265]

Thank you ,I need to this to make a desion ,u make my day.

[@jimmybrown9595]

Thank you for the info all very helpful!

[@tetradgroup]

Thanks for watching!

[@jonathantorres80]

Your diagnosis of a bad pressure valve on the common Rail is spot on

[@Rprecision]

Thank you!

[@davidandkatherinewheeler3551]

Great video

[@alistairrodrigues32]

Very educational

[@russellgnuse]

Have done a video on adjustment on a 753 creeping my creep to the right my bother creep backwards my is a 2001 his is the 90s I think they about the same for adjustment great video

[@victorhernandez769]

Thank you...

[@victorhernandez769]

Thank you how to adjust the time on a pump gracias..

[@firewoodsolutions]

Your voice soothes me

[@MD_TETRAD_GROUP]

hey my name is mike and I work at the bobcat shop in orem I am new and I love your videos they are so helpful to a guy in training and I hope I get to meet you sometime, we have your truck here at the shop right now its a beast!!

[@tetradgroup]

Awesome, make sure he takes care of my truck, I'm worried sick, 😂. I'm sure we will meet soon.

[@MD_TETRAD_GROUP]

@@tetradgroup we might keep it! Its too nice 👌 I look forward to it!!

[@jacobwarriner5751]

Very informative video. I’ve probably put 30 pumps on and haven’t timed any of them. Was always told you don’t have to. Any chance of a video on how to build that tester for the imv?

[@tetradgroup]

I did many myself without timing but now that I understand why it's recommended I do time them now, only takes a few minutes. I will link the parts for the servo controller and motor driver, it is very helpful with the IMV and with actuators.

[@joeh9149]

Thanks! O man, I went through the ringer last year with my 2015 t450. Bobcat does not machanic anymore theyre only fix was to change out complete fuel system, every fuel line, elbow, and flush tank thoroughly. They only wanted $15k to do it! I fought it at first but after months of no resolution I ended up buying every piece myself, saved about 7k not buying theyre reman pump kit and i got brand new, i flushed the tank way more then I know they would have, replaced all the lines every part, then had to pay them to do the main parts so they could program them or whatever. Now that I have some understanding of how everything works I'm 90% sure it was a injector. Before all that I was working with a old school diesel mechanic that couldn't make sense of it all and we cleaned every ground changed cam Sen, crank Sen, fuse block/wire harness, sun of a gun. Then finished that and my joy sticks starred giving me issues, so I changed those also.lol. now i bought a transfer tank with a filter with water block and only fuel up out of this, did good for a while but twice my right joy stick gave me codes and today it wouldnt run kept giving me meturing valve code, I shaped it with my old one and got it goin but now I'm paranoid! Not to rant but I'm sure I'll have some questions for you. Thank you for your videos....

[@tetradgroup]

Awesome, thanks for the support and glad you got it sorted out.

[@James-lg7ps]

I really appreciate your informative videos. I am an old school mechanic so learning how different these common rail engines are is quite fascinating. Any idea what the life expectancy of these Doosan fuel systems are (in hours) given proper operating conditions?

[@Tfurr1958]

Enjoy your videos. Could you do one on the non-EFI fuel injection, like the 883? Thanks

[@billwhite9782]

Thank You

[@user-ti7dw4ri6t]

Thanks!

[@user-ti7dw4ri6t]

Thank you

[@tibbitsexcavating]

I've watched a couple of your videos and think you're the person that might know what's going on with a Doosan 180-3 DL06 I'm looking at purchasing. Starts up great and sounds great. After about 15 min, white smoke starts coming from the exhaust. Idling it is noticeable but minimal. Under load, white smoke comes out pretty good. I've heard fuel pump/system can be the issue, as well as egr cooler has failed. I don't think it's a head gasket. You have any idea what it might be?

[@johnnyhimes9306]

I am a newer field mechanic for Bobcat and I find your videos far more enlightening than Bobcat University training. I appreciate the videos! I would like to get a link or the name of your server driver and motor kit, is that already posted somewhere?

[@paulschultz8327]

Great video and a lot of useful info. I have a little different problem I wish you could help me with. On my 2017 s570 fuel started to spray out the little hole on the cover. I’m assuming a seal went bad. Is this something I can fix? Any info would be greatly appreciated. Thanks, Paul

[@tetradgroup]

Send me a picture of exactly where its leaking and I will let you know if it can be fixed, [e-mail]

[@DavidNistler-gh4mo]

Thank you for the video! Can you make a pump install video? Also you mentioned timing but I didn’t hear how to time it?

[@tetradgroup]

Yes I will do an install video soon

[@fredrictveite4575]

Hello boss. You have a great talent with everything you do. thanks for sharing so many educational videos! can you help me and show me how to set the correct diesel pressure on my bobcat 753 1996 model?

[@thecreekfarm4761]

Nice video and nice one on the excavator, but how do you time the pump? Lots of great info.

[@tetradgroup]

Line up timing mark on crank pulley with mark on front cover, doesn't matter if its on the compression stroke or exhaust stroke, #1 just needs to be top dead center. The pump gear will align with a make on pump but depends on which engine you have. The timing process will be in the service manual.

[@JohnCharles-nq8gr]

Great information on DIY repairs. Can you do a video of timing the d24 fuel injection pump to a T650 or something equivalent?

[@jaimecabrera684]

Super good

[@victorhernandez769]

Did i need to timing the fuel pump thank you...

[@sprintcarracer77]

I am curious does the motor haft to turn over faster than 500 ram to build sufficient pressure

[@danmiser9974]

Good video. Where were you 6 hours ago when I cracked open the fuel line to see what it was doing!

[@thehowardsgarage2480]

Not sure if you will see this comment.. but, I have a 2016 S650 with that 2.4 and I have 1 injector (#4) that has NO fuel coming out of the return line when I attach clear hoses to all my returns. Original issue is that machine won’t start unless I squirt a little starting fluid, then seems to run good, but will not restart on its own without the starting fluid. I swapped injector #4 with a spare new injector and it fired right up… shut it off, and it’s doing the exact same thing again. My guess was a bad connector or wiring to the pcm. So, I checked and the wiring is free of breaks, and connector at injector is good… what’s your opinion on this? Also, pcm connectors, and pins are all clean and making adequate contact.

[@user-lv5kq2my6q]

hi, your videos are super helpfull please dont stop!... im trying to diagnose a no crank start on my 2015 T590 i think im almost positive i have bad injectors but i think i also have low rail pressure and possibly no signal to injectors can youy please help with some diag tips.thanks in advance!!

[@tetradgroup]

I have multiple video's on testing injectors and troubleshooting no start conditions. If you still need help you can contact us at www.4tetradgroup.com

[@teknikal2]

Another great video. My T650 with the Doosan D24 never wants to start when it's cold out. When I say cold I mean below 50F. I have to prime it every time and start it right away. If below about 35F, I almost need another person to squeeze the primer while cranking, then it starts right away. I just put a new primer on it, thinking the check valve was leaking back, but that had no effect. When I prime, the bulb gets firm, then soft after a couple seconds. Not sure if that's normal or not. The primer will stay firm if I pinch off the return line from the injection pump, but I would not try to start it that way. If I keep squeezing the primer firmly (while return not pinched), I can faintly hear a hissing sound coming from pump or IMV. This seems logical that they would allow for a tiny amount of bypass so that air can be bled out easily. I'm wondering if the lift pump vanes are a little gummed up and sticking when it's cooler outside and not being very effective. I don't have any codes on the display.

[@tetradgroup]

Do the static test on the injectors and let me know what you find. It's normal for the primer bulb to soften up after priming. Also check the screen on the IMV for contamination. It could also be the low pressure relief in the pump bypassing. Either way start with the static test.

[@jasonrandall8932]

Hi i have a question regarding this pump - i have no start and code regarding low fuel rail pressure i have tested IMV valve and thats working as i should - i have hand pumped the premier bulb but its not going hard after 20 pumps - should it go hard ? or is there something im missing ? Im thinking injector but should the primer pump still go hard ?

[@victorhernandez769]

Please how to timing the pressure pump thank you...

[@lewislifeoutdoors5189]

This is a great video! Have been working for Bobcat as technician for last 8 years, have been a technician for going on 20years have been to several schools, the video you made is awesome! I am dabbling a little with KZbin myself. I dont have time to edit my videos, mine are all live! I would love to mention you in some of my videos?

[@boycotatlanta]

Hi lewis Do you have idea where can I buy the bobcat T770 diagnostic software?

[@boycotatlanta]

Hi Lewis Do you have idea where can I buy the bobcat T770 diagnostic software ? I'm in Georgia

[@tetradgroup]

That is awesome! Thanks!

[@MHolt3573]

What cuts the fuel off to the engine when you turn the key off on these common rail engines? I know on the older "mechanical" engines they have the fuel stop solenoid.

[@thepsychonaut6919]

You CAN buy the sensor without the rail, but you must order it directly from the manufacturer “Thomas Group/Delphi” in the UK:) Takes 1-2 weeks to arrive here in Florida.

[@brandioary7287]

I have a 2019 Bobcat T770 skid steer that will not stay running we have had 1 mechanic tell us that we need a new fuel injection pump but we’ve also had another mechanic tell us no we do not the machine will crank up but it will not stay running for very long a few minutes tops and then it shuts off and you have to squeeze the prime ball in your opinion do you think that if it is the pump it would crank it all

[@tetradgroup]

In my opinion I would say no but I'm not the person there troubleshooting the machine.

[@leinadalan]

These damn doosans!!!

[@johnkurdle8535]

Hey, great video. I'm only getting 1.5 volts to my IMV valve what should that tell me?

[@tetradgroup]

Make sure you check to battery ground and not terminal ground. White wire to batt ground should be 12v. If not start with fuse #21

[@ronniecolle2653]

I have 12.5v on the white wire to the imv and 10.5v on the black wire to the imv. Is the black or white supposed to be ground? I went through the whole harness and found some bad wiring and repaired.

[@tetradgroup]

White wire is good but black wire is PWM from ECU so hard to check for voltage. What are the symptoms?

[@davisgravel1648]

Totaly unrelated question here, i have a bobcat T740 track loader, just purchased from an auction, they had unplugged both swash plate sensors to put in limp mode, after plugging them back, runs for a while and shuts down with code, D7528, i have purchased a new swash plate sensor, my question is , does anything have to be calibrated when i change this sensor? Also i did remove filters and check for any signs of metal in fluid, found no signs of metal and fluid looked clean, have new fluid and filters to change as well. Should i check anything else before changing this sensor? Any help would be greatly appreciated.

[@tetradgroup]

I'd have to check serial number but it's possible the swash plate bushings are worn out. They are plastic bushings and requires pump tear down to replace.

[@ellianaitzelorozco5769]

Hi . I did the static test in t550 2014 . Two injector was bad . Since before didn’t want to start just with little spray of started fluid. Well that how I did the static test . I chance the four injectors and the fuel lines . Well went I did that the machine started and few seconds later died . Since then I can’t get to started again. Could be fuel pump bad ???

[@tetradgroup]

For more a more individual and detailed response, please visit our website to contact us. www.4tetradgroup.com

[@yamahalowrider]

Great informative video, I have a Bobcat463 giving me starting issues. Takes a lot of cranks to run. Wont start sometime. But once starts runs like a champ. With this symptom do you think the pump would be to blame. Also will running the winter n summer diesel fuel conditioners regular basis to the tank will keep these systems in better shape.?

[@tetradgroup]

I would first do a compression test on the engine. Will it start with 15 seconds of glow plug?

[@yamahalowrider]

@@tetradgroup Thanks fr prompt reply. Never tried that long of glow. Tdy i removed the fuel lines off the top of fuel pump & upon cranking it doesnt shoot out any fuel, is that normal?

[@tetradgroup]

@@yamahalowrider was the fuel shut off open? Not sure if you have a solenoid or cable operated

[@yamahalowrider]

@@tetradgroup As far i know i dont have any fuel shut off valve. There is a big capacitor like looking 12v part right next to fuel pump, i am guessing thats the solenoid. I dont know how to test it.

[@yamahalowrider]

Also i checked the fuel tube inside the tank, i found there was no Pick up filter inside, just the open end tube..should i install a filter / one way valve inside.?

[@jamesa.5052]

I have S770 2014 and I would like to know if V3800 Kubota engine for bobcat machine has same fuel motor pump as Doolan engine?

[@tetradgroup]

The basic principles are the same but the Kubota uses the Denso system. The Doosan engine uses the Delphi system which is what this video covers. The Doosan engine is swapping over to the Bosch fuel system on the later engines.

[@victorhernandez769]

My pressure pump on a engine 2.4bobcat is leaking fuel in the outside cavity's how to check the pump please thank you

[@raymyers23]

I have a T630 that will not prime for some reason. Every time I squeeze the primer bulb it acts like it’s filling the filter then going to the pump, except when I squeeze the bulb about 10 times, it eventually gets firm then when I unscrew the water separator on the bottom of the filter it’s like all the squeezes I just did come out all at once like it’s not going through the pump. Any ideas? I’ve Already checked imv, fuel lines, fuel filter replaced, fuel pickup had a tiny bit of rust on it in certain spots so I cleaned with brake cleaner and blew off with air. New battery as well. Machine will crank off ether and stay running with no issues or codes until I turn off and try to restart then I get a low voltage code M0309

[@lawrencetoolrentalinc.7692]

I have a T550 bobcat with this pump that runs fine but wont shut off. How or what shuts of the fuel to stop the engine?

[@tetradgroup]

The ECU shuts the engine off electronically, it the engine continues to run then its getting fuel from an alternative source, oil from a bad turbo maybe?

[@brygearionbrygearion8078]

Hi I'm trying to install an injection pump on the v3307 motor. I can see the timing marks but after that I'm lost

[@victorhernandez769]

How to timing the high pressure pump..

[@rileyrush8965]

Can you have a bad pump, imv, or injector and have no codes?

[@juanhernandez-ps5ju]

I have a question working on a d34, replaced pump, injectors and fuel rail, once it cranks the metering valve closes and i wont get fuel to the injectors. Can anyone give my what else can i do. I gave no DTC's

[@tetradgroup]

How do you know the IMV closes? Unplug the fuel rail pressure sensor and try to start the engine, it won't start however it runs high pressure through the injectors and helps clean out any air that may be in the system after replacing everything. Plug the rail sensor back in and try to start. Might have to do that several times.

[@kylenash3525]

We stumbled upon your videos as our S650 just died. Bobcat says fuel pump needs replaced, looking at close to 5k after labor. We are looking at installing a reman pump ourselves. Is there any programming or coding we will need to do after? Thanks!

[@tetradgroup]

Just a pump? If pump is bad then injectors are probably bad as well. Something doesn't sound right.

[@kylenash3525]

@@tetradgroup not according to Bobcat, the pump physically broke. I would send a pic if I could figure out how. But yeah, our mechanic spoke with Bobcat and they said pump only, injectors should be fine

[@tetradgroup]

@@kylenash3525 interesting, I'd like to see that, send a picture to [e-mail]. No programming required for just a pump.

[@leinadalan]

Great vid! So how about getting me some of that software!!! 😜

[@tetradgroup]

Definitely working on it, I think everyone should have affordable access to software and drivers. Hopefully one day something will be available.

[@gustavomedina3484]

I have a pump that is leaking low pressure fuel through one of the bolts that fastens it to the engine, would you know why?

[@tetradgroup]

The case must be cracked I would think.

[@coleorth2467]

I've tried to call and text you a few times. I replaced the injection pump in my s650 and it solved my no start issue. I was wondering if you wanted to tear down my old pump for fun? You mentioned you might want to see it.

[@tetradgroup]

Glad that solved your issue, I would definitely like to have the pump for tear down. Did you not have to pay a core charge?

[@coleorth2467]

No I found a new in box pump on line no core.

[@roadsideservice2406]

👍

[@coleorth2467]

Hello, I've been having issues with my d24 s650 and we have talked a couple times. Crank no start unless I use ether. now it wont start at all. Frustrated I took it to dealer they said they were not getting fuel from the high pressure side of pump and it was most likely the injection pump. So I picked it up today and tore down the pump as you taught me. All looked good except for the low pressure relief valve had scoring on it. My guess it the vain pump charges to 86 psi in body and imv cavity, and that is enough to overcome the spring on the inlet side check valve of the high pressure pistons. Since I have scoring on the low pressure valve I'm not able to build enough pressure to fill the high pressure bore on intake stroke hence the pump putting out nothing. FYI before I tore this down I was squeezing the primer bulb and when it built pressure I could hear hissing in the injection pump. Probably bypassing the low pressure valve just by hand? What do you think of my diagnosis?

[@tetradgroup]

Very interesting, I'd love to have that pump for inspection. Did you get a new pump or did you just pick up the old one for inspection. If the vane pump is not damaged it should build enough pressure to feed the high pressure side. I guess it depends on how bad the scaring is on the low relief. Did you cycle the IMV valve? I do agree with your diagnosis however.

[@coleorth2467]

I have not bought a new pump yet, I will email you a picture of the valve.

[@tetradgroup]

@@coleorth2467 please do

[@coleorth2467]

Emailed you.

[@carlosbriones8685]

Thanks for your help, I'm not bobcat technician, but I'm working on my friend, some helper put gasoline on it, I removed the injectors and pump and to diagnose and find 3 broke injectors and pump broke, so my friend bought pump and injectors new, I flush all lines and diesel tank, put it back together with clean diesel and star perfect for 2 minutes and then die again and don't star again, and have a lot experience on big trucks but really I don't know what happen whit this bobcat, I hope you can help me. Is a 2015 s570, thanks

[@tetradgroup]

Any codes? I would pull the injectors and install upside down so tips pointing up and try to start and see if any injectors are firing.

[@carlosbriones8685]

No codes, ok I will do it and let you know what happens, thanks a lot

[@carlosbriones8685]

No firing, no spray, any suggestions? thanks!

[@joses.vallejo9646]

Hello I'M JOSE VALLEJO FROM CALIFORNIA I HAVE CUESTION. HOW REPLACE FUEL PUMP ON BOBCAT 640 dosan

[@jrac863]

Hey Brady just got off the phone with the guys over at Diesel Laptops and they claim to have all the software that bobcat has.He also told me all the software is able to calibrate and program the new delphi injectors.Do u know anything about this company?

[@tetradgroup]

That is correct, Diesel laptops does have the engine software but I have not confirmed they have the Bobcat machine side software however the engine software will code injectors. They also rent laptop's if you just need a one time repair.

[@victorhernandez769]

Please send me information about the software Diesel lop top.

[@brandonharringtons]

How bad can def fluid in diesel do to a t450

[@tetradgroup]

Complete fuel system usually

[@cristophersantiagomolina7349]

por favor ayudeme no acelera la maquina que puede ser le cambie los inyectores

[@tetradgroup]

Could be lots of things, fuel supply issue to bad fuel, low compression, turbo, I need more context on what the original issue was.

[@ryanhurley4871]

Major help! But I need help, I have a s570 that wouldn’t start, no codes. Called bobcat field tech. He said need whole system, due to pump failure. I pulled the pump and inspected just as you did, I see ZERO metal, no contaminants, etc. Could it fail with no signs?

[@tetradgroup]

It's unlikely. How does he know the pump failed?

[@ryanhurley4871]

@@tetradgroup he said it wouldn’t build rail pressure and there was metal. I have found no metal. And didn’t look like anything was Remove to check from metal all over

[@tetradgroup]

@@ryanhurley4871 just one bad injector can cause a low rail pressure issue, of course I'm not the one who diagnosed it but if you'd like to schedule an appointment to talk about it you can do so at www.4tetradgroup.com

[@user-ub2tg1kn8p]

I'm working on a 2016 Bobcat E35, It will not start on its own. A little shot of ether in the filter, it starts right up and runs great. But it will NOT restart on its own. Any ideas?

[@tetradgroup]

What engine does it have?

[@user-ub2tg1kn8p]

@@tetradgroup Doosan D18

[@user-ub2tg1kn8p]

We have the Diesel Laptop computer, no codes, pump pressure is 4000 psi, new injectors which we programmed by the computer. We also took out the squeeze primer bulb and put a little electric fuel pump in its place, no differencr so we put the squeeze ball back on it.

[@tetradgroup]

@@user-ub2tg1kn8p we can schedule a video call if you need some help at www.4tetradgroup.com

[@BS-ti7tt]

how do you time it

[@tetradgroup]

It depends on if it is a D24 or D34, but the instructions are in the service manual. For more specific instruction and help, please feel free to contact me through my website. www.4tetradgroup.com

[@victorhernandez769]

Did i have to timing the high pressure pump

[@tetradgroup]

Not necessarily, it's best to time it but not absolutely required

[@victorhernandez769]

How to timing the high pressure pump please thank you...

[@rogerfranco903]

To time a injection pump on s740 3.4 is it hard

[@tetradgroup]

Very easy

[@rogerfranco903]

Can you give me information how to do the job

[@tetradgroup]

@@rogerfranco903 I would need serial number due to different style pumps to describe the process. You can contact us @ www.4tetradgroup.com

[@rogerfranco903]

Ok I will thank you

[@BS-ti7tt]

i saw the video i understand why it needs to be timed but i can't find a video to show me how to time it;

[@tetradgroup]

The procedure should be in your service manual, if you need more help or information contact us a www.4tetradgroup.com

[@gustavomedina3484]

The engine works ok, but is leaking low pressure fuel

[@renegarcia5284]

I have a code p0254?

[@user-fr8ft3jl6l]

한국어 번역이있으면 부탁해요

[@tetradgroup]

죄송합니다, 지금은 아닙니다

[@user-ti7dw4ri6t]

Thanks!