It's been a few years now and since this video was posted I have had great luck with reusing these valves. Simply cleaning them with hot water and working the valve seat and spring with a thin pick is all it takes to get them back in working order.

No crappy music or needless intro! This help me solve my issue. Thank you and God bless you!

people, what he is talking about here is LODS (liquid only dosing system) also if any of the hard plastic lines from the tank to the pump or from the pump to the one box dozer nozzle and back to the pump are kinked (inner liner all jacked up) you can get pressure codes as well. keep the def tank clean. use GOOD def. there is a hydrometer (similar to coolant hydrometer) to measure the def concentration you need 32.5% concentrate. there are many things that can and do go wrong with the def system. good video.

Wow, you really do a great job of explaining things, thanks so much.

Do you have a video on replacing these leaking orings I keep hearing about? Its when the whole unit is usually covered

wicked good video.... just went to service that code... it minus 20c here in Alberta. I figured frozen up but didn't know where. I'm sure relief was stuck open. added warm def. ran unit. after that just like new. thanks 👌

I wish you would do a video on bleeding one of these pumps. The information you give in your videos is awesome and led me to replace the pump. It wasn't much more money than the kit you talked about. After I installed the pump the system wouldn't build pressure. I pulled a vacuum on the outlet of the pump until I got fluid but after that it was only building 106psi at 1600 rpm. I disconnected the supply to the doser and ran the pump until I got def and plugged it back in. I ran my test again and got the same specs as you. That worked for me but I couldn't find the proper procedure for bleeding the system. Thanks for your help.

I have a very similar pump on my bluebird visions with isb 6.7 and I’ve found the In tank filter getting sucked in the pick up tube setting code 6485 def pump percentage

What is the part number to replace the valve and screen and where can I get it?

Thank you for this info.

Respect for your information

Thanks, very helpful. We use DDDL. I think I will remove and clean the valve and if necessary put it in my ultrasonic cleaner.

Thanks for your videos. Where can I buy just the valve or what's the part number of it?

When replacing I think you're supposed to pressurize the def inlet to inflate the bladder before attaching the line. 90 psi for 3 seconds is what I've seen....

Have a code 4374 FMI 4 could this be fixed with this valve ??

hi folks, where can I get the plastic valve? What is the part number please.

Know anything about a 700r4 transmission ??

4374 fmi 0 came up right after I replaced the DEF pump.. any ideas?

Do you have the part number to this kit?

May I ask what kits part number for rs supplies kits to get the value ? I have 2016 freightliner cascadia ?