DD15 wont fire after fuel filters changed.

Usually when mines being stubborn to prime ill keep it running on ether until the fuel pump turns enough to prime the system. Usually 10-15 seconds. If you spray just enough to keep it running it shouldn't damage anything.

 

I pop the boot right before the turbo and spray it in there. Wd 40 or the like is safer, but you need 2 people to turn the key and spray simultaneously whereas with ether you can spray and then go turn the key

 

Fill the separator and leave the cap off, then pump the primer. If the level doesn’t drop your primer is bad or you have a restriction.
If it does drop, then pump it down and refill two or three times before trying to start.

 

Get you some good starting fluid instead of brake cleaner. If you have a John deere dealer close by get some of theirs.

 

Shut off valve open?

 

One of the plastic caps is cracked/not sealing or O-ring on filter is missing.

 

I had to change a filter on the road due to algae. Our mechanic told me to apply a small amount of air through the fuel tank vent hose. I pumped primer maybe 50 times then tried it the dd15 fired right up . After I slowly opened tank cap to release pressure.