DEF filter location????

Smith772 · Nov 30, 2017

Trying to replace the DEF filter on a 2012 Hino 338. Can anyone tell me where it is located? I cant find anything that resembles this filter anywhere on the truck. Thanks for any help.....

BigStickJr · Nov 30, 2017

I believe a lot of them are in the def tank.
As soon as GreasyTShirt shows up you’ll have the exact answer.

greasytshirt · Nov 30, 2017

Directly behind the DEF tank is the dosing pump. The filter is hiding under a cap with a 27mm, 12 point head on it. You access it from underneath. You will get DEF in your armpit. Don't put any lubricant on the o-rings, just shove it firmly into the hole. Don't forget the butt plug, that gets stuck up in there too.

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Treadmill · Nov 30, 2017

greasytshirt said:
Directly behind the DEF tank is the dosing pump. The filter is hiding under a cap with a 27mm, 12 point head on it. You access it from underneath. You will get DEF in your armpit. Don't put any lubricant on the o-rings, just shove it firmly into the hole. Don't forget the butt plug, that gets stuck up in there too.

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So nicely put. Lol