m939 series fuel filter question

[old mack man]

i have a 1990 m923a2 cargo truck fuel filter under fender next to air intake pipe will not drain when i open petcock any tips also if you know filter number

 

[simp5782]

Check the sticky for the parts reference catalog in relation to the number. More than likely its stopped up. Just unbolt it and drain it. It happens.

 

[Ue413]

I would take the whole canister off and clean. Fill it up with diesel when you restart.

 

[74M35A2]

Open the drain at the bottom, and then depress the Schrader valve at the top to allow air in, and it will drain just fine.

 

[D6c]

If it's anything like mine it's in need of a good cleaning. Take it off and clean out all the rust in the bottom and replace the filter.

 

[74M35A2]

Yes, you should disassemble and clean if you never have. If you are just doing a water check, open the drain, and then depress the Schrader valve atop. It will do exactly what you are asking. It won't drain without doing this because of the fuel in the suction line.

 

[Csm Davis]

Open the drain at the bottom, and then depress the Schrader valve at the top to allow air in, and it will drain just fine.

Not all have the Schrader valve, some have a petcock on the line to let air in so the fluid will flow out the bottom.

 

[Stonepicker1]

I have the filters for sale in the classifieds. By the each or case of six. Search "New fuel filters for 5 ton"

 

[LONDOGGY]

M929 5 ton oil filter with petcock LFF8062 by luber finer

i have a 1990 m923a2 cargo truck fuel filter under fender next to air intake pipe will not drain when i open petcock any tips also if you know filter number

The filter is a LUBER FINER LFF8062

 

[74M35A2]

He probably found the filter, 3 years ago.