Fuel pump treatment

4x4M38 · Post by **4x4M38** » Tue Jun 21, 2016 9:23 am

The recommendation for assembly is treating
diaphragms with kerosene. I am guessing
that assumes a fairly quick return to service.

For someone rebuilding the fuel pump then
putting it on a shelf for maybe months
before in service is that still valid?

Should a thin layer of motor oil be applied
instead? Maybe a canned chainsaw gas/oil
blend hopefully lacking ethanol?

Thanks!

southpw · Post by **southpw** » Tue Jun 21, 2016 10:11 am

I wondered the same thing when i rebuilt my dual pump. I ended up installing it dry.... Fingers crossed as its sitting on the shelf and will not get used for months.

Post by **wesk** » Tue Jun 21, 2016 10:24 am

TM 9-1828A Page 119 Para. 92 a (6) says "soak in kerosene or fuel oil". Neither will evaporate completely and both will leave an oil residue in the diaphragm. Should not be an issue.

4x4M38 · Post by **4x4M38** » Tue Jun 21, 2016 10:40 am

That is what I read Wes. Sounds good.

Fuel oil in 1950 was diesel or heating oil?

Post by **wesk** » Tue Jun 21, 2016 11:07 am

Either one. Today it would be #1 diesel

4x4M38 · Post by **4x4M38** » Tue Jun 21, 2016 11:40 am

Thanks Wes!