Feeling dumb, but why can't I find a handle for a manual fuel lift pump on my BD722? I have a Racor primary with a small manual pump on top, but it doesn't seem to push fuel to the bleed valve. Dont see a manual pump anywhere else. Do I not have one? Pic of my fuel pump attached.
Obviously Stanley/Farron will have better insight, but I believe we have the same setup on our D722s. Mine is an oldie but a goodie (believe build date is 1996 on mine) and doesnt have the hand priming lever on my mechanical fuel pump. I have an electric pump set up downstream of my racor/above the mechanical pump (the pressure that the electric pump generates isnt too strong as to damage the mechanical pump). It makes bleeding a breeze.
Cooper999 is quite correct. You have an engine that was built before Kubota put a manual priming lever on the lift pump.
You could use a low pressure electric pump to help with bleeding or use a primer bulb that we can supply. You can see this here www.betamarinenc.com/product/primer-bulb/
I have not found the manual pump that is on top of some of the Racor filters to be too effective.
So that explains it! Any risks or drawbacks of using the bulb primer? Seems like a simple solution. Where in the system is it added? Between primary filter and lift pump? Between lift pump and secondary? After secondary?
The primer bulb is cheap and works well. It may degrade over time forcing you to replace it in 10 or 15 years.
I would fit it between the tank and the primary (Racor) filter and this will then allow you to pump fuel through the system after you have changed filters.
There are hundreds of diesel installations that have primer bulbs fitted . Just use your common sense and install it away from the engine and you should be just fine.