MorningBird said...
I want to make changing my diesel filters easier by installing a hand pump upstream of my secondary CAV filter. I find this filter a pain to fill up after changing and a pump up stream will make it easy to fill.
I have a new inline outboard hand pump which I could install. A mechanic mate said it should be fine as outboard fuel is more corrosive and damaging than diesel. Another blog had one person say the hand pump only lasted a year, another person said they had used one for 10 years with no problems.
Anybody had any experience of using these in line hand pumps intended for outboards on diesels?
Cheers
G'day John,
Cav filter mounts can be purchased with an inbuilt hand pump but are not cheap. Another idea is to instal a 12v inline pump up stream and use that only when bleeding.
You don't mention brand of motor so I'm guessing Kubota. The Kubota auxiliary driving the generator on my fishing vessel was a nightmare to bleed and I had the advantage of the tank being high enough that when the tank was full the level filled the cav filter by gravity, eventually. On a yacht the tanks are nearly always low mounted and I'm guessing your having trouble filling the cav filter. Once the filter is filled the hand lift pump on the motor should be sufficient to clear the air out of the remaining pipe. You may have to rotate the motor by hand slightly to get a better action with the lift pump. At times when desperate I have removed the needle valve stop cock and sucked the diesel through with a clear plastic tube.
Have not changed the filter on my new yacht yet, Volvo with a cav and the fuel tank in the keel. I would consider opening the bleed vent on the cav filter and with the fuel filler cap tight, apply air pressure to the diesel tank vent via a plastic tube and you blowing.
