My G8 has two oil pumps. One is the Pilgrim pump with sight glass on the timing case that pretty much takes care of itself, the other is the manual pump mounted on top of the tank. I know this one is to be used when giving the engine some beans or on a long, uphill slog. The good book also says that three or four pumps will also be sufficient to top up the sump when the old oil has been drained off.
My previous experience of these pumps is with a 1920s Francis Barnet. With that one when you pushed the pump down it sucked up a fill of oil which the spring return plunger then delivered to the engine in a slow feed. Pushing down this one, its not picking any oil up and gives no more than a derisory spit from the feed pipe.
Ive stripped it to makes sure that the leather cup washer is facing upwards and in good condition and also that the gland seal around the pump rod and the small ball bearing valve in the feed elbow are present.
What am I failing to see?
![Embarrassed :oops:](./images/smilies/icon_redface.gif)
The way its made suggests that the 'vacuum' created above the cup washer when its pushed down should pull oil past the cup and fill the barrel. Apart from a gauze strainer over the pump end, everyhing shown in the parts list is there.
Thanks in advance.
Steve