1" Minnie oil pump problem?

Hi, After having a new boiler built for my Minnie,and rebuilding it,I cant seem to get the oil pump to work when the forward/reverse lever is in neutral? When its fully forward or back its fine. Any ideas or is this how it is? Thanks

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Dunno about the Minnie, but my Allchin water pump drive is off the crankshaft. The lubricator drive is off the valve spindle so the ratchet stroke is altered by the position of the reversing lever. If the stroke were to be too small, the drive wouldn't pick up a new tooth. I can't see that being an issue as the engine won't run with the valve gear in that position anyway. As long as the pump works with the cut-off at a working position., that's OK.

Hey Clive, what do you mean by cut off? Yes.the pump works from the valve spindle and your correct what you say re.picking up the next tooth?

Please excuse my ignorance,so your saying as long as its working with the lever forward or reverse thats ok?

Thanks

Terry

Hi Terry; "cut-off " applies to the valve movement as adjusted by the reversing lever. Full movement gives steam admission for 100% of the piston stroke, (100% cut-off). Progressively less as the lever is moved towards mid-position. My point is that since the engine won't function at small cut-offs, say 25- 30% minimum, it doesn't need lubrication for that situation.

Clive

so if I push the lever forward I can just control with regulator and pump will work ok like that?

The only prob I have is when the regulator is shut the engine slows but doesnt stop completely unless I stop the flywheel manually?

What Clive said, as the reverser gets closer to neutral you will get progressively less movement of the valve rod and as that is what drives the lubricator you won't get enough movement of the arm to engage the next notch on the ratchet.

If your engine won't stop then your regulator is letting by

Is that something I could sort? Im an ex mechanic so used to lapping things in etc?

May need lapping or could simply be that the linkage is a bit short and not allowing the regulator to fully close or the puck is tight in the buckle so not able to seat well on the port face.

Hi Jason,how do I check for those please? The rod is ok for sure.How about the rest? Thanks for help BTW.

Terry

Edited By Terry Chapman on 03/06/2019 16:44:22