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ToasterIQ2000 · 11-20-2004, 08:54 PM

I've run a couple of automotive pumps.
The first was from a fuel injected Audi. It was an inline, as apposed to submerged, pump -- maybe that old Audi had another pump in the tank. Didn't occour to me that it depended on the gasoline for lubrication of its' bearings and brushes. This was several years ago. As best I remember it ran near 2 months, intermitant, not always on computing. The brush-commutator junction corroded horribly & it got noisy before it siezed. I cut it open and can't remember if I took pictures then, or where they'd be now... I thought then that any pump that ran its' flow across the brushes would be unfit for water: current through water splits water into h2 + 02; sparks ignite; iterate... Big hindsight Duh there.
I ran a rig on a smaller unknown make / model pump from C&H surplus that my bro said looked exactly like the pump out of his wife's ~1990 Dodge Caravan. In tank submerged, for fuel injection. It was a multi-stage gear pump. I used sythetic gear oil in that loop and wow that combo was quiet! One day I accidentally pinched a hose while it was running and dang things get messy fast at 80-140 psi. Imploded the Nalgene water bottle resevior / pump housing on the suction side.
Whle I'm tallying my grand achievments here ... I know its' off topic ... but if any of you ever clean the old gear oil residue out of a oil -> copper -> water power supply housing with white gas while changing a fuse ... wait a very long time or refill it with oil before powering it up.

11-20-2004, 08:54 PM	#12
ToasterIQ2000 Cooling Neophyte Join Date: Oct 2004 Location: Gorky Island, WA USA Posts: 22	I've run a couple of automotive pumps. The first was from a fuel injected Audi. It was an inline, as apposed to submerged, pump -- maybe that old Audi had another pump in the tank. Didn't occour to me that it depended on the gasoline for lubrication of its' bearings and brushes. This was several years ago. As best I remember it ran near 2 months, intermitant, not always on computing. The brush-commutator junction corroded horribly & it got noisy before it siezed. I cut it open and can't remember if I took pictures then, or where they'd be now... I thought then that any pump that ran its' flow across the brushes would be unfit for water: current through water splits water into h2 + 02; sparks ignite; iterate... Big hindsight Duh there. I ran a rig on a smaller unknown make / model pump from C&H surplus that my bro said looked exactly like the pump out of his wife's ~1990 Dodge Caravan. In tank submerged, for fuel injection. It was a multi-stage gear pump. I used sythetic gear oil in that loop and wow that combo was quiet! One day I accidentally pinched a hose while it was running and dang things get messy fast at 80-140 psi. Imploded the Nalgene water bottle resevior / pump housing on the suction side. Whle I'm tallying my grand achievments here ... I know its' off topic ... but if any of you ever clean the old gear oil residue out of a oil -> copper -> water power supply housing with white gas while changing a fuse ... wait a very long time or refill it with oil before powering it up.