Table of Contents
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REF: Oiling & Lubrication
Aftermarket Sportster Oil Pumps
Pro-Flow
The Pro Flow oil pump for Sportsters was developed by Zippers according to Buz Buzzellie's Sportster Performance Handbook. 1)
Compact Cad/Cam design, made of 6061 aluminum, O-ring sealing throughout, modular construction and fits without engine or frame modifications.
These pumps are no longer in production. 2) There were two versions, one 3 stage and one 4 stage.
The 3-stage uses a gerotor stage for scavenging the cam chest.
Below there is a spur gear set that scavenge the sump, and at the bottom there is another gerotor stage that feeds the engine.
They also have an extra suction port into the spur gear stage, that port is plugged with and 1/8 NPT.
That port can be used if someone for example wants to connect the pump via external plumbing to the sump.
The 4 stage pumps has an additional 4th stage, which can be used to various things. Draining the rocker boxes, draining a turbo or whatever the engine builder wants.
3 stage shown below:
Top, gerotor stage that scavanges the cam chest.
Below , spur gear stage that scavenges the sump.
Bottom, gerotor stage that feeds the engine.
Pro Flow multi-stage oil pump. 3) | |
REPLACEMENT PARTS FOR PRO-FLOW SPORTSTER TYPE OIL PUMPS 4) | ||
721756 | Rebuild kit | For Sportster type Pro-Flow pumps. Contains all clips, keys, pins and O-rings needed for complete reassembly of the Pro-Flow Sportster style oil pump. |
721845 | Pro-Flow Main body | With gerotor set. |
721846 | Pro-Flow Scavenge section | With spur gears. |
721847 | Pro-Flow Feed section | With gerotor set for ZPN 721184 |
721848 | Pro-Flow Feed section | With gerotor set for ZPN 721183 |
721849 | Auxiliary section | With gerotor set for ZPN 721184 |
721850 | Pro-Flow Oil pump cover | |
721851 | Pro-Flow Drive shaft | Only for ZPN 721183 |
721852 | Pro-Flow Drive shaft | Only for ZPN 721184 |
722121 | Dowel pins | For oil pump set ZPN 721183 and ZPN 721184 |
722069 | Mounting bolts | For ZPN 721183 |
722139 | Mounting bolts | For ZPN 721184 |