How to Clean Or Replace Vanes On A GPRO PRO20/PRO35 Fuel Transfer Pump

Here's a 10-step walkthrough on how to take out the vanes for replacement or cleaning on a PRO20/PRO35 fuel pump.

Here's 10 steps to clean or replace the vanes inside your PRO20/PRO35 fuel pump. Remember to wear properly fitting PPE when doing this task!

Turn off the pump and disconnect from power
Use a 9/16" hex wrench to remove the cover plate
Use a pair of pliers to remove the vanes (part numbers 133501-1, 133502-1) from the pump cavity.
Use an Allen key to remove the rotor and shaft key from the pump cavity. Be sure to not drop the vanes or shaft key into the pump cavity
Inspect the vanes and o-ring for wear, debris and damage. Replace if needed
If there is debris, clean the pump cavity and all components with a clean cloth
To reassemble, place the rotor, shaft key, and vanes in the cavity. Make sure the flat side of the vanes are oriented clockwise within the rotor.
Remove the o-ring and lightly coat it with grease
Re-insert the o-ring securely into its grooves
Bolt the cover plate back onto the housing. Ensure there are no gaps between the cover plate and the pump housing