Positive displacement pump rust removal

[PFBlowerinstall]

I have a question regarding PD blower. Maybe someone can advise. I have a roots PD blower (616 dvj) I purchased new. The unit sat for a good year or so - covered with a tarp and now im needing to clean it up (Without taking it apart) any experience with this process. quickest methods that won’t harm the lobes

 

[Compositepro]

I would turn the rotors by hand to oil and make sure everything was free to rotate. Then spray oil into the inlet while running so that the oil suspends the rust dust and and carries it out the exhaust

 

[Angelina12]

Since it sat for a year, cleaning it without disassembling it requires a careful approach. Here’s a suggestions , that should be effective and gentle on the lobes. . 1. Use compressed air to blow off any dirt, dust, or debris from the blower, especially from the inlet and exhaust areas. This is an easy way to start without disassembling anything. 2. Once it’s clean, lubricate the moving parts with a light oil or lubricant recommended by the manufacturer to ensure smooth operation and prevent corrosion. By using these methods, you should be able to clean it up without damaging the lobes. Always avoid harsh chemicals or abrasive tools to ensure you don’t affect the performance of the blower.

 

[PFBlowerinstall]

.View attachment 3661

 

[PFBlowerinstall]

@Compositepro thank you! Yes the shaft does rotate freely by hand. What kind of oil would you recommend for rust removal?
It’s going to be hard to run the unit without it being connected to a power source. Turning it by hand is a chore.
Because of accessibly, I am currently soaking the lobes in Evapo-rust. The alternate method (using soaked paper towels and magnets to hold in place) The outside flanges cleaned up nice with some 120 grit.
Any other suggestions welcome. Thank you in advance