Repair/Rebuild of Tri Lobe Rotary Blower

Get a rebuild kit....and replace the parts necessary to return the blower to spec....

We already have the replacement components, however the clearance between the lobe tips and the casing has gone beyond the recommended range due to being in operation for a long period of time. I believe there will be some sort of rebuild/metal rebuild required to bring the clearances back in range.

You need to contact a machining company that can weld this up and machine it out to spec, depending on what type metal the case is made of, there are different methods....

https://americanroller.com/us/building-up-re-machining-journals/

How much wear are we talking about? Would it need welding or could you get away with plating some material on?

Contact a rebuilder.

Compressor Overhaul & Repair | Air Compressor Services®‎

Rotary Lobe Blowers - ThomasNet

Stop using worn out equipment. That is very dangerous.

Are the rotors worn on the ends of the lobes or on the lobes themselves.

If it is end wear,the housing and lobes can be machined to remove wear marks,and the rotors can be shimmed to attain proper clearance.Bushings may be required if wear is extreme.If the bearings have spun in the housing or on the rotor shaft,these will require metallizing, and or/ boring and bushing also.

This is a very precise machining operation,so do not trust it to just any local shop.

There may be other problems of which you are unaware,and the best way is to send it to to a rebuilder, as previously mentioned.

That guidance can be obtained by using the telephone to speak to the original equipment manufacturer's Technical Helpline, which is there specifically for this purpose. In the absence of the manufacturer's Operation and Maintenance Manual supplied with it, these details can be found by entering the manufacturer's name into any internet search engine.