I have my water pump connected to my tank, and supplying toilets and washing machine.
Question is, water in the toilet is brown, leading me to believe possibly some rust in water pump? The concern is that the brown water may stain clothing being washed in washing machine.

Can I lubricate the pump anywhere? And what can I use?
Also don’t want to use anything that will affect the laundry.
Can lubricate and run pump for a while before using washing machine again.

Thanks for any advice.