I HAVE RASCAL 235 SCOOTER A LOUD SCREECHING NOISE COMES FROM THE BRAKE AREA IT IS INTERMITENT

WHY is this under "sewing?"

noise when applying the park brake indicates metal to metal on the brake pads ( no brake linings )
Check out that area first before spending money on anything else
To get an exact diagnosis of the problem and to get a quote for the repairs, find an accredited brake specialist shop ( preferably one with Renault experience) and make an informed decision from that

Sounds like one of them has incorrect values. You need to check the resistance marked on the original speed and throttle pots, with the new ones. Generally a throttle pot is 5Kohms and 20 or 200 ohms for the speed pot.

It is the same as a Rascal 600 only the 300 has smaller wheels.
The manual is not much help on the brake, it does not go into repairing the bake, except for checking voltages and replacing the microswitch, some tips are a little oil on the detent balls help to keep it free and movable, but don't get oil on the brake pad.

Scooter Doctor App

I’m happy to assist further over the phone at https://www.6ya.com/expert/bill_bcbb89783b08c489

have the electric control units cables realigned and if this doesnt work have them replaced

Bad belt or belt tensioner. Shut it off and look underneath for problems.

Obtaining a 4-wheeled front section is the best way to improve stability. The 3-wheeled front section on rascal 235 and 245 scooters easily detaches and interchanges with the 4-wheeled front sections(235 models are a little shorter (less legroom).

most rascal 235 and 245 scooters come equiped with power seat height control. you turn the key to the left and then the throttle lever becomes the seat height controller. the seat motor is ditectly uuder front of seat post. if it will not run follow wires to see that they are plugged up good.

sounds like a bad clutch. check the transmission out for ware and inspect the clutch as well. make sure the brake is not dragging as well.

I have the same problem...during SPIN it make a LOUD SCREECHING sound.