Sanding belt stops when you start to sand

It sounds like the sand paper itself is slipping. There should be an adjustment to tighten the pressure on the sand paper itself.

I assume basic dust and dirt has been cleaned from the internal parts.

Usually printer holds these rubber rolls that are used for the paper intake. With time these rolls become hard and will stop working.
Either changing these items (if possible) or carefully sanding these might help to solve your issue. However sanding will only be a temporary solution and in the long run changing those intake rolls will be the only option.

The drive from the motor to the rollers is broken. You will have to replace that belt if available.

most belt sanders are simular,if you have right size belt,there should be a lever between the belt wheels,pull lever out,put belt on,then close lever,some also have adjusting knob,turn clockwise to tighting.

Initial sanding can be done with 100 or it will take you a year to sand it down. You can either use a power sprayer and have paint mixed to match, or use cans made by duplicolor ...You will never match the existing paint though because it changes with age...I use the larger cans when available (marked for "vans") You can use 400 wet paper between coats and if you want to get crazy, use 800 wet when finished. Wait a few weeks and use white compound, clean well, in another couple of weeks, use clear-coat, sand again and when fully cured (few more weeks) then wax. Never sand unless paint has dried for at least 24 hours...even when it looks and feels dry, it can roll, and damage everything you have done.

Look for plastic build up in the motor. Try to air blow motor and belt drive.

hayward S-180 filter takes 150lbs, S-210 takes 200lbs not familur with the S-200. To change sand you have to remove the vari flow valve on top. You can either unplumb the filter and roll it over on its side and try washing the sand out or try scooping it out upright. Whatever you do dont damage the laterals on the bottom of the filter. When refilling with sand you want to make sure all the laterals are undamaged and in the down position. I always fill the filter half full of water to keep the sand from damaging the laterals while re-filling the filter with sand. Make sure you use pool filter sand and not play sand!

Check and see if the pulleys on the sander are not glazed this somtimes will cause the belt to slip. Give them a good cleaning. If this does not help there is a good chance the spring on the belt tensioner is weak and need changed.

Hop this helps

Hi, Consult your user manual for the instructions to install a new belt.  Follow these instructions selectively to tighten the belt tension. Here they are....  
CHANGING DRIVE BELT


  Using a phillips head screwdriver, remove the two screws
in the center of the pulley cover.
  Remove the cover.
  Raise sanding belt to the vertical sanding position.
  Next, loosen the hex head set screw. Raising the motor
pulley releases the belt tension.
  Remove the old drive belt.
  Fit the new drive belt on the drive pulley first and then on
the motor pulley.
  Test belt tension by squeezing the belt with your fingers.
  Adjust the belt tension with the hex head set screw until
there is about 1/4 in. (6 mm) of give.
  Tighten the belt tension nut securely.
Note: Excessive tightness on the drive belt may cause
increased noise and overload the motor. Excessive
looseness on the drive belt may cause the drive belt to
fail prematurely and make a severe chattering noise.
  Using a phillips head screwdriver, reinstall the pulley cover
and the two phillips head screws. Tighten securely.


Good Luck!  Middles

Make sure to loosen the screw on the end of the mandrel. After removing the old sanding drum, gently roll the black rubber between your fingers to compress it slightly. The new sanding drum should slide right on and then tighten the screw.

MM85