What kind / weight of oil do I put in a Red Devil 5410 Paint Shaker?

It sounds like there may be an issue with the shaker mechanism on your 5990 Red Devil shaker. Here are some troubleshooting steps you can try:
Check the shaker arm: Make sure that the shaker arm is not stuck or obstructed and is able to move freely.
Check the shaker mechanism: Inspect the shaker mechanism for any visible damage or debris that may be causing it to stop functioning properly.
Check the motor: Make sure that the motor is functioning properly and is not overheated. If the motor is not functioning properly, it could be causing the shaker mechanism to stop.
Check the power supply: Make sure that the power supply to the shaker is functioning properly and that the unit is receiving an adequate power supply.
If these troubleshooting steps do not resolve the issue, it is possible that there is a problem with the shaker mechanism itself or another internal component of the unit. In this case, it may be necessary to have the shaker repaired or serviced by a professional.

There are two different belts that have come on this machine, it depends on the year and the electrical rating. One is a round orange polyurethane belt, and the other is a v belt. You can buy them from industrialpaintmachinery.com

industrialpaintmachinery.com

Your best bet is to get the mechanical timer kit. It eliminates the problems with the old circuit board style timer, by making it all much simpler.

30 weight non detergent

What was the function of the parts that you lost?

If it is new, return it to the store for another. Let them fix it.

any motor oil.

just the angle of the hit, not the weight of the item, granted a very light wieght item is less likely to cause damage but a large spoon hitting at the proper angle can cause this i know i was the one that did it
time for the touchup paint