Step 1. Gather Tools and Materials – Here is what you need:
- Blown out bumper plate – The kit is intended to repair a loose center bushing. It is not intended for new bumper plates or plates with damage to areas other than the center bushing. Don’t install the kit unless the bumper plate is otherwise headed to the garbage.
- Repair Kit – Make sure the screws are the correct length (see step 2)
- Barbell and Rack – To aid in installation of the repair kit
- 1/4″ Drill Bit
- Portable Drill
- 2 Short Drywall Screws – For aid in installation
- LocTite 290 Wicking Grade Threadlocker
- #2 Philips Screwdriver or Attachment for the Drill
- Hammer – To set the T-nuts
Step 2. Make sure the screws are the correct length
Pictured above, the screw on the right is correct, the one on the left is too short. Get the right length screws if you have the wrong ones in the kit. They should be the same length as the thickness of the center bushing. Screw type is 10-32 flat head Philips.
Step 3. Hang the bumper plate and a repair plate on a racked barbell. Repair plate countersinks need to face out.
Step 4. Drill the first hole – Hold the repair plate with 2 short drywall screws screwed right into the rubber through two of the three mounting holes. This will secure the repair plate while you drill. Drill a 1/4″ hole all the way through the bumper plate right through one of the mounting holes. Make sure the hole is cleared of all rubber debris.
Step 5. Install a T-nut and a screw. The T-nut goes in on the reverse side opposite the repair plate with the sharp teeth toward the rubber. You will have to set the T-nut with a hammer.
Hand tighten the first screw to maintain repair plate positioning.
Step 6. Install two more mounting screws – One at a time, remove a drywall screw, drill a 1/4″ through hole, clear the rubber debris, set a T-nut and hand tighten a mounting screw.
Step 7. Repeat the process on the other side installing the second repair plate. The opposite plate will be rotated about 60 degrees to clear the hardware of the first plate.
Step 8. Tighten up all the mounting screws to secure the loose center bushing to your satisfaction. It’s not necessary to bend the repair plates very much to get good results.
Step 9. Apply a drop of LocTite 290 wicking grade thredlocker to each T-nut where the mounting screw protrudes. It’s designed to flow into the threads where it will cure and lock them in place. Alternatively you can remove each screw, apply threadlocker, then re-install. Inspect often, and if a mounting screw loosens, take it out, clean it up, apply LocTite and re-tighten.