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PartSelect Number PS257470
The trunnion nut (also referred to as a power nut) is made of metal and sold individually. This nut is part of your trash compactor assembly. The trunnion nut has spiked edges and attaches to the side of the ram. When the power screw moves in a circular motion, it feeds through the nut, which pulls the ram down to compact the trash. Before beginning this repair, make sure your trash compactor is turned off. This is a genuine part that is sourced directly from the manufacturer.
This part works with the following brands: GE, Hotpoint & Kenmore.
If the drawer is stuck because the piston is in it, you will have to take the back off to lift the piston in order to remove the drawer.With the drawer out, tip the compactor on its back to easily maneuver the otherwise heavy piston. Working from the front remove the trunnion nut cover (two hex screws) and then the bad trunnion. You may need to move the front of the piston up or down to release the nut. Remove all the debris and wipe the shaft from old grease and debris. Grease the shaft with supplied grease. With the piston about 1/3 of the way down, screw the new trunnion nut until it touches the housing. Move the front of the piston up or down to seat the nut. Put the nut cover back on and screw it in position.The whole job took less than 30 minutes.
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The problem with this repair arises after you have removed the old trunion nut and you are trying to get the new one to seat into the narrow bracket that surrounds it and keeps it from turning. You can only screw the trunion nut on so far and then it runs into the edges of the bracket. I found that by aligning the new trunion nut at the proper angle and then jacking the compacting ram up a few inches with an automotive jack from the car, the trunion nut is forced into place and then you can put the facing bracket back on and you are done.
I actually pulled the entire motorized unit out of the case, not knowing what the problem was. I found that the old nylon trunnion nut was stripped. I ordered two replacement trunnion nuts in case the replacement stripped out also. (However, the manufacturer has replaced the old nylon nut with a threaded metal unit that should never strip so I goofed when I ordered 2. )I removed the nut retainer, cleaned off the main drive screw, applied the supplied grease to the drive screw and the new trunnion nut and then reassembled the compactor. In actuality I didn't need to remove the entire power unit and would have only needed to remove the back panel of the compactor to reach the nut retainer.
Removed broken plastic tunion nut and replaced with new aluminum die cast trunnion nut.
Considering this was the 4 trunnion nut (1 nylon and 2 metal) I have replaced - I am getting pretty good at fixing this lowley, poorly manufactured, poorly designed piece. I have replaced 2 transmission boxes and replaced the chain as well. I have had several great experiences with partselect.com - they are set up as a favorite in my web browser for a few reasons, great price, great delivery
The big problem was how to get to the drive since the ram was down in the compression stage. I was able to remove the two door hinge pins and with a bit of prying and movement was able to disengage the door lock and totally remove the door. That removal disclosed the broken nylon trunion nut. After digging out all of the compressed trash, I used a small car jack to raise the ram slightly and remove the nut holder and broken nut. In replacing the nut, I had to decide at what point in the ram travel to install the new nut. Realizing that at full compression the nut would be fully taken up on the screw, I raised the ram perhaps 1/4 to 1/2 inch to allow for play, and after greasing the screw well, tightened the nut all the way against the nut mount, and replaced the nut holder. After several test runs, I replaced the door. It works now. Note- the original nut was nylon which stripped and split. The replacment was metal, which should be better.
There are two threaded nuts that hold a shield around the trunnion gear. These must be removed and the stripped gear can be removed. Here was the key for me. The new Trunnion gear cannot be spun into place where it is flush to the scissor gear because the screw is not threaded completely, this is by design.After the trunnion gear is spun on as far as possible, you must lift the extended compactor head/scissor gear enough to move the trunnion gear flush against the body of the scissor gear. This is the only way to replace the cover over the trunnion gear. replace the threaded nuts, and the job is finished.Don't forget to lubricate the gear/screw.
Removed the trunnion hold down bracket using 5/16 nut driver. Slid strpped trunnion off screw shaft. Washed screw shaft with low odor mineral spirits to remove old grease. Applied grease supplied with order to threads in new trunnion and screw shaft. Screwed trunnion onto screw shaft until it reached trunnion housing. Aligned trunnion with trunnion housing and then turned screw shaft counter-clockwise until trunnion was seated. Replaced hold down bracket and that was it!
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