Step-by-Step Instructions to Replace a Stripped Cog and Upgrade to the Reinforced Version for Optimal OGO™ ORIGIN Performance
In 2024, it was brought to our attention that some OGO™ ORIGIN Compost Toilets were experiencing a critical failure during full-time use — specifically, a stripped cog within the agitation system. We immediately investigated and made design improvements, including reshaping the cog for a better fit on the drive shaft and increasing the glass fill in the nylon material.
While these updates reduced the issue, they did not fully eliminate it. Our engineering team has since taken the solution a step further, introducing a stainless-steel insert and upgrading to a higher-grade bolt. This enhanced design ensures long-term durability and reliable performance for all users.
If you own an OGO™ ORIGIN Compost Toilet and have experienced this issue, we sincerely apologize. Please contact our customer care team, and we’ll send you a replacement cog kit right away to get your unit back in operation.
Once you receive your kit, follow the installation guide below to correctly install the new reinforced cog system.
Recommended Tools:
Philips Screw Driver
Small Flat Screwdriver
Pliers
1/2"Deep Socket
Rubber Gloves (optional)
Remove and Clean Solids Bin
Begin by removing the solids bin from the unit. Dispose of the contents, then thoroughly rinse the bin to maintain a clean workspace. For safety and hygiene, we recommend wearing rubber gloves while handling the solid waste and compost mixture.
Know Before You Start
- If your cog is stripped: Contact us at sales@ogotoilet.com, or reach out to your authorized OGO™ ORIGIN distributor. We’ll promptly send you a replacement cog kit to restore full functionality. Your cog kit includes:
- Upgraded stainless steel bolts
- New seal
- Washers
- Reinforced stainless steel drive absorption plate
- Improved high-strength nylon cog
These enhanced components are designed to provide a durable, long-term upgrade for your agitation system.
Remove Old Cog
While securely holding the agitator from inside the bin, remove the bolt and washer from the exterior side. Take out both the old cog and the existing 1/4" x 1" #20 bolt. These parts must be fully replaced. The replacement bolt will appear similar, but features upgraded stainless steel for increased strength and greater resistance to pressure.
Remove Agitator and Disassemble
After removing the bolt, carefully pull the cog out by hand or with pliers. Lift the agitator out of the bin. Next, remove the white bushing and seal from the hex nut. To detach the seal from the bushing, use a small flathead screwdriver. The seal can be reused if handled gently; however, a replacement is included in your kit. Using a 3/8" wrench or pliers, remove the hex nut and set both the hex nut and bushing aside for reinstallation. With a screwdriver, remove the bolt from the agitator hub—this bolt should be discarded and replaced with the new one provided in your kit.
Reassembly of the Agitator
Once the new bolt is in place place the hex nut back on to the shaft of the bolt, tightening with pliers to secure. Reinstall the white bushing with out the seal onto the hex bolt. The seal will be placed on the exterior of the bin and pushed into place in the next step.
Install Agitator to the Bin
Position the reassembled agitator with the bushing inside the solids bin, aligning it with the drive shaft opening. Hold the agitator steady with one hand, then place the seal—ensuring it is oriented as shown—on the exterior side of the opening. Using a 1/2" deep socket, press the seal onto the hex bolt until it is firmly seated.
New Cog Attachment
With the seal fully seated on the hex nut, maintain a firm hold on the agitator. Align the new cog so the square recess is facing outward, and press it securely into position. Confirm that the orientation is correct before proceeding. Next, position the stainless steel absorption plate into the square recess, ensuring it aligns with the hex nut. The plate will only fit one way and will drop into place once properly aligned, seating fully onto the hex bolt. Place the washer on top of the plate, then use the new 1/2" bolt to fasten and secure the cog.
Check and Ready
After securing the new cog to the agitator, verify that it is properly mounted. Ensure the agitator spins freely within the solids bin. Once confirmed, return the solids bin to the unit. Press the power button to check that the agitator rotates smoothly. Add a fresh layer of composting medium to the bin. Press the power button again to confirm effective mixing. Your OGO™ ORIGIN is now operational and ready for use. If you encounter any difficulties, please contact us—our support team is ready to assist you promptly.
