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Instructions for installing Marmox manhole covers in conjunction with the T – Tool


1. The frame must be installed fully supported on the manhole enclosure topping surface without any free unsupported projections inside the free opening.

2. Protect the metal nut fixed in the frame to receive the lock from any dirt or material waste.
Installation Instructions
3. Use tapered installation guide tool to ensure accurate alignment and verticality of the screw and nut holes.

4. Use any greasing material to coat the screw so that it will be unscrewed easily for maintenance.
Installation Instructions
5. To lock the cover to the frame be sure that the lock holes are accurately aligned together and use the screwing T-tool until the screw head is fully flush with the cover top surface.

6. Use the same T-tool for unlocking when needed.
Installation Instructions
7. To left up the cover use the screw side of the T-tool and screw it in the metal nut fixed at cover bottom and pull up the cover from the frame.

8. Keep the T-tool tied to the cover to reinstall the cover in the frame after maintenance.
Installation Instructions

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