Replacing a broken toilet lever is not difficult. The Mansfield toilet lever is exactly the same as any other toilet lever. Because of the variety of sizes and flush mechanisms, you should take the old toilet lever with you when purchasing the replacement. Installing a toilet lever will depend on what type of flush system you have. Some levers will slide into a slot on the center flush valve, or you may have the standard flapper and chain.
Things You'll Need
Replacement toilet lever
Turn the water shutoff valve behind the toilet clockwise to shut off the water supply.
Remove the toilet lid and place it on a flat surface.
Lift the chain or raise the flush valve to flush the toilet and drain the water from the tank.
Remove the nut securing the toilet lever to the toilet tank with a pair of channel-lock pliers. You will need to turn the nut clockwise to remove it. Slide the nut off the arm of the lever and maneuver the lever away from the tank.
Take all the pieces of the toilet lever to a hardware store or home-improvement center. You will need to purchase a lever that is the same length as the broken lever.
Insert the arm of the new lever into the toilet tank until the handle is flush to the tank. If you have the flush valve instead of a flapper, slide the end of the toilet lever through the slot on the flush valve.
Slide the retaining nut over the toilet lever arm and tighten the nut until the it is hand tight. You will be turning the nut counter-clockwise to tighten the toilet-lever handle to the tank. Turn the nut another half turn with a pair of channel-lock pliers. If you have the flapper-flush design, attach the flapper chain to the end of the toilet lever.
Turn the water shutoff valve handle counter-clockwise to supply water to the tank. Allow the tank to fill and test the toilet lever operation by flushing the toilet. If the chain needs adjusting, unhook the chain from the lever and hook the chain higher or lower as necessary.