DescriptionThis video provides step-by-step repair instructions for replacing the front axle on a Troy-Bilt lawn mower (model 12AVB2RQ766). The most common reason for replacing this part is if the mower is not rolling properly.
All of the information for this replacement video is applicable to the following brands:
Troy-Bilt
Step-By-Step Instructions1
To replace the front axle assembly on your Troy Built lawn mower, you will need a 9/16 inch socket, a 3/8 inch socket, and a small flat head screwdriver.
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Before you begin the procedure, make sure the engine has cooled.
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We also recommend there be little or no fuel in the tank.
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For safety, detach the ignition coil wire from the spark plug to prevent the engine from accidentally starting.
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Now, tip the lawn mower back and use a weight to hold the handle assembly down.
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Using the 9/16 inch socket, unthread the nuts securing the two front wheels.
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Slide off the two drive gears along with the wheel guards.
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Now use the 3/8 inch socket to unthread the seven lower screws securing the front transmission cover.
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Next, unthread the two upper screws securing the cover.
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Pull the wheel adjustment lever outwards so you can fully detach the cover.
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Remove the two drive shaft bearings.
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You can now slide the old front axle assembly off.
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To prepare the new front axle assembly for installation, transfer the wheel adjustment lever handle from the old assembly to the new one.
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You can use the small flathead screwdriver to help do this.
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Align the new assembly on the transmission support.
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Slide the two drive shaft bearings onto the axle and fully insert them into the axle plates.
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Make sure the bearings are positioned in the notches in the support.
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Hold the axle assembly in place as you reposition the front transmission cover by first inserting the tab under the belt slot in the deck.
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Make sure the drive cable is positioned in the notch in the cover.
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Pull the wheel adjustment lever outward to properly align the front of the cover.
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Replace the nine screws to secure the cover.
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Starting with the lower middle screw, reposition the wheel guards followed by the two drive gears.
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Align the two front wheels and thread the nuts to secure them.
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Remove the weight and return the lawn mower to its upright position.
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Reattach the ignition coil wire to the spark plug.
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Refill the fuel tank if necessary and your lawn mower should be ready for use.