Introduction
Follow this guide to replace the pulley on a 2017 Toro Stump Grinder SGR-13 model 22615HD.
Tools
Parts
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            Grab the plastic housing at the end of the spark plug wire. 
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            Pull firmly to disconnect the wire from the spark plug. 
 
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            Use a 14 mm socket to remove the fasteners securing the belt guard: 
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            One 10 mm bolt 
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            One 10 mm nut 
 
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            Use a 9/16 inch socket to loosen the four nuts securing the bottom of the motor enough to allow the motor to slide freely. Do not remove the nuts. 
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            Use a 1/2 inch wrench in combination with the socket wrench to hold the bolts in place. 
 
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            Use a 1/2 inch wrench to loosen the two bolts behind the centrifugal clutch enough to allow the motor to slide freely. Do not remove the bolts. 
 
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            Wrap a piece of tape around the upper half of the tensioner bolt to mark the location of the second nut. 
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            Use a 9/16 inch wrench to loosen the nut on the lower half of the tensioner bolt until the motor can slide forward as much as possible. 
 
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            Lift the drive belt up and away from the machine while rolling it towards the cutter head to gradually roll it off of the pulley. 
 
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            Use a universal puller to remove the pulley from the cutter wheel shaft: 
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            Attach the universal puller to the pulley using the three bolts provided on the pulley. 
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            Use a wrench to torque down the center screw to slowly loosen the pulley. 
 
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To reassemble your device, follow these instructions in reverse order.