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Step 2: Install Driver Wheel
Prepare the parts as follows:
M4*12MM Inner Hex Screw * 2
M4*50MM Inner Hex Screw * 2
Tank Load-bearing Wheel * 2
Flange Bearing * 4
Copper Bush *2
Caterpillar Band *2
M4 Self-locking Nut * 2
M3 Hex Key Nickel Plated Allen Wrench *1
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