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Milwaukee Impact Wrench 9070-20 Rear Motor Bearing Replacement

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  1. Milwaukee Impact Wrench 9070-20 Rear Motor Bearing Replacement, Rear Motor Bearing: crwdns2935265:01crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Milwaukee Impact Wrench 9070-20 Rear Motor Bearing Replacement, Rear Motor Bearing: crwdns2935265:01crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Milwaukee Impact Wrench 9070-20 Rear Motor Bearing Replacement, Rear Motor Bearing: crwdns2935265:01crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Ensure that the device is unplugged from any power source to avoid electrical shock.

    • Flip the device, making the gray part face to the right.

    • Remove four 14mm screws using a T20 Torx screwdriver.

    • Remove four 18mm screws using a T20 Torx screwdriver.

  2. Milwaukee Impact Wrench 9070-20 Rear Motor Bearing Replacement: crwdns2935265:02crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Milwaukee Impact Wrench 9070-20 Rear Motor Bearing Replacement: crwdns2935265:02crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Milwaukee Impact Wrench 9070-20 Rear Motor Bearing Replacement: crwdns2935265:02crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Hold the device so the gearbox assembly faces directly towards you.

    • Remove the four screws using a T20 Torx screwdriver.

    • Using a plastic opening tool, pry the gearbox assembly away from the clam shell.

  3. Milwaukee Impact Wrench 9070-20 Rear Motor Bearing Replacement: crwdns2935265:03crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • After all necessary screws are removed, gently remove the upper red cover from the device.

    • Remove the gray motor and gearbox assembly.

    • Remove the gearbox gently as to not damage the brushes.

  4. Milwaukee Impact Wrench 9070-20 Rear Motor Bearing Replacement: crwdns2935265:04crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Milwaukee Impact Wrench 9070-20 Rear Motor Bearing Replacement: crwdns2935265:04crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Milwaukee Impact Wrench 9070-20 Rear Motor Bearing Replacement: crwdns2935265:04crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Attach a bearing removal tool to the bearing.

    • Tighten the bearing puller until the bearing comes off of the motor shaft.

    • For easier removal, lightly heat the bearing with a propane torch.

    • Heat and then press the replacement bearing onto the shaft.

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To reassemble your device, follow these instructions in reverse order.

Yuna Choi

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Embry-Riddle Aeronautical University, Team S13-G7, Lamothe Fall 2019 crwdns2935289:0Embry-Riddle Aeronautical University, Team S13-G7, Lamothe Fall 2019crwdne2935289:0

ERAU-LAMOTHE-F19S13G7

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