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Bosch 36618 Drill Driver Teardown

What you need

  1. Bosch 36618 Drill Driver Teardown, Preparing the Teardown: step 1, image 1 of 1
    • Remove the battery before any disassembly.

    • Prepare a workspace by having a clean, level surface and any required tools within reach.

  2. Bosch 36618 Drill Driver Teardown, Remove Exterior Screws: step 2, image 1 of 1
    • Remove the 11 T10 Torx screws from the exterior of the drill driver.

    • The screw circled in orange is recessed quite far and might not be reachable with certain T10 screwdrivers.

  3. Bosch 36618 Drill Driver Teardown, Split the Drill in Half: step 3, image 1 of 2 Bosch 36618 Drill Driver Teardown, Split the Drill in Half: step 3, image 2 of 2
    • After the 11 exterior screws are removed, pull the plastic housing pieces apart.

    • There are no tabs or plastic flaps holding the two pieces together. Pull straight up and the two pieces should separate easily.

    • Check out all that dust by the motor, that can't be efficient!

    • The second picture is a closer up shot the side with all the electronic goodies.

  4. Bosch 36618 Drill Driver Teardown, Remove the Motor and Chuck Assembly: step 4, image 1 of 3 Bosch 36618 Drill Driver Teardown, Remove the Motor and Chuck Assembly: step 4, image 2 of 3 Bosch 36618 Drill Driver Teardown, Remove the Motor and Chuck Assembly: step 4, image 3 of 3
    • The motor and chuck assembly can be pulled up and out.

    • Be aware of the speed selector (first picture) which is slotted onto the motor and chuck assembly as you remove it.

    • Remove the electrical connections. The colors are marked on the motor so no need to remember which side is which.

    • The electrical connections are spade terminals with a little locking piece on the front (non flat) side of the spade. Push the lock to the back and pull the connector straight out.

    • What's remaining is the motor and chuck assembly (third picture).

    • The chuck can be removed with a hex key, I didn't go that far in the disassembly.

  5. Bosch 36618 Drill Driver Teardown, Split the Motor and Chuck Assembly: step 5, image 1 of 3 Bosch 36618 Drill Driver Teardown, Split the Motor and Chuck Assembly: step 5, image 2 of 3 Bosch 36618 Drill Driver Teardown, Split the Motor and Chuck Assembly: step 5, image 3 of 3
    • The motor can be removed from the chuck assembly with a clockwise twist.

    • The two red boxes in the first picture depict where the separation will occur.

    • The second picture shows the connection on the chuck assembly side.

    • The third picture shows the connection on the motor side.

  6. Bosch 36618 Drill Driver Teardown, Remove Slide Plate: step 6, image 1 of 1
    • Remove the black plate on the motor by removing the two T15 Torx screws.

    • When reassembling, slotting the gear pictured to the left back into the chuck assembly can be finicky. Be patient and take your time.

  7. Bosch 36618 Drill Driver Teardown, Electrical Connections Detail: step 7, image 1 of 2 Bosch 36618 Drill Driver Teardown, Electrical Connections Detail: step 7, image 2 of 2
    • Here are some closeups of a few electrical connections.

    • Picture 1: connections to the trigger assembly.

    • Picture 2: connections on the rear of the battery receptacle.

  8. Bosch 36618 Drill Driver Teardown, Miscellaneous Closeups: step 8, image 1 of 2 Bosch 36618 Drill Driver Teardown, Miscellaneous Closeups: step 8, image 2 of 2
    • Picture 1: closeup of the forward, revers, and lockout assembly.

    • Picture 2: be cautious of this spring behind the battery receptacle, it likes to fall out.

  9. Bosch 36618 Drill Driver Teardown, A Few More Closeups: step 9, image 1 of 2 Bosch 36618 Drill Driver Teardown, A Few More Closeups: step 9, image 2 of 2
    • Insert wisdom here.

  10. Bosch 36618 Drill Driver Teardown, Reassembly: step 10, image 1 of 3 Bosch 36618 Drill Driver Teardown, Reassembly: step 10, image 2 of 3 Bosch 36618 Drill Driver Teardown, Reassembly: step 10, image 3 of 3
    • Here's the thoroughly cleaned and fully reassembled drill. No extra pieces, yay!

    • Picture 2. I relabeled the torque ring with Sharpie so that the markings were legible again.

    • Look at all that dust and particulates that were gunking up the drill! I'm sure the drill driver will operate more smoother and efficiently now.

    • Thanks for looking at my teardown! Happy fixing!

Finish Line

2 other people completed this guide.

Calvin

Member since: 02/15/15

290 Reputation

1 Guide authored

5 Comments

In order to replace the gearbox (part 2606200263) for new one, you must remove the chuck. I tried to but was not able. After removing the screw inside the chuck, I tried to unscrew the chuck counter clockwise without result. Do you have the trick?

Dionne - Reply

Dionne,

I’m sorry I do not have any special tips or tricks, only what’s in the guide. Maybe if I would’ve seen your question four years ago I would’ve remembered more about taking this thing apart, good luck though!

Calvin -

Curious question: Why do all Bosch promotional pictures of drills always show only a right-side side-view? (see Google images)

ITTF_equals TenFPS - Reply

Thanks Calvin for taking the time to post this. The pictures and notes were excellant. I have a question more than a comment. Does the Bosch 36618 have carbon brushes? And if so, where should I start looking for them. My old 36618 all of a sudden is hesitant to start and then has sparatic speed when the trigger is pressed.

Mike Materne - Reply

@mmaterne Im pretty sure it has carbon brushes. I don’t remember explicitly since it was so long ago, but by looking at the po tires, since two wires go into the motor it’s gotta be a DC motor and I don’t know any other to use to wires with a DC motor other than brushes. And carbon is the main material type for brushes, so carbon brushes should be good for you.

Carbon brushes can be bought at a local hardware store like Ace or DoIt Best or TruValue or Menards or Home Depot, or here’s an Amazon link: Carbon Brushes Compatible for Makita Cb154, Motor Carbon Brush Set Replaces Makita 194986 Power Tools (2 Packs) https://www.amazon.com/dp/B07Q6D1SDJ/ref...

This Amazon link is just an example, these ARE NOT THE EXACT BRISHES NEEDED FOR THE DRILL.

Calvin -

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