Bosch 36618 Drill Driver Teardown

Written By: Calvin
  • Comments: 7
Bosch 36618 Drill Driver Teardown

Difficulty

Moderate

Steps

10

Time Required

45 minutes - 2 hours

Introduction

Overview of how to take apart a Bosch 36618 cordless drill driver. I will be taking apart the drill and cleaning bits and pieces as I go. I am not fixing or repairing any particular part of the drill. I hope you find this guide helpful!

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    • Remove the battery before any disassembly.

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

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    • 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.

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    • 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.

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    • 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.

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    • 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.

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    • 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.

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    • 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.

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    • 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.

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    • Insert wisdom here.

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    • 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!

    Hi, I have the exact same drill Bosch 36618. I decided to pull it apart and give it a good clean. I pulled the gearbox apart but I can't remember how to put it back in the right order. Any exploded view of the gearbox would sure help, thanks

    Phil Brown -

    @wattacam , I don’t own this drill anymore (wrote this teardown 5 years ago) so I wish I could be more help, but good all I can say is good luck!

    Calvin -

Author

Calvin

Member since: 16/02/15

290 Reputation

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 -

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 -

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 -

@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 -