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Repair Center  How to Replace the Brush Holder on a Makita Cordless Hammer Drill (Model LXPH01)

Why Read This Article?

Finish Nailer Repair - Replacing the Driver Guide (Ridgid Part # 79004001022)

Article Breakdown

Finish Nailer Repair - Replacing the Driver Guide (Ridgid Part # 79004001022)

Video

Tools & Materials

Fix Factor: Easy Duration: 20 minutes Frequency: As necessary Tools Required: Torx driver, Phillip's screwdriver, long-nosed pliers, small screwdriver Part #: 638494-5

How to Replace the Brush Holder on a Makita Cordless Hammer Drill (Model LXPH01)

Finish Nailer Repair - Replacing the Driver Guide (Ridgid Part # 79004001022)
How to replace the motor brush card holder on a Makita drill The Facts

Brush holder hammered? It's time to face the fix. Whether you are a master carpenter or an occasional drill-seeker, eReplacementParts.com provides the parts, procedures and facts you need to fearlessly fix what fails you.

The brush holder on your Makita cordless drill is an assembly consisting of two metal brush holders, a plastic card that they are attached to, two brush springs, and a couple of wire leads.

The assembly holds the carbon motor brushes at the proper location on the armature, allowing them to transfer electricity to it. The brush springs apply tension to the brushes, ensuring constant contact with the armature. The wire leads provide electricity (from the switch) to the brush holders.

Typically, the brush holder assembly only needs to be replaced if the drill's motor has been overheated. Excess heat can melt or warp the plastic brush card. The brush springs, if overheated, will lose their tension. Look for signs of melted plastic or discolored brush spring wires.

This article provides step-by-step instructions for removing and installing the brush holder on a Makita cordless hammer drill.

Let's get started. The Fix   REMOVING THE BRUSH HOLDER [top] 1. Remove the battery.

Remove the battery from the drill.

Remove the battery

 

 

  2. Remove the rear cover.

Remove the (2) screws.

Remove the screws

 

 

Remove the rear cover from the drill.

Remove the rear cover

 

 

  3. Split the housings.

Remove the screws from the top half of the housing.

Remove the screws

 

 

Lift the top half of the housing away from the unit.

Remove the housing cover

 

 

  4. Remove the motor brushes.

Use long-nosed pliers to retract the brush spring from the back of the motor brush.

Pull the spring back

 

 

Use a small screwdriver to disengage (pry) the brush clip from the brush holder.

Pull the retaining clip

 

 

Slide the carbon brush out of the brush holder.

Remove the motor brush

 

 

Repeat this step to remove the second motor brush.

Repeat on second brush

 

 

  5. Remove the motor and gear assembly from the housing.

Partially lift (pry) the heat sink away from the motor.

Lift the heat sink slightly

 

 

Lift the motor and gear assembly (as a single unit) slightly out of the housing.

Lift the motor

 

 

Disengage the brush card from the armature assembly.

Remove the brush card

 

 

Remove the speed-change lever from the motor and gear assembly. (Be careful not to lose the two springs situated inside the speed-change lever.)

Remove the lever

 

 

  6. Remove the brush holder.

Lift the switch assembly out of the housing.

 Lift the switch

 

 

Note the location of the wires prior to disassembly.

 Note the wires

 

 

Disconnect the (2) brush holder wires from the switch assembly.

 Pull the wires

 

 

Remove the brush holder from the unit.

 Remove the brush card

 

 

  INSTALLING THE NEW BRUSH HOLDER [top] 7. Install the brush holder.

Connect the (red) wire (on the new brush holder) to the (M1) terminal on the switch.

 Connect the red wire

 

 

Connect the (black) wire (on the new brush holder) to the (M2) terminal on the switch.

 Connect the black wire

 

 

  REASSEMBLING THE UNIT [top] 8. Reinstall the switch.

Align the notch on the forward/reverse change lever with the post on the switch.

Align the switch

 

 

Install the switch (and F/R change lever) into the lower half of the housing.

Install the switch

 

 

Tuck the switch wires into the channels on the housing.

Tuck the wires

 

 

  9. Reinstall the motor and gear assembly.

The notch on the yoke unit is designed to engage the plastic tab on the lower half of the housing. Rotate the yoke unit (as necessary) to ensure alignment of these components.

Align the notch

 

 

Reinstall the brush card over the armature.

Install the brush card

 

 

Install the motor and gear assembly (as a single unit) into the lower half of the housing.

Install the motor

 

 

Manipulate the components (as necessary) until: 1) the notch on the yoke unit engages the tab on the housing; 2) the speed-selector switch is properly seated within the channels on the housing; and 3) the brush card is properly seated in the lower half of the housing.

Align all components

 

 

  10. Reinstall the heat-sink.

Install the heat-sink into the lower half of the housing.

Install the heat sink

 

 

Verify that the wires (extending from the heat-sink) are positioned on the switch-side of the plastic post (not on the motor-side).

Inspect the wires

 

 

  11. Reinstall the top half of the housing.

Inspect all of the wires for potential pinch-points; make adjustments as necessary.

Inspect the wires

 

 

Reinstall the top half of the housing.

Install the housing

 

 

Secure the housing with the screws.

Secure the housing

 

 

  12. Reinstall the motor brushes.

Retract the brush spring from the brush holder.

Pull the spring back

 

 

Install the motor brush into the brush holder.

Install the motor brush

 

 

Secure the brush clip to the brush holder.

Replace the clips

 

 

Reposition the brush spring onto the motor brush.

Replace the spring

 

 

Repeat this step to reinstall the second motor brush.

Repeat on second brush

 

 

  13. Reinstall the rear cover.

Install the rear cover.

Install the rear cover

 

 

Secure the rear cover with the (2) screws.

Secure the rear cover

 

 

  14. Reinstall the battery.

Install the battery.

Install the battery

  The Finish

As you just learned, fixing things yourself means more drilling with less billing. Hopefully, this article has restored your ability to drill holes without replacing your whole drill. And that's just the tip of the bit. Our online repair guides can help expand your skills far beyond drills; empowering you to face power tool problems whenever they arise; and to fearlessly fix whatever fails you.

Find your next fix here.   [top]

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