Makita Jack Hammer Hm1307Cb Controller Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

                          15 - 20 minutes

Sections

Handle
3 steps
Power Supply Cord Removal
3 steps
Controller
6 steps

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BackMakita Small Breaker HM1307CB (2011)
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Introduction

Before you begin this repair, make sure that the jack hammer is completely powered down and unplugged.

As you perform this repair, take note of all the screws that have been sealed with threadlocker and be sure to clean them and reapply the same color threadlocker during reassembly.

What you need

Step 1

              Remove six screws from the handle

Remove the following screws:
Two Phillips screws
Four hex screws
These four hex screws are all held in place with threadlocker, and may take quite a bit of torque or even some heat to loosen.
During reassembly, clean the residual threadlocker from these screws, then reapply high-strength (red) threadlocker to each one before reinstalling.
If you aren’t sure how to apply threadlocker, refer to the next step in this guide.

Remove the following screws:

Two Phillips screws

Four hex screws

These four hex screws are all held in place with threadlocker, and may take quite a bit of torque or even some heat to loosen.

During reassembly, clean the residual threadlocker from these screws, then reapply high-strength (red) threadlocker to each one before reinstalling.

If you aren’t sure how to apply threadlocker, refer to the next step in this guide.

1024

Step 2

To reapply threadlocker:
First, clean the residual threadlocker from each of the screws with some cleaner/degreaser and a stiff brush.
Second, apply a couple drops of high-strength threadlocker to the screw sockets.
Finally, apply one or two drops of the same high-strength threadlocker to the tip of each screw and reinstall them.

To reapply threadlocker:

First, clean the residual threadlocker from each of the screws with some cleaner/degreaser and a stiff brush.

Second, apply a couple drops of high-strength threadlocker to the screw sockets.

Finally, apply one or two drops of the same high-strength threadlocker to the tip of each screw and reinstall them.

Step 3

              Remove the handle

Grab the handle and remove it from the jack hammer.

Grab the handle and remove it from the jack hammer.

Step 4

              Release the power supply cord

Remove the black Phillips screw from the strain relief plate.
Loosen the two silver Phillips screws that hold the stripped ends of the power cable in the green terminal on the controller. These screws do not need to be removed.

Remove the black Phillips screw from the strain relief plate.

Loosen the two silver Phillips screws that hold the stripped ends of the power cable in the green terminal on the controller. These screws do not need to be removed.

Step 5

Remove the strain relief plate.
During reassembly, hook the right edge of the strain relief plate under the lip to the right of the cord before pressing it into place and reinstalling the Phillips screw.

Remove the strain relief plate.

During reassembly, hook the right edge of the strain relief plate under the lip to the right of the cord before pressing it into place and reinstalling the Phillips screw.

Step 6

              Remove the power supply cord

Remove the power supply cord from the jack hammer.
As you remove the cord, note the position of the cord guard. During reassembly, make sure the collar of the cord guard fits back into its slot in the handle.
When reinserting the two exposed wire ends into the green terminal:
First, compress the wire ends so they are relatively flat.
Then, insert each wire end into the green terminal, noting the polarity of the cables: the black cable should go into the upper slot, and the white cable should go into the lower slot (as shown in the third photo of this step).
Finally, gently tighten the screws until the wires are secured.

Remove the power supply cord from the jack hammer.

As you remove the cord, note the position of the cord guard. During reassembly, make sure the collar of the cord guard fits back into its slot in the handle.

When reinserting the two exposed wire ends into the green terminal:

First, compress the wire ends so they are relatively flat.

Then, insert each wire end into the green terminal, noting the polarity of the cables: the black cable should go into the upper slot, and the white cable should go into the lower slot (as shown in the third photo of this step).

Finally, gently tighten the screws until the wires are secured.

Step 7

              Remove four screws from the controller cover

Remove the following screws:
Two Phillips
Two 3 mm hex
These two hex screws are held in place with threadlocker and may require quite a bit of torque to remove.
During reassembly, clean the residual threadlocker from these screws, then reapply high-strength (red) threadlocker to each one before reinstalling.

Two Phillips

Two 3 mm hex

These two hex screws are held in place with threadlocker and may require quite a bit of torque to remove.

Step 8

              Remove the controller cover

Remove the controller and its cover from the jack hammer.

Remove the controller and its cover from the jack hammer.

Step 9

              De-route the power switch

Use a pair of tweezers or pliers to remove the green rubber pin above the power switch at the bottom of the controller cover.

Use a pair of tweezers or pliers to remove the green rubber pin above the power switch at the bottom of the controller cover.

Step 10

Lift the power switch out of the controller cover and de-route the cables from the guide

Lift the power switch out of the controller cover and de-route the cables from the guide

Step 11

              Remove the controller from the controller cover

Pull the controller straight out of the controller cover.

Pull the controller straight out of the controller cover.

Step 12

              Transfer the power switch

Your replacement controller may not come with a power switch. If so, transfer the power switch from the original controller to the new one:
Unscrew the two Phillips screws on either side of the switch.
Reattach the cables from the new controller to the switch, making sure that they go back on the same sides you found them.
The white cable goes on the side labeled with the number 1.
The black cable goes on the side labeled with the number 3.

Your replacement controller may not come with a power switch. If so, transfer the power switch from the original controller to the new one:

Unscrew the two Phillips screws on either side of the switch.

Reattach the cables from the new controller to the switch, making sure that they go back on the same sides you found them.

The white cable goes on the side labeled with the number 1.

The black cable goes on the side labeled with the number 3.

To reassemble your device, follow these instructions in reverse order, taking note of any reassembly tips.

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                    Taylor Dixon

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