This is a complete, genuine replacement Makita gearbox. It is commonly found in newer Makita Lithium-Ion powered drills. The gearbox is a complete assembly, including the threaded spindle, selector collar, housings, and internal gears and bearings. The gearbox comes pre lubricated and sealed and is ready to install. This part is compatible with the Makita drills listed below, but it will not fit any other power tools.
Troubleshooting
This part works with the following brands:
Makita
This part works with the following products:
Cordless Drill
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Never received it, lost in transit but receive top notch customer service
Never received the part (lost in transit) and was credited back the cost, seems like a great company and will probably buy from them again when needed, customer service was spot on, thanks again!
Guest - June 3, 2019
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Remove the battery. Remove the LH thread chuck screw. Put the largest allen wrench in the chuck that will fit, (short end). Tighten chuck onto allen wrench. Make sure drill is in low gear and in the drill mode. Lay the drill down on your work table. Strike the long end of the allen wrench with a hammer to unscrew the chuck from the spindl
... Read moree (RH thread) and remove the chuck. Remove the screws from the housing and separate. Make note or take pictures where all of the parts are located. Remove the old gear assembly , and install the new one. Then assemble the drill in reverse order.
I pretty much followed the simple instructions on your web site. There was one nuance though. When you have removed all of the screws that hold the drill together, and you GENTLY pry it in half, you need to pay close attention to the orientation of the motor. It only goes back in one way. Mine had a red line on it that I think was suppos
... Read moreed to point to the right side (as when you are holding it by the handle normally) of the drill. The two halves won\'t go together if this motor orientation isn\'t correct.
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the hammer drill transmission failed. It would no longer turn the chuck.
1. disassembled the drill body by removing all of the side screws and the end cap screws (2) and the 4 screws that mount the transmission to the drill body
2. Lifted the motor and the transmission out of the body cases.
3. Separated the motor from the transmission
4. Removed the brush holder plate from the motor. I relea
... Read moresed the tension from one of the brushes to allow the motor to be easily separated from the brush holder plate.
5. Cleaned the motor with electrical component solvent spray. Motor commutator had quite a bit of dirt inside which limited the air flow through it
6. Reattached the motor to the transmission and installed the assembly in the case. This required an exceptional amount of patience and determination because it would not go back together as easily as it came apart.
7. Finally, reassembled the case/internals by returning all of the screws to their rightful locations.
8. All that remains to be done is to attach the chuck. It will not come free from the old transmission because the left-handed mounting screw is stuck. I am in the process of drilling/grinding the screw out. Have several hours into the chuck removal with no end in sight\\
9. The part that I ordered from was in pieces when it arrived about ten days late. I was able to figure out how to return all of the little gears to their appointed locations and get the rear cover back on. FEDEX was the carrier and after some nudging, they produced the damaged package. I think the driver was embarrassed because he dropped the package and left hurriedly.
10. Now I am in the final approach, using a small grinder to remove the remainder of the screw that wasn\'t drilled away. A problem has occurred with holding the chuck carrier shaft while I attempt to smack the chuck loose from it. If it weren\'t for the stuck chuck, replacing the broken transmission would have been straight forward.
1. Removed four screws holding gearbox to drill.
2. Removed two screws and rear cover of drill motor housing.
3. Removed eight screws in housing and removed top side, leaving motor and gearbox in place.
4. Note position of motor. Motor must be in precise position to reinstall housing.
5. Tipped up and removed gearb
... Read moreox.
6. Installed new gearbox.
7. Carefully repositioned internal parts, and reinstalled and fastened top housing, rear cover, and fastened gearbox.
8. Removed chuck retaining screw in old gearbox, attempted to remove chuck. Failed.
9. Smashed old gearbox with sledgehammer to access chuck shaft.
10. Attempted chuck removal again with chuck shaft in large machine vise. Failed.
11. Heated chuck shaft with acetylene torch until nicely smoking. Clamped shaft in vise, and finally removed the chuck with moderate force using an impact driver. Whew.
12. Installed chuck on new gearbox, and installed retainer screw with Locktight.
The project was problem free and fast with the exception of the chuck removal. It is like having a brand new tool with the new gearbox.
Removed gear assembly, and replaced. hard to describe but had a little trouble seating motor in housing, got it though. I would recommend this for a fix it kinda person, not for someone not mechanical.
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The keyless chuck broke along with second gear breaking as well.
1. Removed the battery.
2. Opened the drill casing by removing all screws.
3. Removed the gear assembly and the chuck as one unit.
4. Replaced with the assembled gearbox and the chuck.
5. Secured the casing.
6. Attached the battery.
7. Tested, worked just fine.
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This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
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Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
