Medium
30-60 minutes
This is a genuine Makita replacement part that has been sourced from the original manufacturer and is intended to be used with cordless drills. The gear assembly links with the motor and the cuck. This item is used to regulate the drill\\\'s torque output. The gear assembly is priced as a single item.
Gear Assembly 127099-1
OEM part for: Makita
Part Number: 127099-1
$28.70
In Stock
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Compatibility
This part will fit the following 4 machines
Makita
DF330D 10.8V 3/8" Cordless Drill View Diagrams & Manuals
FD02W 12V max Lithium-Ion Cordless 3/8" Driver-Drill Kit View Diagrams & Manuals
DF330DW Screwdriver View Diagrams & Manuals
FD02ZW Drill View Diagrams & Manuals
This item works with the following types of products:
- Cordless Drill Parts
- Drill Parts
This part replaces obsolete part #: 123503-8, , 125539-3
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Broken gear shaft
Everett - June 1, 2017
👍 5 of 7 people found this instruction helpful
Tool Type
Cordless Drill
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Hobbist Magnifying glass, vise
Strong suggestion for everyone: Get as much info and diagrams as you can before starting! Pay CLOSE attention to how it comes apart, take photos if possible.
1. I removed the drill chuck with a 1/4 " blade screwdriver. Caution; REVERSE thread screw.
2. removed 6 housing screws and 2 retainer clips inside battery compartment.
3. Separated housing.
4. Photographed the reversing switch assy, then removed same.
5. Photographed and removed the speed switch (lost one of the two springs)..used spring from ball-point pen as replacement.
6. Using needle-nose pliers, disconnected motor wires.
7. Lifted motor and gear set out as one unit. (Make sure the clocking tab is not broken).
8. Separated motor and gear set.
9. Installed new Drill chuck onto new gear set.
10. CAREFULLY tighten drill chuck (nose down) into a vice, then remove the protective plastic plate from the gear-set. MAKE SURE the plate is on TOP, otherwise you may lose the gears.
11. install motor into gear set. you may need to wiggle the motor a bit to align the gears, and a twist will seat the motor properly.
12. Clock the unit with clocking tab toward the speed selector switch (top)
13. replace the drill chuck, gear set and motor into the housing as one unit.
14. Replace the motor wiring and reversing switch.
15 Replace the speed control. (This alone took me 30 minutes using needle-nose and mag. glass). Be patient, you'll get it.
16. Replace housing HAND tighten the screws.
1. I removed the drill chuck with a 1/4 " blade screwdriver. Caution; REVERSE thread screw.
2. removed 6 housing screws and 2 retainer clips inside battery compartment.
3. Separated housing.
4. Photographed the reversing switch assy, then removed same.
5. Photographed and removed the speed switch (lost one of the two springs)..used spring from ball-point pen as replacement.
6. Using needle-nose pliers, disconnected motor wires.
7. Lifted motor and gear set out as one unit. (Make sure the clocking tab is not broken).
8. Separated motor and gear set.
9. Installed new Drill chuck onto new gear set.
10. CAREFULLY tighten drill chuck (nose down) into a vice, then remove the protective plastic plate from the gear-set. MAKE SURE the plate is on TOP, otherwise you may lose the gears.
11. install motor into gear set. you may need to wiggle the motor a bit to align the gears, and a twist will seat the motor properly.
12. Clock the unit with clocking tab toward the speed selector switch (top)
13. replace the drill chuck, gear set and motor into the housing as one unit.
14. Replace the motor wiring and reversing switch.
15 Replace the speed control. (This alone took me 30 minutes using needle-nose and mag. glass). Be patient, you'll get it.
16. Replace housing HAND tighten the screws.
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All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
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