This Trigger switch has internal terminals, a locking mechanism for the trigger and a forward, reverse lever. It also includes 2 screws. This authentic Milwaukee replacement part is sold individually. Switches are commonly replaced parts in power tools. A switch handles all on/off and variable speed functions. They also have a role in electric breaking; they can momentarily reverse electrical polarity. Because switches use mechanical internals, they tend to degrade and wear out over time, eventually requiring replacement. Some common signs of a broken or failing switch are: The tool will not start when you use the switch, or it requires multiple tries to turn on, until eventually it refuses to start at all. The variable speed function and electric braking aren't working properly.
Troubleshooting
This part works with the following brands:
Milwaukee
This part works with the following products:
Electric Drill
Hammer Drill
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Customer Part Reviews
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4.9
Average Rating (out of 5):
★★★★★
★★★★★
(11 Reviews)
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★★★★★
★★★★★
great company
this part allowed me to get my high dollar drill working that saved me big bucks that for great service
Guest - April 26, 2019
Verified Purchase
★★★★★
★★★★★
great triger
worked good replaced old one its like a new drill again
Guest - April 1, 2020
Verified Purchase
★★★★★
★★★★★
Everything went smoothly.
Great service.
Guest - April 28, 2020
Verified Purchase
★★★★★
★★★★★
Worked as expected
Worked as expected
Guest - July 7, 2020
Verified Purchase
★★★★★
★★★★★
perfect part. just what I needed
Found my part quickly and the order was shipped fast. My hammer drill is back on the job.
Lee - October 20, 2020
Verified Purchase
★★★★★
★★★★★
Works perfectly!
The part was almost an exact duplicate of the original! Easy to install! Finally, my 1/2 Milwaukee hammer drill is back in service!!
FELIX - January 11, 2022
Verified Purchase
★★★★★
★★★★★
Easy to install
Easy and exactly what we needed to get the equipment running again.
Guest - February 2, 2022
Verified Purchase
★★★★★
★★★★★
Switch
Found the switch for an old drill, yeah
Guest - December 12, 2022
Verified Purchase
★★★★★
★★★★★
Fit lik it should.
Shipped fast.
Guest - December 17, 2022
Verified Purchase
★★★★★
★★★★★
I would recommend Hudson Hi-Fi to all
it was just what i needed
Guest - October 20, 2023
Verified Purchase
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Questions & Answers
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Main switch went out, fairly easy fix. decided that since i was fixing the switch and had it torn apart should replace the upper and lower brushes at the same time. Pretty straight forward to take apart and replace parts. I did take a picture of the different sides of the switch and made a schematic to make sure I put it back together
... Read moreright, just helps to make sure I don\'t have to tear it all apart again. I used a standard phillips, T-20 torx, and a little flat head screwdriver and small phillips (for the switch). You will need to remove the rear cushion on the handle, undo the phillips screws on the right side, the top and bottom torx screws on the right side (leave left side torx in place) from the front which removes the main case, leaving front case intact, there are a couple little rubber bumpers on the brushes (don\'t lose these) the switch wires are held in place by spring loaded clips in which you will need a small flat head screwdriver, use the screwdriver to move the clips and the wires will come out. the small phillips is for the power cord to switch connection. Assembly is pretty much in reverse order, you may have to play with the wires to get them to go where the are supposed to for reassembly, if the switch is not flat you will crush the wires and have to redo the job. Other than that fairly straight forward.
Removed the screws from the housings and separated them
Made up a wiring diagram
Removed the cord clamp
Removed the wires leads from the old switch and removed it
Wired the new switch
Screws the cord clamp back on
Made sure that all of the parts were in the correct spot
Screwed the housings togeth
... Read moreer
Disassembled drill, compared wiring of old switch with contact points on new switch and noted the differences. Pulled wires from old switch and inserted them into the new one, tested the fix and reassembled the drill.
1-remove cushion grip from rear of handle pry of with small screwdriver.
2-Remove all screws from handle top casing.
3- remove 2-screws retaining gear case to handle, ( do not remove other 2 gear case screws, keep gear case in position.
4- remove old switch disconnect leads using small pointed scriber to release spring l
... Read moreead retainers after diagraming connections.
5- install new switch as per your diagram. ensure switch leads do not prevent case closure.
6- replace handle top casing, install all screws do not fully tighten until handle is snapped in place.
7-replace cushion grip( snaps in place)
Trigger switch on drill stopped working. Got new one took apart handle, front of drill had to come off as well took picture of switch wired. , dissasembled put new switch in reassembled
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The Hammer drill would not switch off when released, had to unplug tool
Removed the housing screws on the side case, pry off the rear rubber hand insert to access last screw on top edge. Removed two front end Torx bolts on same side of case. Separated the half case to access switch. Noted the wire positions and replaced one by one. New switch installed, replaced case and screws. Tool did not work! I checked t
... Read morehe wiring to switch, it was the same as original. I then searched Google for tech bulletins and found the new switch is an UPGRADED SWITCH. It required different wiring positions which I found online. Rewired and reassembled it works great.
1-remove all screws
2-open case up and take picture of all placement of wires etc.
3- pull old wire off switch and place on new switch. Some wires need to have a pick inserted to release wire.
4-make sure all the wires are routed in the same spot.
5- put case on and tighten screws
1. Took apart body of drill. Four torx screws at head of drill. 5 Phillip\'s head screws along side of body. One of which hidden behind the rubber grip.
2. Unplugged wiring from trigger mechanism. Use needle nose pliers for this. Needed a fine needle to push down on the metal retentions to remove the plugs.
3. Checked
... Read morebrushes to make sure they\'re making contact and didnt need replacement.
Reassemble drill.
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Switch malfunction; kept running without pressing trigger
1. After disassembly and after receiving new switch, take out one wire at a time from the old switch and insert into new one.
2. The old wire has a tension catch which if pressed to the left with a stiff point will release it.
3. One connection at a time is easy to do.
4. Reassemble housing after setting switch in its cr
... Read moreadle.
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Model Cross Reference
This part works with the following models:
ERP Number: ERP10123676
Manufacturer Part Number: 23-66-1692
Hammer Drill
- 5378-21 (Serial 897d) 1/2-Inch Electric Hammer Drill Parts
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Stock Status
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.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
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Mail-In Recycling Rebate
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.
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