Fixing a Miter Saw
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- Опубликовано: 4 июн 2019
- Troubleshooting and repairing a broken Dewalt DW705 miter saw. Cleaning and inspecting the motor, wires, brushes, and switch. Testing the switch with a multimeter and replacing the brush holders. See the links below for the parts and tools I used:
Brush Holder with Brush (x2):
amzn.to/2R0mceV (affiliate*)
Brushes only (if your brush holders are good):
amzn.to/3vx6pWY (affiliate*)
Miter Saw Switch (requires minor handle mod to fit):
amzn.to/2JrUoM7 (affiliate*)
Miter Saw Switch (to be used with new handle below):
amzn.to/3dTiayK (affiliate*)
Miter Saw Handle (to be used with new switch above):
amzn.to/2UNR2sd (affiliate*)
Switch/Handle Kit:
amzn.to/3aAkloH (affiliate*)
Multimeter:
amzn.to/2UNMDFy (affiliate*)
Milwaukee Drill & Driver:
amzn.to/2UNNUMZ (affiliate*)
Milwaukee Stick Light:
amzn.to/33WCACm (affiliate*)
*Purchasing from these Amazon affiliate links earns my channel a small commission. Think of it as a tip that doesn't cost you anything. Thanks for the support! 
Хобби
![[ GUILTY GEAR STRIVE: DUAL RULERS ] Teaser Trailer](http://i.ytimg.com/vi/e4TDqaE3XAg/mqdefault.jpg)
Brush Holder with Brush (x2):
amzn.to/2R0mceV (affiliate*)
Brushes only (if your brush holders are good):
amzn.to/3vx6pWY (affiliate*)
Miter Saw Switch (requires minor handle mod to fit):
amzn.to/2JrUoM7 (affiliate*)
Miter Saw Switch (to be used with new handle below):
amzn.to/3dTiayK (affiliate*)
Miter Saw Handle (to be used with new switch above):
amzn.to/2UNR2sd (affiliate*)
Switch/Handle Kit:
amzn.to/3aAkloH (affiliate*)
Multimeter:
amzn.to/2UNMDFy (affiliate*)
Milwaukee Drill & Driver:
amzn.to/2UNNUMZ (affiliate*)
Milwaukee Stick Light:
amzn.to/33WCACm (affiliate*)
*Purchasing from these Amazon affiliate links earns my channel a small commission. Think of it as a tip that doesn't cost you anything. Thanks for the support!
The brush holders are now $28 EACH!! Grrrr
That sucks! Prices seem to fluctuate wildly. If I remember correctly, I only paid around $25 for both brush holders and brushes. I found 'em for $19.99 here: amzn.to/3dHKOBk but you could also check eBay.
My DeWalt mitre saw stopped working. Thanks to your video I took out the brushes and cleaned them…working again !! Thanks so much!
That's great, glad to hear it, thanks for the comment!
Your video helped me fix my miter saw. I removed the brushes and blew them out. Started right up. So happy. Thanks!!
That's great, thanks for the comment!
You save my day,thank you. My vonroc mitter saw stopped working, İ changed brush but it stopped again. I thought my saw includes 1 brush but i saw 2 brushes in your video, i checked mine and tadaa. Thanks again.
That's great, I'm always happy to hear when a video was helpful, thanks for watching!
Awesome teaching here bro. Slow speaking, clear and concise instructions and links. Thanks
I really appreciate the positive feedback, thanks for watching!
I just fixed my not-working saw. THANKS. I just had to clean the switch.
Nice, I'm glad the video was helpful!
Excellent video, pretty darn clear on how to clean the miter table and components. Many thanks!!!
I appreciate it, thanks for watching!
I ran through the usual suspect of checking cord, checking switch and connections, brushes looked fine...it came down to a brush holder broken on the inside of the holder. Thanks for the video tip on the DeWalt 705 type saw.
I'm glad the video was helpful, thanks for the comment! :)
I just watched your video I haven't had a chance to try any of these techniques. But before I do I want you to know I really appreciate you taking the time to share this information. I'm sure it's all going to work out just fine thanks again hope you have a great day..update after touble shooting the switch with a multimeter it seemed okay both sides had connectivity. I took the brushes out cleaned up the copper wheel a little file down and flattened out the brushes.the brush holder looked good. Took the electric cord off of the saw and tested it and it had power. The motor seems to turn freely both ways with no problem. I put a multi meter on the ends of the outlet cord and pulled the trigger and no connectivity at all. All the wires seem to be connected as far as i could see. And the saw still won't turn on. Any way sir i appreciate you taking the time to share your experience. I cant thank you enough.
It sounds like you know what you're doing but I have some ideas if you're still up for troubleshooting. You may have already done everything I'm about to describe but I figured it wouldn't hurt to make suggestions, just in case. Open up the handle and disconnect the power cord wires from the rest. Use your multimeter, set on continuity, to test each wire. Hold one multimeter probe on one of the plug prongs and touch the other probe to the bare wires on the other end of the cord, one at a time. You should only get continuity on one of the wires. Move the probe to the other plug prong and test again. You should only have continuity on the opposite wire that had it during the first test. If you get continuity on both wires while only touching one plug prong then you have a short. If you can't get continuity on one or both of the wires then you could have a break in the wire. If the power cord passes the continuity test, test the switch again. While pressing the switch, you should only have continuity between the two terminals on the same side of the switch and no continuity between the two terminals on the other side. When you let go of the switch, it should reverse. You should no longer have continuity on one side but now you should have it on the other side. If the switch passes this test then I would recommend taking a look at the brush holders again. Unless you (carefully) remove the brush holders, it would be very difficult to know if they're broken. If you confirm that they're both ok then you could go further and test all of the other wires in the handle, one at a time, for continuity to be sure none are broken. If none of that works then my guess would be that you have a broken wire in the windings of the motor. At that point, it'd be cheaper to just buy a new saw. :)
Omg...... I was just about to throw my saw away. Now I feel confident enough to try and fix it. THANK YOU!!!
That's great, I love reading comments like this! Let me know how it goes.
@@Mikeattempts OMG...............!!!!! The minute I started to take the brushes out I could see the saw dust coming out with them. I gave them a quick spray and popped them back in and BAM.... ITS ALIVE AGAIN ❤️
Thank you!
@@PleasurePodTV That's awesome, you couldn't ask for an easier fix than that! Thanks for the update.
My saw had almost the same problem. A wire fell off of the brush housing. All fixed now...THANK YOU!
That's great, I'm glad you got it fixed. Thanks for watching!
Great video. I have same chop saw. It worked briefly when I lubed the switch with WD-40. But it is likely the brushes or holders. now I know what to try! Thanks
I appreciate the comment, thanks for watching!
This video just saved me buying a new saw. Thanks!
Awesome, glad to hear it, thanks for watching!
Thanks for making this video, it helped me quite a lot!!
Happy to hear it, thanks for the comment!
I have a dead ryobi. Your video was still accurate enough to apply to the ryobi. In my case it was the switch.
That's fantastic! It's great to know the video is also helping people with other brands of saws as well, I really appreciate you leaving the comment. Thanks for watching!
*Bought a few months backs **MyBest.Tools** used to cut some 2x4s to make a hanging swing. Cuts were precise and quick.*
Awesome, thanks for watching!
Mike, YOU ARE THE MAN
Haha, thanks! :)
Thanks man, I just repaired my mitre saw after watching your video
Glad to hear the video was helpful, thanks for the comment!
Excellent video !!!
I appreciate that, thanks for watching!
Thanks, this helped me figure out the problem with my saw. Have 2 brush holders on the way. It did exactly what yours did, did a 1/4 turn after doing nothing before. One brush holder was loose.
Great, I'm glad to hear the video was helpful. So, only one of your brush holders was broken? Did you break the other one while removing it, like I did? :)
Mike attempts I didn’t take it out yet so I bought 2! Lol it’s 15 plus years old. May as well replace them both at the same time!
Good plan. I noticed on mine that the black plastic part of the brush holders was brittle so it really is a good idea to replace them both. Thanks for watching!
P.S. I am 100% sure that in hell, how to videos are played on jumbotrons with no way to fast forward so you have to listen to “my grandaddy had this saw when I was a kid and we......”. This video is truly being played in heaven!!!
Hahahaha, I couldn't agree more! I wanted to make videos that I would want to watch. Thanks for the laugh! :)
Thanks for the video, got mine fixed.
That's great, thanks for the comment!
Very satisfying, I just found a Hitatchi saw with the same problem. I hope I can hear it run.
Let me know how it goes!
Great video. Thanks. I changed my brushes, didn't work. I hope its just the brush holders on mine. 🤞
Let me know how it turns out! :)
Thanks for a great video. I have the same exact saw with the same problems.
Nice, should be an easy fix. Thanks for watching!
That's it! Mine has the exact problem as this one. Thanks!
Cool, I'm glad the video was helpful! :)
Excellent, thanks.
Thanks for watching!
Thanks for this...I saw one today that was inop..
I hope you're able to get it running!
Very helpful mate thanks, Steve notts, England
I appreciate the comment, thanks for watching!
Good job done
Thanks for watching!
Thank you for the video. I was just given this saw by my bro. It won’t shut off so I assume it’s the switch you grab and press. It doesn’t click. Thanks again
Hopefully it'll be an easy fix, thanks for the comment!
@@Mikeattempts question. My saw is the DW705. Will your squeeze switch work?
Looks like it will thanks again
Good video thanks
Thank you for watching!
hi. Thank you for clear explenations.
Its noirmal that the ne brushes to make sparks when start the motor ? thank you!
I'm not a pro but, from my experience, it's normal for the brushes to spark when starting and stopping the motor. If you think the sparking is excessive, you might want to check the brushes for damage. Thanks for watching!
You are my hero bro I just got the same problem I save good money.
That's great, I'm glad the video was helpful, thanks for watching!
Great video! I have a question about repairing an Hitachi C12FDH. Where is a good place for reference? It appears that the bevel adjustment guide bolt cannot be inserted due to misalignment, but not sure. Please advise. Thx!
You should be able to search for "Hitachi C12FDH parts diagram" to find an exploded view of all parts, their orientation, and part numbers. That's the first thing I look for when I acquire a broken tool.
Nice thorough vid! I was hoping for an easy fix too but found a corner chipped off one of the brushes and must have got stuck in the armature because the inside of the housing is chewed up and has ripped into the coil windings😫
Wow, I'm surprised it was able to do so much damage, that sucks!
Hi Mike, It seemed that the brake wasn't working after your repair. It looked like the saw just slowed to a stop . The brake on my DW715 isn't working anymore. Any ideas?
I'm far from a pro but, from what I understand, the most common reasons for bad brake performance is the brushes. Supposedly replacing the brushes fixes the brake most of the time. If not, the commutator might need to be cleaned. It could also be the switch. When the trigger is pressed, it disconnects the brake. When released, the connection for the brake is active again. If you figure it out, I'd be curious to know because I have a DW715 as well. Thanks for watching!
Hi! I have an dewalt dw777 qs. It was working just fine until I had an electric overload or something like that. I was using a extension kable and noticed a pop in the cord and then the saw was dead. The fuse to the house went out as well. Any tips on what to replace?
I'm no pro but first I'd test the continuity of the switch, like I did in the video. While you're in the handle, look for scorch marks and burned wires. If the switch and wires are okay then my guess is that maybe the windings in the motor might have been fried. If that's the case, a repair might be more costly than buying a new saw. Let me know how it goes.
Thanks for the video. On mine the rotary table is very difficult to move. I am not sure how to disassemble and clean it. Any help would be appreciated
If you flip it over, there should be a bolt in the center that holds the two pieces together. However, you might not need to take it apart to resolve the issue. First, I'd blast everything in that area with some compressed air. There might be an accumulation of sawdust or a splinter of wood binding somewhere. If that doesn't resolve the issue, check the knob or lever at the front of the saw to be sure the mechanism is releasing properly. If that seems to be working good, remove that bottom bolt, clean the pivot point and all the sliding surfaces and lube 'em with some spray silicone. The spray silicone lube dries completely and leaves a slick film. Don't use other types of lube because they'll attract sawdust. Let me know how it goes.
i have the same saw that i bought 22 years ago , i havent had to change the brushes yet or anything else. the saw has been a beast , of course i bought mine when they were still built in the usa.
Yep, this one was built in the USA too. It was owned by a frame making shop before I got it so I think it saw a lot of use.
Now I just need free saw!
Yeah! :) I got this one just by asking for broken tools on a local email listserv. You could do the same on FB or Craigslist.
@@Mikeattempts Top idea, thanks Mike, much appreciated.
what modifications do i need on the new brushes?
No mods are needed but the saw will run at it's best once the brushes conform to the exact curvature of the commutator, it won't take too long. Thanks for watching!
Like you I'm looking at a close to free DeWalt miter saw, this one the brake is not working, is this a replaceable part. Does is coming out as easy as the brushes? Thanks for any advice.
From what I understand, the brake works by reversing the motor when the switch is released. Because of that, there are a few things that could cause the brake to stop functioning. If your brush holders are intact then just replacing the brushes will most likely restore the brake. If not, be sure to clean the commutator really well and test the switch. Let me know how it goes.
@@Mikeattempts Yes that was my understanding as well about how the brake worked as well. Thanks for your thoughts. If I end up with it I will let you know how I get on.
I have a new DW715 miter I've only used for two smaller projects. The second project it started to gradually lose power to where it wouldn't cut all the way through a 2x4. It turns on fine, but it doesn't fully come to power. Thoughts?
Hmmm, I'm not a pro at this stuff but the first thing I would do is to make sure the blade nut is tight. Next, remove the brushes and make sure there aren't any obvious signs of damage. While the brushes are out, blow some compressed air down the holes. Reinstall the brushes and see how it cuts. Is it still under warranty? If so, you might be able to get it fixed for free or replaced. Let me know how it turns out.
@@Mikeattempts pulled the brushes and they all looked good, but what it turned out to be was a loose blade. There wasn't any indication that the blade was loose, so I didn't expect it, but that's what it ended up being.
That's great, you couldn't ask for an better remedy, free and easy! Thanks for following up to let me know it's fixed.
Great video, I have the same saw, it suddenly stopped today. I checked the switch, cord, brushes and holders, was really thinking it had to be one of those. I really hate throwing things out, otherwise it's in good condition.
All those parts were fine on your saw? Hmmm, I guess the only other thing it could be is a broken motor winding. Thanks for watching!
@@Mikeattempts I dug further, pulling the motor and found the common connector off, it must have vibrated loose, there was pitting near the end from continued arcing. I reattached but, still would not work. Next checked the commutator, found segments shorted. So far I am unable to find a replacement Armature.
Yeah, unless you find one for a good price, it might be time to get a replacement saw. Let me know how it goes.
Great videos. I am trying to diagnose why my mitre saw has lost power to it. The laser light won't come on either so there is no power to it . What would stop it working? I am assuming that it won't be the brushes??? Any idea
I would guess there's either an issue with the power cord or the switch. If either of those are having issues, you wouldn't get power to the motor or the laser light. Let me know what you find out.
Bit embarrassing....it was the extension lead after all that! 🤣
@@andywalls18 Hey, better an easy cheap fix than a hard expensive one! :)
What would cause the brake to not engage after cuts? The switch??
Yeah, it's probably the switch. When you let go of the trigger, it engages the brake. However, I've seen some saws that stop very quickly and other brands/models that take a few seconds to come to a complete stop.
congratuletion enjoy...
Thanks for watching!
I knocked my saw over broke part of the casing but no other damage I can see , but now it starts but immediately looses power and stops, any suggestions?
I'm not a pro but it sounds like there might be a loose electrical connection. I would check the wiring connections, the brushes, and the brush holders.
My Miter saw starts and stops, no warning or pattern...I will "attempt" a fix...thanks for the guidance.
Let me know how it goes!
I was cutting round wood with mine and it stopped and smoked. And now it doesn't work. Do you think it can be fixed?
Depends on what caused the smoke. :) If it was the motor windings shorting out, then it'd probably be cheaper to get a replacement saw. However, if it was the switch or a wire inside the handle then that shouldn't cost much to fix.
Hi Mike, I've got a DW713 I can't seem to find the problem. It's not the bushes, motor or switch. When I connect the motor directly to the power it works, when I connect the brake directly to the motor it makes a loud buzz. I've no idea what else it could be? I can't see anything obvious. I've cleaned out the switch and tested the continuity - that seems fine on the black wires, but between the red and yellow I get some resistance when the switch is pulled. Any advice would be great.
If the blade only spins when power is connected directly to the motor then, you're right, that would rule out the motor, the brushes, and the brush holders. That only leaves the switch, or possibly a wire, as the culprit. My guess is that it's either bad switch or it is wired incorrectly. Let me know how it goes or if you have any other questions.
@@Mikeattempts hi, i found the issue. It seemed to be a bad power cord. The wires were all testing live in the saw, but it wasn't working. When I replaced the entire power cord it worked again! I guess that the circuit wasn't completing!
@@sickboy8682 That's great, I'm glad you got it fixed, thanks for the update!
Amigo, i have a question. I was given a ridgid miter saw, problem is that the blades runs or cuts backwards. Do you have any idea what may be the problem? The blade is also set in backwards. Thanks
You mean when looking at the side of the blade it spins counter-clockwise? If so, the wires that power the motor could possibly be reversed so the motor is turning the wrong direction. If the blade does spin clockwise but it isn't cutting, the blade could be on backwards.
@@Mikeattempts yes, the first option. The wires maybe the problem, is there any video you have done that could be my guide?
@Ram Vale I don't have a video for that specific fix but you should just be able to take apart the handle and look for the red and black wires going into the switch. Disconnect the wires and reconnect them opposite of how they're connected now. Let me know if it works.
I have this same saw, when I release the trigger, there is a bright orange or yellow flash in the black motor housing. I replaced the brushes, and it still does it, and it's only when I release the trigger after running it. Do you have an idea what this may be? Also, thank you for this video. You obviously help alot of people out
A small amount of sparking is normal. If it's excessive, it usually means that the brushes need to be replace (which you already did) or the commutator needs to be cleaned (the cylinder that the brushes contact). You could try removing the brushes and blowing compressed air down the brush holder slots to clean off the carbon buildup on the commutator.
I cleaned out the brush holders and inside the cover with compressed air and tried it again, I notice that it pushes what looks like a fire ball inside the cover with a high pitched whine, and then the brake engages to stop the blade, and sometimes it doesn't make the high pitch quick whine, but the brake also doesn't stop the blade, which leads me to believe that it has something to do with the brake?
@@CHESTURCH I may not have explained it well enough but, after removing the brushes, you should be able to look down the slots and see the commutator. You should be able to shoot some compressed air directly at the commutator, via those brush slots, while slowly turning the motor by hand to clean the entire commutator. Also, it takes new brushes a little bit of use before the ends form themselves to the exact shape of the commutator. After that, the sparking may be reduced. The switch controls the brake. From what I understand, when you let go of the switch, it sends a signal to the motor to reverse, which causes the blade to slow down more quickly. If your brake isn't working then it could be a bad switch or a loose wire going to the switch.
just found one in dump where brake did not engage, will test switch... thanks..
Cool, let me know if you get it fixed.
@@Mikeattempts winter now, so prob not until next spring have time to tinker with it.. but certain I will get it working since fixes seem simple enough..
What if the yellow and red wires are always closed? No matter the switch is pushed or released! How to diagnose and repair this issue?
If I understand correctly, that would mean the switch is bad.
yes
Thanks for watching! :)
I bought DCS781B from a tool shop I found on the market place. I paid the guy $500. The saw does not turn on what so ever. I am having my first baby soon and my plan is to save money instead of buying a new one for $700 plus tax. I ended up getting robbed.
Do you think dewalt sells parts for the new miter saw? I’m new to wood working and I’m just not having the best time. Any help is appreciated. Thank you for the video!
Aww man, that sucks! Yeah, you should be able to get Dewalt replacement parts from various sources online (Amazon, eBay, mmToolParts, etc.). Hopefully you can use some of the techniques in the video to find the culprit. Then you'll just need a parts diagram for your model so you know the part numbers. Maybe you'll get lucky and it's just the switch. Let me know how it goes!
What about the armature and field
If the problem would have been in the armature or field windings, I think it would have been difficult to find and repair the broken wire.
Replace spring in Hyderabad
When the spring breaks, I'll be sure to make a video. Thanks for watching from India!
Como se instala un suiche 1:16
I cover testing the switch at 3:54. To install a new switch, just disconnect the wires and reconnect them to the same terminals on the new switch.
just found one of these myself a day ago. curbside, left for dead basically. power goes in, but saw won't start. missing a brush. hoping the armature is okay. i'm hoping i won't have to break it down & replace bearings ike this guy did: ruclips.net/video/0tXkhG5XCrc/видео.html
Nice find! My guess is that the previous owner ran it until the brushes were completely worn down. Was the brush spring still inside the brush holder? If not, hopefully the previous user removed it, and it didn't get pulled in. If you can spin the blade and it doesn't make any strange noises, you should be good to go. You can also look down the brush holders and spin the blade to see how the armature looks. Hopefully it'll be as simple as blowing it out with some compressed air and replacing the brushes. Let me know how it goes!
@@Mikeattempts it's a fail. checked all gears, wires, & bearings, blew out dust. put in new brushes. saw runs for 5-10 seconds pouring smoke everywhere, then shuts off. reddit says that there's a short on a copper winding. if that's the case, this saw is scrap recycling for my neighbor 😢😭
@@fong.justinm Aww, that suck. You could test the stator and armature with a multimeter to see which has failed and then order a new one. However, depending on the cost, it might not be worth it.
@@Mikeattempts yeah, anything motor/armature related, i leave alone. especially since this saw is missing several dust covers & a fence. which are NOT cheap to replace.
Ah, makes sense.
very wrong; you should have checked the wiring and switch first!
Yeah, I could have tested continuity of the switch first but I was going to take apart the switch either way so it didn't matter. I wanted to see what was inside, see how it worked.
Complete waste of time!!!
Thanks for watching! ;)