Question about Hitachi Drills

Open Question

Hitachi VTV-18 110v drill. Excessive sparking

Hitachi VTV-18 110v drill. Excessive sparking from one brush when drill approaches top speed.
Have cleaned comm and removed/inspected brushes which appear very little worn and with good spring tension. Sparking not excessive until high speed reached then one brush begins to 'flare' as though brush riding off comm.

Any help gratefully recieved, thanks.

Graham illsley.

Posted by on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
  • 104 Answers

SOURCE: brushes

well i use to rely on makita and Campbell Hausefield and because I used them a lot - I always had a set on hand - I as a general rule would not run them below 75% wear- go to their web sit and check - be advised that as the armature wears- you will get less mileage from brushes. Best of luck. Oh replace them is you are in doubt-this willprevent bunrout on armature

Posted on Oct 16, 2008

Ad
rowdy45176
  • 2176 Answers

SOURCE: motor brushes spark like crazy!

If you already replaced the brushes you could have a couple problems, the least is the armature commutator needs cleaned and the more expensive is that it needs replaced. This is a problem unless you want to tackle taking the motor partially apart. Let me know what route you want to take either a repair center or looking at the commutator.

Posted on Jan 14, 2009

  • 14 Answers

SOURCE: sparking

sounds like the stator is damaged. that is the shaft that the brushes rub on. unfortunately this usually means time to buy a new saw. since you really don't have much to loose, you can tear the saw apart and pull the stator shaft out and sand the copper area and smooth out any rough spots or nicks.Ultimatley you would want to chuck it up in a small lathe and turn it down a hair.this would ensure that you stay even all the way around. but most people don't have a lathe so just put it in a vise and take some 120 grit sand paper,preferably narrow strips about 1inch thick and start working your way around.

Posted on Jan 18, 2009

rowdy45176
  • 2176 Answers

SOURCE: exesive sparking

Couple things, I would first take the handle half apart (if there one) and look at the condition of the commutator. Second make sure the brushes are fully seated. What happened to the old set of brushes, why did you replace them. Are the brushes you bought made for this tool? Sometimes when replacing the brushed the commutator has to seat them. THis is tricky unless you know what you are doing. Check on the items I suggested and get back to me and lets see what else we can look at. One more thought on the armature commutator how do the bars look, are they all pretty much the same or do you see some that are raised above others, if so the armature is bad and needs replaced.

Posted on Feb 18, 2009

rowdy45176
  • 2176 Answers

SOURCE: cant figure out how to remove brushes

go to Dewaltservicenet.com and in the middle of the page at the bottom type in your model number and it will take you to a page so you can bring up a schematic on this tool. let me know if you need any more help

Posted on Jun 10, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Hitachi 24v sds hammer drill issues with speed when pulling back trigger switch sometimes works other times nothing, already changed dc speed control trigger any ideas to what the problem is? Thanks


faltering on a slide contact on electric field or switch, but in most cases dirth (dust) in carbonbrushes can be hanging somewhat in one or both brushholders.
Or a problem in the trigger switch itself dust and dirth have almost the highest priority in case of faltering by clamping carbon brushes.

Oct 04, 2016 | Hitachi Drills

1 Answer

Makita LXDT04 Impact Driver Sparks coming out of it


It could be that your brushes (PN CB440) are worn down so much that they can't make full contact with the armature or the armature (PN 619247-1) has a short in it causing excessive arcing. This would be evident by excessive burning or pitting on the commutator where the brushes make contact or missing sections of the commutator..

May 15, 2014 | Makita BDF452HW 18V Cordless Lxt Lithium...

2 Answers

Hitachi ds 18dsal stopped working suddenly


a carbon brush (brushholder problem) or switch to measure

Remove both brushes set a voltmeter on dc connect the testpoints inside the both brushholders and pull the switch there must be voltage if not replace the switch.
https://devs.hitachi-koki.co.jp/ois/explodedDiagram.html?type=svg&modelName=DS18DSAL&newwindow=true

Dec 29, 2013 | Hitachi DS18DSAL 18V Compact Pro Lithium...

1 Answer

Rattles in Reverse


There are quite a few bearings in there Items 23, 26, 20, 17, 13. I would double check all the bearings. Not something I have seen but given your description of the sound I would look at them again. I usually change them all if one is bad. I hate to change one and have the customer come back a month later with another one making noise. Also do not sand the brushes. You can use emery cloth on the armature commutator bars where the brushes ride but most brushes are shaped to fit the contour of the armature so be careful not to sand them flat. There is no need to sand them either. If the armature shorts out the tool will throw off excessive sparking and it would need a new armature and brush set anyway.

Jul 21, 2012 | Electric 3/8" Close Quarter Right Angle...

1 Answer

Hilti TE14. It rotates slowly and i'm getting a burning smell from the area around the armiture?


I would bet the armature is shot for sure and possibly the field. When an armature shorts out it usually gives off excessive sparking from the brush area. When a field fails it will usually run very slow if at all.

May 17, 2012 | Hilti Hammer Drill Bit, Te Yx 5/8 In. X 13...

1 Answer

How to dismantle a makita HP electrical hammer drill, want to replace the brushes


Check out the split drawing on this page.
If your makita does not have any outside accessible brush caps, you need to dismantle it.
lay it on the side, where the side with the screws securing the to halves together is facing up.
Remove all screws (some may be hidden under labels etc.) Gently pry the halves apart, locate the brushes disconnect their leads if any, and remove. Install new brushes and make sure the move freely, and that they are springloaded when in place. Gently rotate the rotor to ensure everything is ok . Reassemble and test drill. If the brushes leaves long streaks of noticeably large sparks, something has gone wrong or the rotor was damaged in the first place, causing excessive wear.

Sep 13, 2010 | Makita HP1620F Electric Hammer Drills

1 Answer

Hi, I have a dewalt dc925 drill. When running the


They all do that a bit. The sparks when starting up and stopping are normal. If it has been used alot brushes may be a good idea but before they need to be changed it will spark quite a bit.

It will not hurt to inspect the amount of brush material remaining.

Jan 04, 2010 | Dewalt DC925 Cordless Drill

Not finding what you are looking for?
Drills Logo

Related Topics:

178 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hitachi Drills Experts

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

John Trevino

Level 3 Expert

1388 Answers

Cindy Wells

Level 3 Expert

5160 Answers

Are you a Hitachi Drill Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...