Question about Porter Cable Cable Variable - Speed Random - Orbit Sander 6" with Polishing Pad 7336SP

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My Porter Cable polishing machine slows down when used

Hi, my Porter Cable dual action polishing machine slows down to a stop when applied to a vehicles bodywork, could you please advise me what the fault is.
Could it be the motor brushes ?

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Yes, probably the brushes are worn down.

Posted on Apr 30, 2010

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Posted on Jan 02, 2017

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1 Answer

My Porter Cable will run for 30 to 45 seconds and just stops. After a few seconds it will start again. What could be the problem the batteries are fully charged.


Hello Terry Dugger,

If it is suddenly stopping it could be a bearing problem... but if it is slowing down like a tired battery...

DEPENDING VERY MUCH on what kind of battery
you have (undisclosed model ...purpose tool)...
"some" RECHARGEABLE BATTERIES develop a memory... and are reluctant to go BELOW that level.

Typically these are seldom used tools...
wiki does a pretty good description on these batteries (types).

There are folks out there that think it is CLEVER to DISCHARGE these thing... or pulse them to BREAK THE MEMORY.

Likely to case a fire or explode as to succeed...

If you are suddenly using a tool that has been stored foe a while... you MIGHT notice the battery time is getting better...

Else just buy a replacement battery...
Cordless tools do not do well if stored incorrectly.

Hope this helps.

https://en.wikipedia.org/wiki/Memory_effect

Nickelcadmium battery

Porter Cable Home

Amazon com porter cable batteries

Oct 25, 2016 | Porter Cable Tools & Hardware - Others

1 Answer

How do I remove the rotating disk on a porter cable polisher model 7336


You have to use a wrench behind the disk for a stop and then unscrew from the housing Porter Cable

Feb 23, 2013 | Porter Cable Porter-Cable Variable Speed...

1 Answer

The tracking knob on my porter cable 371k belt sander isn't working.


knob may have come loose from the metal threads---might be able to epoxy it back together.

Feb 27, 2010 | Porter Cable 371K Electric Sanders &...

1 Answer

Looking for a replacement vacuum hose adapter for a Porter Cable 371 belt sander


part number is A13918 cost is .92 you can go to Dewaltservicenet.com and find a local repair center or order it online from them. If I have helped you with your request would you please rate this response accordingly. Thank you.

Feb 14, 2010 | Porter Cable 371K Electric Sanders &...

1 Answer

Porter cable polisher5 7424 only works at max speed


it could be that the variable speed module is malfunctioning. If it is the part number is 886978 and lists for 12.27. I would check for a buildup of polishing pad inside the handle area and clean thoroughly before ordering any parts. You can view a breakdown at Dewaltservicenet.com

Oct 07, 2009 | Porter Cable 371K Electric Sanders &...

1 Answer

What regular service should I carry out on my Porter Cable 7424 polisher


just keep it clean. if you have a compressor, blow out the dust from the motor once in a while

Jul 19, 2009 | Porter Cable 7424 3.7 Amp 6 Inch Variable...

1 Answer

I have the porter cable 7424 buffer/polisher. My problem is when you apply any pressure, even the weight of only the buffer on the car it stops spinning. You have to hold it up slightly lifting the we


The armiture has a winding problem, common in a lot of power tools. Replacing the armiture is not cost affective unless your time put into it is worth it, sorry. I recomend the Dewalt veriable speed, nice professional buffer!

May 07, 2009 | Porter Cable 7336 6 Inch Variable Speed...

1 Answer

Broken drive belt


After talking to Porter Cable there is a tool to put the belt on or you can take it to a service center to have it put on. Tool cost is $213.00 . Best advice is buy something else.

Oct 30, 2008 | Porter Cable 371K Electric Sanders &...

1 Answer

Cordless or corded models


cordless is easier to use, but if you use the polisher for a big job the cord models are better for due to continues power supply.

Aug 27, 2008 | Porter Cable 371K Electric Sanders &...

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