PC bogs down with slightest pressure on pad

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emaxxman

New member
I have the PC 7336 that you can get from Lowes. I apply NXT with a finishing pad. I noticed that since the pad is quite soft, the weight of the PC will squash the pad. I find that when on speed 3 or 4, the pressure of the weight of the PC will bog down the PC and keep it from spinning the pad. I then have to lift the PC up in order to get an even application of NXT. I also get this to a lesser degree with a polishing pad and speed 5. It makes it tough to apply the pressure that I'm supposed to apply when working with LSP's and polishes.



Is this normal? Anyone else experience this? If so, what was your remedy?



I know that the PC is designed to slow the rotation down if there is alot of resistance...I just didn't think it was this sensitive.
 
I use speed 2 for applying sealants and waxes.



Just hold it near the middle and guide it across the paint. Ive never had any issues of it bogging downwith no pressure on it.
 
No it shouldn't be bogging down. When applying a sealant or wax don't use any pressure at all and let the weight of the PC move across the paint. I usually apply at 2 or 3.
 
Yea...I bought a PC from a place similar to Lowes. It did the same thing. I threw in the trash (well actually it is sitting in my closet), and ordered a G100 PC from Meguiars. Problem solved.
 
skitelluride531, your G100 from Megs is just a rebadged Porter Cable!



There is NO difference from the one you buy anywhere else except You paid more.



Did you buy a Porter Cable from the store or you just calling it a PC? major difference.........
 
Red98gt said:
skitelluride531, your G100 from Megs is just a rebadged Porter Cable!



There is NO difference from the one you buy anywhere else except You paid more.



Did you buy a Porter Cable from the store or you just calling it a PC? major difference.........
Click to expand...





I am aware of that. I just have a slight feeling the PC (Yes...it is was Porter Cable 7424) that I bought from the store was perhaps mishandled before being delivered to me, or mishandled in the store. Maybe I am just being silly though. All I know is that the Meguiar's branded PC I have works perfectly, and the other one boggs down like the original poster says.
 
Red98gt said:
skitelluride531, your G100 from Megs is just a rebadged Porter Cable!



There is NO difference from the one you buy anywhere else except You paid more.



Did you buy a Porter Cable from the store or you just calling it a PC? major difference.........
Click to expand...



It's a PC for sure. Also, it's not like it stops completely. It slows down like it's supposed to but it just seems like it's slowing down with not much pressure. With that said, turning it up to speed 5 solves the problem.
 
emaxxman said:
.........It slows down like it's supposed to but it just seems like it's slowing down with not much pressure.........
Click to expand...
What size pads are you using? The larger the pad size you use the easier it is to bog down a PC. If you try using a 6" BP and 7.5" pads it will bog down a lot easier than with 6/6.5" pads and a 5" BP.



It sounds like your PC is probably operating normally. My PC is a G100 that I picked up from Meg's as a car show special a couple of years back and it doesn't take a whole lot to bog it down. I actually like using it a little better with 4" pads and a 3.5" BP.... it doesn't bog down nearly as bad, which is especially helpful when doing corrections.
 
thesacrifice said:
Mine bogs down too, even at speed 5 and 6 if I use the recommending 15-25lbs for compounding/polishing......that's not normal?
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I'd say that is pretty much the norm with a PC using that much pressure. Even when it stops spinning it is still working from the jiggling or oscillating motions, that is just the nature of the beast when you apply that much pressure to a PC.
 
wait, mine bogs down, but only when using a small backing plate and smaller pads!!!



5" plate with 5.5" pads = bogging

6.75" pads with a 6" plate is hard to bog down....



the opposite of what someone else just said....hmmmm
 
toyotaguy said:
wait, mine bogs down, but only when using a small backing plate and smaller pads!!!



5" plate with 5.5" pads = bogging

6.75" pads with a 6" plate is hard to bog down....



the opposite of what someone else just said....hmmmm
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It could depend on the construction of your pads. The 5.5" are probably flat pads and the whole surface is in contact with the paint. Some of the larger pads are shaped differently (kind of like these LC pads) so that the whole surface isn't in contact unless you apply a lot of pressure.



If your 6.75" pads are flat then :nixweiss
 
well the 5.5 are the lake country ones - orange

the 6.75 are the exceldetail ones....reason i love the exceldetail pads so much - dont bog down the PC
 
Both of my PCs bog down under pressure *unless* I'm using 4" pads. How readily they bog down depends on the pads. They've always behaved like this, when new, when (quite) used, when acting funny, when rebuilt, *always*. Mike Phillips used to call the PC a "jiggle machine" because of this, and he was referring to the Meguiar's-label "G-100", so it's IMO normal. What we're doing is very different from the original *sanding* that the PC was designed for; you don't apply pressure when you're finish sanding ;)



If any PC is acting funny, I'd sure get it rebuilt before I gave up on it. Rebuilds are cheap, cheap enough that I don't remember how much it costs.
 
With the Megs backing plate and couter weight mine used to bog down all the time (and the pads would shoot off...) Since I switched back to stock PC stuff with the megs pads I can get it spinning pretty furiously...
 
Maybe make sure to have the 5" counter weight installed rather than the 6"? Using a lighter combination of a 5" BP with a 5" counter weight and using light. Heavier BP's & CW's rob the efficiency of the PC applying more torque to the PC shaft. Just a thought...
 
Wow...lots of replies since I last checked for answers...



1) I'm using the Lake Country 6 inch pads with flexible backing pad...bought from autogeekonline.



2) The pads are the flat pads which have full surface contact.



3) Jiggle machine is definitely the right word for it.



I think it's because of the really soft finishing pad. The weight of the PC seems to be too much for the pad. I think I'll put a mark on the backing plate with a marker so it's easier to see if it's spinning or jiggle.



Overall, the PC is great for laying down an even thin layer of LSP. I was just concerned that, if I apply the proper amount of pressure to polish, it wouldn't spin correctly.
 
I have a 7336 that I bought from topoftheline and it works great! It has a lot of juice to it and has never bogged down, even with 7.5 pads. I heard that lowes sells the refurbished ones as new ones. That's why they are a lot cheaper there. Summer they were on sale for $99. My friend that works there said don't buy it from there.

Just to help everyone out. Spend the money and get one from one of these detailing sites.
 
rydawg said:
I have a 7336 that I bought from topoftheline and it works great! It has a lot of juice to it and has never bogged down, even with 7.5 pads. I heard that lowes sells the refurbished ones as new ones. That's why they are a lot cheaper there. Summer they were on sale for $99. My friend that works there said don't buy it from there.

Just to help everyone out. Spend the money and get one from one of these detailing sites.
Click to expand...



I just bought a new one from Lowes. It looks brand new directly from PC. I think they would have to disclose if it was refurbished. Anybody else know the details?
 
rydawg said:
I have a 7336 that I bought from topoftheline and it works great! It has a lot of juice to it and has never bogged down, even with 7.5 pads. I heard that lowes sells the refurbished ones as new ones. That's why they are a lot cheaper there. Summer they were on sale for $99. My friend that works there said don't buy it from there. Just to help everyone out. Spend the money and get one from one of these detailing sites.
Click to expand...



That is just crap! Have your friend show us proof. Stores like Lowes, Home Depot, and even Amazon.com deal in high volumes. That's why they can offer it at a lower price. I find it hard to believe that the dozen or so units that I saw at two different Lowes were all refurbished.
 
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