PC 7424XP stripped threads

[richieboone]

Hi,
I lust recently bought a new black vehicle. Sigh.
Anyway, this is my first black vehicle and of course a day after I had it I noticed the halos and swirl marks. So rather than complain to the dealer, I figured I better learn how to do this myself.
I received my PC 7424XP today and it came with a white foam pad( I have a kit of pads on there way) so I decided to just screw the pad on and tighten it down. First I tightened it by hand then I reached for the wrench and before I could put any type of pressure on it--it turned freely. So I was like what the....I looked at the threads on the pad they look fine and the threads inside the PC seem to be ok too? What is going on? Since I don't have the other pads at the moment I can't really say that the threads on the inside of the unit are actually good or not. Any help? Ideas?
Oh this black paint is gonna be a pain:0
Seriously considering taking a loss and trading it in for silver.

[poweraid]

u must mean the backplate ? I have never heard of the problem u are having . maybe the treads are bad on either the pc or the Bp . does it still spin freely when u hold the Bp with your other hand while tightening down ?

[richieboone]

Originally Posted by poweraid

u must mean the backplate ? I have never heard of the problem u are having . maybe the treads are bad on either the pc or the Bp . does it still spin freely when u hold the Bp with your other hand while tightening down ?

Yes it spins. It seems loose, but like it is going to tighten then when it's almost a gentle tight it turn freely.
I'm new to detailing but not to tools.

[richieboone]

Originally Posted by richieboone

Yes it spins. It seems loose, but like it is going to tighten then when it's almost a gentle tight it turn freely.


I'm new to detailing but not to tools.

poweraid, I didn't mean that in a bad way. Just doesn't make sense to me.

[poweraid]

I'd say u got a bad one there then and since u familiar with tools it not a user error. u prob don't have another Bp on hand that u could try either yet ? then it's if it's the Bp or the pc ? maybe go to hardware store pickup a bolt of same threads and see what happens . otherwise ag will take care of you no problem . being that it is the weekend u prob not get any cs till Monday ? if u need or want your pc ASAP i would call early Monday morn , explain the problem , order. new one and then just send bad one back for credit rather than waiting for the swap out after they get the old one . maybe someone else here has had the same prob and would know a little more . sorry I couldn't be of more help there and sucks u didn't even get to use it .

[richieboone]

Originally Posted by poweraid

I'd say u got a bad one there then and since u familiar with tools it not a user error. u prob don't have another Bp on hand that u could try either yet ? then it's if it's the Bp or the pc ? maybe go to hardware store pickup a bolt of same threads and see what happens . otherwise ag will take care of you no problem . being that it is the weekend u prob not get any cs till Monday ? if u need or want your pc ASAP i would call early Monday morn , explain the problem , order. new one and then just send bad one back for credit rather than waiting for the swap out after they get the old one . maybe someone else here has had the same prob and would know a little more . sorry I couldn't be of more help there and sucks u didn't even get to use it .

Thanks.

[embolism]

I don't think the PC comes with a real backing plate. If you bought it as a package from AG then you might have one but if you just got the unit itself then no.

I believe the pad that comes with the machine is glued onto the "plate" so you can't change it to a different pad. Not even sure I would call what's on there a pad either. You can slap a bonnet on it for removal of wax but you should really get a 5 inch bp for use with your pad kit.

remember to put on the plastic washer with your new bp.

Also, I can't recall as I haven't needed to remove the bp from my polisher for a long time but I think the wrench is just for holding the spindle stationary so you can wind/unwind the bp from the assembly by hand. It isn't used for tightening anything.

[BobbyG]

I believe the threads Porter Cable uses for their machines is 5/16-24. Get a 5/16-24 bolt and test the threads in the machine to see if they engage properly.

Once the pad is tightened in place the mechanism spins freely.

[Murman]

Originally Posted by richieboone

Hi,
I received my PC 7424XP today and it came with a white foam pad( I have a kit of pads on there way) so I decided to just screw the pad on and tighten it down. First I tightened it by hand then I reached for the wrench and before I could put any type of pressure on it--it turned freely. So I was like what the....I looked at the threads on the pad they look fine and the threads inside the PC seem to be ok too? What is going on?

I think the spindle is turning (as it should)... the wrench is to hold the spindle while you hand tighten the pad or backing plate to the spindle...

The OM is available here...

[richieboone]

Originally Posted by Murman

I think the spindle is turning (as it should)... the wrench is to hold the spindle while you hand tighten the pad or backing plate to the spindle...

The OM is available here...

When I hold the spindle with the wrench, the pad+backing plate spin. Got to be stripped inside the spindle. In the process of returning the machine now.