LEE pro auto disc leaking powder questions

Road_Clam · September 8, 2015, 06:37 PM

OK, so I'm having a situation where my pro auto disc powder dispenser is spilling some powder. I took the unit completely apart and I can't see anything obviously wrong. I do have about 1/16" of free slop in the discs and I don't know if the discs are supposed to be sealed against the body or not. Those of you that have the double disc kit is there any play in the discs ? I can also see light between the top cover the to top of the disc so this is obviously where the powder is leaking out. There is a rubber sealing ring that is not contacting the top disc and I'm wondering if this is my problem ?

9miller · September 8, 2015, 07:43 PM

I would assume that the "elastomer wiper" not contacting the disk is your problem. I use the double disk when loading AR fodder and do not have a gap between the wiper and disks. I do have about a 1/16" play front to back as well. Seems as that's the norm with the disks.

**Mike Irwin** · September 9, 2015, 05:50 AM

Over time the wiper may degrade a bit, causing leaking. Mine is doing that right now especially with powdersl like AA 7, which is more like dust.

I keep meaning to try making a gasket or two out of various materials (paper, thick paper, plastic) to see if that cures the issue. If not, I'll try replacing the wiper.

wild willy · September 9, 2015, 03:55 PM

http://leeprecision.net/support/inde...easure-leaking

std7mag · September 9, 2015, 05:29 PM

Road Clam,

I get some "leakage" with mine also, I got the upgrade kit. Seems to really only do it with my Ramshot True Blue, and other really small grain ball powders. Some of which really are like powder...

Road_Clam · September 9, 2015, 05:38 PM

Wild Willy, that's exactly the mod I was thinking of. I also might take the base and mill about .010" off the top rails. This will basically achieve the same outcome as sanding down the risers. I think if I can get the disc to contact the rubber wiper i'll be all set. My base machining mod will also work if I only want to use a single disc setup for pistol charging.

ddc · September 10, 2015, 04:46 PM

I sanded down the risers and it helped a lot. Not perfect but good enough for now.

Road_Clam · September 10, 2015, 05:58 PM

Deleted, started a new thread.

September 8, 2015, 06:37 PM	#1
Road_Clam Senior Member Join Date: November 21, 2013 Location: New Hampshire Posts: 1,695	LEE pro auto disc leaking powder (fixed w/pics) OK, so I'm having a situation where my pro auto disc powder dispenser is spilling some powder. I took the unit completely apart and I can't see anything obviously wrong. I do have about 1/16" of free slop in the discs and I don't know if the discs are supposed to be sealed against the body or not. Those of you that have the double disc kit is there any play in the discs ? I can also see light between the top cover the to top of the disc so this is obviously where the powder is leaking out. There is a rubber sealing ring that is not contacting the top disc and I'm wondering if this is my problem ? __________________ "To be old an wise you must have been young and stupid" Last edited by Road_Clam; September 10, 2015 at 06:03 PM. Reason: Update !

September 9, 2015, 05:50 AM	#3
Mike Irwin Staff Join Date: April 13, 2000 Location: Northern Virginia Posts: 41,381	Over time the wiper may degrade a bit, causing leaking. Mine is doing that right now especially with powdersl like AA 7, which is more like dust. I keep meaning to try making a gasket or two out of various materials (paper, thick paper, plastic) to see if that cures the issue. If not, I'll try replacing the wiper. __________________ "The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza Baby Jesus cries when the fat redneck doesn't have military-grade firepower.

September 9, 2015, 05:38 PM	#6
Road_Clam Senior Member Join Date: November 21, 2013 Location: New Hampshire Posts: 1,695	Wild Willy, that's exactly the mod I was thinking of. I also might take the base and mill about .010" off the top rails. This will basically achieve the same outcome as sanding down the risers. I think if I can get the disc to contact the rubber wiper i'll be all set. My base machining mod will also work if I only want to use a single disc setup for pistol charging. __________________ "To be old an wise you must have been young and stupid"

September 10, 2015, 05:58 PM	#8
Road_Clam Senior Member Join Date: November 21, 2013 Location: New Hampshire Posts: 1,695	Deleted, started a new thread. __________________ "To be old an wise you must have been young and stupid" Last edited by Road_Clam; September 10, 2015 at 06:57 PM.

September 8, 2015, 07:43 PM	#2
9miller Senior Member Join Date: January 11, 2012 Location: Myrtle Beach, SC Posts: 169	I would assume that the "elastomer wiper" not contacting the disk is your problem. I use the double disk when loading AR fodder and do not have a gap between the wiper and disks. I do have about a 1/16" play front to back as well. Seems as that's the norm with the disks.

September 9, 2015, 03:55 PM	#4
wild willy Senior Member Join Date: March 8, 2006 Posts: 404	http://leeprecision.net/support/inde...easure-leaking

September 9, 2015, 05:29 PM	#5
std7mag Senior Member Join Date: June 23, 2013 Location: Central Taxylvania.. Posts: 3,609	Road Clam, I get some "leakage" with mine also, I got the upgrade kit. Seems to really only do it with my Ramshot True Blue, and other really small grain ball powders. Some of which really are like powder...

September 10, 2015, 04:46 PM	#7
ddc Member Join Date: November 26, 2000 Location: PNW Posts: 83	I sanded down the risers and it helped a lot. Not perfect but good enough for now.