|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
04-10-2020, 09:00 PM | #1 |
Member
Join Date: Mar 2020
Location: Charlotte NC
Posts: 63
|
1931 rear spring & perch bushing
when replacing the shackle it says to replace the two bushings also. Macs says to drill out the old one with a 14.5mm bit but it looks to me like it would make the Perch very thin on mine anyway. The new bushings look pretty thick. My shackles were very worn out. Any input would be appreciated.
Thanks |
04-10-2020, 09:24 PM | #2 |
Senior Member
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 7,496
|
Re: 1931 rear spring & perch bushing
Many perches have been neglected over the years to the point where they are very badly worn on the under side. The bush doesn't contribute to the strength of the setup so if your perches are that bad that the shackles have left a hollow spot on the top of the axle housing (trumpet), you might be best advised to repair them. It isn't difficult. Find yourself a piece of copper or brass rod the size of the hole in a good perch. Insert it into your worn one and arrange for it to be held in the "up" position - the opposite direction to the worst wear. Now proceed to replace the metal that has been worn away with weld. The weld will not adhere to the non-ferrous rod. Once done, remove the rod and insert your new bushes.
I'm sure others will chime in here too.
__________________
I'm part of the only ever generation with an analogue childhood and a digital adulthood. |
Sponsored Links (Register now to hide all advertisements) |
|
04-11-2020, 07:13 AM | #3 |
Senior Member
Join Date: Jun 2015
Location: Signal Mtn, TN (SE TN)
Posts: 2,372
|
Re: 1931 rear spring & perch bushing
Sometimes its difficult/nay impossible to remove a copper or brass rod.
I’ve used gouging rod which is carbon; it can be broken out with punch, chisel, etc It’s available from McMaster Carr Can’t remember if it’s 3/4 or 7/8” |
04-11-2020, 12:46 PM | #4 |
Senior Member
Join Date: May 2010
Location: Southern California
Posts: 3,131
|
Re: 1931 rear spring & perch bushing
Bratton's sell a 14.5mm drill bit for the purpose of using it as a reamer once a new bushing has been installed, if need be. I bought one to use for checking the fit, however Bratton's bushings do not need to be reamed, they are always a good fit. I don't see how a 14.5mm drill bit would drill out the old bushing.
The old shackle bushings can usually be driven out with a tool made from an old pedal or clutch release shaft turned down to fit inside the bushing with the outside edge the same size as the outside diameter of the bushing. A hammer will usually drive them out, for the stubborn ones I occasionally have had to use the shop press. Bratton's sell such as tool, part number 5881 $8.90 described as a spring and perch bushing driver. Tom Endy |
04-11-2020, 03:12 PM | #5 | |
Senior Member
Join Date: Jan 2019
Location: Florida Panhandle
Posts: 585
|
Re: 1931 rear spring & perch bushing
Quote:
|
|
04-11-2020, 07:11 PM | #6 |
Member
Join Date: Mar 2020
Location: Charlotte NC
Posts: 63
|
Re: 1931 rear spring & perch bushing
Sponsored Links (Register now to hide all advertisements)
Thanks |
|
|
Sponsored Links (Register now to hide all advertisements) |
|