Brakes again

[Bernie Benz]

Brett,

Apparently moisture (your local salt water) got into the pin/caliper bushing
interface.  Several common sense comments on your guide pin rebuilding:

Don't use a water soluable, litheum soap base grease.  Use something like a
trailer wheel bearing grease.

Load the blind hole with grease before inserting the pin.   The excess will
be forced out when the pin is inserted.  The grease will exclude any water
that may become present.

Lightly grease the boot interfaces for a better water seal.  Equalize the
internal air pressure within the boot after the caliper with pads are
installed.

Bernie



> From: Brett Dikeman <brett at cloud9.net>
> 
> These pins came off a caliper that was 'rebuilt' a little over a year
> ago, maybe two.
> 
> http://frank.mercea.net/~brett/pins.jpg
> 
> The one on the left is the lower pin.  Both had intact boots.  Both
> had the boot seal area sandblasted clean and then sanded smooth- and
> coated with grease before installation.  Both were 'turned' using an
> electric drill and polished to a mirror finish, and the inserts were
> sanded of any burrs.
> 
> Both had plenty of grease in them when they came off this evening-
> but with the lower one, the grease was full of rust.  It's a little
> hard to tell from the photo, but the right pin has much more rust
> around the seal area of the boot.
> 
> The passenger side pins were in practically perfect condition.  The
> calipers were rebuilt at the same time...
> 
> Brett
> -- 
> "They that give up essential liberty to obtain temporary
> safety deserve neither liberty nor safety." - Ben Franklin
> http://www.users.cloud9.net/~brett/