RE: Poly bushings

[Richard Brake <richard.brake@domain.elided>]

Are these bush's Super-Pro and if so have you got the SPF No.? I can
then check if they are the correct part. I could'nt read your E-mail
sketch (lost in translation). However the Super-Pro bushes I have used
do look different with an ear on each side of the bush, this stops the
Track Control Arm form wandering and prevents metal to metal contact
between the Track Control Arm and the Front Suspension Cross-member. The
bushes are tight to fit (squeezing in the polyurethane ears distorts it
like hell) but unlike some rubber bushes I have fitted the polyurethane
wont tear. The main body of the polyurethane bush is smaller in diameter
than the rubber one.This is because the polyurethane bush is designed to
allow the arm to rotate easily on the correct axis, whereas the rubber
bush is compressed when installed and all movement is from the rubber
distorting.   

Hope this helps.


Richard  Brake



	-----Original Message-----
	From:	Glenna Hall [SMTP:gshall@domain.elided]
	Sent:	11 July 1998 06:38
	To:	stag@domain.elided
	Subject:	Poly bushings

	I received some poly bushings from Rimmer's recently  and now
find 
	myself  in need of  the group's council.   First, there is the
shape
	of the things.  I assumed they would be polyurethane versions of
the
	original bushes, as did apparently, Graham, with the drag strut
bushes.
	But, the lower control arm ones are quite different  also.  I
have a new spare
	to compare the poly one to.  In  side profile they look like so:
				original
poly
	                   _____________                             _
	                     _
	                  /                              \
	  |  \______________/  |
	                 /                                \
	  |                                       |
	                | - - - -  - - - - - - - - - -|
|
	- - - - - - -- - - -  - - - -- - |
	                |-  - - - - and so forth.

	They are the same length, but differ in diameter by more than
1/8 inch--the
	poly 
	being smaller.  Now, I guess the rubber bushes are somewhat
bigger in dia
	than the hole in the arm, judging from people's descriptions of
squashing
	them in
	(especially the rear trailing arms).  And the poly ones have a
steel sleeve
	that is
	about 1/16 inch bigger than the ID of the bush, so it may
expand a little.
	 I'm not
	planning to install them for several months yet, so don't have
the arm to
	measure
	its hole. Is there anyone on the list with experience with these
things
	that can 
	allay my fears that it won't fit (too small)?  Or that these are
all wrong
	parts.

	Richard Hall
	73 Stag
	60 Morris Minor Traveller



	Glenna S. Hall
	gshall@domain.elided