Subject: RE: cylinder wear
Author: Ian Adkins
Date: Feb 5, 2003, 7:55 AM
Post ID: 1711880059
Rob,
If the cylinders are the original set then the lining will be chrome. If the
chrome is flaking replace them. If there is no flaking then measure the
inside of the cylinders with a mic taking measurements at the top, the
middle and bottom of the cylinder. There should be no deviation in the
measurements.
The cylinders come in three "Classes"...A, B and C. From the manual the
measurements are listed below:
Class A - 80.000mm to 80.006 (3.14963" to 3.14987")
Class B - 80.006 to 80.012 (3.14987 to 3.15010)
Class C - 80.012 to 80.018 (3.15010 to 3.15034)
Pistons need to be measured in a similar manner and the Class needs to match
that of the cylinder.
Hope this helps...Ian
| -----Original Message----- From: Rob Prins [mailto:rpr-@vt.edu] Sent: Wednesday, February 05, 2003 9:26 AM To: Loopfram-@topica.com Subject: cylinder wear I hope some of you can offer me advice. I've been on the teardown side of my first rebuild ('71 Ambo). Last night I was able to inspect the cylinders. One cylinder shows a wear mark at the top of the piston stroke that extends down about 1/4". This mark is about 1" wide and the transition between the wear area and the chrome is smooth. The other cylinder has a wear mark beginning at the top of the piston stroke that extends down about 1.5" This mark is about 3.5" wide (almost halfway around the cylinder) and the transition between the wear area and the chrome is not smooth. It feels like the chrome was chipped off. Based on my descriptions is it possible to say whether either or both cylinders should be replaced? Thanks, Rob |