Our Maintenance division is dedicated to overhaul, testing and adjustment or re-engineering
of railcar suspension dampers (shock absorbers). Many operators now have dampers
Friction Snubbers rebuilt by Sigra to our high standards, rather than discarding
with OEM units at a much higher cost and long delivery delays. Sigra overhauls thousands
of Railcar and Locomotive dampers each year, helping to keep our customers' maintenance
programs on track.
We repair and test every damper according to its original specifications. Also certificates
of conformance as well as test logs and print outs for every damper overhauled are
available upon request. All dampers are tested using our Computer Aided Control (CAC)
Damper Testing machines. Each Force vs. Displacement chart (as below) is then inspected
for irregularities and the valving forces are set to the correct value.