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C.H. Brown Steam Engine
Restoration (Part 2)
CAMA Volunteers Restore this Historic Engine

As the restoration process progressed,  a number of mechanical issues came to light that had to first be dealt with before the C.H. Brown engine could safely be test run. Conrad Milster, chief engineer at the Pratt Institute in Brooklyn, NY, has long been our go-to guy when it comes to steam engine setup and repairs.  Conrad felt that it was necessary to carry out a number of additional repairs of worn parts so as to assure that once running, the C.H. Brown would give us many years of trouble-free operation. Some of the old repairs to broken parts went back many years, long before the engine ever arrived at CAMA,  and some of these repairs will remain unaltered.  Because of the nature of some old repairs, the C.H. Brown will not be allowed to ever run "full steam ahead", so as to maintain a reasonable safety margin for future generations to come. Not knowing the history of previously made repairs, it is safer to err on the side of caution, and treat our biggest steam engine with the reverance due an aging senior machine.
C Milster at Brown    
Exhaust valve removal
ABOVE:
Conrad Milster prepares to remove the main steam line to make modifications for an in-line lubricator that provides steam cylinder oil the the piston.
ABOVE:
Conrad prepares to remove connecting rod-end exhaust valve hardware to gain access to the slide valve assembly.

 C Milster dashpot 
  Conrad and valve parts
ABOVE:
Conrad replaces a cleaned inlet valve dashpot.  The dashpots provide an air cushion that modulates inlet valve movement during steam engine operation thus improving efficiency.
ABOVE:
Conrad stands next to the myiad of parts that make up the valve gear on the C.H. Brown engine.  This level of disassembly was required to locate and repair worn parts.
babbit bushings 
   Conrad on exhaust valve
ABOVE:
Photographed at the Pratt Institute machine shop,  a newly Babbitted bushing is turned to final dimensions. Babbitt is a tin or lead based soft metal alloy widely used for bushings in antique machinery.
ABOVE:
Conrad reassembles the far side exhaust valve following repair of the slide valve.

As of 8/17/09, Conrad Milster is well along in reassembling the C.H. Brown engine. All planned repairs to parts have been completed. It  is hoped that the C.H. Brown will be steamed up at the 2009 Fall Festival. 

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This page was created on 8/17/09 by Jim Anderson