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General Service

  • free frozen slides
  • chemically clean all parts
  • adjust valves - straighten slightly warped valve cases and
    light-lap if necessary, adjust valve travel, check felts and
    bumpers and replace if necessary
  • true and/or tighten slides
  • remove dents accessible without disassembly
  • solder loose joints and stays

Extended Service

  • disassemble soldered parts
  • straighten branch tubing and/or slides
  • remove severe dents
  • straighten body
  • clean loose joints and solder
  • straighten and lap warped valve cases
  • overhaul rotary valves - build up with copper plate, lap
    into tapered valve case, repeat this procedure until the
    valve and case are round and snug-fitting, plate with
    nickel for durability