The 25C features the latest evolution machine control system with a larger transmitter. A new generation hydraulic system features pressure and flow on demand as well as fewer components and increased component life. Both the hydraulic and VFD systems provide machine protection.
The machine operates a broad range with maximum rated cutting head power. The cutter-head motors are protected by a torque-limiting clutch to prevent damage in the event of a rockstrike. The high-strength steel drums are constructed with 2-inch thick walls with maximum bit tip standoff.
A 38-inch conveyor provides higher throughput with a bi-directional discharge forming an integral part of the mainframe. A hydraulic take-up maintains proper chain tension for all conveyor positions and extends chain life.
The one-piece highly robust frame uses a 2.9-inch steel plate—50% thicker than competitive machines, according to Bucyrus. The heavier, rigid frame allows more efficient cutting when sumping at the top of the seam and ripping to the bottom. The support frame fabricated from high-strength steel has massive 6-inch steel legs. The largest-in-class boom pivot bores feature hardened steel pins and replaceable bushings. The robust clevis and frame have fewer weld joints subject to tension.
The 25C is designed for easy maintenance with independent cutter heads, traction, control systems and wethead technology. Diagnostics are located for easy access. www.bucyrus.com