Parker Chelsea, the leading power transfer solutions provider to the work truck market, makes PTO and pump installation simpler and more reliable on oil field exploration and maintenance trucks. Because of the large physical size of the pumps used on these applications, clearance has always been a challenge.

Chelsea’s new 899 Series was designed to provide maximum clearance for the 4700 Series transmissions. Another challenge is the torsional vibrations from today’s diesel engines that prematurely wear out mating PTO and pump splines. The Wet Spline System that lubricates the mating PTO and Pump shafts will increase the life of these components seven to 10 times longer than a dry mating connection.

The 899 features 6 speed ratios, 8 output types and is a constant mesh shifter which is an excellent  option for variable displacement piston pump applications.