Parker Chelsea says its new 899 Series 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 in such applications, the company says, clearance has always been a challenge. The 899 was designed with this in mind 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 is claimed to increase the life of these components seven to 10 times longer than a dry-mating connection.
The 899 features six speed ratios, eight output types, and is a constant-mesh shifter which is a useful option for variable-displacement piston pump applications.