Parker Chelsea makes PTO and pump installation simpler and more reliable on refuse truck, fire apparatus and pumper cleaner trucks with the 897 Series PTO. Torsional vibrations from diesel engines prematurely wear out mating PTO and pump splines and the large physical size of the pumps have always been a challenge. Chelsea's 897 series is designed with these challenges in mind. The 897 provides maximum clearance and the wet spline system provides an extended shaft life. It is available with five speed ratios and eight output options providing broad coverage for all application requirements.