Large oversized double row spherical crank pin bearings are designed to ensure the longest wear life expectancy at maximum load.
Precision tapered inserts are pressed into each crank pin hole in the crank arm ensuring the proper tapered fit with the crank pin. No removable sleeves or keys eliminating the possibility improper crank pin installation.
A large oversized double row spherical bearing is in the equalizer. This self-aligning bearing ensures constant equalization of the load to the pitman arms and crank pins.
Heavy duty I-Beam pitman arms transfer the loads between the equalizer beam and the crank pins. They are stronger and less susceptible to fatigue cracking than our competitor’s pipe pitman arms.
The upper ends of the pitman arms sit in saddles welded to the equalizer beam. The two halves are bolted together for easy assembly and disassembly. They are also greaseable.
The center bearing or saddle uses oversized straight roller bearings to ensure the longest wear life expectancy at maximum load.
The heavy-duty cast-iron brake shoes ensure maximum stopping power. It is actuated by a ratchet style lever. It is also equipped with a positive-stop locking pawl.
Involute gearing has been the backbone of the North American pumping unit industry for over 100 years. Combined with the roller bearings in the gearbox to provide the most reliable, quietest gear reducers in the industry. The oiling system is designed to allow speeds as slow as 1 stroke per minute.