Technical Services

The Technical Division at Open Loop Energy consists of Field Technicians, Engineers, Designers, CAD Operators, Machinists, Welders, and Mechanics. When a customer comes to us with a problem, Field Technicians assess the problem, consult with Engineering, machining, welding, and design to solve the issue with minimal down time for you, the customer. Most of the time Technical Services can find a way to rebuild or even enhance the product in question. Our commitment is to improving product life and customer service.


Open Loop Energy is a strong supporter of the training and certifications by the International Fluid Power Society. See for details about the organizations training and certification programs. Customers can be assured they receive the high degree of fluid power knowledge in the industry from designated OLE employees. In addition an OLE employee serves on the board of directors for the IFPS.

Employee  IFPS Certification                                         Location
Garrett Hoisington AI, AJPP, AJPPCC, HS, MHM, PS, S Arizona
Chad Rolfe AI, AJPP, AJPPCC, CC, HS, PS, S, SD Arizona
Tate Hoisington HS, MHM Arizona
Bart Hoisington HS, MHM Utah
Rocky Phoenix MMH, CC, MHM, MHT (Also on Board of Directors) Nevada
Nicholas Katavich CC New Mexico
Brandon Reed HS, MHM Arizona
Brent Kouts MHM Arizona
Bill Peck MHM Arizona
Doug Holmes MHM Arizona
Kevin Marley HS, MHM, MHT Nevada
Colton Morris MHM Arizona
Keith Payne MHM Arizona
Edgar Cereceres CC Nevada
Bryan York CC Nevada
Jonathon Crews CC Nevada
Ray McFarlen CC Nevada


Open Loop Energy is proud to be an Authorized Repair and Warranty Center for Parker-Denison Hydraulic Division for  Pumps, Motors, and Valves. To meet the requirements for this certification OLE must maintain certified technicians. The company currently has the following Parker-Denison Hydraulic Pump Division certified technicians:


Garrett Hoisington  Factory Certified  Arizona

Bart Hoisington       Factory Certified  Utah

Chad Rolfe              Factory Certified  Arizona

Charles Pruitt           Factory Certified  Arizona

Rocky Phoenix         Factory Certified  Nevada

Brandon Reed          Factory Certified  Arizona

Bryan York                Factory Certified  Nevada

Tate Hoisington        Factory Certified  Arizona

James Adame           Factory Certified  Arizona

Ray McFarlen           Factory Certified  Nevada


Open Loop Energy also has personnel trained in the Six Sigma Process for quality control and continuous improvement. Fifteen individuals have been trained and certified in the Six Sigma Methodology.

Chase Fite – Six Sigma Black Belt Professional

Garrett Hoisington – Six Sigma Black Belt Professional

Erin D. Motes – Six Sigma Black Belt Professional

Tate Hoisington – Six Sigma Black Belt Professional

Bart Hoisington – Six Sigma Black Belt Professional

Brandon Reed – Six Sigma Black Belt Professional

Chad Rolfe – Lean Six Sigma Black Belt Professional

Colton Morris – Six Sigma Green Belt Professional

Doug Holmes – Six Sigma Green Belt Professional

Keith Payne – Six Sigma Black Belt Professional

Don Trowbridge – Six Sigma Black Belt Professional

Nick Katavich – Six Sigma Black Belt Professional

Jonathon Crews – Six Sigma Black Belt Professional

Ray McFarlen – Six Sigma Black Belt Professional

Anissa Johnson – Six Sigma Black Belt Professional


  • Caterpillar 16G and 16H Park Brake Modification
  • Track Inching Drive for Dozers
  • Water Truck Cargo Pump Soft Start and Stop
  • Hydraulic Snubber Rebuilds
  • Filtration Systems for Fuel and Oil
  • Core Splitter



The Technical Division at Open Loop Energy has implemented many filtration solutions for users of diesel fuels and lubricants to ensure that the equipment using the fluids for production is kept running reliably.

As cleaner diesel technology advances, the manufactures of fuel system components are requiring much cleaner fuel to operate with. So with this new technology, Open Loop Energy has been helping customers address the problems with receiving ,storing, and delivering clean fuel to the more sensitive equipment by using Donaldson Clean Fuel & Lubricant products. This product is customizable to meet the needs of all users and is designed specifically to provide a single pass filtration system to meet OEM requirements.

Open Loop Energy has also implemented easy-to-service filtration systems for maintenance shops and process lubrication equipment. This equipment provides filtration for large mills, crushers, and gear boxes found in the mining industry. Maintenance shops outfitted with the latest filtration technology can now deliver clean lubricants to all the equipment for superior reliability.


Open Loop Energy provides on site fluid filtration. Fully equipped trucks go on site to "Kidney Loop" hydraulic systems on large mining equipment. High volume pumps and quick disconnects can clean the equipment's oil in a minimal amount of time without the machine running. On board particle counters monitor the fluid cleaning process and provide results in ISO Standards for customer review.

Filtration Carts

Our company designs and fabricates custom oil filtration carts for use in maintenance shops. These portable filtration carts "kidney loop" the oils to meet manufactures ISO requirements. Carts can be rolled, forklifted, or crane lifted for versatility. On board heaters are installed to facilitate the filtration process.