Hydraulic
Gold Cup Pumps & Motors

Fully Computerized Pump & Motor Testing
In 2002 Open Loop Energy became the first Denison Hydraulics Authorized Repair Center. In 2004 when Parker Hydraulics purchased Denison Hydraulics, Open Loop Energy was certified as one of only four Parker-Denison Authorized Warranty and Repair Centers for the Hydraulic Pump Division (HPD) in North America. Currently Open Loop Energy, Inc. has two authorized locations with certified mechanics. It remains the only repair center for Parker- Denison (HPD world wide) to have fully automated computerized pump and motor testing. The test machines at both locations Winnemucca Nevada, and Safford Arizona are designed to control all test functions without human touch. Tests are recorded and stored for customer reviews. This kind of quality assurance and consistency has never before been available from any independent repair facility.

Total Hydraulic Pumps, Motors and Valve Rebuilds / Sales
Open Loop Energy rebuilds all manufactures and models of hydraulic pumps, motors, and valves.
Both shop locations are certified by Parker-Denison as factory Authorized Warranty and Repair Centers, two of only four in the United States. Parker’s strict guidelines for rebuild processes, quality control, testing, and shop facilities apply to all PMV component rebuilds. Twelve Technicians have been trained and certified to work on Parker-Denison pumps and motors.
Open Loop Energy, Inc. is also factory certified as repair centers for Duff-Norton large Jacks and ENERPAC.
The company currently has the following Parker 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 |
Sergio Flores | Authorized Repair Center Technician Arizona |
Rick Hornalez | Authorized Repair Center Technician Arizona |
Authorized ENERPAC Service Center
Open Loop Energy, Inc., as an authorized Enerpac Service Center, will continue to maintain a high level of competency, tools, and trained technicians, aimed to exceed the expectations of our Enerpac users. Enerpac products will be repaired to the highest standards using only genuine Enerpac parts and repair kits. Our commitment to Health, Safety, Security, Environment & Quality will ensure continued success.
The following have completed the Industrial Tools Service Training:
Sergio Flores | Authorized Repair Center Arizona |
Brent Kouts | Authorized Repair Center Arizona |

Open Loop Energy is a strong supporter of the training and certifications by the International Fluid Power Society. See www.ifps.org for details about the organization’s training and certification programs. Through this organizations rigid testing and certification process 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.
Name | Certification | Location |
Brandon Jennings Reed | HS, MHM | Arizona |
Brent Kouts | MHM | Arizona |
Chad C. Rolfe | AI, AJPP, AJPPCC, CC, HS,MHM,PS, S, SD | Arizona |
Garrett C. Hoisington | AI, AJPP, AJPPCC, HS, MHM,PS, S | Arizona |
Keith V. Payne | CC, MHM | Arizona |
Lloyd W. Peck | CC, MHM | Arizona |
Richard L. Henderson | MHM | Arizona |
Steven D. Holmes | MHM | Arizona |
Tate Hoisington | HS, MHM | Arizona |
Bryan E. York | CC | Nevada |
Edgar P. Cereceres | CC | Nevada |
Jonathon Paul Crews | CC | Nevada |
Raymond Thomas McFarlen | CC | Nevada |
Barton D. Hoisington | HS, MHM | Utah |

Complete Hydraulic Cylinder Repair and Manufacturing
SUSPENSIONS, STEERING CYLINDERS, PULL DOWN CYLINDERS, HOIST CYLINDERS, LEVELING CYLINDERS, ACCUMULATORS, TRAMP RELEASE CYLINDERS, EXCAVATOR CYLINDERS, HARD CHROME PROCESSES DONE IN HOUSE, MANUFACTURE OF NEW CYLINDERS
ALL MAKES AND MODELS OF ALL MANUFACTURES’ CYLINDERS
Hydraulic cylinder rebuild service by Open Loop Energy provides customers with high quality, long life repairs. Using digital instrumentation to measure bore wear, measure chrome thickness, and surface (RMS) finish cylinders of all sizes and configuration receive the maximum repair excellence. Whether a cylinder needs re-chrome, new barrel, barrel eye repair, new rod, or any other associated repair Open Loop Energy is prepared to do the full service, in house

Unique Hydraulic Cylinder Seal Specific Policy
Open Loop Energy rebuilds all hydraulic components with a “Seal Specific” policy. OEM components don’t always utilize the best possible seal or wear band material that shortens the component’s life. Through experience and research we designate the best quality and durability seal possible regardless of OEM specs. Thus the “Seal Specific” policy assures that the customer will have a long service life and the best possible sealing function. Cylinders are pressure tested above OEM specs in full retract and full extension for 30 minutes.
COMPLETE HYDRAULIC CYLINDER REPAIR AND MANUFACTURING
SUSPENSIONS, STEERING CYLINDERS, PULL DOWN CYLINDERS, HOIST CYLINDERS, LEVELING CYLINDERS, ACCUMULATORS, TRAMP RELEASE CYLINDERS, EXCAVATOR CYLINDERS, HARD CHROME PROCESSES DONE IN HOUSE, MANUFACTURE OF NEW CYLINDERS
ALL MAKES AND MODELS OF ALL MANUFACTURES’ CYLINDERS
Hydraulic cylinder rebuild service by Open Loop Energy provides customers with high quality, long life repairs. Using digital instrumentation to measure bore wear, measure chrome thickness, and surface (RMS) finish cylinders of all sizes and configuration receive the maximum repair excellence. Whether a cylinder needs re-chrome, new barrel, barrel eye repair, new rod, or any other associated repair Open Loop Energy is prepared to do the full service, in house
UNIQUE HYDRAULIC CYLINDER SEAL SPECIFIC POLICY
Open Loop Energy rebuilds all hydraulic components with a “Seal Specific” policy. OEM components don’t always utilize the best possible seal or wear band material that shortens the component’s life. Through experience and research we designate the best quality and durability seal possible regardless of OEM specs. Thus the “Seal Specific” policy assures that the customer will have a long service life and the best possible sealing function. Cylinders are pressure tested above OEM specs in full retract and full extension for 30 minutes.