EXCAVATOR HYDRAULIC KITS
Since 1996, HCT has been custom-engineering high quality, easy to install, and durable by design hydraulic kits to operate attachments or combination of attachments on EXCAVATORS
HydrauliCircuit Technology (HCT) offers industry-leading hydraulic kits.
– We stand behind it with best-in-class PRODUCT SUPPORT.

- BOLT ON Design
- Pulse MIG WELDED Tube Ends
- SOLID STEEL clamps
- HEAVY WALLED tubing
- POWDER COATED finish
KIT TYPES OFFERED
COMPLETE KITS (PRIMARY)
Complete kits include Stick, Boom, Valve, Cab Controls, Instructions and Professional Packaging.
- Single Acting – Breaker, Compactor, Brushcutter
- Double Acting – Thumb, Shear, Grapple
- Dual Purpose – Combo
- 2nd Member or 3rd Member
UPGRADE KITS (PRIMARY)
Change or enhance existing function of HCT or Factory Kits
- Pilot Controls
- Increase line size
- Add Brushcutter or Magnet capability
ADD-ON ROTATION / TILT KITS (SECONDARY)
Add a second function to HCT or Factory kits
- Fits on / around HCT or Factory kits
- Non-proportional or Proportional Valves and Controls
- Case Drain (1/2” or 3/4” ID)
BROCHURES and FLYERS
- HCT Slat Guard
- HCT Guardian Front Guard
- HCT Defender Series Window Guards
- HCT Premium Joysticks – Monitor Control Options
- HCT Stick Tubing w/Thumb Tee
- HCT Tube & Clamp System
- HCT Coupler Lock Kits
- HCT Coupler Control Box
- HCT Coupler Control Switch
- HCT Replacement Parts
- HCT Trifold Brochure
- HCT Case Drain
- HCT Case Drain Kits & Guardian Guard
KIT DESIGNS
Fit, Form and Function
- Based on in-house installation and qualification
- Tubes conform and Mounts bolt on to existing brackets provided by OEM
- Design meets/matches OEM kit specifications
- Installer approved, step by step instructions

Machines at our 40,000 sq.ft Research, Design and Manufacturing facility.
Stick-Boom
Features:
- PREFORMED TUBE assemblies fit your boom profile and tube placement keeps a compact profile with minimum-to-no overhang
- BOLT ON clamps and brackets for Stick and Boom
- SPRING GUARD protection for Stick to Boom hoses for added protection
- POWDER COATED Tube assemblies and BOLT ON brackets for best finish and longer life


* Powder coating provides a protective coating that is UV resistant and enhances the life of the components in addition to improving the look and finish of the installed product. There is no need to paint any of these components, saving you time, and labor.
TUBE-HOSE CONNECTIONS
HCT Tubes connect directly to the hose assembly and DO NOT require a male-to-male union to achieve this.
HCT connections minimize the chance for leaks to develop, and we meet or exceed SAE published standards:
- OEM style ORFS or CD62 4-bolt Flange Connections
- Higher Safety Standards
- Efficient Designs with fewer connections
HCT controls the process in house from start to finish by manufacturing tube assemblies using Pulse MIG welding.

Features:
- BOLT ON STEEL CLAMPS
- THICKER WALL TUBING
- WELDED ORFS CONNECTION
- WELDED Code 62 FLANGE CONNECTION


High Quality Components: Features & Applications
Extremely versatile and reliable valve for use in the pilot system of your excavator. The proportional capability gives precise control that will be appreciated when operating thumbs, shears, or rotation circuits.
This double-acting valve also works well on single-acting circuits as well.
Features include:
- Rubber boot keeps this valve free from the effects of dirt and water.
- A mechanical locking device for safety. This feature allows the unit to function as a footrest.
- Mounting brackets are included, but the existing bolt hole pattern matches existing floor cut-outs on many popular excavators.
Super tough lightweight, proportional joystick replaces your existing joystick. Light touch buttons reduce operator fatigue.
The Proportional slider is used to operate a cylinder or rotate function. A trigger switch can be used to operate an existing function, such as a horn or “power boost”.
Features include:
- Allows precise control of the attachment.
- Field adjustable driver board.
- Adapter bushings are available in various diameters and thread types.
- Switches rated up to ten million cycles.
- A pre-wired harness is included for most applications.
- The ergonomic design fits your hand comfortably
Kits integrate seamlessly with onboard OEM Monitor for ;

- Flow Setting
- Function Select
- 2-pump flow
Features Include:
- Slider Proportional (requires Kit Control Unit)
- 3 Pushbuttons (non proportional)
- 1 Trigger
- Prevents actuation of Auxiliary kit in DIG mode
- Recommended for: SHEAR/DUAL PURPOSE KITS/THUMB/ROTATION/GRAPPLE/AUGER
Protect your excavator and attachment against contamination by using one of our case drain filter assemblies. These filters are available as add-on accessories and optional.

Features include:
- Durable, compact design
- Quick, easy and economical element change-out.
- Porting – SAE ORB
FINISH AND PACKAGING
- EASY IDENTIFICATION:
Labels on components with item number correlate to Bill of Materials for accurate identification during installation. Cab sticker with Serial number helps identify kit for support and parts replacement. - HEAVY DUTY CRATES:
Ensures product reaches safely and securely. - SECURELY PACKAGED:
HD plastic sleeves and tie downs to secure. - SINGLE CRATE SHIPMENT:
Minimizes chance of lost or damaged shipment. This ensures you don’t have to search for missing boxes during installation, losing valuable shop time.
(click on image to enlarge)
Frequently Asked Questions About Excavator Hydraulic Kits
An excavator hydraulic kit, also called an auxiliary hydraulic kit or attachment hydraulic kits, allow an excavator to power hydraulic attachments. These custom designed kits integrate with the excavator’s hydraulic system to operate attachments mounted on the boom or stick.
Without an auxiliary hydraulic kit, many common excavator attachments cannot operate. A properly installed excavator hydraulic kit allows operators to run tools such as:
• Hydraulic thumbs
• Grapples
• Demolition Shears
• Hydraulic breakers
• Tilt buckets
HydrauliCircuit Technology, LLC excavator hydraulic kits allow customers to increase the functionality and productivity of their excavator.
HCT excavator hydraulic kits are designed to be compatible with most of the popular excavator brands and models used for construction, land clearing, and demolition.
Common brands include:
• Komatsu excavators
• John Deere excavators
• Hitachi excavators
• Caterpillar excavators
• Hyundai excavators
• Takeuchi excavators
• Case & Link-Belt excavators
Because excavators vary by model, year, and hydraulic configuration, it is important to match the correct auxiliary hydraulic kit to the specific excavator model and series. HydrauliCircuit Technology works with equipment dealers to review the application and ensure proper kit compatibility.
HydrauliCircuit Technology, LLC focuses on manufacturing high-quality excavator hydraulic kits and excavator guards designed for durability and reliability in demanding job site environments.
Key differences often include:
• Full Length Tube Assemblies
• Thick-Walled Tubing
• Welded Tube Ends
• Bolt On Design / Powder Coated
• Single O-Ring Connection
By specializing in excavator hydraulic systems, HCT provides dependable solutions that support hydraulic attachments and improve machine functionality.
HydrauliCircuit Technology, LLC designs and manufactures excavator hydraulic kits and excavator guards in Georgia.
Manufacturing specialized hydraulic kits and guards in-house allows the company to focus on:
• Superior Engineering
• High Quality Manufacturing
• Lifetime Support
• Innovative Technology
Customers looking for excavator hydraulic kits often choose HCT because we control every aspect of the process. Our vertically integrated operation includes in-house design, tube welding, tube bending, hose assembly crimping, metal bracket fabrication, and powder coating, all under one roof! This means tighter quality control, faster delivery, and the flexibility to meet your specific needs.











