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


HydrauliCircuit Technology Facility



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.

* 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.


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.

High Quality Components: Features & Applications

Pedal Valve - Proportional

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.
Standard Joystick Handgrips - Proportional

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
PREMIUM Joystick Handgrips – Proportional for Komatsu/CASE/LBX/Deere machines

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
Case Drain Filters

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




  • Clear, easy to follow instructions
  • Photos
  • CAD drawings
  • Step-by-step instructions

(click on image to enlarge)

Single-Acting Primary Kit

To Operate:  Breakers / Compactors.
These attachments require pressurized oil in one direction and low back pressure on the return. 

Double-Acting Primary Kit

To Operate: Thumbs / Shears / Crushers / Grapples.
These attachments typically utilize a hydraulic cylinder and require a bidirectional circuit to open / close.

Dual-Purpose Primary Kit

To Operate: Breaker/Shear or Breaker/Thumb.
These kits can switch between single-acting (Breaker) and double-acting (Shear/Thumb) functions with a manual or electrical 3-way valve.

Secondary Rotation Function

To Operate: Rotate function on a Shear/Crusher.
These attachments typically use a hydraulic motor and require a case drain line. A bidirectional circuit is required to rotate clockwise / counterclockwise.

Ready To Get Started?

Contact HydrauliCircuit Technology today for a free consultation.