PARTS · AUXILIARY HYDRAULIC KITS

Control at your thumb.

Proportional auxiliary hydraulic kits for excavators — machine-specific hard lines, proportional valves and proportional joysticks, built for your make and model. Quality kits at a much more affordable price.

  • ProportionalRoller control, both directions
  • Machine-specificLines built to your model
  • CompleteValve to joystick, one box
FEM proportional auxiliary hydraulic kit laid out: hard lines, hoses, valve plates, brackets, fittings and a proportional joystick
KITS BY FUNCTION

One kit for each job

Pick the attachments you run. Combination kits put two or more circuits on one machine, each on its own control.

01Thumb1 double-acting circuit

Open and close the thumb on a proportional roller. Feather it against the load instead of slamming it shut.

02Hammer / breaker1 one-way circuit

Flow and pressure set to your hammer, with a low-restriction return line and case drain where the hammer calls for one.

03Tilt & rotate2 circuits

Rotate and tilt each on their own roller, for tilt buckets, rotating clams, grapples and tiltrotators.

04Shear & processorHigh-flow double-acting + rotate

High-flow two-way for the jaws and a separate proportional rotate circuit for positioning.

05Plate compactor & augers1 one-way or two-way circuit

Steady, adjustable flow for compactors, augers, brush cutters and other motor-driven attachments.

06Custom / conversionBuilt to spec

Converting an on/off kit to proportional, adding a circuit to an existing kit, or something we haven't listed.

WHAT'S IN THE KIT

Valve to joystick. Nothing left to source.

Every kit arrives complete for your machine — the parts you see here, plus install instructions and a hydraulic schematic.

  1. Proportional joysticksReplacement grips with thumb rollers and buttons, pre-wired with a plug-in harness.
  2. Proportional valve blockElectro-hydraulic valve sized to the circuits and flows your attachments need.
  3. Proportional driverController that turns roller travel into smooth, adjustable flow — set per attachment.
  4. Machine-specific hard linesBoom and stick tubes bent to your machine's model, painted, and capped for shipping.
  5. Hoses & fittingsCrimped hoses, adapters, tees and quick-coupler whips with caps, cut to length.
  6. Clamps, brackets & platesLine clamps, valve mounting plates and brackets to mount the kit cleanly.
Illustrative kit layout. Configuration varies by machine.
WHY FEM KITS

Built right. Priced right.

Built for your machine

Every kit starts from your make, model and PIN. Hard lines are bent to your boom and stick, and the valve, driver and harness are matched to your machine's hydraulics and electrics.

Proportional, not on/off

Rollers give you variable speed in both directions, so a thumb can be feathered, a rotator can be positioned to the degree, and a hammer runs at the flow it was built for.

Quality without the dealer price

Proportional kits are usually the most expensive way to add auxiliary hydraulics. We build ours with quality valves, joysticks and hoses at a much more affordable price — the same way we do everything else.

Install support included

Each kit ships with a layout, a hydraulic schematic and install instructions, and our team is a phone call away while your mechanic sets it up.

1

What will it run?

Choose one or more. Two or more makes a combination kit.

2

Controls

3

Machine size

We build for CAT, John Deere, Komatsu, Hitachi, Volvo, Kobelco, Case, Hyundai, Develon, Kubota, Link-Belt and more.

HOW IT WORKS

From machine PIN to install

  1. 01Send your machine

    Make, model, PIN and the attachments you want to run. Photos of the main valve and the joysticks help.

  2. 02We spec the kit

    We confirm circuits, flows, joystick layout and line routing for your machine, then send a complete quote.

  3. 03We build it

    Lines, valve, driver and harness are built and checked as a kit for your machine.

  4. 04Install & set up

    Your mechanic installs it with our instructions and schematic; we help set flows for each attachment.

WHAT TO SEND

Three details get you a faster answer.

01Machine modelProvide the make, model and machine plate number when known.
02Machine PINThe PIN on the machine plate tells us exactly which lines and valve fit your machine.
03Valve & joystick photosThe main control valve, both joysticks and the machine plate.
01

Your contact details

Tell us where to send the quote and how our parts team should reach you.

Email is required when Email is selected. A phone number is required for Phone or Text message.
02

Machine and part details

We use these details to identify the correct part before quoting.

Kit in this request
  • FunctionsThumb
  • ControlsProportional joysticks
  • Machine size10 – 25 t
03

Add identification photos

Photos are optional, but clear, complete images help us return an accurate quote without delays.

Your contact, machine and photo details are saved with this request so the FEM team can prepare and follow up on an accurate quote.
QUESTIONS

Kit FAQ

What's the difference between a proportional kit and an on/off kit?

An on/off kit opens the circuit fully when you press a button — the attachment runs at one speed. A proportional kit uses a roller and a proportional valve, so speed follows how far you move the roller. That control matters most on thumbs, rotators, tilt buckets and shears.

Will it fit my excavator?

Kits are built per machine. Send the make, model and PIN and we'll confirm the kit for your machine before you order — including anything that differs from a standard install.

Can I run more than one attachment?

Yes. Combination kits run two or more circuits — for example a hammer and a thumb, or tilt and rotate — each on its own control.

Can my own mechanic install it?

Yes. Kits ship with install instructions, a schematic and a parts list, and our team supports the install by phone. Tell us if you'd like help finding an installer near you.

How much does a kit cost?

It depends on the machine, the number of circuits and the controls. Every kit is quoted to your machine, with shipping — and priced well below what proportional kits usually cost.