Cat 315 track excavator equipped with the Dymax Rail Rider X2-15T detachable hi-rail attachment on rail in an open field

ON RAIL WHEN YOU NEED IT. EXCAVATOR WHEN YOU DON’T.

Built to handle real rail work without turning your excavator into a dedicated machine.

DYMAX RAIL RIDER X2-15T

HI-RAIL ATTACHMENT FOR 13-15T EXCAVATORS

Built for EVERYDAY WORK

The Rail Rider X2 is a true attachment — not a permanent excavator conversion.

Its patent-pending wedge-locking adapter system creates a strong, stable platform without cutting or welding on the host machine.

Installs in days, not months, while preserving excavator flexibility for off-track work when needed.

Available for Cat 313/315, Deere 135/145, Komatsu PC138 & More.

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Stylized render of the Dymax Rail Rider X2-15T detachable hi-rail attachment for 13-15-ton track excavators including Cat 313/315, Deere 135/145, and Komatsu PC138 class machines

APPLICATIONS

  • Bridge and Tunnel Work
  • Tie Renewals
  • Signal & Utility Construction
  • Right-of-Way Vegetation Management
  • Ballast & Subgrade Rehabilitation
  • New Track Construction

WHAT YOU GET WITH THE X2-15T

It’s Hi-Rail Simplified

Dymax Rail Rider X2-15T detachable heavy-duty hi-rail frame installed on a track excavator without cutting, welding, or permanent machine modifications

NO MACHINE MODIFICATIONS

Detachable heavy-duty frame designed for fast installation and simplified fit-up.

Close-up of the Dymax Rail Rider X2-15T hi-rail undercarriage on wood ties, showing 16-inch steel rail wheel and replaceable brake shoe on a Cat track excavator
16-INCH RAIL WHEELS

Available in insulated or non-insulated designs, with replaceable brake shoes. Designed for heavy-duty service life.

Cat 315 track excavator equipped with the Dymax Rail Rider X2-15T hi-rail system, shown traveling on rail, working off-rail with stabilizers deployed, and in close-up detail of the integrated rail clamp and stabilizer assembly
ENHANCED STABILITY

Available with stabilizers, rail clamps, or both — operators can perform heavy over-the-side work directly from the hi-rail position without setting the machine down.

Close-up of the Dymax Rail Rider X2-15T pre-hosed hydraulic bulkhead connections with labeled hoses, integrated manifolds, and Magnum filtration for simplified dealer or in-shop installation
QUICK INSTALLATION

Ships pre-hosed — with labeled hoses, bulkhead connections, integrated manifolds, advanced valve technology, and Magnum filtration.

Close-up of the Dymax Rail Rider X2-15T 2-speed hydrostatic drive system delivering 18-20 mph travel with strong towing and grade-pulling power, operated through the standard excavator travel pedals
POWERFUL 2-SPEED HYDROSTATIC DRIVE SYSTEM

Travel up to 18–20 mph with strong towing and grade-pulling power. Operates through standard excavator travel pedals.

Close-up of the Dymax Rail Rider X2-15T spring-applied hydraulic release (SAHR) braking system, providing dependable stopping power with a manual hydraulic hand pump backup
FAIL-SAFE SAHR BRAKING

Spring-applied hydraulic-release brakes provide dependable stopping power. Manual hydraulic hand pump supplied.

Close-up of the Dymax Rail Rider X2-15T solar-powered red and white directional LED lighting that illuminates track based on travel direction from a self-contained power source
SOLAR-POWERED LED LIGHTING

Red and white track illumination based on travel direction, from a self-contained power source. Rail sweeps clear debris during operation.

Dymax Rail Rider X2-15T FRA installation kit including beacon, fire extinguisher, retroreflective tape, decals, and first aid kit for U.S. and Canada rail markets
FRA INSTALLATION KIT

Beacon, fire extinguisher, tape, decals, and first aid kit. Available in U.S. / Canada markets.

SPECIFICATIONS

Available Now: Cat 313/315, Deere 135/145, Komatsu PC138 & more. Contact DymaxRail for excavators not listed.

Model
Description
Weight (lbs)
DX-RRDH-X2CS-CAT313-HX-15T 

Rail Rider Hydrostatic-X2 Series Mount with stabilizers and rail clamps-For CATERPILLAR 313 OR 315

WEIGHT: 11,600 lbs
DX-RRDH-X2CS-CAT315-HX-15T

Rail Rider Hydrostatic-X2 Series Mount with stabilizers and rail clamps-For CATERPILLAR 313 OR 315

WEIGHT: 11,600 lbs
DX-RRDH-X2CS-JD135-HX-15T

Rail Rider Hydrostatic-X2 Series Mount with stabilizers and rail clamps-For DEERE 135P OR 145P

WEIGHT: 11,600 lbs
DX-RRDH-X2CS-JD145-HX-15T

Rail Rider Hydrostatic-X2 Series Mount with stabilizers and rail clamps-For DEERE 135P OR 145P

WEIGHT: 11,600 lbs
DX-RRDH-X2CS-KOMATSUPC138-HX-15T

Rail Rider Hydrostatic-X2 Series Mount with stabilizers and rail clamps-For KOMATSU PC138
DX-RRDH-X2INSTALLDMX-HX-15T

DymaxRail installation @ Factory
DX-RRDH-X2INSTALLREM-HX-15T

Remote installation assistance. (priced per customer)

Design and specifications are subject to change without notice. For custom solutions, contact DymaxRail Sales: 1-800-530-5407.

STANDARD FEATURES – 15-ton
  • Standard rail gauge (1435mm/56.50 in)
  • PATENT-PENDING Removable machine adapter with full undercarriage support.
  • High-strength front and rear lift groups with integrated load checks.
  • Hydraulic release, spring-applied shoe brakes on all wheels for maximum holding force.
  • Replaceable DymaxRail non-insulated wheels. (Upgrade available.)  
  • Rail sweeps and underframe bolt-on guard package.
  • Single drive axle with 2-speed motor and gearbox.
  • Tow hitch on both sides; 4-foot tow-bar provided.
  • FRA installation kit; beacon, fire extinguisher, tape, decals, first aid kit. Available in US/CAN markets. 
  • Four (4) hydraulic 3rd rail-type stabilizers.
  • Four (4) hydraulic rail clamps.

Design and specifications are subject to change without notice. For custom solutions, contact DymaxRail Sales: 1-800-530-5407.

OPTIONS – 15-Ton
  • Insulated Design
  • Roller Clamps
  • Narrow Gauge Configurations
  • Broad Gauge Configurations
  • Twin axle drive for high-capacity towing

Design and specifications are subject to change without notice. For custom solutions, contact DymaxRail Sales: 1-800-530-5407.

HYDRAULIC REQUIREMENTS
The Rail Rider X2 operates directly from the standard excavator travel and auxiliary controls. For 15T-class excavators, a factory blade configuration is required, as the blade hydraulic circuit is utilized to raise and lower the railgear system.
SHIPPING DIMENSIONS
39 inches height x 247.00 inches length (with stabilizers and clamps installed) 
INSTALLATION
Center frame and railgear arrive pre-hosed and ready to install. Most setups take a few days — at your shop, the Dymax factory, or a partner dealer location. An excavator car configuration is also available.

We’ll work with you to provide the best packaging, shipping, and installation solution—helping get your machine on rail faster. 

FAQ

No new controls to learn. The X2’s hydrostatic rail drive operates through the excavator’s existing travel controls, giving the operator full control of speed, braking, and performance on rail. 
Yes. The Rail Rider X2 is available with hydraulic rail clamps and stabilizer systems, allowing operators to perform many tasks directly from the rail position without constantly repositioning the machine or setting the excavator down off the rail. 
Yes. DymaxRail is actively developing dealer and support channels for domestic and international markets. 
Traditional conversions often permanently modify the excavator undercarriage. The X2 takes a different approach with a removable attachment-based system designed to reduce machine alteration while improving flexibility and preserving machine value. 

RELATED PRODUCTS

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