Mega Coal Haulers

Bottom Dump Trailers

Genuine Mega Design for
Coal Haulers (MCH) and Dirt/Rock Trailers (MBD)

Mega coal haulers are designed for use with off-highway trucks converted into tow tractors. The complete Mega solution includes the hitch system, and modifications to the chassis hydraulic, electrical, braking and computer control systems. Mega coal haulers are designed to comply with OEM tire and tractor axle load limits and meet applicable ROPS, emergency steering, and braking performance criteria. Our design maximizes the use of OEM content in the design of the trailer, suspension, and wheel and brake system components.

Mega bottom dump trailers are designed for use with materials of greater density and higher abrasive properties. The MBD utilizes the same hitch, deck and fender system as well as the hydraulic, braking and control systems of the MCH.

Mega trailers can be purchased for integration with a dealer-provided truck or as a complete solution with a Mega-provided truck. Purchasing your complete solution directly from Mega streamlines the ordering process and significantly reduces the complexities related to delivery timing and shipping.

Please contact our Mega Sales Team regarding shipping information and models not listed.

Mega Model Prime Mover
MCH CAT 777
MCH CAT 785
MCH CAT 789
MBD CAT 777
MBD CAT 785
MBD CAT 789

MBD trailers include the following standard features. Feature specifications may vary by model. For additional information, contact our Mega Sales Team.

The Mega ball-type hitch assembly is durable and easy to maintain.

Mega's conversion to tow capability provides:

  • Brake cooling activation and integration
  • Brake cooling scavenge pump
  • Brake cooling tuning
  • Brake activation sequencing
  • Trailer accumulators and slack adjusters
  • All tractor and trailer brake activation hosing

The doors are fabricated using formed plates to develop a rigid box section capable of withstanding high impact loads. They are also designed with a minimal gap to reduce material leakage. Mega doors use chrome plated pins with greaseless bushings for long life and low maintenance.

The Mega door valving system divides flow equally to synchronize door movement. A series of check and over-center valves prevent door drift. The four door activation cylinders are located externally at the front and rear of each door.

The electronic turn limit Indicator provides an audible and visual warning to the operator if the trailer is approaching the maximum angle of rotation.

Mega tanks are abrasive blasted prior to application of anti-corrosive primer. The exterior top coat is color matched to the current manufacturers color.

Gooseneck includes two manholes providing access to hydraulic componentry and electrical cabling.

The Mega bottom dump trailer includes an access ladder to the top of the gooseneck. Our standard ladder features tread grip rungs for a sure-footed grip and hand rails at the top of the ladder allowing safe access to the top of the gooseneck.

The hitch deck and fender arrangement protects chassis componentry and provides access to the transmission through hinged doors. Includes ball hitch receiver group, drive tire fender group and steel grate deck assembly.

Mega bottom dump trailers include LED lights for long life and low maintenance:

  • Stop, turn, tail, backup lights
  • Side marker lights
  • Rear trailer work lights
  • Side backup light
  • Backup alarm

Steel plate markers welded on each side of the trailer to indicate optimal loading area.

Manual lubrication banks are provided at the front and rear door pivot points and at the trailing axle suspension cylinders.

Mega mud flaps offer cylinder protection and are located fore and aft of drive tires, trailer doors and trailing axle tires.

Mega protects your investment by providing a one-year warranty against defects in materials and workmanship. Extended warranties are available for purchase. Visit our Warranty Page for more information.

Mega provides a heavy duty bumper with tow hooks to support pushing and towing of the trailer.

Mega provides a complete set of technical manuals detailing installation, operation, maintenance, inspection and replacement parts. Additional manuals are available for purchase. Visit our Technical Manuals Page for more information.

The Mega trailer axle assembly includes:

  • Trailing axle and rims
  • Suspension
  • A-frame
  • Lateral link
  • Cooling and activation lines
  • Brake activation components
  • Payload sensing circuit

Your standard MBD trailer can be configured with these optional features. Availability and specifications may vary by model. For additional information, contact our Mega Sales Team.

Additional sets of manuals are available for purchase. Mega bottom dump trailers include a complete set of technical manuals detailing installation, operation, maintenance, inspection and replacement parts. Visit our Technical Manuals Page for more information.

The auto-lube grease system provides lines from the lubrication banks to the gooseneck. It integrates the manual lube banks with the tractor auto lubrication system.

The in-cab indicating system notifies the operator when the doors have reached a pre-determined open position. The system is designed to prevent creation of large windrows during stockpile operations.

The mechanical turn limit indicator provides a visual warning to the operator if the trailer is approaching the maximum angle of rotation.

onsite assistanceThe Mega Product Support team offers on-site technical assistance, service advice and training to facilitate implementation and help reduce field assembly and component repair time.

This option extends the standard push block bumper to provide additional clearance between the pushing dozer and trailer tires.

The reinforced top rail cap protects the top rail of the trailer from damage from loading tools.

The optional spill guard is an enclosed box structure which provides a smooth transition to the gooseneck for shedding material.The spill guard is fitted at the Mega factory but requires field installation.

Flexible brake cooling lines at the trailer axle help prevent tube damage while performing stockpile operations.

The Mega heavy duty bumper extension with wrap-around design provides additional protection for the tires.