Come see us at CIM Connect in Vancouver May 12-15, 2024 @ booth #1819


CAT 777F Trailer Brakes and Cooling

Customer:   Maxter – Finning CAT JV

About The Project

MEDATech Engineering was commissioned to design the braking and brake cooling system on a trailer being attached to a CAT 777F haul truck and supplied to TransAlta coal through a MAXTER and FINNING JV. Previously, the CAT haul truck version 777D had air-over-hydraulic braking systems. Subsequent to version “D” however, CAT changed to electric-hydraulic control on the braking system on their “F” model.


  • Major challenge to integrate tractor and trailer braking circuits into a single system.
  • Testing and certification in accordance with several industry standards and regulations:
    • ISO 3450 : 1996 Earthmoving machinery − Braking systems of rubber-tyred machines − Systems and performance requirements and test procedures.
    • CAN/CSA-M424.3-M90 Braking Performance – Rubber-Tired, Self-Propelled Underground Mining Machines
    • Alberta OH & S Code (2009), Part 36 – Mining – Rubber-Tired, Self-Propelled Machines
  • Trailer service brakes must be actuated from the standard CAT 777F in-cab brake pedal with time delay to prevent “jackknifing”.


  • Developed and tested a robust trailer brake and cooling circuit that easily integrated into the existing CAT 777F tractor.
  • Trailer GVW is 545,000 lbs (272.5 tons) and will have max vehicle speed of 35 mph.
  • Final project incorporated the same axle hubs as the tractor though the trailer hubs were non-driven type.

Media Luna “Muckahi” Feasibility

The “Muckahi” process, conceptualized and patented by Fred Stanford, President & CEO of Torex theoretically revolutionizes steep incline methods of mineral extractions….

Read More

Prefeasibility – All Electric Open-Pit Mine

Nouveau Monde Graphite Inc. (“NMG”) is developing a world-class all electric open-pit operation located in the vicinity of Saint-Michel-des-Saints in the region of Lanaudière, Québec….

Read More

Battery Electric Motor Grader Retrofit

GOLDCORP has stated that their Borden Lake mine will be the first all Electric mine in Canada. Taking on this challenge meant acquiring many different pieces of machinery.

Read More

OPG Waste Haulage Fleet Management

Ontario Power Generation contracted MEDATECH to make major repairs to a recently commissioned nuclear waste transporter….

Read More

Hours: Mon - Fri: 9 Am - 5 PM

Saturday and Sunday - CLOSED

Phone: +1 (705) 443-8440

Collingwood ON., Canada

Ocala FL., USA