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.
In 2005, Ontario Power Generation contracted MEDATECH to make major repairs to a recently commissioned nuclear waste transporter. The transporter’s hydraulic steering and braking system as well as the steering linkage had failed with minimal hours of operation. MEDATECH was commissioned by OPG to redesign and rebuild the steering and braking system.Read More