Caterpillar has developed a propel drive system upgrade for its CAT 7495 and 7495 HF electric rope shovels.
The upgrade reconfigures the crawler undercarriage to allow drive shaft and tumbler replacement from the outboard side, which improves access and decreases downtime by days.
Improved component design also extends the durability and increases component life to further reduce costs.
The new design is set to significantly reduce maintenance time and enhance safety by enabling access to drive components without removing the propel transmission.
Additionally, Caterpillar engineered the upgrade to be a direct replacement, with no machining of the crawler frame being required for installation.
Thrust loads are evenly distributed on large tapered roller bearings as opposed to bronze thrust plates, and the bearings are sealed and continuously purged with free grease to keep them free of contaminants.
This leads to increased durability in harsh environments and alignment with 25,000-hour planned rebuilds.
Caterpillar reports that the propel drive system upgrade has already operated successfully for “thousands of hours in field validation.”