Caterpillar has upgraded the propel drive system on its 7495 and 7495 HF Electric Rope Shovels. The upgrade reconfigures the crawler undercarriage to allow drive shaft and tumbler replacement from the outboard side, improving access and reducing downtime.

The new design also reduces maintenance time and enhances safety by enabling access to drive components without removing the propel transmission. No machining of the crawler frame is required for installation. 

In addition, thrust loads are evenly distributed on large tapered roller bearings as opposed to bronze thrust plates. The bearings are sealed with fresh grease to keep them free of contaminants, increasing durability in harsh environments.