Lockup modulation valve for loaders

The Sandvik Toro® LH517i and LH621i loaders have been upgraded with a new converter lockup modulation valve. This improved valve reduces the time required for lockup engagement, allowing the torque converter to reach its most efficient operating state more quickly. As a result, the loaders benefit from smoother power delivery, enhanced tramming performance, and improved responsiveness in demanding underground conditions.

In addition to performance gains, the faster and more controlled lockup engagement contributes directly to better fuel efficiency. By reducing converter slip and optimizing power transfer, operators can achieve lower fuel consumption per tonne moved, supporting both cost savings and sustainability targets.

From a maintenance and reliability perspective, the optimized modulation also helps reduce heat generation and mechanical stress, potentially extending component life and contributing to reduced downtime.

This change is fully compatible with existing systems and has no impact on the machine’s control system (VCM) or any other related functions. Customers can therefore benefit from the performance improvements without requiring software updates, operator retraining, or modifications to existing workflows.

• Faster converter lockup engagement
• More efficient power transfer and reduced converter slip
• Smoother, optimized modulation with less heat and stress

• Improved tramming performance and productivity
• Lower fuel consumption and operating costs
• Increased reliability and reduced component wear