The new Cat® 336E H excavator centers on an innovative, fuel-saving "hydraulic hybrid" system that captures and reuses energy. Greater fuel efficiency is the net result—as much as 50 percent greater than the 336D.

The 336E H was unveiled in October 2012, and its order board opened this February with factory shipments beginning in March. According to Ken Gray, global product manager for large hydraulic excavators for Caterpillar's Excavation Division, customers have shown tremendous enthusiasm for the 336E H since the day it was unveiled. "Customer interest has been off the charts," Gray said. "They're not only reaching out to Cat dealers to learn more about the 336E H, they are placing orders. In fact, we received our first signed orders October 17th, the day after the reveal."

Gray also said customers want to know about Caterpillar's plans for expanding hybrid technology to additional excavators. "We're getting a lot of questions about what other models will be available as a hybrid, and when," said Gray. "While I will not divulge our full hybrid strategy, I will say we will have two additional hydraulic hybrid models, the 336F H and 336D H, on the way."

Both the 336F H and 336D H models will have the same hybrid Cat Electronic Standardized Programmable (ESP) pump as the 336E H. The 336F H will feature a Cat C9.3 ACERT™ engine that meets Tier 4 Final/Stage IV emissions standards; the 336D H will feature a Cat C9 ACERT engine designed to meet the needs of customers in those countries with emissions standards different than Tier 4 Final/Stage IV.

https://www.cat.com/en_IN/news/machine-press-releases/cat-sup-174-sup-336ehhydraulichybridexcavatordeliversnocompromis.html