Cat 336D L and 336E H specifications

Cat 336D L and 336E H: Operating Specifications

336D L and 336E H: owner reports

Related account: “Cracked heads on the old 336 V8, and hydraulics and fuel on the 336 excavators”: 329D L to 336EL.

History and service record of 336D L and 336E H

• The first hydraulic hybrid excavator. Caterpillar introduced the 336E H as the industry's first hydraulic hybrid excavator, built around a fuel-saving hydraulic hybrid system that captures and reuses energy instead of losing it as heat. Caterpillar unveils first hybrid excavator, Foley Inc..
• Payback estimate. Caterpillar estimated that, at the fuel prices of the time and in a production application, a customer could see a return on the extra cost of a hybrid excavator in as little as one year, with 18 months typical. Cat 336E H hydraulic hybrid excavator designed for fuel efficiency, Construction & Demolition Recycling.
• Fuel savings claimed. Caterpillar reported that the 336E H demonstrated 25 percent and in some work even 50 percent better fuel efficiency than its standard non-hybrid models. New Caterpillar hydraulic excavator showing 25% and 50% fuel efficiency improvements, OEM Off-Highway.
• Shipping details. Construction Equipment reported that Caterpillar released further details on the 308-horsepower 336E H Hybrid some months after announcing it, when the machine began shipping from the factory to Cat dealers. Caterpillar 336E H Hybrid excavator, Construction Equipment.
• The hybrid stores swing braking energy. Power & Motion reported in 2013 that the 336E H recovers the braking energy of the upper structure at the end of each swing into hydraulic accumulators, then releases it to accelerate the next swing, so the engine has less work to do. Cat makes a big impact with its hybrid excavator, Power & Motion.
• What the hybrid option costs. The same article puts the hybrid option at about 9 percent more than a conventional 336E and argues the hydraulic system avoids the generators, motors and cabling that make an electric hybrid drive cost more. Cat makes a big impact with its hybrid excavator, Power & Motion.
• Why Caterpillar chose hydraulic over electric. Caterpillar's own FAQ on the 336E H defines a hybrid as any machine that collects, stores and releases energy to do work, and says its hydraulic approach on large excavators is easier to maintain, cheaper and more efficient than electric. 336E H Hydraulic Hybrid FAQs, Caterpillar.

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