Tug to trial EPA Tier 3 Cat engines

01 Jun 2012
The ‘John Quigg’ – taking part in a field study of Cat’s 3500C Tier 3 engines

The ‘John Quigg’ – taking part in a field study of Cat’s 3500C Tier 3 engines

Caterpillar Marine Power Systems says that US tug operator Harley Marine Services is participating in a field study of the Cat 3500 US EPA Tier 3 marine propulsion engines, scheduled for completion in summer 2012.

Harley’s 4,500hp tractor tug John Quigg, based in Los Angeles harbour, is fitted with two Cat 3512C HD engines. Each 3512C HD engine provides 1,678kW (2,250bhp) at 1800rpm. CMPS says that by installing the 3500 Tier 3 engines, the John Quigg reduces NOx emissions while operating in the Ports of Los Angeles and Long Beach.

Since installation of the Tier 3 engines in late 2011, the engines have operated smoothly without any disruption to service. “We are happy with the performance thus far, and the partnership with Caterpillar Marine Power Systems has been superb,” reported Doug Houghton, Harley Marine Services general manager. “Our local engineering team has adapted to the new engines and has been happy with the results.”

In January 2012, the Cat 3500C marine engines entered full production meeting EPA Tier 3 regulations. Cat says that its 3500C Tier 3 compliant offerings include propulsion, auxiliary and diesel electric propulsion (DEP) engines, none of which will require after-treatment modules to meet Tier 3 regulations, as a result of incorporating fuel and air system modifications into the design of the engines.

The 3512C Tier 3 is a V12 cylinder engine with a 170mm bore, 215mm stroke and 58.6 litre displacement. The 3516C Tier 3 is a V16 version with similar dimensions and a78.08 litre displacement. Both engine series include a broad spectrum of 1,600 and 1,800rpm options with power ratings ranging between 1,000kW and 2,525kW designed for various applications and duty cycles with enhancements to increase durability.

“Harley Marine Services is a respected industry leader in the marine transportation industry and we’re pleased they are partnering with Caterpillar to deliver more sustainable solutions to customers,” said Grant Hughes Caterpillar Marine Power Systems sales manager.

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