Marine Power Systems says Harley Marine Services is participating in
a field follow study of the Cat 3500 United States EPA Tier 3 compliant marine
propulsion engines scheduled for completion in summer 2012.
Two Cat 3512C HD engines are installed on the
John Quigg, a 4,500-hp tractor tugboat positioned in Los Angeles Harbor,
California. Each 3512C HD engine provides 1,678 bkw (2,250 bhp) at 1,800 rpm.
By installing the 3500 Tier 3 engines, Cat says, the John Quigg will reduce NOx
emissions while operating in the Ports of Los Angeles and Long Beach.
Since the engines were installed in late
2011, Caterpillar says, the John Quigg’s 3512C Tier 3 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,” says
Doug Houghton, Harley Marine Services general manager, in a Caterpillar press
release. “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 United States EPA Tier 3 regulations. Cat 3500C
Tier 3 compliant offerings include propulsion, auxiliary and diesel electric
propulsion (DEP) engines. All Cat 3500C offerings will not require after
treatment modules to meet Tier 3 regulations as a result of incorporating
innovative fuel and air system modifications into the design of the engines,
The 3512C Tier 3 is a V-12 cylinder engine
with a 170 millimeter bore by 215 millimeter stroke and 58.6 liter
displacement. The 3516C Tier 3 is a V-16 cylinder with a 170 millimeter bore by
215 millimeter stroke and 78.08 liter displacement. Both engine series include
a broad spectrum of 1,600 and 1,800 rpm options with power ratings ranging
between 1,000 and 2,525 bkw designed for various applications and duty cycles
with added design enhancements to increase durability, Caterpillar says.
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,” says Grant Hughes, Caterpillar Marine
Power Systems sales manager.