JS260, JS330, and JS360 crawler excavators are the first to move to Tier 4-Interim Isuzu engines. Revised electronic control system and advanced hydraulic technology that ensures the machine will always start in ECO mode, give the excavators a fuel savings of up to 11 percent over the predecessor machines. JCB has redesigned the machines with new engine compartments for increased cooling capacity. Two cab layouts are available: integral ROPS structure or bolt-on FOPS protection. Front upper corner of the cab has been moved forward to allow flat glass to be used in the front windshield.