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JCB launches biggest X Series crawler excavator with 370X

Appeared in Marine Construction Magazine Issue V, 2025

Reading Time: 2 Minutes

JCB expands its popular X Series range of tracked excavators with the unveiling of the biggest and most powerful model yet—the new 370X.

The heavy-duty excavator will bring greater productivity, durability and reliability to the 35-40-ton sector.

Key features for the 370X include:

  • A machine designed from the ground up with proven X-Series DNA built in
  • Ability to move 18 tons more material per gallon of fuel than competitive models
  • 322 hp Cummins diesel engine
  • New JCB UX user interface, with 10” color touchscreen display and controls
  • Increased hydraulic pressures that boost performance in hard digging
  • Extended service intervals for improved total cost of ownership (TCO)
  • Upgraded undercarriage and heavy counterweight deliver maximum stability

The JCB 370X is powered by the latest Cummins L9 diesel engine, which is certified as EPA Tier 4 Final compliant. This 8.9-liter, 6-cylinder engine boasts 322 hp available at just 1,700 rpm.

The engine delivers this maximum power within a reduced operating rev range to increase fuel economy and reduce overall noise levels.

The latest generation Kawasaki tandem hydraulic pump operates with an increased 5,076 psi pressure, rising to 5,511 psi during power boost cycles. Operational efficiency gets a big boost from the latest generation valve block and a hydraulically operated cooling fan with reversing function.

A heavier counterweight contributes to added stability, while larger structures cope with the additional forces. Increased service pipework diameters and raised hydraulic pressures result in more power at the dig end, which has been redesigned with cast boom foot and hydraulic ram pivot points for additional strength and longevity.

The 370X is supplied with a 21-foot (6.45 m) monoboom, with a choice of 8.6-foot (2.63 m), 10.6-foot (3.23 m) and 13.2-foot (4.03 m) arms. Optional heavy-duty arms have additional crush bars and reinforcement to cope with strenuous applications. Bucket-pin diameter has been increased, and the machine can be fitted with a new JCB dual-pin coupler to pick up 3.53-inch (90 mm) or 3.93-inch (100 mm) attachments. There are also new 2.75-cubic- yard XHD and 3.2-cubic- yard XHD buckets available, plus JCB will offer a new HM330T hydraulic breaker specifically for the 370X.

The 370X is available with a range of options. These include auxiliary hydraulic circuits with up to 15 attachment settings and a premium heated and cooled operator’s seat. LED lights are now standard, with options available to increase up to 14 LED work lights. The machine can also be offered with a bird’s eye 360-degree camera system, integrated within the 10-inch display, can also be offered, along with high-visibility, wraparound handrails.

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