Engine Specifications:
The ZAXIS 50U-3 is powered by a Yanmar 4TNV88 engine, certified to EPA interim Tier-4 emissions standards. It has a displacement of 134 cu. in. (2.19 L) and delivers a net power of 38.1 hp (28.4 kW) at 2,400 rpm.

Powertrain:
The machine features independently driven tracks powered by hydrostatic axial-piston motors connected to a two-stage planetary gear-reduction box. It offers a maximum travel speed of 2.7 mph (4.2 km/h) and a swing speed of 9 rpm.

Hydraulics:
The hydraulic system includes a closed center load sensing with one variable-displacement pump and one fixed-gear pump, providing a pump flow of 33 gpm (124.9 L/m) and an auxiliary flow of 22.5 gpm (85.2 L/m).

Electrical System:
The alternator is rated at 55 amps, and the machine is equipped with two halogen work lights.

Undercarriage:
The undercarriage includes two-speed axial-piston propel motors and 16-inch rubber tracks. Ground pressure varies from 4.06 psi (28 kPa) to 4.49 psi (30.9 kPa) depending on configuration.

Upperstructure:
Features an independent swing boom with a left swing of 80 degrees and a right swing of 60 degrees. The standard counterweight is 1,455 lb. (660 kg), with an additional 485 lb. (220 kg) available.

Serviceability:
Refill capacities include an 18.5-gallon (70 L) fuel tank, 6.9 qt. (6.5 L) cooling system, 9.1 qt. (8.6 L) engine oil with filter, and a 13.2-gallon (50 L) hydraulic tank.

Operating Weights:
The operating weight ranges from 10,811 lb. (4904 kg) to 11,712 lb. (5313 kg) depending on arm and counterweight configurations.

Operating Dimensions:
Maximum digging height ranges from 18 ft. 11 in. (5.76 m) to 19 ft. 9 in. (6.01 m), and maximum digging depth ranges from 11 ft. 8 in. (3.55 m) to 12 ft. 8 in. (3.86 m).

Lift Capacities:
At ground level with a 10-ft. (3.05 m) radius, lift capacities over the front range from 5,183 lb. (2353 kg) to 5,258 lb. (2387 kg), and over the side from 2,261 lb. (1026 kg) to 2,670 lb. (1212 kg) depending on counterweight.

Equipment and Options:
Standard equipment includes a certified engine, hydraulic system with auxiliary functions, and a zero-tail-swing configuration. Optional equipment includes steel tracks, long arm, and various attachments like augers and hammers.

Customer Support:
Hitachi offers a Customer Personal Service (CPS) program, including fluid analysis, preventive maintenance agreements, and extended warranty coverage to manage costs and reduce downtime.