HD Hyundai Rolls out a Slew of New Machines

October 1, 2024

Matt Wolfe

HD Hyundai recently announced several new additions to its portfolio of off-highway machines. The expansion includes the HD100 dozer, the HX355A excavator, and a quartet of new models for its HX-A series of compact excavators. The HD100 is Hyundai’s first new crawler dozer model.

“The new HD100 dozer will be a great addition to the equipment fleets of earthmoving contractors, forestry, waste handlers and other customers who already enjoy the benefits of using Hyundai wheel loaders and excavators,” said Mike Ross, senior VP, HD Hyundai Construction Equipment North America.

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Hyundai said the HD100 dozer is designed to deliver more power and superior traction than comparable 10-ton dozers. Hyundai states that the machine’s undercarriage includes dual-flange rollers outside the chain of the track and single-flange rollers inside the chain of the track to ensure the track stays on the undercarriage and reduce wear.

The HD100 has a standard blade capacity of 2.9-yd 3 (2.2-m 3) and a digging depth of 1.5 feet (457 mm). It is powered by a 115 net hp (86 kW) Hyundai G2 DM03 engine that meets Tier 4 Final emissions standards paired with a hydrostatic transmission. The top speed of the HD100 is 5.6 mph (9 kph).

Standard operating weight of the HD100 is 23,589 lbs. (10,700 kg) with a track length of 108 in (2,737 cm). Standard ground contact pressure is 5.6 psi (38.6 kPa) with a standard blade. Hyundai states that an LGP (low ground pressure) option is available when ordering the dozer with a wider 10 ft 7 in (3,226 mm) blade vs. the standard 8 ft 11 in (2,718 mm) blade, along with track shoes that are 4 in (102 mm) wider than the standard shoes. The LGP package lowers overall ground pressure to 4.2 psi (29.0 kPa).

Small but mighty

Hyundai also announced the new HX355A LCR 35.5-ton compact-radius excavator. Hyundai states that the HX355A will slot between the HX350A and HX380A swing excavators in the company’s lineup. The compact-radius design of the HX355A reportedly allows it to work within confined spaces typically reserved for smaller machines.

“When contractors and other equipment users need an excavator that delivers serious power with a relatively compact footprint, the Hyundai HX355A will serve them well,” said Joe Hodges, product manager, HD Hyundai CE North America. “In the case of this compact-radius model, the cab remains inside the tracks during front or rear operations and extends a minimal 4 inches outside the tracks during side operations.”

The HX355A LCR comes equipped with a 1¾ yd 3 (1.34 m 3) bucket with 18 inches (475 mm) of ground clearance, but Hyundai also offers an 11-foot 10- inch (3.6 m) dozer blade. “With a dozer blade, operators can push and move materials more efficiently, which is especially beneficial for tasks like backfilling trenches, leveling terrain or pushing debris,” said Hodges.

The HX355A LCR has four selectable power modes and one-touch power boost for better control over machine power and efficiency.

The HX355A also comes with an integrated SPC (smart power control) system that uses sensors and software to monitor the excavator’s workload in real time. Based on this data, it automatically adjusts engine power and hydraulic flow to match the required digging force. According to Hyundai, this ensures that the excavator operates efficiently without unnecessary fuel consumption or strain on the engine.

“SPC helps keep the excavator running longer,” Hodges said, “because it keeps the machine operating within optimal power ranges, which reduces wear and tear associated with overloading or inefficient operation. This extends the life of critical components, including the engine, hydraulic system and attachments.”

Four of a kind

Rounding out Hyundai’s recent expansion news are four new HX-A compact hydraulic excavators. The HX-A series debuted at CONEXPO in 2023 and now includes a total of eight models. The latest machines are the HX17AZ, HX27AZ, HX55ACR and HX60A. The HX17AZ and HX27AZ are zero tail-swing machines for working in confined spaces. The HX55ACR is a compact-radius model.

All four new machines feature engines that are Tier 4 Final compliant. The Hyundai HX17AZ excavator is powered by a Kubota D902 diesel engine with a net power rating of 16.0 hp (11.9 kW), while the HX27AZ features a Kubota D1305 engine rated at 24.4 hp (18.2 kW). The HX55ACR uses a Yanmar 4TNV86CT engine that delivers 47.6 hp (35.5 kW), while the HX60A employs a Hyundai DM02VB engine rated 63.0 hp (47.0 kW) at 2,400 rpm.

The HX55ACR and HX60A are equipped with a standard load-sensing hydraulic system that reduces wear on hydraulic components while helping to ensure reliable performance. The HX17AZ and HX27AZ feature conventional open center hydraulic systems. Standard adjustable hydraulic flow control through the cluster on all four models lets the operator set optimum flow range for multiple attachments and switch between them, using a two-way diverter valve that directs hydraulic flow to either of two attachments simultaneously.

The HX55ACR and HX60A models offer standard blade float, which automatically forces the blade down to ensure consistent backfilling and grading. Auto engine idle, also standard on the HX55ACR and HX60A, optimizes fuel efficiency by reducing engine speed when the excavator is not in use. And standard auto-shift travel speed allows seamless transition between high and low travel speeds.

The HX17AZ has an operating weight of 4,370 lb. (1,980 kg), dig depth of 8 ft (2.44 m), and bucket breakout force of 3,668 lbf. (1,664 kgf). The HX5527AZ has an operating weight of 6,140 lb. (2,478 kg) in its canopy configuration, dig depth of 8 ft 10 in (2.7 m), and bucket breakout force of 4,613 lbf. (2,093 kgf).

The HX55ACR has an operating weight of 12,600 lb. (5,715 kg), dig depth of 12 ft 8 in (3.86 m), and bucket breakout force of 8,354 lbf (3,789 kgf). The HX60A in its standard cab configuration has an operating weight of 13,580 lb. (6,160 kg), dig depth of 12 ft 4 in (3.77 m), and bucket breakout force of 9,461 lbf (4,292 kgf).

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