Hoping to impress ‘low-spec’ skeptics, LiuGong steps up its game with new H-Series wheel loaders

Updated Oct 21, 2016
LiuGong incorporated black accents into its H-series wheel loaders to distinguish them from the previous generation of Tier 3 models.LiuGong incorporated black accents into its H-series wheel loaders to distinguish them from the previous generation of Tier 3 models.

If “low spec” is the first thing that pops into your mind when you hear about a Chinese machine, LiuGong would like you to take a second look.

A backup camera comes standard and engages anytime the loader is put in reverse.A backup camera comes standard and engages anytime the loader is put in reverse.

With the introduction of its new Tier 4 Final wheel loaders, the Chinese equipment manufacturer is bringing North American and European customers six of its most technologically sophisticated machines yet.

Designated as the H-Series, the Z-bar configured wheel loaders range in size from 3 to 9 tons and include standard features such as:

•  Cummins or Perkins engines
•  Rexroth piston pump
•  Load-sensing, variable flow steering hydraulics
•  ZF drivetrains
•  Quick-coupler, third valve hydraulics (for the four smaller models)
•  Auto-lube
•  Ride control
•  Rear-view camera
•  High back, air ride seat from Grammer
•  Topcon Tierra telematics
•  Emergency steering
•  Hydraulically actuated, on-demand cooling fan

The larger wheel loaders run on Cummins engines. The smaller models use Perkins.The larger wheel loaders run on Cummins engines. The smaller models use Perkins.

Emissions driven

The decision to use Cummins or Perkins engines was driven by the emissions regulations on engines in this horsepower class. These powerplants are well proven in the marketplace and familiar to American contractors, which will make service and repair easier says Hugo Chang, wheel loader product manager.

All these engines use diesel oxidation catalysts (DOCs) and selective catalytic reduction (SCR) systems that require diesel exhaust fluid. The largest model, the 890, also includes a diesel particulate filter (DPF).

The 835H and 840H models receive the Perkins 1204F engine. The 848H and 856H loaders get the Cummins QSB 6.7. The 877H is powered by the Cummins QSL 9, and the 890H gets the Cummins QSG 12.

Cooling fans pull a lot of horsepower away from an engine. By using hydraulically driven, on-demand fans, LiuGong was able to conserve fuel and apply more power to the work at hand.Cooling fans pull a lot of horsepower away from an engine. By using hydraulically driven, on-demand fans, LiuGong was able to conserve fuel and apply more power to the work at hand.

Load sensing hydraulics

Perhaps the biggest change in terms of performance is the switch to closed-center, load-sensing hydraulics. “We are matching what the industry is doing,” says Chang. “This is a much more sophisticated, intelligent and modern system.”

In closed-center, load-sensing systems the hydraulics ramp up only on demand and proportional to demand. Heavy loads get high pressures and maximum flow. Lighter loads get less of both. This conserves fuel and pump life and helps the machine operate smoother. The sophisticated electronics which govern the load-sensing system also enable an on-demand cooling fan, thus further reducing fuel burn. In older, open-center hydraulic designs, the entire system is fully pressurized whether the machine is working hard or not.

Autolube systems come standard on all the H-Series and enable the operator to spend more time working and less time greasing.Autolube systems come standard on all the H-Series and enable the operator to spend more time working and less time greasing.
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Proven drivetrain

LiuGong chose to continue using the ZF mechanical drivetrain it had on the older Tier 3 loaders. A hydrostatic transmission was considered, and prototypes built, but the final decision was to stick with the ZF mechanical system.

“Because we were changing so many things on this machine, we decided the one thing we wouldn’t change was the drivetrain,” Chang says. “We knew the ZF was a proven product and when it came down to a choice between improving the hydraulics or the drivetrain, we chose the hydraulics.”

Quick-coupler ready

The third-valve hydraulics on the new loaders was designed to activate a quick-coupler system. “Even if the loader is shipped with a pin-on bucket, we will ship it with the third valve deadheaded at the end of the boom,” says Chang. “The idea is to give our customers maximum versatility so later on, if they want to convert to a quick-coupler system, the hydraulic hosing and valve are already there for them.”

Since the 7- and 9-ton loaders are used primarily for production work and rarely change buckets, they did not get the third valve hydraulics.

Sound levels inside the H-Series cabs were also reduced due to European regulations, but benefit American customers as well. The 856 size machine, for example, went from 76 decibels to 73.