THE exceptional economy, ergonomics and performance of the new Linde 39X may be interpreted as a total redefining of lift trucks powered by internal combustion engines.
The 2000 to 2500kg diesel and LP gas models were five years in the making with the end result producing a new engineering concept, new drive system and engine, and a unique mast design.
The overall weight of the 39X is 20% lighter than its predecessor. The fuel savings, achievable from the 39X, are quoted by Linde as 30%.
The key to the weight saving is the ability to use the smallest engine possible. By refining every aspect of the forklift, Linde has been able to achieve optimum efficiency with regards to power requirements without sacrificing load capacities.
Linde’s choice of engine for the 39X was based on proven, high volume models of confirmed fuel efficiency. Direct-injection diesels and LPG engines are available, both manufactured by VW. All are environmentally friendly power units with clean exhausts that lie well within the latest emission control regulations.
The integrity of the low emission status of the 39X is maintained through its ability to always stay tuned. The electronic engine management systems continuously monitor the state of the engine and automatically adjust parameters to ensure optimum combustion process within the engine. It is not dependent on regular maintenance intervals to ensure low emissions.
Commenting on the technology breakthroughs evident on the 39X, Linde’s Andrew Satterley explained that the driver has been the focus of the new design.
“The progress in ergonomic design of the 39X is exciting for forklift drivers. The compact nature of the engine pays off in tangible comfort for the operator. The cabin offers clear space for entry and exit without going through any contortions and the entry step has been dropped significantly to achieve an access height of just 460mm,” Mr Satterley said.
“The noise level is 50% lower than its predecessor due to a reduction of 5dB(A). This actually makes this internal combustion forklift quieter than some electric lift trucks on the market.
“The nucleus of the truck’s ergonomic focus is the Linde Load Control (LLC) system of electronic mast function actuation. LLC simplifies load handling to a vast degree and sets a new standard for improving productivity through ergonomic factors.”
The two control levers for mast, fork and load movement are integrated in a wide armrest that is adjustable vertically and horizontally resulting in the levers sitting literally at the operator’s fingertips. The electronic actuation of the hydraulics means that the effort required with either control lever is 85% less than operator effort needed with mechanical levers. The use of proportional hydraulic valves results in very smooth motions that minimise the risk of load damage.
A new control system – Linde Truck Control (LTC) provides the operator with superb responsiveness and precision in driving and lifting. It also keeps the engine speed at the lowest rpm necessary for each task, assisting fuel efficiency, quiet running and, most importantly, eliminates operator involvement in managing engine speed.
Another major advancement is the newest generation of Linde’s hydrostatic transmission in the form of direct drive of the front wheels by the hydraulic motors. No gearing is installed between the motors and the wheels resulting in better efficiency, reducing fuel usage and substantially contributing to noise reduction.
Linde’s top mounting of the tilt jacks also offers a number of advantages. To begin with, structural stability is significantly increased, resulting in much less flexing of the mast, thus enabling the use of slim-profile sections. The slimmer construction, combined with the use of internal hydraulic hose reels, offers greatly improved upward and forward visibility for the operator.
In addition to the dramatic decrease in fuel consumption, running costs are minimised through the elimination of expensive and maintenance-dependent parts such as, no mechanical clutch, gearbox or conventional brake. Depending on the application, Linde is recommending maintenance intervals of up to 1,000 hrs which, when compared to standard intervals of 250 hours, suggests a significant saving on maintenance.
Linde manufactures an extensive range of forklifts, with capacities from 1.2 to 52 tonnes. The company has a national factory-owned customer support network and operates one of the largest rental fleets in the country.