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JCB 3CX Backhoe Loader Boasts Specially Designed Off-Road Engine

Wed August 09, 2006 - National Edition
CEG



JCB’s new 3CX backhoe loaders are designed for hard work, increased productivity and greater comfort.

JCB Cab and Canopy

Operator comfort is achieved with an optional heated air suspension seat with air lumbar support, coupled with an air conditioning system, built-in cooler and cell phone holder with power supply.

All-around visibility is a key feature of the cab. This has been achieved by an increased glass area, strategic positioning of the front windshield wiper, a wide rear opening window, and a low floor at the rear for visibility down the trench.

JCB Precision Controls

Controlling the excavator function on the JCB 3CX backhoe loader becomes comfortable with the optional, fully adjustable, seat-mounted Precision Controls System, which allows operators to use a backhoe loader from any non-rear-facing position.

The JCB Precision Controls System is a hydraulic over hydraulic servo-control system that is mounted in the armrest of the backhoe loader. A choice of two transmission systems on the 3CX not only gives productivity, but also reduces operator fatigue.

JCB444 Diesel Engine

JCB has made a change from the traditional diesel engines it has used in the past. JCB designed and developed its own 4.4 L engine specifically for off-highway use.

The 444 engine is a mid-range diesel, based on a 1.1 L per cylinder design concept (bore and stroke 4.06 in. by 5.2 in. (10.3 cm by 13.2 cm)), with a four cylinder in-line layout and four valves per cylinder, hence ’444’.

The performance range includes: 74 and 84 hp naturally aspirated up to 100 hp turbocharged and 125 hp charge-cooled turbocharged.

Peak torque at 1300 rpm is: 236, 313 and 387 lbf (320, 425 and 525 Nm).

From the outset of the design, the targets were:

• Strong construction of the engine

• High torque at low engine speeds

• Reduced noise levels

• Future-proofed for the next steps in emissions legislation

In addition to the proportions of the crankshaft, the design concept features a stiff cylinder block structure with a substantial cast iron bedplate closing the bottom of the engine.

The structural stiffness and consequent reduction in radiated noise has contributed to the engine’s low overall noise level of 89 dBA with an idle speed noise level of only 78 dBA.

Other noise reduction features are the gear-train positioned at the back of the engine and a sound-deadened steel sump.

The four-valve per cylinder design and centrally positioned fuel injector ensure combustion efficiency. Fuelling uses a rotary mechanical fuel injection pump, although the engine was developed to ensure it can be easily converted to common-rail in order to meet Tier III emissions legislation. Both water pump and the oil cooler are integrated into the engine design.

Low Maintenance and Operating Costs

Service intervals on 3CX backhoe loaders are maintained at 500 hours for lower owning and operating costs. Fuel capacity is 43 gal. for a full day and-a-half operating capability.