Drive
Diesel Engines
The Yale Veracitor Cummins QSB3.3L diesel turbo charged engine features legendary Cummins reliability and Tier III emission compliance. The turbocharger uses the energy of the exhaust system to compress the intake air. This increases air density, allowing a more complete combustion of the fuel, which provides higher power. The engine also features exceptionally low noise levels, forged steel crankshaft, camshaft and con rods and oil-cooled forged aluminium pistons. The cast iron block is designed to increase rigidity and resist torsional stresses.
Fuel System
The Cummins QSB3.3L turbocharged diesel engine incorporates a “High Pressure Common Rail” (HPCR) fuel system with full electronic control. The engine control module monitors critical engine operating parameters, accelerator throttle position and Vehicle System Manager messages, whilst adjusting engine fuel as necessary to achieve the required engine speed and torque output. Solenoid actuated injection nozzles, a full suite of sensors and full electronic engine control maximises engine performance while reducing engine noise and emissions. The GM LPG engine uses a mixer system. The system uses a vaporizer built into the electronic pressure regulator to convert the fuel from a liquid to a gas and then precisely deliver the proper amount to the mixer via the electronic pressure regulator. An electronic throttle body regulates the fuel/air mixture to the intake manifold. The Engine Control Unit controls the electronic throttle body, electronic pressure regulator and spark advance to provide the necessary torque. The Engine Control Unit’s inputs include manifold absolute pressure, intake air temperature, engine coolant temperature, engine oil pressure, accelerator pedal position, throttle position, engine speed, camshaft position, plus pre and post catalyst oxygen sensor signals.
LPG Engines
The Yale Veracitor VX GM Vortec™ V8 engine features a rigid cast iron block and main bearing caps. The Nodular iron crankshaft is supported on four main bearings with a cast iron camshaft. Hydraulic valve lifters are utilized to eliminate the need for manual adjustment. The GM engines also feature an electronic throttle for precise performance and control.
Controlled Power Reversal (CPR)
Tyre spin is significantly reduced by precisely regulating engine speed during full power reversal situations. Tyre wear is proportionally decreased, reducing the number of replacement tyres required.
Cooling System
The modular radiator system incorporates sections for engine coolant, transmission oil and engine intake air. A 500mm diameter blade pusher-type fan provides cooling airflow. A permanently lubricated water pump and a high capacity, cross-flow radiator ensure rapid heat dissipation. The sealed cooling system operates at a pressure of 1.0 bar and includes a coolant recovery tank for visual inspection of coolant level. The radiator is soft-mounted for durability.
Drive Axle
The drive axles are designed to withstand heavy loads and absorb shocks. The wheel hubs rotate on large tapered roller bearings. The drive shaft transmits rotational torque to the drive axle from the engine and transmission. Transmission torque is distributed through planetary gear reduction and an industrial hypoid ring gear and pinion differential assembly. The drive axle is a “self contained” assembly that is isolated from the transmission by the drive shaft and heavy-duty rubber isolators. The axle shafts utilise a “rolled fillet” root spline design for increased resistance to torsion stress. A magnetic sump plug is used to collect any metal particles that are circulating in the axle oil, preventing component wear.
Hydraulic System
The hydraulic system incorporates a gear type pump with a cast iron body for quiet efficiency. The system is protected from overloads by a main relief valve for the lift circuit and a secondary relief valve for tilt and auxiliary functions. Oil is double filtered through a 100 mesh suction line strainer and 10 micron return line filter. The hydraulic tank is integrated into the frame. An emergency lowering valve is provided to allow the load to be lowered in the event of power loss. O-ring face seal fittings are used in all high pressure hydraulic connections.