Engine
Field-proven Cat® 3516B HD EUI (High Displacement) turbocharged and aftercooled diesel engine delivers high power and reliability in the world's most demanding mining applications. The 3516B is a 16-cylinder, four-stroke design and uses long, effective power strokes for more complete fuel combustion and optimum efficiency.
Engine Features
- Three-ring, two-piece pistons with high strength forged steel crowns and lightweight aluminum skirts.
- Steel-backed, copper-bonded aluminum bearings.
- Uniflow cylinder head design with four alloy steel valves per cylinder.
- High carbon steel alloy crankshafts with hardened journals.
- Pressure lubrication with full-flow filtered oil and heat exchanger oil cooler.
- Direct-electric 24-volt charging system.
High Torque Rise
With 32% torque rise, the 3516B HD EUI delivers high lugging forces during digging and acceleration in high rimpull conditions for maximum efficiency and fast cycle times.
Enhanced Life
High displacement, low rpm rating and conservative horsepower ratings mean more time in the field and less time in the shop.
Electronic Control Module (ECM)
The ECM is the electronic "brains" of the power system. Computerized system senses operating conditions and power requirements and adjusts engine for most efficient operation at all times.
Electronic Unit Injection (EUI)
The electronically controlled unit injection fuel system senses operating conditions and regulates fuel delivery for optimum fuel efficiency.
High Displacement (HD)
The high displacement engine has a longer stroke, high power range and better fuel efficiency.
Advanced Diesel Engine Management
ADEM™ system controls fuel injector solenoids to start and stop fuel injection for superior performance, greater reliability, cold start protection, automatic altitude compensation and air filter restriction indication.
Separate Circuit Aftercooler
Allows aftercooler circuit to operate cooler than jacket water temperature for a denser air charge and greater combustion.
Ether Starting Aid
Ensures reliable start-up in extreme cold operating conditions.
Cat Planetary Power Shift Transmission
Features heavy duty components to handle the toughest jobs. Electronic controls allow smooth shifting for greater productivity, durability and longer component life.
Impeller Clutch Torque Converter (ICTC)
Electronically controlled impeller clutch torque converter provides maximum flexibility in regulating optimum rimpull in all conditions for smoother operation.
Inching Capability
Left brake pedal operation allows the operator to reduce rimpull to 25% then brake for more precise inching when approaching a truck or making directional changes.
Rimpull Control
Allows operator to adjust maximum rimpull from 100% down to 90, 85, 75 and 65% using a four-position dial while in first gear. Matching rimpull to job conditions provides greater traction in slippery or rough conditions for better performance and longer tire life.
Stable Design
Low mounted heavy-duty power train components ensure a stable machine.
Proven Reliability
The 994F power train has proven itself with the most reliable and durable components in the industry for the lowest operating cost-per-ton.
Torque
Torque is developed at the wheel, generating less stress and wear on the axle shafts.
Axles
The front axle is fixed, and the rear axle oscillates ±10°, which allows either rear wheel to rise or fall 677 mm (26.7 in) while all wheels remain on the ground for maximum stability, greater traction and a more comfortable ride.
Differentials
Standard conventional differentials allow one tire to spin faster than the other, keeping developed torque out of the axles.
Axle Shafts
Free-floating axle shafts can be removed independently of the wheels and planetaries for quick and easy servicing.
U-Joints
Permanently lubricated for greater durability and long service life. Only the slipjoint requires manual lubrication.
Oil-Cooled Disc Brakes
Four-wheel, fully hydraulic oil-cooled multiple disc brakes are completely sealed and adjustment free. Two brake pedals allow standard braking with right pedal plus rimpull modulation braking with left pedal.
Brake Cooling
The brake oil cooler provides additional cooling to the brake discs for greater durability.
Filtration
Screens on the brake circuit minimize the risk of contamination.
Parking/Secondary Brake
Manual, spring-applied, multiple dry-disc brake is located on the front driveline for protection from contamination. Monitoring system alerts operator if transmission is engaged while parking brake is applied, and if the pressure drops, the parking brake is automatically applied.
Engine Cooling
New Generation Modular Core Radiator (NGMR) significantly improves heat rejection through the use of copper cooling cores and improved flow characteristics.
Final Drives
The all-wheel drive design features four planet carrier gears with planetary double reduction in each wheel for superior reliability. Planetaries can be removed independently of the wheels and brakes for quick and easy servicing.
Duo-Cone® Seals
Seals out dirt and contamination to extend component life.