The Cat 797 is the leader in its class and the 797F continues this tradition with advancements in safety, productivity, serviceability and comfort. Whether hauling copper, coal, iron ore, gold or overburden, the 797F will deliver the lowest cost-per-ton. Combine the features of the 797F with unmatched dealer support and you will see why more people choose Cat Mining Trucks for their
production needs.
ENGINE
production needs.
ENGINE
The Cat C175-20 quad turbocharged and air-to-air
aftercooled diesel engine has enhanced power management capability for maximum hauling performance in the most demanding mining applications.
Design The C175-20 is a 20 cylinder, single block, four stroke design that uses long, effective power strokes for optimum effi ciency.
EPA Compliant
Where applicable, the Cat C175-20 engine is compliant with U.S. Environmental Protection Agency emissions requirements.
Long Life
High displacement, low rpm rating and conservative power ratings mean more time on the haul roads and less time in the shop.
Cat Common Rail Fuel System
The electronically-controlled system senses operating conditions and regulates fuel delivery for optimum fuel effi ciency. This precise and fl exible fuel system gives the engine the ability to meet emission regulations without sacrifi cing performance, reliability or durability. Cooling System
The MESABI™ Radiator comes standard on the 797F.
The flexible core design offers long life, high durability and easy serviceability.
StarterThe tank on the air start system is ground level for easy serviceability.
TRANSMISSION
Mechanical Power Train
The Cat mechanical drive power train and powershift transmission provides unmatched operating effi ciency and control on steep grades, in poor underfoot conditions and on haul roads with high rolling resistance.
1 – Transmission
The Cat seven speed, planetary power shift transmission is atched with the C175-20 engine to deliver constant power over a wide range of operating speeds.
• Robust Design – Designed for the higher power of the C175-20 engine, the proven planetary power shift transmission is built tough.
• Long life – A dedicated oil tank and circuit provides cooler, cleaner oil for maximum performance and longer component life.
Electronic Clutch Pressure Control
ECPC provides maximum performance, smooth shifting,
long clutch life and a more comfortable ride.
2 – Lock-Up Torque Converter
Combines maximum rimpull and cushioned shifting of torque converter drive with the effi ciency and performance of direct drive. The lock-up torque converter engages at approximately 8 km/h (5 mph), delivering more power to the wheels.
3 – Final Drives
Cat fi nal drives work as a system with the planetary power shift transmission to deliver maximum power to the ground. Built to withstand the forces of high torque and impact loads, double reduction fi nal drives provide high torque multiplication to further reduce drive train stress.
ENGINE / POWER TRAIN INTEGRATION
ENGINE / POWER TRAIN INTEGRATION
Cat Data Link
Electronically integrates machine computer systems to optimize overall power train performance, increase reliability and component life and reduce operating costs.
Body-Up Shift Inhibitor
Prevents the transmission from shifting above the pre-programmed gear without the body fully lowered. The machine can move forward but the speed is limited to avoid excessive racking when pulling away from a dump site.
Overspeed Protection
The transmission control electronically senses engine conditions and automatically up-shifts one gear to prevent overspeeding.
Programmable Top Gear
Transmission top gear maximum can be set using the Cat Electronic Technician service tool to help the operator maintain speed limits.
Downshift Inhibitor
Prevents engine overspeeding by keeping the transmission from downshifting until engine speed reaches the downshift point.
Controlled Throttle Shifting
Regulates engine rpm during shifting to reduce power train stress and clutch wear by controlling engine speed, torque converter lock-up and transmission clutch engagement for smoother shifts and longer component life.
Reverse Speed Inhibitor
Prevents shifts into reverse when forward ground speeds are in excess of 4.8 km/h (3 mph).
BRAKING SYSTEM
Integrated Braking System
The Cat, oil-cooled braking system delivers reliable performance and control in extreme haul road conditions. The integrated system combines the service, secondary, parking brakes and retarding functions in the same system for optimum braking effi ciency that does not burn fuel while retarding.
Oil-Cooled Multiple Disc Brakes
Cat four wheel, forced oil-cooled, multiple disc brakes are continuously cooled by water-to-oil heat exchanger for exceptional, non-fading braking and retarding performance.
Brake Design
Cat, oil-cooled disc brakes are designed with large discs and plates for reliable, adjustment-free operation and performance. Brakes are completely enclosed and sealed to prevent contamination and reduce maintenance.
Long Life
An oil fi lm prevents direct contact between the discs. This design absorbs the braking forces by shearing the oil molecules and carrying heat away to extend brake life.
Parking Brake
Oil-cooled, spring-applied, hydraulically released parking brake is applied to all four wheels for superior parking capability on all grades up to 15 percent.
Hydraulic Automatic Retarder Control (ARC)
Hydraulically activated, automatic retarder control system electronically controls retarding on grade to maintain optimum engine rpm and brake system performance. ARC is now adjustable in each gear.
See You Soon!!!
MARYGAR
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