Cat® 3524B Electronic Unit Injection EngineGross power at 1750 rpm 2648 kW 3550 hpFlywheel power at 1750 rpm 2513 kw 3370 hp

Body capacity (SAE 2:1) Customized CustomizedGross machine operating weight 623 690 kg 1,375,000 lbPayload weight

Standard Configuration 345+ metric tons 380+ tons

®

797BMining Truck

2 797B Mining Truck specifications

TransmissionCaterpillar seven-speed, electronicallycontrolled, automatic power shifttransmission.

Maximum travel speeds (59/80R63)

tires at 1950 rpm engine speed.

Radial

km/h MPH

Forward 1 11.3 7.0

2 15.2 9.5

3 20.5 12.7

4 27.7 17.2

5 37.2 23.1

6 50.3 31.2

7 67.6 42.0

Reverse 12.9 8.0

Features

■ seven speeds forward and one reverse■ reverse and first gear are both torque

converter driven with lock-up in firstthrough seventh gears

■ each shift is individually modulatedfor maximum smoothness

■ shared oil circuit with torqueconverter

■ Controlled Throttle Shift andDirectional Shift Managementmaximize shift smoothness andminimize shift drive-line stress

■ electronic control has built-indiagnostics and fault code memory,event memory and programmablefeatures

■ single-lever shift control providesautomatic shifting in all gears up tothe one selected by the control lever

Engine3524B Series, 24 cylinder, four-stroke-cyle, diesel engine.

Ratings at 1750 rpm* kW HP

Gross power 2648 3550

Net power 2513 3370

*Power rating conditions

■ based on standard air conditions of25°C (77°F) and 99 kPa (29.32 in Hg)dry barometer

■ flywheel power meets ISO 9249, SAEJ1349 JUN95 and EEC80/1269standards

3524B High Displacement DimensionsBore 170 mm 6.7 in.Stroke 215 mm 8.5 in.Displacement 117.1 L 7143 in3

■ used 35° C API gravity fuel having anLHV of 42 780 kJ/kg (18,390 Btu/lb)when used at 30° C (86° F) [ref. a fueldensity of 838.9 g/L (7.001 lb/U.S.gal)]

■ net power advertised is the poweravailable at the flywheel when theengine is equipped with fan, aircleaner, muffler and alternator

■ no derating required up to 2591 m(8,500 ft) altitude

Features

■ full electronic control with auto derate■ high pressure unit injection■ two-piece piston with steel crowns,

thermally isolated aluminum skirts,three rings each and are cooled bydual oil spray

■ hardened crankshaft journals■ dry-type air cleaners with primary and

secondary elements and precleaner■ 24-volt electric system with two 75-

amp alternators and two 93-amp-hour,low maintenance, high-output, 12-voltbatteries

Final DrivesDouble-reduction, planetary, with full-floating axles.

Ratios

Bevel Gear (diff.) 1.265:1

Planetary (final drive) 16.67:1

Total reduction 21.09:1

Features

■ service brakes- forced oil-cooled/variable capacity- Electro-Hydraulic controls- sealed front and rear disc brakes- individually serviceable

■ parking brakes- spring-applied, hydraulically released- uses same disc brakes as service

system- toggle switch activated

■ secondary brakes- spring-applied, hydraulically released- common with service brake system

■ retarding system- hand operated lever provides

modulated engagement of service brakes for retarding

- retarding applied to all wheels (40/60split, front and rear)

- Automatic Retarder Control (ARC) (std.)

■ traction system- Traction Control System (TCS) (std.)

Braking surface 330 517 cm2

(51,243 in2)

BrakesMeets the J-ISO 3450 JAN88, ISO 3450-1996 standards up to 623 690 kg (1,375,000 lb) gross machine operating weight.

3797B Mining Truck specifications

FrameFull box-section with torque tubecrossmember.

Features

■ integral front bumper■ box-section upper cross-member for

body and ROPS support withattachment points for maintenanceplatform and rear engine hood hingesupport

■ castings are used to provide best loadpath transfer through critical stressregions

■ mild-steel plates (290 mPa/42,000 psiminimum yield strength) and castings(275 mPa/40,000 psi minimum yieldstrength) provide:

- flexibility

- durability

- good resistance to impact loads

ROPSIntegral ROPS cab is standard.

Features

■ ROPS criteria: SAE J1040 APR88,SAE J231 JAN81, ISO 3471-1994,ISO 3449-1992 Level II

■ with doors and windows closed as perwork cycle procedures specified inANSI/SAE J1166 MAY90, results inan operator sound exposure Leq(equivalent sound level of less than 76 dB(A)

■ this operator weighted soundexposure level meets OSHA andMSHA occupational noise exposurecriteria

Body HoistsTwin, two-stage hydraulic cylindersmounted outside the main frame.

Features

■ pump capacity is 1099 L/min (290gpm) @ 1750 rpm

■ relief valve setting is 237.9 bar/23 787 kPa (3450 psi)

■ body raise time (1950 engine rpm) is 25 seconds

■ body lower time:

@ 700 rpm, low idle

- power down 18.1 sec.

- float down 18.5 sec.

@ 1950 rpm, high idle

- power down 17.3 sec.

- float down 18.5 sec.

SteeringSeparate hydraulic system.

Features

■ steering hydraulic system is separatefrom the main hydraulic system toprevent cross-contamination

■ secondary steering is provided by abladder-type accumulator

■ twin, double-acting cylinders■ front suspension cylinders serve as

kingpins■ normal and secondary steering

systems meet SAE J1511 OCT90 andISO 5010-1984 standards up to grossmachine operating weight 623 690 kg(1,375,000 lb)

■ turning diameter on front wheel track

- 38.7 m (127' 0")■ machine clearance turning circle

- 42.1 m (138' 3")■ steering angle (left or right) 40°

SuspensionIndependent, self-contained, oil-pneumatic suspension cylinder on eachwheel.

Features

■ variable rebound rate reduces impactand smooths ride

■ front suspension cylinders are boltedto upper and lower frame members formaximum support

■ 4-bar link to frame and differentialhousing, minimizes lateral sway,improves machine handling andoperator comfort

■ power raise in both stages and powerdown in first stage

■ pump flow at high idle is 1225 L/min (323 gpm)

■ automatic body-lower modulation toreduce impact on frame

BodyFlat floor and Mine Specific Design(MSD) bodies are available.

Features

■ high tensile, heat-treated steel platesare utilized in the sidewalls, frontwall, and floor of all bodies

■ exhaust heating is available■ body size is determined by the

material being hauled

Note: A variety of bodies specifically designed for each unique application are available. Consult your Cat dealer to determine the most effective body for your application.

Weights(approximate)

Standard vehicle kg lb

Chassis with hoist, body mounting group and tires 214 820 473,600

Body Weight * *

* body weight varies from 38 000 to 63 000 kg

(84,000 to 140,000 lbs) — depending on how body is equipped

Gross machine operating weight 623 690 1,375,000

Weight distributions:

Empty Loaded

Front Axle 43.5% 33.3%

Rear Axle 56.5% 66.7%

Materials and specifications are subject to change without notice.

www.CAT.com© 1999, 2000, 2002 Caterpillar

Printed in U.S.A.AEHQ9028-03 (4-02)Replaces AEHQ9028-02

Service Refill Capacities

L U.S Gallons

Fuel tank 6814 1800

Cooling system 1194 315

Crankcase 417 110

Differentials 701 185

Front Wheels, each 61 16

Final Drives, each 298 62.5

Steering Tank 235 62

Steering System (includes tank) 432 114

Brakes and Hoist Tank 996 263

Brakes and Hoist System (includes tank) 1842 486

Torque Converter Sump 190 50

Torque Converter and Transmission System

(includes sump) 629 166

DimensionsAll dimensions are approximate.

TiresStandard: 59/80R63

Features

■ productive capabilites of the 797BTruck are such that, under certain jobconditions, TKPH (Tmph) limits ofthe tires could be exceeded andtherefore affect production

■ Caterpillar recommends the userevaluate all job conditions and consultthe tire manufacturer to make propertire selection

Exterior Sound RatingThis machine, in a standardconfiguration, when measured andoperated as per the prescribed modes inANSI/SAE J88 JUN86, has a 15 msound pressure level of 92dB(A) for themode that gives the highest level.