771D Quarry Truck

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StructuresThe backbone of the Cat Quarry Truck.Box-Section Design. The 771Dframe uses a box section design,incorporating 17 castings in highstress areas with deep penetratingand continuous wrap-aroundwelding. Mild steel, which providesflexibility, durability and resistanceto impact loads even in cold climatesis used throughout.Castings. Castings have large radiiwith internal reinforcing ribs todissipate stress. Castings move weldsto lower stress areas and provide twoto three times the strength ofequivalent sized fabricatedstructures.Frame Features.■ Integral front bumper.■ Front box beams for suspensioncylinder and ROPS support.■ Box-section rear crossmember forbody and ROPS support withattachment points for maintenanceplatform and rear engine hoodhinge support.■ Castings are used to provideadditional strength in critical stressareas.■ Mild steel plates (290 MPaminimum yield strength) andcastings (241 MPa minimum yieldstrength) provide flexibility,durability and easy fieldmaintenance.Frame Serviceability. The box-section frameallows simple access to power traincomponents. This open design reduces overallremoval and installation time, lowering repaircosts. Transmission access is excellent underthe raised and pinned body. Repairs can bemade without preheating in ambienttemperatures 16°C using readily availablewelding supplies.Rollover Protection Structure (ROPS).The ROPS attaches securely to four castingswelded into the frame.Suspension System. Designed to dissipatehaul road and loading impacts for extendedframe life. Four, independent, self-contained,oil pneumatic, variable-rebound, suspensioncylinders absorb shocks. Rear cylinders allowaxle oscillation and absorb the bending andtwisting stresses. Front cylinders, mountedto the frame, serve as steering kingpins,providing excellent maneuverability andreduced maintenance. Caster and camberare preset.10
Truck Body – Flat FloorCaterpillar offers excellent wear characteristics in a flat floor design.Design. 771D bodies are designed tohandle a variety of material densities.Maximum payload is reached in threeto five passes from a matched Cat loaderin 1620 kg/m 3 material and higher.Sidewall and Floor Junctions. Are joinedby five-sided beams to resist impactloading and sustained hauling stresses.Box-Section Beams. Offer increaseddurability in the floor, sidewalls, top rail,corner and cab canopy areas.Hardox 400 Steel. Wear surfaces provideexcellent wear resistance and are easilywelded without preheating procedures.Two-Stage Hoist Cylinders. Providefast dump cycle times of 7.5 secondsfor Raise and 8.3 seconds for Lower.Standard Body. Comes exhaust heatedwith options including a full-timemuffler or exhaust diverter.Body Floor Construction. Uses a12 degree single slope, offeringexcellent wear characteristics anduniform dumping into hoppers,crushers and feeders.Flat Floor Quarry Body. Offersexcellent load retention on grades upto 12 percent and on smoother haulroad conditions.11
Page 1 and 2: 771DQuarry Truck®Cat ® 3408E Engi
Page 3 and 4: Oil-Cooled, Rear Disc BrakesCaterpi
Page 5 and 6: Electronic Control Module (ECM).The
Page 7 and 8: Engine/Power Train IntegrationCombi
Page 9: Integrated Braking Control (IBC)Ele
Page 13 and 14: 771D Operator Station. Rated highly
Page 15 and 16: Ground Level Battery DisconnectSwit
Page 17 and 18: EngineBrakesBody HoistsCat 3408EGro
Page 19 and 20: DimensionsAll dimensions are approx
Page 21 and 22: 3. From the intersection of the gro
Page 23 and 24: Standard EquipmentStandard and opti

771D Quarry Truck

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