Cat 785C Off-Highway Truck Parts Manual (SEBP3021-16) (SN APX1-UP, 8BR605-UP, 2BE1450-UP, 5RT1-UP)

Out where these 785C trucks live—big pits, haul roads, dust, mud, and night shifts—this parts manual is what you reach for when something’s torn down and you’ve got pieces on the bench. It helps you trace assemblies, break them into sub-components, and match the exact part numbers so you don’t order the wrong snap ring or seal and lose another shift. Picture the transmission on stands, clutch pack out, three different snap rings in a tray that all “look right” until you check the illustration and parts breakdown and finally isolate the one that actually fits your serial number.

Applications & Use Cases

• Track serial-specific changes so you can verify whether your truck takes the early-style or updated component before you order.
• Use the exploded views to trace a system—say the rear suspension—then inspect and list every bushing, pin, and shim you’ll replace while it’s apart.
• Align your shop inventory with what fails most by checking common sub-assemblies and building small kits around them.
• Route hoses, lines, and harnesses correctly by following the diagrams instead of guessing where a clamp or bracket should sit.
• Isolate superseded part numbers, then test your dealer’s cross-reference so you don’t get stuck with obsolete stock.

FAQ

Q: Is this a PDF I can search on my laptop, or just a scanned picture?

A: It’s typically a searchable PDF, so you can jump by part number or description instead of flipping page by page.

Q: Can I print just the sections I need to take out to the truck?

A: Yes, most folks print the specific systems they’re working on, stick them in a plastic sleeve, and toss them in the service truck.

Safety Note

Always lock out, tag out, and bleed any stored energy before you start pulling components you’ve just identified in the manual.

Cat 785C Off-Highway Truck Index:

• Go to Main Menu
• GENERAL INFORMATION
• REPAIR ALTERNATIVES
• SUPPLEMENTAL COOLANT ADDITIVES
• MAINTENANCE PARTS
• INDEX
  • INDEX (French)
  • INDICE (Spanish)
  • ÍNDICE (Portuguese)
  • STICHWORTVERZEICHNIS (German)
• MACHINE ARRANGEMENT
  • CHASSIS AR
  • CHASSIS AR-EU
  • GENERAL AR
  • MACHINE AR-EU
• ENGINE ARRANGEMENT
  • ENGINE AR
  • INSTALLATION AR-ENGINE
• BASIC ENGINE
  • AIR COMPRESSOR GP
  • BASE GP-VALVE COVER
  • BELT TIGHTENER GP
  • CAMSHAFT GP
  • COVER GP-CYLINDER BLOCK
  • COVER GP-FLYWHEEL HOUSING
  • COVER GP-FRONT HOUSING
  • COVER GP-VALVE MECHANISM
  • CRANKSHAFT GP
  • CYLINDER BLOCK AS
  • CYLINDER BLOCK GP
  • CYLINDER HEAD AS
  • CYLINDER HEAD GP
  • DAMPER GP
  • DRIVE AR-FAN
  • DRIVE GP-ACCESSORY
  • DRIVE GP-AUXILIARY
  • DRIVE GP-FAN
  • FLYWHEEL GP
  • GEAR GP-FRONT
  • GEAR GP-REAR
  • GUARD GP-BELT
  • HOUSING GP-FLYWHEEL
  • HOUSING GP-FRONT
  • LIFTING GP-ENGINE
  • MOUNTING GP-ALTERNATOR
  • PAN GP-OIL
  • PISTON & ROD GP
  • SEAL GP-CRANKSHAFT
  • STEP GP-ENGINE
  • SUPPORT GP-ENGINE
  • TRUNNION GP-ENGINE
  • VALVE MECHANISM GP
• LUBRICATION SYSTEM
  • BREATHER GP
  • FILLER GP-ENGINE OIL
  • FILTER GP-ENGINE OIL
  • FUMES DISPOSAL GP
  • GAUGE GP-OIL LEVEL (DIPSTICK)
  • LINES GP-ENGINE OIL
  • LINES GP-FAN DRIVE
  • LINES GP-PRELUBRICATION
  • LINES GP-TURBOCHARGER OIL
  • METERING GP-OIL
  • OIL CHANGE GP-HIGH SPEED
  • PUMP GP-ENGINE OIL
  • PUMP GP-SCAVENGE
  • VALVE & MTG GP-FAN DRIVE
  • VALVE & MTG GP-OIL METERING
  • VALVE GP-SOLENOID
• COOLING SYSTEM
  • CONNECTION GP-WATER
  • COOLER GP-ENGINE OIL
  • CORE GP-OIL COOLER
  • COVER GP-RADIATOR CAP
  • FAN GP-SUCTION
  • HOUSING & REGULATOR GP
  • INDICATOR GP-LIQUID LEVEL
  • LINES GP-WATER
  • PUMP GP-AUXILIARY WATER
  • PUMP GP-WATER
  • RADIATOR GP
  • SHIELD GP-WATER MANIFOLD
  • SHUTTER GP-RADIATOR
  • VALVE AS
  • VALVE GP-COOLANT SAMPLING
  • VALVE GP-SOLENOID
• AIR INLET AND EXHAUST SYSTEM
  • AFTERCOOLER GP-TREATED WATER
  • AIR CLEANER GP
  • EXHAUST AR-BODY
  • LINES GP-AIR
  • MANIFOLD GP-EXHAUST
  • MUFFLER GP
  • PIPE GP-EXHAUST
  • SHIELD GP-MANIFOLD
  • TURBOCHARGER GP
• FUEL SYSTEM
  • ADAPTER GP-FAST FILL FUEL
  • CONTROL GP-ACCELERATOR
  • FILTER GP-FUEL
  • FILTER GP-PRIMARY FUEL
  • FILTER GP-WATER SEP & FUEL
  • HEATER GP-FUEL
  • INJECTOR GP-FUEL
  • LINES GP-FUEL
  • LINES GP-FUEL INJECTION
  • PUMP GP-FUEL INJECTION
  • PUMP GP-FUEL PRIMING
  • PUMP GP-FUEL TRANSFER
  • TANK AS-FUEL
  • TANK GP-FUEL
• ELECTRICAL AND STARTING SYSTEM
  • ALARM GP
  • ALTERNATOR GP-CHARGING
  • APPLICATION GP-MONITOR
  • BUFFER GP-SENSOR
  • CONTROL & MTG GP-ELECTRONIC
  • CONTROL & MTG GP-ENGINE ELEK
  • CONTROL GP-AIR STARTING
  • CONTROL GP-ELECTRONIC
  • CONTROL GP-ENG RATINGS ELEK
  • CONTROL GP-ENGINE ELECTRONIC
  • CONTROL GP-FAN
  • CONTROL GP-UNPROGRAMMED
  • ELECTRONICS GP-ENGINE RATINGS
  • ELECTRONICS GP-MACHINE
  • ELECTRONICS GP-MONITOR
  • ELECTRONICS GP-POWER TRAIN
  • HEATER GP-JACKET WATER
  • LAMP GP-DOME
  • LAMP GP-FLOOD
  • LAMP GP-HEAD
  • LAMP GP-PAYLOAD SIGNAL
  • LAMP GP-REAR
  • LAMP GP-SIGNAL
  • LUBRICATOR GP-AIR MOTOR
  • MOTOR GP-PRELUBRICATION
  • PANEL GP-CIRCUIT BREAKER
  • SENSOR & MTG GP-PRESSURE
  • SENSOR GP-COOLANT LEVEL
  • SENSOR GP-FUEL LEVEL
  • SENSOR GP-POSITION
  • SENSOR GP-PRESSURE
  • SENSOR GP-SPEED
  • SENSOR GP-TEMPERATURE
  • SOFTWARE GP-MACHINE
  • SOFTWARE GP-MONITOR
  • SOFTWARE GP-POWER TRAIN
  • STARTING AID GP-ETHER
  • STARTING AR-AIR
  • SWITCH GP-BYPASS
  • SWITCH GP-DISCONNECT
  • SWITCH GP-FLOW
  • SWITCH GP-LIQUID LEVEL
  • SWITCH GP-MAGNETIC
  • SWITCH GP-START
  • VALVE GP-SOLENOID
  • WIRING & LIGHTING GP-CHASSIS
  • WIRING GP-CAB
  • WIRING GP-ENGINE
• POWER TRAIN
  • ACTUATOR GP-ROTARY
  • CASE & PARTS GP-PLANETARY
  • CONTROL GP-TRACTION
  • CONTROL GP-TRANSMISSION
  • CONTROL GP-TRANSMISSION HYD
  • COOLER GP-REAR AXLE OIL
  • COVER GP-SHIPPING
  • COVER GP-TRANSMISSION TANK CAP
  • DIFFERENTIAL & BEVEL GEAR GP
  • DIFFERENTIAL GP
  • DRIVE GP-PUMP
  • FILTER & LINES GP-TORQUE CONV
  • FILTER GP-OIL
  • FINAL DRIVE GP
  • GEAR GP-TRANSFER
  • HOUSING AS-REAR AXLE
  • HOUSING GP-REAR AXLE
  • LINES GP-POWER TRAIN FILTER
  • LINES GP-TRANSMISSION OIL
  • PLANETARY GP-TRANSMISSION
  • POWER TRAIN AR
  • PUMP & LINES GP-REAR AXLE LUBE
  • PUMP GP-GEAR
  • RIM GP-DEMOUNTABLE
  • RIM GP-SINGLE
  • SCREEN GP-MAGNETIC
  • SHAFT GP-DRIVE
  • SLIP JOINT GP
  • TORQUE CONVERTER GP
  • TRANSMISSION AR
  • VALVE GP-COOLER BYPASS
  • VALVE GP-FLOW CONTROL & RELIEF
  • VALVE GP-LOCKUP CLUTCH & SYNC
  • VALVE GP-LUBE RELIEF
  • VALVE GP-PRESSURE CONTROL
  • VALVE GP-RELIEF
  • VALVE GP-SELECTOR & PRESS CONT
  • VALVE GP-SOLENOID
  • VALVE GP-TRACTION CONTROL
  • VALVE GP-TRANSMISSION CONTROL
  • WHEEL GP-REAR
• FRAME AND BODY
  • BODY & CANOPY AS
  • CABLE GP-TRUCK BODY RETAINING
  • CATWALK GP
  • COWLING GP
  • EXTENSION AS-TAIL
  • FENDER GP
  • FRAME AS
  • FRAME GP
  • GUARD GP-DRIVE SHAFT
  • GUARD GP-PLATFORM
  • HOOD GP-TRUCK
  • LADDER GP
  • LINER GP-BODY-HEAVY WEIGHT
  • LINER GP-EXTENSION
  • LUBRICATION GP-AUTOMATIC
  • MIRROR GP-REAR VIEW
  • MOUNTING AR-DUAL SLOPE BODY
  • MOUNTING AR-FLAT FLOOR BODY
  • MOUNTING GP-BODY
  • PLATFORM GP-RH
  • PUMP GP-LUBRICATION
  • SIDEBOARD AS-BODY
  • SIDEWALL CAP AS-BODY
  • SUSPENSION GP-FRONT
  • SUSPENSION GP-REAR
  • TREAD GP-NONSKID
  • VALVE GP-LUBE DISTRIBUTION
• BRAKING SYSTEM
  • AIR DRYER GP
  • BRAKE GP-SERVICE & PARKING
  • CONTROL GP-PARKING BRAKE
  • CONTROL GP-RETARDER
  • CONTROL GP-SERVICE BRAKE
  • CYLINDER GP-AIR
  • CYLINDER GP-AIR/HYDRAULIC
  • LINES GP-SERVICE BRAKE
  • PUMP GP-ELECTRIC DRIVE
  • SLACK ADJUSTER GP
  • TANK GP-AIR
  • TANK GP-BRAKE
  • VALVE & MTG GP-BRAKE
  • VALVE AS-CHECK
  • VALVE GP-AIR CONTROL
  • VALVE GP-BRAKE
  • VALVE GP-CHECK
  • VALVE GP-RELIEF
  • VALVE GP-SOLENOID
• STEERING SYSTEM
  • ACCUMULATOR GP-STEERING
  • CONVERSION GP-STEERING TANK
  • COVER GP-HYDRAULIC TANK CAP
  • CYLINDER & MTG GP-STEERING
  • CYLINDER GP-STEERING
  • LINES GP-STEERING
  • LINK GP-STEERING
  • PUMP & MTG GP-STEERING
  • PUMP GP-METERING
  • PUMP GP-PISTON
  • ROTATING GP-PUMP
  • STEERING COLUMN GP
  • STEERING GEAR GP
  • TANK & FILTER GP-STEERING
  • VALVE GP-BREAKER RELIEF
  • VALVE GP-CHECK
  • VALVE GP-PRESS & FLOW CMPNSTR
  • VALVE GP-PRESSURE COMPENSATOR
  • VALVE GP-RELIEF
  • VALVE GP-SOLENOID
  • VALVE GP-SOLENOID & RELIEF
  • WHEEL GP-FRONT
• HYDRAULIC SYSTEM
  • ACTUATOR GP-PILOT CONTROL
  • CONTROL GP-HOIST
  • CONTROL GP-HOIST ELECTRONIC
  • COVER GP-HYDRAULIC TANK CAP
  • CYLINDER & MTG GP-HOIST
  • CYLINDER GP-HOIST
  • HYDRAULIC AR
  • LINES GP-HOIST
  • LINES GP-HYDRAULIC OIL COOLER
  • MANIFOLD GP
  • MOUNTING GP-HYDRAULIC TANK
  • PUMP GP-GEAR
  • SCREEN GP-HYDRAULIC
  • SHAFT GP-PUMP DRIVE
  • TANK GP-HYDRAULIC & TMSN
  • UNIVERSAL JOINT GP-PUMP DRIVE
  • VALVE GP-CONTROL
  • VALVE GP-DIVERTER
  • VALVE GP-RELIEF
• OPERATOR STATION
  • AIR CONDITIONER GP
  • ARMREST GP
  • CAB AR-ROPS
  • CAB GP-ROPS
  • CLEANOUT GP-CAB
  • COMPRESSOR GP-REFRIGERANT
  • CONDENSER & MTG GP-REFRIGERANT
  • DASH GP
  • DOOR GP-RH
  • DOOR GP-LH
  • HORN GP-AIR
  • INSTALLATION GP-RADIO
  • LINES GP-AIR CONDITIONER
  • LINES GP-HEATER
  • MODULE GP-MESSAGE CENTER
  • MOUNTING GP-CAB
  • ODOMETER GP
  • PAN GP-BACKREST
  • PANEL GP-INSTRUMENT
  • PANEL GP-SOUND SUPPRESSION
  • PLATE GP-SLIDE
  • RECLINER GP-SEAT
  • SEAT BELT GP
  • SEAT GP
  • SEAT GP-ADJUSTABLE
  • SEAT GP-COMPANION
  • SEAT GP-SUSPENSION
  • SUSPENSION GP-SEAT
  • TANK GP-WINDOW WASHER
  • VISOR GP-CAB
  • WASHER GP-WINDOW
  • WINDOW GP
  • WIPER GP-WINDOW
• SERVICE EQUIPMENT AND SUPPLIES
  • CHOCK GP-WHEEL
  • FILM GP
  • FILM GP-CAB
  • PLATE & FILM GP
  • PLATE-WARNING
• PART NUMBER INDEX

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