Complete workshop repair service manual with electrical wiring diagrams for Caterpillar D250E & D300E Articulated Trucks. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This Caterpillar D250E & D300E Articulated Trucks service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

SENR2947 - Systems Operation (Starting and Charging Systems).pdf
SENR8632 - Schematics (D250E and D300E Articulated Truck Electrical System).pdf
SENR8636 - Specifications (D250E and D300E Articulated Trucks Power Train).pdf
SENR8641 - Specifications (D250E & D300E Articulated Trucks Brake System).pdf
SENR8643 - Specifications (D250E and D300E Articulated Trucks Steering, Suspension, and Body Hoist Hydraulic Systems).pdf
SENR8647 - Schematics (D250E and D300E Articulated Truck Hydraulic System).pdf
SENR8653 - Disassembly and Assembly (D250E & D300E Articulated Trucks Power Train).pdf
SENR8654 - Disassembly and Assembly (D250E & D300E Articulated Trucks Machine Systems).pdf
SENR8655 - Disassembly and Assembly (Supplement for D250E & D300E Articulated Trucks - 3306 Engine).pdf
SENR8637 - Systems Operation (D250E & D300E Articulated Trucks Power Train).pdf
SENR8640 - Systems Operation (D250E & D300E Articulated Trucks Steering, Suspension & Body).pdf
SENR8640 - Testing and Adjusting (D250E & D300E Articulated Trucks Steering, Suspension & Body).pdf
SENR8642 - Systems Operation (D250E & D300E Articulated Trucks Brake System).pdf
SENR8642 - Testing and Adjusting (D250E & D300E Articulated Trucks Brake System).pdf
SENR8656 - Systems Operation (Electronic Programmable Transmission Control (EPTC II) for A).pdf
SENR8656 - Testing and Adjusting (Electronic Programmable Transmission Control (EPTC II) for A).pdf
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 SENR2947 - Systems Operation (Starting and Charging Systems)
    Alternator Breaker Test Description
    Alternator Test Description
    Analyzer Test Description
    Basic Operation
    Batteries Test Description
    Coolant Switch Test Description
    General Information
    Key Breaker Test Description
    Key Start Switch Test Description
    Main Relay and_or Breaker Test Description
    Reference Information
    Specifications
    Start Aid Switch_Solenoid Test Description
    Starter Ground Circuit Test Description
    Starter Solenoid Power Circuit (Starter One) Test Description
    Starter Solenoid Power Circuit (Starter Two) Test Description
    Starter Solenoid (Starter One) Test Description
    Starter Solenoid (Starter Two) Test Description
    Start Relay (Starter One) Test Description
    Start Relay (Starter Two) Test Description
    Test Considerations
    Test Setup A, Hookup
    Test Step B, Crank
    Test Step C, Start Aid
    Test Step D, High Idle
    Troubleshooting
 SENR2947 - Systems Operation (Starting and Charging Systems)
 SENR8632 - Schematics (D250E and D300E Articulated Truck Electrical System)
    Collage
    Main
 SENR8632 - Schematics (D250E and D300E Articulated Truck Electrical System)
 SENR8636 - Specifications (D250E and D300E Articulated Trucks Power Train)
    Accumulator (Retarder)
    Center Axle
    Differential and Bevel Gear
    Final Drive and Wheel
    Front Axle
    Front Drive Shaft
    Hitch Drive Shaft
    Lockup Clutch and Solenoid Valve
    Main Drive Shaft
    Oil Filter (Transmission)
    Output Transfer Gear Group
    Priority Valve
    Rear Axle
    Rear Drive Shaft
    Relief Valve (Torque Converter Outlet)
    Retarder Hydraulic Control Valve
    Retarder Solenoid Control Valve
    Selector and Pressure Control Valve
    Solenoid and Relief Valve (Output Transfer Gears)
    Solenoid Valve (Differential Lock)
    Solenoid Valve (Lockup Clutch)
    Solenoid Valve (Retarder)
    Solenoid Valve (Upshift and Downshift)
    Speed Sensor (Transmission)
    Torque Converter and Housing
    Torque Converter
    Transfer Gear Group
    Transmission Hydraulic Control
    Transmission Mounting
    Transmission Planetary
    Transmission Pump
 SENR8636 - Specifications (D250E and D300E Articulated Trucks Power Train)
 SENR8637 - Systems Operation (D250E & D300E Articulated Trucks Power Train)
 SENR8640 - Systems Operation (D250E & D300E Articulated Trucks Steering, Suspension & Body)
 SENR8640 - Testing and Adjusting (D250E & D300E Articulated Trucks Steering, Suspension & Body)
 SENR8641 - Specifications (D250E & D300E Articulated Trucks Brake System)
    Accumulator
    Accumulators (7U7745)
    Parking Brake (Part Of 118-2282 And 132-7346 Transfer Drive Groups)
    Parking Brake Valve (120-4886)
    Pressure Switch (128-3166)
    Pressure Switch 7U9036
    Pressure Switch 7U9037
    Service Brake Group (8X7186)
    Service Brake Valve (2U7332)
 SENR8641 - Specifications (D250E & D300E Articulated Trucks Brake System)
 SENR8642 - Systems Operation (D250E & D300E Articulated Trucks Brake System)
 SENR8642 - Testing and Adjusting (D250E & D300E Articulated Trucks Brake System)
 SENR8643 - Specifications (D250E and D300E Articulated Trucks Steering, Suspension, and Body Hoist Hydraulic Systems)
    Counterbalance Valve (Tailgate)
    Hoist Control Valve
    Hoist Cylinder
    Hydraulic Tank
    Metering Pump (Steering)
    Piston Pump (Secondary Steering)
    Piston Pump (Steering, Hoist, and Brake)
    Pressure and Flow Compensator Valve (Secondary Steering)
    Pressure and Flow Compensator Valve (Steering, Hoist, and Brake)
    Pressure Switch (Steering, Hoist, and Brake Oil and Secondary Steering Oil)
    Secondary Steering Valve
    Selector Valve (Steering)
    Steering Control Valve
    Steering Cylinder
    Suspension Accumulator
    Suspension Accumulator
    Suspension Cylinder (Front)
    Tailgate Cylinder
 SENR8643 - Specifications (D250E and D300E Articulated Trucks Steering, Suspension, and Body Hoist Hydraulic Systems)
 SENR8647 - Schematics (D250E and D300E Articulated Truck Hydraulic System)
    Collage
    Main
 SENR8647 - Schematics (D250E and D300E Articulated Truck Hydraulic System)
 SENR8653 - Disassembly and Assembly (D250E & D300E Articulated Trucks Power Train)
    Axles
    Center Axle Housing
    Differential & Bevel Gear (Center or Rear)
    Differential & Bevel Gear (Front)
    Differential & Bevel Gear (Front)
    Drive Shaft, (Mid Bearing To Rear Axle)
    Drive Shaft, (Mid Bearing To Rear Axle)
    Drive Shaft, (Transfer Gear Case To Center Axle)
    Drive Shaft, (Transfer Gear Case To Center Axle)
    Drive Shaft, (Transfer Gear To Mid Bearing)
    Drive shaft (Transmission Drop Box To Drive Hitch)
    Duo-Cone Seals (Conventional & Inverted)
    Final Drive Planet Carriers & Ring Gears
    Front Axle Housing
    Front Drive Shaft (Transmission To Front Axle)
    Gear Group-Transfer
    Gear Group-Transfer
    Inter-Axle Differential
    Introduction
    Main Drive Shaft (Torque Converter To Transmission)
    Main Drive Shaft (Torque Converter To Transmission)
    Rear Axle Housing
    Scavenge & Transmission Oil Pump
    Secondary Steering Pump Drive
    Secondary Steering Pump Drive
    Tires & Rims
    Tires & Rims
    Torque Converter Accessory Drive Gear
    Torque Converter Lock-Up Valve
    Torque Converter Outlet Relief Valve
    Torque Converter Pump Drive Gears
    Torque Converter & Retarder
    Torque Converter Screen
    Torque Converter Screen
    Transmission Hydraulic Control Valve
    Transmission Oil Filter
    Transmission Output Speed Sensor
    Transmission Output Speed Sensor
    Transmission & Output Transfer Drive
    Transmission Priority Valve
    Transmission Priority Valve
    Transmission Screen
    Wheels, Bearings & Duo-Cone Seals
    Wheels, Bearings & Duo-Cone Seals
 SENR8653 - Disassembly and Assembly (D250E & D300E Articulated Trucks Power Train)
 SENR8654 - Disassembly and Assembly (D250E & D300E Articulated Trucks Machine Systems)
    Accumulator-Brake
    Accumulator-Charge & Test Procedure
    Accumulator-Front
    Another Service Brake System Valve
    Anticavitation Valve
    Ball Resolver Valve
    Body Group
    Body Prop Assembly
    Brake Carriers Lining or Pads
    Cab
    Cab Tilt Cylinder
    Disc Brake Caliper_Pad Assembly
    Duo-Cone Seals (Conventional & Inverted)
    Fender
    Frame Lock Links
    Front Suspension Cylinder
    Fuel Tank
    Hand Metering Pump
    Hoist Control Valve
    Hoist Cylinder
    Hydraulic Manifold
    Hydraulic Tank
    Implement Hydraulic Oil Pump
    Introduction
    Oscillating Hitch
    Rear Suspension Equalizing Frame
    Retarder Control Solenoid Valve
    Seat
    Secondary Steering Pump
    Steering Control Valve
    Steering Cylinder
    Steering Triple Check Valve
    Steering Wheel
    Tailgate Cylinder
    Tailgate Cylinder Valve
    Tailgate
    Tractor & Trailer
    Valve-Foot Brake
 SENR8654 - Disassembly and Assembly (D250E & D300E Articulated Trucks Machine Systems)
 SENR8655 - Disassembly and Assembly (Supplement for D250E & D300E Articulated Trucks - 3306 Engine)
    Aftercooler
    Air Cleaner Assembly
    Air Conditioning Accumulator
    Air Conditioning Compressor
    Air Conditioning Dryer
    Alternator
    Brake Oil Cooler
    Cab (Raise & Lower)
    Crankcase Guard
    Crankshaft Vibration Damper & Pulley
    Electric Starting Motor
    Engine Mounting Group (Rear)
    Engine Oil Cooler
    Engine Oil Filler
    Engine Oil Filter & Oil Filter Base
    Engine, Retarder & Torque Converter
    Engine Support (Front)
    Fan Drive
    Fan Guards
    Fan
    Fuel Priming Pump & Primary Fuel Filter
    Fuel Solenoid Shutoff
    Fuel Transfer Pump
    Hood
    Muffler Group
    Oil Pan
    Oil Pan Plate
    Precleaner Assembly
    Radiator
    Shunt Tank Group
    Starting Solenoid
    Transmission Oil Cooler
    Turbocharger
    Water Pump
    Water Temperature Regulator
 SENR8655 - Disassembly and Assembly (Supplement for D250E & D300E Articulated Trucks - 3306 Engine)
 SENR8656 - Systems Operation (Electronic Programmable Transmission Control (EPTC II) for A)
 SENR8656 - Testing and Adjusting (Electronic Programmable Transmission Control (EPTC II) for A)

EXCERPT:
Tractor Arrangement - D250E
A ring gear mounted on the engine flywheel drives the torque converter (6). The torque converter has an integral lockup clutch which allows the machine to operate in converter drive or direct drive.
Hydraulic retarder (9) - if equipped - is positioned between the engine and the torque converter. The retarder is an auxiliary brake used for continuous speed control during operation on downgrades.
The transmission drive shaft (5) transmits power to the planetary transmission (4). The transmission is a full power shift planetary type which contains six hydraulically actuated clutches to give five forward and two reverse speeds.
The transmission output shaft transmits drive through the output transfer drive (3) to the front and center drive shafts (12 and 2). The front drive shaft is connected to the front differential (11) which transmits torque to the wheel mounted final drives (10). The center drive shaft (2) is connected to the through
hitch drive shaft (1).
The output transfer drive (3) houses an inter-axle differential (13), which divides torque between the tractor and trailer axle differentials.
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