The A300 is that oddball Bobcat that can run in both skid and all-wheel steer, so it sees a lot of pallet work, dirt work, and yard chores. The service manual is what I pull when something deeper than a filter change is going on and I've only got a weekend to sort it out. It's aimed at people who are actually tearing into the loader, engine, hydraulics, or electrical, not just learning the controls. If you're running an A300 in the serial range listed, this is the book you wrench from.
What this manual helps you do
- Diagnose drive issues in the all-wheel steer and skid-steer drive system, and trace hydrostatic problems.
- Check and set hydraulic system pressures when lift, tilt, or auxiliary circuits get weak or jerky.
- Follow step-by-step teardown and reassembly for cylinders, drive motors, and major hydraulic components.
- Troubleshoot electrical faults using wiring diagrams so you can chase down no-starts, sensor issues, and warning lights.
- Replace and adjust mechanical linkages, Bob-Tach parts, and loader arms with the right sequences and specs.
Who this is for
This manual is for an A300 owner-operator, small contractor, farm or rental shop mechanic, or field tech working on an A300 with serial number 521111001 through 521199999. If you just need basic operating instructions or maintenance intervals, you want the operator's handbook instead, not this service manual.
FAQ
Q: Is this a searchable PDF and are the wiring diagrams readable?
A: Yes, these manuals are usually searchable PDFs, and the wiring diagrams are laid out so you can zoom in and read pin numbers and wire colors.
Q: Will this cover my exact A300 machine?
A: If your A300 serial number falls between 521111001 and 521199999, this is the right service manual for your loader.
Q: Is this the right document if I'm planning a major repair?
A: Yes, this is the workshop-level service manual, meant for real repairs and diagnostics, not just basic maintenance.
Bottom line: If your A300's serial tag lands in that range and you're planning to do your own repairs, this is the manual you want. If not, keep looking for the one that matches your serial number.
📘 Show Index
Table of Contents:
- MAINTENANCE SAFETY
- ALPHABETICAL INDEX
- CONTENTS
- FOREWORD
- SAFETY INSTRUCTIONS
- FIRE PREVENTION
- Maintenance
- Operation
- Electrical
- Hydraulic System
- Fueling
- Starting
- Spark Arrestor Exhaust System
- Welding And Grinding
- Fire Extinguishers
- SERIAL NUMBER LOCATION
- Loader Serial Number
- Engine Serial Number
- DELIVERY REPORT
- BOBCAT LOADER INDENTIFICATION
- SAFETY AND MAINTENANCE
- LIFTING AND BLOCKING THE LOADER
- LIFT ARM SUPPORT DEVICE
- Installing The Lift Arm Support Device
- Removing The Lift Arm Support Device
- OPERATOR CAB
- Description
- Raising The Operator Cab
- Lowering The Operator Cab
- Emergency Exit
- TRANSPORTING THE BOBCAT LOADER
- TOWING THE LOADER
- REMOTE START
- Procedure For Loader W/O Attachments Control Harness
- Procedure For Loader With Attachments Control Harness
- Procedure
- SERVICE SCHEDULE
- AIR CLEANER SERVICE
- ENGINE COOLING SYSTEM
- FUEL SYSTEM
- Fuel Specifications
- Filling The Fuel Tank
- Fuel Filter
- Removing Air From The Fuel System
- Fuel Lift Pump Strainer
- ENGINE LUBRICATION SYSTEM
- Checking Engine Oil
- Oil Chart
- Replacing Oil And Filter
- HYDRAULIC / HYDROSTATIC SYSTEM
- Checking And Adding Fluid
- Hydraulic / Hydrostatic Filter Replacement
- Replacing Hydraulic Fluid
- Steering Filter Replacement
- FINAL DRIVE TRANSMISSION (CHAINCASE)
- Checking And Adding Oil
- Replacing The Oil
- FAN GEARBOX
- BOB-TACH
- Inspection And Maintenance
- POWER BOB-TACH
- Inspection And Maintenance
- LUBRICATING THE LOADER
- TIRE MAINTENANCE
- Wheel Nuts
- Tire Rotation
- Tire Mounting
- HYDRAULIC SYSTEM
- HYDRAULIC / HYDROSTATIC SCHEMATICS
- HYDRAULIC SYSTEM INFORMATION
- Troubleshooting
- Tighten Procedures
- CYLINDER (LIFT)
- Checking
- Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- CYLINDER (TILT)
- Checking
- Removal And Installation
- Base Pin Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- CYLINDER (POWER BOB-TACH)
- Checking
- Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- CYLINDER (STEERING)
- Removal (Front)
- Removal (Rear)
- MAIN RELIEF VALVE
- Checking The Main Relief Valve At Front Auxiliary Hydraulics
- Removal and Installation
- Adjustment
- HYDRAULIC CONTROL VALVE
- Actuator Removal And Installation (In Loader)
- Removal And Installation
- Actuator Removal And Installation (Out Of Loader)
- BICS™ Valve Removal And Installation
- BICS™ Valve Lift Arm Bypass Orifice Removal And Installation
- BICS™ Valve Check Valve Removal And Installation
- BICS™ Valve Lock Valve Removal And Installation
- BICS™ Valve Solenoid Removal And Installation
- BICS™ Valve Solenoid Testing
- Identification Chart
- Lift Base End Restrictor
- Load Check Valve
- Main Relief Valve
- Port Relief Valve
- Anti-Cavitation Valve / Port Relief Valve
- Anti-Cavitation Valve
- Lift Spool Removal And Installation
- Tilt Spool Removal And Installation
- Lift And Tilt Spool Disassembly And Assembly
- Auxiliary Spool Removal And Installation
- Auxiliary Electric Solenoid Disassembly And Assembly
- Port-Auxiliary Section Disassembly
- Cleaning And Inspection
- LIFT ARM BYPASS CONTROL VALVE
- Inspecting
- Additional Inspection For Loaders W/ Advanced Hand Controls
- Removal And Installation
- Disassembly And Assembly
- HYDRAULIC PUMP
- Checking The Output Of The Auxiliary Pump
- Checking The Output Of The Steering Pump
- Removal And Installation
- Parts Identification
- Disassembly And Assembly
- HYDRAULIC / HYDROSTATIC FILTER
- Housing Removal And Installation
- Mount Removal And Installation
- HYDRAULIC FLUID RESERVOIR
- Fluid Removal
- Removal And Installation
- Hydraulic Fluid Screen
- BUCKET POSITION VALVE
- Solenoid Removal And Installation
- Solenoid Testing
- Removal And Installation
- Disassembly And Assembly
- REAR AUXILIARY DIVERTER VALVE (EARLY MODELS)
- REAR AUXILIARY DIVERTER VALVE (EARLY MODELS) (CONT’D)
- REAR AUXILIARY DIVERTER VALVE (EARLY MODELS) (CONT’D)
- Disassembly and Assembly
- Inspection
- Solenoid Testing
- Assembly
- REAR AUXILIARY DIVERTER (LATER MODELS)
- REAR AUXILIARY DIVERTER (LATER MODELS) (CONT’D)
- Disassembly And Assembly
- Solenoid Testing
- Inspection
- POWER BOB-TACH BLOCK (EARLY MODELS)
- Removal And Installation
- Disassembly And Assembly
- POWER BOB-TACH BLOCK (LATER MODELS)
- Removal And Installation
- Disassembly And Assembly
- FRONT AUXILIARY HYDRAULIC COUPLER BLOCK
- Removal and Installation
- Disassembly And Assembly
- HYDROSTATIC SYSTEM
- HYDROSTATIC SYSTEM INFORMATION
- Troubleshooting Chart
- Replenishing Valve Function
- HYDROSTATIC MOTOR
- Removal And Installation
- Parts Identification
- Disassembly
- Inspection
- Assembly
- HYDROSTATIC MOTOR CARRIER
- Removal And Installation
- Parts Identification
- Assembly
- CHARGE PRESSURE
- Hydrostatic Charge Pressure Sender
- HYDROSTATIC PUMP
- Pump Controller Removal And Installation
- Hydrostatic Pump Calibration
- Removal And Installation
- Parts Identification (Right Half)
- Parts Identification (Left Half)
- System Check Relief Valves (High Pressure Relief, Charge Check & Bypass Valve)
- Charge Relief Valve
- Pump Separation
- Shaft Seal And Shaft Replacement
- Shaft Seal And Shaft Installation
- Charge Pump Removal
- Charge Pump Inspection
- Charge Pump Installation
- Disassembly
- Inspection
- Assembly
- Pump Neutral Adjustment
- Pump Controller Neutral Adjustment
- DRIVE BELT
- Shield Removal And Installation
- Adjustment
- Replacement
- Tensioner Pulley Removal And Installation
- Tensioner Pulley Tension Spring
- OIL COOLER (SEAL TO CONNECT) (STC)
- Hydraulic Oil Cooler Removal And Installation
- DRIVE SYSTEM
- BRAKE
- Block Removal And Installation
- Block Disassembly And Assembly
- STEERING BLOCK
- Wiring Diagram
- Removal And Installation
- Disassembly And Assembly
- DRIVE COMPONENTS
- Axle Seal Removal And Installation
- Axle, Sprocket And Bearings Removal And Installation
- Drive Chain Removal And Installation
- CHAINCASE
- Front Chaincase Cover Removal And Installation
- Rear Chaincase Cover Removal And Installation
- HUB
- Removal
- Installation
- Disassembly
- Inspection
- Assembly
- MAINFRAME
- SEAT BAR
- Removal And Installation
- Assembling Components
- Compression Spring Disassembly And Assembly
- OPERATOR CAB
- Gas Cylinder Removal And Installation (Early Models)
- Gas Cylinder Removal And Installation (Later Models)
- Gas Cylinder Bracket Disassembly And Assembly
- Removal And Installation
- OPERATOR SEAT
- Removal And Installation
- Seat Belt Removal And Installation
- OPERATOR SEAT (SUSPENSION)
- Removal And Installation
- Slide Rail Removal And Installation
- Cushion Removal And Installation
- Back Removal And Installation
- Shock Removal And Installation
- BOB-TACH
- Removal And Installation
- Bob-Tach Lever And Wedge
- POWER BOB-TACH
- Removal And Installation
- Power Bob-Tach Lever And Wedge
- Pivot Pin Bushing And Seal Replacement
- LIFT ARMS
- Stabilizer Bar Removal And Installation
- Link Removal And Installation
- Removal And Installation
- Installation Of Lift Arms
- REAR GRILL
- REAR DOOR
- Removal And Installation
- Adjusting The Rear Door Latch
- FUEL TANK
- Removal And Installation
- Fuel Level Sender
- CONTROL
- Joystick Testing (Right & Left)
- Joystick Removal (Right & Left)
- Joystick Boot Removal (Right & Left)
- Lever Assembly Removal (Right & Left)
- CONTROL PANEL
- INSIDE ACCESS PANEL
- Panel Removal (Right)
- Panel Removal (Left)
- ELECTRICAL SYSTEM & ANALYSIS
- ELECTRICAL SCHEMATICS
- ELECTRICAL SYSTEM INFORMATION
- Troubleshooting
- Description
- Fuse Location
- Relay Switch Location
- Solenoid Test
- BATTERY
- Removal And Installation
- Servicing The Electrical System
- Using A Booster Battery (Jump Starting)
- ALTERNATOR
- Adjusting The Alternator Belt
- Alternator Identification
- Charging System Check
- Alternator Voltage Test
- Low Voltage Test
- High Voltage Test
- Removal And Installation
- Rectifier Continuity (Diode) Test
- Alternator Regulator Test
- Disassembly
- Stator Continuity Test
- Stator Ground Test
- Rotor Continuity Test
- Rotor Ground Test
- Assembly
- STARTER
- Checking
- Removal And Installation
- Parts Identification
- Disassembly And Assembly
- Inspection And Repair
- No Load Test
- INSTRUMENT PANEL
- Left Panel
- Right Panel – (Standard) (With Key Switch)
- Right Panel – (Deluxe) (With Keyless Start)
- Right Panel Set Up Display Options (Deluxe)
- Option and Field Accessory Panels (If Equipped)
- Standard Panel Removal And Installation (Right Side)
- Deluxe Panel Removal And Installation (Right Side)
- Standard & Deluxe Panel Removal And Installation (Left Side)
- LIGHTS
- Front Removal And Installation
- Rear Removal And Installation
- BOBCAT 2001 CONTROLLER
- Removal And Installation
- Identification Chart
- AWS CONTROLLER
- Removal
- Identification Chart
- SPEED SENSOR
- DIAGNOSTICS SERVICE CODES
- Display
- Number Codes List
- STEERING SOLENOID
- BICS™ SYSTEM
- Inspecting The BICS™ Controller (Engine STOPPED – Key ON)
- Inspecting Deactivation Of The Auxiliary Hydraulics System (Engine STOPPED – Key ON)
- Inspecting The Seat Bar Sensor (Engine RUNNING)
- Inspecting The Traction Lock (Engine RUNNING)
- Troubleshooting Chart
- Troubleshooting Guide.
- SEAT BAR SENSOR
- Troubleshooting Chart
- Test
- Removal And Installation
- BICS™ Circuit Test
- TRACTION LOCK
- Troubleshooting Chart
- Description Of The Control System
- Inspecting The Control System
- WHEEL POSITION SENSORS
- Operation
- Wheel Alignment (Failed Sensor)
- Testing
- Sensor Removal And Installation
- Wheel Alignment (Field Adjustment)
- Wheel Alignment (Calibration)
- SERVICE PC (LAPTOP COMPUTER)
- Connecting The Service PC To Remote Start Tool
- LIFT AND TILT ACTUATOR CALIBRATION
- ELECTRICAL/HYDRAULIC CONTROLS REFERENCE
- Controls Identification Chart
- ENGINE SERVICE
- TROUBLESHOOTING
- ENGINE SPEED CONTROL
- Removal
- Disassembly
- Speed Control Cable
- MUFFLER
- AIR CLEANER
- Housing Removal And Installation
- RADIATOR
- COOLING FAN
- Drive Tension Pulley Removal And Installation
- Gearbox / Blower Housing Removal And Installation
- Blower Removal And Installation
- Gearbox Parts Identification
- Gearbox Disassembly
- Gearbox Assembly
- Gearbox, Checking Backlash
- ENGINE COMPONENTS AND TESTS
- Engine Compression, Checking
- Glow Plug, Checking
- Fuel Shut-Off Solenoid Checking
- Fuel Shut-Off Solenoid Removal And Installation
- Fuel Injection Pump Removal
- Fuel Injection Pump Timing
- Fuel Injection Pump Installation
- Fuel Injector Removal And Installation
- Fuel Injector, Checking
- Fuel Injector Disassembly
- Fuel Injector Assembly
- Timing Belt Inspection
- Timing Belt Removal
- Timing Belt Installation
- Timing Belt, Replacement In The Loader
- Valve Clearance Adjustment
- Valve Timing, Checking
- Thermostat, Oil Pressure Control Valves & Heater Connections
- ENGINE
- Removal And Installation
- Mount Replacement
- FLYWHEEL AND HOUSING
- Flywheel Removal And Installation
- Ring Gear Removal And Installation
- Flywheel Housing Removal And Installation
- RECONDITIONING THE ENGINE
- Deutz Engine Tools Identification Chart
- Disassembly
- Assembly
- Cylinder, Checking
- Camshaft Bearing, Checking
- Camshaft Bearing, Removal And Installation
- Control Rod Guide Bushing Removal
- Control Rod Guide Bushing Installation
- Rear Cover Seal Removal And Installation
- Crankshaft, Checking
- Connecting Rod, Checking
- Piston, Checking
- Piston Pin, Checking
- Piston Rings Installation
- Piston Installation On The Connecting Rod
- Cylinder Head Disassembly
- Valves, Checking
- Valve Seats, Checking
- Cylinder Head Assembly
- Rocker Arm And Bracket, Checking
- Front Cover Disassembly
- Front Cover Assembly
- Turbo Charger Removal and Installation
- Crankshaft Gear Mounting Bolt Torque Procedure
- HEATING, VENTILATION, AIR CONDITIONING
- AIR CONDITIONING SYSTEM FLOW
- COMPONENTS
- SAFETY
- REGULAR MAINTENANCE
- Filter Elements Removal And Installation
- Compressor Drive Belt Inspection
- Cleaning The Condenser
- BASIC TROUBLESHOOTING
- Poor A/C Performance
- Cleaning The A/C Evaporator Coil & Heater Coil
- Receiver / Drier Sight Glass Inspection
- Compressor Drive Belt Inspection
- Checking The Electrical System
- Engine Coolant Bypassing The Heater Valve
- Heater Valve Not Opening Or Closing
- GENERAL AIR CONDITIONING SERVICE GUIDELINES
- Compressor Oil
- Compressor Oil Check
- Component Replacement And Refrigeration Leaks
- SYSTEM TROUBLESHOOTING CHART
- Gauge Pressure Related Troubleshooting
- Troubleshooting Tree
- TEMPERATURE / PRESSURE
- AIR CONDITIONING SERVICE
- SYSTEM CHARGING AND RECLAMATION
- Reclamation Procedure
- Charging Procedure With A Manifold Gauge Set
- Charging Procedure
- COMPRESSOR
- Removal And Installation
- Compressor Clutch Disassembly
- CONDENSER
- RECEIVER / DRIER
- PRESSURE RELIEF VALVE
- PRESSURE SWITCH
- EVAPORATOR / HEATER UNIT
- Removal And Installation
- Disassembly And Assembly
- THERMOSTAT
- EXPANSION VALVE
- EVAPORATOR
- HEATER COIL
- Removal And Installation With A/C
- Removal And Installation Without A/C
- HEATER / AC FAN
- Removal And Installation
- Disassembly And Assembly
- Wire Connector Removal And Installation
- HEATER VALVE
- Removal And Installation
- Disassembly And Assembly
- SPECIFICATIONS
- LOADER SPECIFICATIONS (A300)
- Machine Dimensions
- Performance
- Controls
- Engine
- Hydraulic System
- Electrical
- Drive System
- Capacities
- Tires
- ENGINE SPECIFICATIONS
- General
- Fuel System
- Valve And Valve Guide And Seat Insert
- Piston And Rings
- Connecting Rod
- Cylinder Head And Block
- Crankshaft And Main Bearings
- Camshaft And Bearings
- Oil Pump
- LOADER TORQUE
- TORQUE SPECIFICATIONS FOR BOLTS
- Torque For General SAE Bolts
- Torque For General Metric Bolts
- Torque For Kubota Metric Engine Bolts
- HYDRAULIC CONNECTION SPECIFICATIONS
- O-ring Face Seal Connection
- Straight Thread O-ring Fitting
- Tubelines And Hoses
- Flare Fitting
- O-ring Flare Fitting
- Port Seal Fitting
- HYDRAULIC FLUID SPECIFICATIONS
- CONVERSIONS
- Decimal And Millimeter Equivalents
- Revision No: A300-1
- Date: 24 May 2002
- Product: Bobcat Loader
- Model: A300
- Manual No: 6901756 (3-02)
- PARTS MANAGER
- SERVICE MANAGER X
- SALES MANAGER
- Revision No: A300-2
- Date: 30 October 2003
- Product: Bobcat Loader
- Model: A300
- Manual No: 6901756 (3-02)
- PARTS MANAGER
- SERVICE MANAGER X
- SALES MANAGER
- Revision No: A300-3
- Date: 8 December 2003
- Product: Bobcat Loader
- Model: A300
- Manual No: 6901756 (3-02)
- PARTS MANAGER
- SERVICE MANAGER X
- SALES MANAGER
- Revision No: A300-4
- Date: 4 May 2004
- Product: Bobcat Loader
- Model: A300
- Manual No: 6901756 (3-02)
- PARTS MANAGER
- SERVICE MANAGER X
- SALES MANAGER
- Revision No: A300-5
- Date: 23 March 2006
- Product: Bobcat Loader
- Model: A300
- Manual No: 6901756 (3-02)
- PARTS MANAGER
- SERVICE MANAGER X
- SALES MANAGER
- Revision No: A300-6
- Date: 21 March 2008
- Product: Bobcat Loader
- Model: A300
- Manual No: 6901756 (3-08)
- PARTS MANAGER
- SERVICE MANAGER X
- SALES MANAGER
- Revision No: A300-7
- Date: 23 July 2010
- Product: Bobcat Loader
- Model: A300
- Manual No: 6901756 (7-10)
- SMR
- A300-1
- A300-2
- A300-3
- A300-4
- A300-5
- A300-6
- A300-7
- A300-8
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