The Bobcat A300 is the all-wheel steer loader that flips between skid and wheel mode, so it ends up on concrete, yards, and farm lots where you don't want to tear up ground. The people who grab this service manual are the ones actually turning wrenches: small contractors, farm shops, rental yards, and independent mechanics like me who already work on Cat and Deere. They're trying to get solid teardown and reassembly steps, hydraulic and hydrostatic specs, and wiring info so they're not guessing.
What this manual helps you do
- Diagnose drive and steering complaints on the A300's hydrostatic and all-wheel steer systems, and trace them back to pumps, motors, or controls
- Check and set hydraulic and charge pressures with a gauge, using the correct test ports and adjustment points
- Follow step-by-step procedures to pull engines, pumps, cylinders, and drive motors, then put them back together in the right order
- Troubleshoot electrical faults using readable wiring diagrams, connector callouts, and harness routing info
- Replace and adjust linkages, Bob-Tach components, and loader arms so the machine lifts straight and locks attachments correctly
Who this is for
This is for anyone working on a Bobcat A300 loader in the serial range 526511001 to 526599999 who needs real shop-level repair info, not just safety and daily checks. If you only want operating tips or basic 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 clear?
A: Yes, these manuals are usually text searchable, and the wiring diagrams are laid out so you can zoom in and read pin numbers and wire colors.
Q: Does it fit my A300 if my serial number is outside 526511001-526599999?
A: No, this one is written around that specific serial range. If you're outside it, you should look for the matching manual for your exact range.
Q: Is this the right thing if I'm just changing fluids and filters?
A: It will cover that, but it's overkill if that's all you need. This is meant for deeper diagnostics and repairs.
Bottom line: If you own or service an A300 in that serial range and you're doing real repair work, this is the right manual. If your serial doesn't match, or you only need how-to-drive info, skip it.
📘 Show Index
Table of Contents:
- MAINTENANCE SAFETY
- ALPHABETICAL INDEX
- CONTENTS
- FOREWORD
- SAFETY INSTRUCTIONS
- SERIAL NUMBER LOCATION
- Loader Serial Number
- Engine Serial Number
- DELIVERY REPORT
- BOBCAT LOADER IDENTIFICATION
- 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
- Cleaning Cooling System
- Checking The Coolant Level
- Adding The Coolant
- FUEL SYSTEM
- Fuel Specifications
- Filling The Fuel Tank
- Fuel Filter
- Removing Air From The Fuel System
- ENGINE LUBRICATION SYSTEM
- Checking Engine Oil
- Oil Chart
- Replacing Oil And Filter
- HYDRAULIC/HYDROSTATIC SYSTEM
- Checking And Adding Fluid
- Hydraulic Fluid Chart
- Hydraulic/Hydrostatic Filter Replacement
- Replacing Hydraulic Fluid And Case Drain Filters
- FINAL DRIVE TRANSMISSION (CHAINCASE)
- Checking And Adding Oil
- Removing 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 Main Relief
- Adjustment
- Removal And Installation
- HYDRAULIC CONTROL VALVE (2 PIECE CASTING)
- Identification
- Removal And Installation
- Actuator Removal And Installation (In Loader)
- Actuator Removal And Installation (Out Of Loader)
- BICS™ Valve Removal And Installation
- BICS™ Valve Lift Arm By-Pass 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
- HYDRAULIC CONTROL VALVE (1 PIECE CASTING)
- Identification
- Removal And Installation
- Actuator Removal And Installation (In Loader)
- Identification Chart
- BICS™ Valve, Lift Load Check Valve Removal And Installation
- Load Check Valve Removal And Installation (Tilt & Auxiliary)
- Anti-Cavitation Valve (Lift, Rod End)
- Port Relief/Anti-Cavitation Valve (Lift, Base End)
- Port Relief/Anti-Cavitation Valve (Tilt, Base End)
- Port Relief/Anti-Cavitation Valve (Tilt, Rod End)
- Port Relief Valve
- Plug Removal
- End Cap Block Removal and Installation
- Lift Spool Removal and Installation
- Auxiliary Spool Removal And Installation
- Auxiliary Solenoid Disassembly and Assembly
- BICS™ Valve Solenoid Disassembly And Assembly
- BICS™ Valve, Lock Valve Removal And Installation
- BICS™ Valve, Lift Arm By-Pass Orifice Disassembly And Assembly
- Main Relief Valve
- BICS™ Valve, Check Valve Removal And Installation
- LIFT ARM BY-PASS 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 PUMP (HIgh FLOW)
- Checking The Output Of The High Flow Pump (30 GPM And 40 GPM)
- Removal And Installation (30 GPM And 40 GPM)
- Parts Identification (30 GPM And 40 GPM)
- Disassembly And Assembly (30 GPM And 40 GPM)
- 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
- HIGH FLOW VALVE
- Checking The High Flow Relief Valve
- High Flow Relief Valve Adjustment Procedure
- Removal and Installation
- Disassembly And Assembly
- Solenoid Testing
- REAR AUXILIARY DIVERTER VALVE
- Removal And Installation
- Disassembly And Assembly
- Solenoid Testing
- Inspection
- POWER BOB-TACH BLOCK
- 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
- Disassembly
- Assembly
- CHARGE PRESSURE SENDER
- Testing
- Removal And Installation
- 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 & By-Pass 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
- Identification
- 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
- MAIN FRAME
- 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
- Seat Belt Removal And Installation
- Cushion Removal And Installation
- Back Removal And Installation
- Shock Removal And Installation
- 3-Point Seat Belt 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
- Striker Removal and Installation
- Striker Disassembly and Assembly
- Door Latch and Catch Adjustment
- Latch Removal And Installation
- 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 CONTROLLER
- Identification Chart
- Removal And Installation
- 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
- Troubleshooting Chart
- SEAT BAR SENSOR
- Troubleshooting Chart
- Test
- Removal And Installation
- BICS™ Circuit Test
- TRACTION LOCK
- Troubleshooting
- 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
- CALIBRATION
- Lift And Tilt Calibration Procedure
- Hydrostatic Pump Calibration
- ELECTRICAL/HYDRAULIC CONTROLS REFERENCE
- Controls Identification Chart
- FLYWHEEL RPM SENSOR
- ENGINE SERVICE
- TROUBLESHOOTING
- ENGINE SPEED CONTROL
- Removal
- Disassembly
- Speed Control Cable
- MUFFLER
- AIR CLEANER
- Housing Removal And Installation
- RADIATOR
- Removal And Installation
- Mount Removal (Early Loaders)
- Mount Removal (Later Loaders)
- 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
- Removal And Installation
- Mount Replacement
- Removal And Installation Tools
- FLYWHEEL AND HOUSING
- Flywheel Removal And Installation
- Ring Gear Removal And Installation
- Flywheel Housing Removal And Installation
- RECONDITIONING THE ENGINE
- Engine Tools Identification Chart
- Compression Pressure
- Cylinder Head Clearance
- Valve Cover, Injector Nozzle And Seal Removal And Installation
- Checking Nozzle Injection Pressure
- Nozzle Spraying Condition
- Valve Seat Tightness
- Rocker Arm And Push Rod Disassembly And Assembly
- Valve Clearance
- Cylinder Head And Tappet Disassembly And Assembly
- Selecting Cylinder Head Gasket Disassembly And Assembly
- Valve Disassembly And Assembly
- Engine Timing (TDC)
- Injection Pump Housing Removal
- Injection Pump Governor Housing Removal And Installation
- Injection Pump Governor Fork Lever Removal And Installation
- Injection Pump Governor Lever Removal And Installation
- Injection Pump Stop Lever Removal And Installation
- Injection Pump Fuel Camshaft And Governor Weight Removal And Installation
- Injection Pump Removal and Installation
- Injection Pump Housing Installation
- Injection Pump Timing
- Fan Drive Pulley Disassembly And Assembly
- Water Pump Disassembly And Assembly
- Oil Cooler And Water Pipe Disassembly And Assembly
- Gearcase Cover Disassembly And Assembly
- Idle Gear And Camshaft Disassembly And Assembly
- Oil Pan And Oil Strainer Disassembly And Assembly
- Connecting Rod Cap Disassembly And Assembly
- Piston Disassembly And Assembly
- Piston Ring And Connecting Rod Disassembly And Assembly
- Flywheel And Crankshaft Disassembly And Assembly
- Bearing Case Cover Disassembly And Assembly
- Flywheel Housing Disassembly And Assembly
- Crankcase No. 2 Disassembly And Assembly
- Crankcase No. 1 And No. 2 Disassembly And Assembly
- Crankshaft Disassembly And Assembly
- Cylinder Head Surface Flatness
- Cylinder Head Flaw
- Valve Recessing
- Valve Lapping
- Clearance Between Valve Stem And Valve Guide
- Replacing Valve Guide
- Correcting Valve And Valve Seat
- Free Length And Tilt Of Valve Spring
- Valve Spring Setting Load
- Oil Clearance Between Rocker Arm Shaft And Bearing
- Oil Clearance Between Tappet And Tappet Guide Bore
- Timing Gear Backlash
- Idler Gear Side Clearance
- Camshaft Side Clearance
- Camshaft Alignment
- Cam Height
- Oil Clearance Between Idler Gear Shaft And Idler Gearing Bushing
- Replacing Idler Gear Bushing
- Piston Pin Bore I.D.
- Oil Clearance Between Piston Pin And Small End Bushing
- Replacing Small End Bushing
- Clearance Between Piston Ring And Groove
- Piston Ring Gap
- Connecting Rod Alignment
- Crankshaft Side Clearance
- Crankshaft Alignment
- Oil Clearance Between Crankpin And Crankpin Bearing
- Oil Clearance Between Crankshaft Journal And Crankshaft Bearing
- Replacing Crankshaft Sleeve
- Cylinder Bore I.D.
- Correcting Cylinder (Oversize +0.5 mm)
- Engine Oil Pressure
- Rotor Lobe Clearance
- Clearance Between Outer Rotor And Pump Body
- Clearance Between Rotor And Cover
- Relief Valve
- Thermostat Valve Opening Temperature
- Radiator Water Leakage
- Radiator Cap Air Leakage
- Thermostat Assembly
- Intake Air Heater
- Air Cleaner, Intake Pipe, Inlet Pipe And Muffler
- Oil Pipe
- Turbocharger
- 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
- Compressor Drive Belt Inspection
- Checking The Electrical System
- Engine Coolant By-Passing 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
- BLOWER FAN
- Removal And Installation
- Disassembly And Assembly
- Wire Connector Removal and Installation
- HEATER VALVE
- Removal and Installation
- Disassembly And Assembly
- SPECIFICATIONS
- A300 LOADER SPECIFICATIONS
- Machine Dimensions
- Performance
- Controls
- Engine
- Hydraulic System
- Electrical
- Drive System
- Capacities
- Tires
- ENGINE SPECIFICATIONS
- General
- Fuel System
- Valve And Valve Timing
- Valve Spring
- Piston And Piston Ring
- Connecting Rod
- Cylinder Head
- Crankshaft
- Cylinder Bore
- Oil Pump
- Rocker Arm
- Tappet
- Camshaft
- Thermostat
- Timing Gear
- Intake Air Heater
- Turbocharger Compressor Shaft
- TORQUE SPECIFICATIONS FOR BOLTS
- Torque For General SAE Bolts
- Torque For General Metric Bolts
- Torque For Kubota Metric Engine Bolts
- Tightening Torques For General Use Screws, Bolts And Nuts
- 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
- SMR
- A300-1
- A300-2
- A300-3
- A300-4
- A300-5
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