A 773 skid-steer is the classic mid-size Bobcat you see loading trucks, running augers, forks, and grading work. The service manual is what the mechanic, not the operator, grabs when the machine is down and a voltmeter or pressure gauge comes out. Around my shop I use this kind of manual when I'm chasing a hydraulic issue, sorting out wiring, or putting a drive system back together with the right specs.
What this manual helps you do
- Diagnose hydraulic and hydrostatic problems, then check pressures and flows against Bobcat's specs for this 773 series
- Trace and repair electrical faults using wiring diagrams, connector callouts, and step-by-step test procedures
- Follow teardown and reassembly procedures on the engine, drive motors, pumps, and cylinders with correct sequences and references
- Adjust and verify chain case, controls, and linkage so the loader drives straight, lifts square, and the Bob-Tach locks correctly
- Replace major components and set them up right the first time, instead of guessing on adjustments or torque orders
Who this is for
This manual is for anyone working on a Bobcat 773 loader in the serial range 519211001 to 519299999: small contractors, owner-operators, shop mechanics, and rental fleets. If you only need basic operating tips, safety info, or daily maintenance, 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 scanned clearly enough to zoom in on wire colors and pin IDs.
Q: My 773 has a different serial number. Will this still match my machine?
A: It's written for 519211001-519299999. If your plate is outside that range, some procedures and wiring can differ, so you really want the manual that matches your serial block.
Q: I'm just changing fluids and filters. Is this overkill?
A: For basic fluids and grease points, yes. Use the operator's handbook. This service manual is for real troubleshooting and repair work.
Bottom line: If your 773's serial number falls between 519211001 and 519299999 and you're doing real repair work, this is the right Bobcat service manual to buy.
📘 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 Lift Arm Support Device
- Removing 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
- SERVICE SCHEDULE
- AIR CLEANER SERVICE
- Checking
- Replacing Filter Element(s)
- ENGINE COOLING SYSTEM
- Cleaning The Cooling System
- Checking The Coolant Level
- Replacing 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
- Replacing Hydraulic/Hydrostatic Filter
- Replacing Hydraulic Fluid
- Breather Cap
- FINAL DRIVE TRANSMISSION (CHAINCASE)
- Checking And Adding Oil
- Removing Oil From The Chaincase
- FAN GEARBOX
- BOB-TACH
- Inspection And Maintenance
- POWER BOB-TACH (OPTION)
- Inspection And Maintenance
- LUBRICATION OF THE BOBCAT LOADER
- TIRE MAINTENANCE
- Wheel Nuts
- Rotating
- Mounting
- SPARK ARRESTOR MUFFLER
- HYDRAULIC SYSTEM
- HYDRAULIC/HYDROSTATIC SCHEMATICS
- HYDRAULIC SYSTEM INFORMATION
- Tighten Procedures
- Troubleshooting Chart
- CYLINDER (LIFT)
- Checking
- Removal And Installation
- Identification
- Disassembly
- Assembly
- CYLINDER (TILT)
- Checking
- Removal And Installation
- Rod End Pivot Pin Bushing And Seal Replacement
- Base End Pivot Pin Replacement
- Identification
- Disassembly
- Assembly
- CYLINDER (POWER BOB-TACH)
- Checking
- Removal And Installation
- Identification
- Disassembly
- Assembly
- MAIN RELIEF VALVE
- Checking
- Adjustment
- Removal and Installation
- HYDRAULIC CONTROL VALVE (FOOT CONTROL)
- Removal And Installation
- BICS Valve Removal And Installation
- BICS Valve, Lift Arm By-Pass Orifice Disassembly And Assembly
- BICS Valve, Check Valve Disassembly And Assembly
- BICS Valve Lock Valve Disassembly And Assembly
- BICS Valve Solenoid Disassembly And Assembly
- 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
- Rubber Boot
- Lift And Tilt Lock Block
- Lift Spool and Detent
- Tilt Spool Removal And Installation
- Auxiliary Spool Removal And Installation
- Auxiliary Electric Solenoid Disassembly
- Port-Auxiliary Section Disassembly
- Cleaning And Inspection
- HYDRAULIC CONTROL VALVE (ADVANCED CONTROL SYSTEM) (ACS)
- Description
- Removal and Installation
- 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
- Actuator Removal And Installation
- Identification Chart (ACS)
- 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
- Port-Auxiliary Section
- Cleaning And Inspection
- LIFT ARM BY-PASS CONTROL VALVE
- Inspecting
- Additional Inspection For Loaders With Advanced Hand Controls
- Removal And Installation
- Disassembly And Assembly
- HYDRAULIC PUMP (ALUMINUM)
- Checking The Output Of The Hydraulic Pump Without Power Bob-Tach.
- Checking The Output Of The Hydraulic Pump With Power Bob-Tach.
- Removal And Installation
- Parts Identification
- Disassembly
- Inspection
- Assembly
- HYDRAULIC PUMP (ALUMINUM) (HI FLOW)
- Checking The Output Of The High Flow Pump
- Removal And Installation
- Parts Identification
- Disassembly And Assembly
- Inspection
- Assembly
- HYDRAULIC PUMP (CAST IRON)
- Check The Output Of The Hydraulic Pump Without Power Bob-Tach
- Check The Output Of The Hydraulic Pump With Power Bob-Tach.
- Removal And Installation
- Identification
- Disassembly And Assembly
- HYDRAULIC PUMP (CAST IRON) (HI FLOW)
- Check The Output Of The High Flow Pump
- Removal And Installation
- Identification
- Disassembly And Assembly
- HYDRAULIC FILTER HOUSING
- HYDRAULIC FLUID RESERVOIR
- Fluid Removal
- Removal And Installation (Early Style)
- Removal And Installation (Later Style)
- BUCKET POSITION VALVE
- Solenoid Removal And Installation
- Solenoid Testing
- Removal and Installation
- Disassembly And Assembly
- SELECT VALVE
- Checking The High Flow Pump Relief Valve
- Removal and Installation
- Disassembly And Assembly
- Solenoid Testing
- REAR AUXILIARY DIVERTER VALVE (SINGLE SHUTTLE)
- Removal And Installation
- Disassembly and Assembly
- Inspection
- Solenoid Testing
- REAR AUXILIARY DIVERTER VALVE (DUAL SHUTTLE)
- Removal And Installation
- Disassembly And Assembly
- Inspection
- Solenoid Testing
- POWER BOB-TACH BLOCK (ALUMINUM GEAR PUMP)
- Removal And Installation
- Disassembly And Assembly
- POWER BOB-TACH BLOCK (CAST IRON GEAR PUMP)
- Removal And Installation
- Disassembly And Assembly
- FRONT AUXILIARY PRESSURE RELIEF BLOCK
- Removal And Installation
- Disassembly And Assembly
- Front Auxiliary Pressure Relief Block Inspection
- Solenoid Testing
- 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
- Assembly
- Carrier Shaft Seal Replacement
- Carrier Removal And Installation
- Carrier Parts Identification
- Carrier Disassembly
- Carrier Assembly
- CHARGE PRESSURE
- Sender Removal And Installation
- Checking Charge Pressure
- Adjusting
- HYDROSTATIC PUMP
- Replenishing/High Pressure Relief Valve
- Removal And Installation
- Parts Identification (Right Half)
- Parts Identification (Left Half)
- Hydraulic Pump Removal And Installation
- Pump Separation
- Disassembly
- Assembly
- DRIVE BELT
- Shield Removal And Installation
- Drive Belt Adjusting
- Drive Belt Replacement
- Tensioner Pulley Removal And Installation
- Tensioner Pulley Parts Identification
- Tensioner Pulley Disassembly
- Tensioner Pulley Assembly
- OIL COOLER
- DRIVE SYSTEM
- BRAKE
- Pedal Removal And Installation
- Pedal Disassembly And Assembly
- Switch Operated Parking Brake
- Disk Removal And Installation
- DRIVE COMPONENTS
- Axle Seal Removal And Installation
- Axle Sprocket And Bearings Removal And Installation
- Chain Removal And Installation
- CHAINCASE
- Checking And Adding Oil
- Removing The Oil
- Front Cover Removal And Installation
- Center Cover Removal And Installation
- Rear Cover Removal And Installation
- MAIN FRAME
- SEAT BAR
- Removal And Installation
- Assembling Components
- Compression Spring Disassembly And Assembly
- OPERATOR CAB
- Gas Cylinder Removal And Installation
- Gas Cylinder Disassembly
- Removal And Installation
- OPERATOR SEAT
- Removal And Installation
- Seat Belt Removal And Installation
- OPERATOR SEAT (SUSPENSION)
- Removal And Installation
- Seat Belt Inspection (Suspension)
- Slide Rail 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
- Pivot Pin Bushing And Seal Replacement
- POWER BOB-TACH
- Removal And Installation
- Power Bob-Tach Lever And Wedge
- Pivot Pin Bushing And Seal Replacement
- LIFT ARM
- Removal And Installation
- Link Removal And Installation
- Stabilizer Bar Removal And Installation
- REAR GRILL
- Gas Cylinder Removal And Installation
- Removal And Installation
- REAR DOOR
- Removal And Installation
- Striker Removal and Installation
- Striker Disassembly and Assembly
- Door Latch and Catch Adjustment
- Latch Removal and Installation (Early Style)
- Latch Removal and Installation (Later Style)
- FUEL TANK
- Removal And Installation
- Fuel Level Sender
- Fuel Fill Screen
- CONTROL PEDALS
- Removal And Installation
- Pedal Adjustment
- Crossbar Linkage Removal and Installation
- Lift Foot Pedal Linkage Removal and Installation
- Tilt Foot Pedal Linkage Removal and Installation
- CONTROL PEDALS (ACS)
- Foot Sensor Removal And Installation
- Foot Pedal Removal And Installation
- Foot Pedal Linkage Disassembly And Assembly
- CONTROL PANEL
- Removal and Installation
- Shock Removal And Installation
- Shaft Removal And Installation
- Shaft Disassembly And Assembly
- Linkage Removal And Installation
- Linkage Adjustment
- Linkage Neutral Adjustment
- CONTROL HANDLE
- Control Lever Removal And Installation
- Control Lever Boot
- CONTROL HANDLE (ADVANCED HAND CONTROL) (AHC)
- Components Identification
- Handle Control Unit Removal And Installation
- Control Handle Removal and Installation
- Control Handle Disassembly and Assembly
- Control Lever Removal and Installation
- Control Lever Boot
- CONTROL HANDLE (ADVANCED HAND CONTROL) (AHC) W/PUSH BUTTON FLOAT
- Components Identification
- Handle Sensor Removal And Installation
- Control Handle Removal and Installation
- Control Handle Disassembly and Assembly
- Control Lever Removal and Installation
- Control Lever Boot
- CONTROL HANDLE (ADVANCED CONTROL SYSTEM) (ACS) ADVANCED HAND CONTROL
- Components Identification
- Handle Sensor Removal And Installation
- Control Handle Removal and Installation
- Control Handle Disassembly and Assembly
- Control Lever Removal and Installation
- Control Lever Boot
- CONTROL HANDLE (ADVANCED CONTROL SYSTEM) (ACS) SELECTABLE HAND/FOOT CONTROL
- Components Identification
- Handle Sensor Removal And Installation
- Control Handle Removal and Installation
- Control Handle Disassembly and Assembly
- Control Lever Removal and Installation
- Control Lever Boot
- ELECTRICAL SYSTEM
- ELECTRICAL SCHEMATICS
- ELECTRICAL SYSTEM INFORMATION
- Troubleshooting Chart
- Description
- Fuse Location
- Relay Switch Location
- Solenoid Test
- BATTERY
- Removal And Installation
- Servicing
- Using A Booster Battery (Jump Starting)
- ALTERNATOR (55 AMP)
- Adjusting The Alternator Belt
- Alternator Output Test
- Rectifier (Diode) Test
- Alternator Regulator Test
- Removal And Installation
- Disassembly
- Stator Continuity Test
- Stator Ground Test
- Rotor Continuity Test
- Rotor Ground Test
- Rectifier Continuity (Diode) Test
- Assembly
- ALTERNATOR (90 AMP)
- 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 (NIPPONDENSO)
- Checking
- Removal And Installation
- Parts Identification
- Disassembly
- Inspection And Repair
- No Load Test
- Assembly
- STARTER (VALEO)
- 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 Setup Display Options (Deluxe)
- Passwords
- Changing the Password
- Option and Field Accessory Panels
- Removal And Installation
- Front Accessory Panel Removal And Installation
- LIGHTS
- Front Removal And Installation
- Rear Removal And Installation
- BOBCAT CONTROLLER
- Identification Chart
- Removal And Installation
- DIAGNOSTICS
- 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)
- Inspecting The Lift Arm By-Pass Control
- Additional Inspection For Loaders With Advanced Hand Controls (AHC)
- Troubleshooting Chart
- Troubleshooting Guide.
- SEAT BAR SENSOR
- Troubleshooting Chart
- Test
- Removal And Installation
- BICS™ Circuit Test
- TRACTION LOCK
- Troubleshooting Chart
- Inspecting
- Solenoid Removal And Installation
- Guide Removal
- Guide Installation
- ADVANCE HAND CONTROL (AHC) SYSTEM
- Components Identification
- Troubleshooting Guide
- Parts Identification
- AHC Controller Removal And Installation
- Handle Control Unit Connector
- Switch Handle Removal and Installation
- Actuators Disassembly and Assembly
- ADVANCED HAND CONTROL (AHC) SYSTEM (W/ PUSH BUTTON FLOAT)
- Components Identification
- Troubleshooting Guide
- Controller Connector And Wire Identification
- AHC Controller Removal And Installation
- Handle Sensor Removal And Installation
- Handle Sensor Connector
- Switch Handle Removal and Installation
- Actuators Disassembly and Assembly
- ADVANCED CONTROL SYSTEM (ACS) ADVANCED HAND CONTROL
- Components Identification
- Troubleshooting Guide
- Controller, Connector And Wire Identification
- ACS Controller Removal And Installation
- Handle Sensor Connector
- Switch Handle Removal
- Switch Handle Installation
- Actuators Disassembly And Assembly
- ADVANCED CONTROL SYSTEM (ACS) SELECTABLE HAND/FOOT CONTROL
- Components Identification
- Troubleshooting Guide
- Controller, Connector And Wire Identification
- ACS Controller Removal And Installation
- Handle Sensor Connector
- Switch Handle Removal
- Switch Handle Installation
- Actuators Disassembly And Assembly
- Handle Lock Solenoid Removal And Installation
- Handle Lock Solenoid Disassembly And Assembly
- Handle Lock Solenoid Connector
- Calibration Procedure
- Foot Sensor Disassembly And Assembly
- Foot Sensor Connector
- Foot Lock Solenoid Removal And Installation
- Foot Lock Solenoid Connector
- ELECTRICAL/HYDRAULIC CONTROLS REFERENCE
- Controls Identification Chart
- ENGINE SERVICE
- TROUBLESHOOTING
- ENGINE SPEED CONTROL
- Removal And Installation
- Disassembly
- MUFFLER
- AIR CLEANER
- Removal And Installation (Non Turbo)
- Removal And Installation ( Turbo)
- RADIATOR
- COOLING FAN
- Drive Tension Pulley Removal And Installation
- Gearbox/Blower Housing Removal And Installation
- Blower Housing Grill Removal And Installation
- Blower Disassembly And Assembly
- Gearbox Parts Identification
- Gearbox Disassembly
- Gearbox Assembly
- Gearbox Checking Backlash
- ENGINE COMPONENTS AND TESTING
- Compression Checking
- Glow Plugs Checking
- Glow Plugs Removal And Installation
- Fuel Shut-Off Solenoid, Checking
- Fuel Shut-Off Solenoid, Adjusting
- Fuel Shut-Off Solenoid Removal And Installation
- Checking
- Fuel Injection Pump Removal And Installation
- Timing The Injection Pump
- Fuel Injector Removal And Installation
- Fuel Injector Checking
- Fuel Injector Disassembly
- Fuel Injector Assembly
- Valve Clearance Adjustment
- Rocker Arm And Shaft Checking
- Valve Timing, Checking
- ENGINE
- Removal And Installation
- Engine Mount Replacement
- FLYWHEEL AND HOUSING
- Flywheel Removal And Installation
- Ring Gear Removal And Installation
- Housing Removal And Installation
- RECONDITIONING THE ENGINE-KUBOTA V2203-EB AND V2003T-EB (TURBO)
- Cylinder Head Removal And Installation
- Cylinder Head Disassembly And Assembly
- Cylinder Head Servicing
- Cylinder Head Top Clearance
- Checking The Valve Guide
- Reconditioning The Valve And Valve Seat
- Valve Spring
- Rocker Arm And Shaft Checking
- Timing Gearcase Cover Removal And Installation
- Idler Gear And Camshaft Removal And Installation
- Servicing The Camshaft
- Servicing The Idle Gear And Shaft
- Timing Gears Checking Backlash
- Fuel Camshaft Removal And Installation
- Fuel Camshaft Governor
- Crankshaft Gear Removal And Installation
- Oil Pump Removal And Installation
- Oil Pump Service
- Checking Engine Oil Pressure
- Relief Valve
- Piston And Connecting Rod Removal And Installation
- Servicing The Piston And Connecting Rod
- Connecting Rod Alignment
- Crankshaft And Bearings Removal And Installation
- Servicing The Crankshaft And Bearings
- Checking The Cylinder Bore
- Water Pump Disassembly And Assembly
- TURBOCHARGER
- Troubleshooting
- Description
- Removal and Installation
- 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
- 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 (773)
- Loader Dimensions
- Performance
- Controls
- Engine
- Hydraulic System
- Electrical
- Drive System
- Capacities
- Tires
- ENGINE SPECIFICATIONS – KUBOTA V2203-EB
- Fuel Injection Nozzles
- Fuel Injection Pump
- Cylinder Head
- Valves
- Valve Springs
- Valve Timing
- Rocker Arms
- Camshaft
- Tappet
- Cylinders
- Piston Rings
- Pistons
- Connecting Rod
- Oil Pump
- Crankshaft
- Timing Gear
- Thermostat
- Crankshaft Re-Grind Data
- ENGINE SPECIFICATIONS – KUBOTA V2003T-EB (TURBO)
- Fuel Injection Nozzles
- Fuel Injection Pump
- Cylinder Head
- Valves
- Valve Springs
- Valve Timing
- Rocker Arms
- Camshaft
- Tappet
- Cylinder Liner
- Piston Rings
- Pistons
- Connecting Rod
- Oil Pump
- Crankshaft
- Timing Gear
- Thermostat
- Crankshaft Re-Grind Data
- TORQUE SPECIFICATIONS FOR BOLTS
- Torque For General SAE Bolts
- Torque For General Metric 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/HYDROSTATIC FLUID SPECIFICATIONS
- SMR
- Revision No: 773/773H-1
- Revision No: 773/773H-2
- Revision No: 773/773H-3
- Revision No: 773/773H-4
- Revision No: 773/773H-5
- Revision No: 773-6
- Revision No: 773-7
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