A 773 is a bread-and-butter skid-steer. Around my shop it loads trucks, runs augers, snow pushes, all of it. The service manual is what you grab when the machine is down and guessing will cost you a day's revenue. Field techs, small contractors, and owner-operators use this manual to chase hydraulic problems, electrical gremlins, and to put pumps, motors, and engines back together the right way.
What this manual helps you do
- Diagnose no-move or weak-drive complaints by checking hydrostatic and charge pressures and following the troubleshooting trees
- Trace electrical issues using wiring diagrams so you can track down bad switches, relays, or broken wires
- Follow step-by-step teardown and reassembly for drive motors, cylinders, and major hydraulic components
- Check and set linkages, controls, and safety interlocks so the Bob-Tach, foot/hand controls, and seat bar work correctly
- Replace and adjust engine, cooling, and fuel system parts with the right sequences and torque references
Who this is for
This manual is for a Bobcat 773 skid-steer owner with serial number in the 500K11001-500K99999 range who wants to do real repairs, not just basic maintenance. If you only need to learn controls, daily checks, or safety, you want the operator's handbook instead, not this shop 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 and read wire labels.
Q: How do I know if it fits my exact 773?
A: Check your serial plate. If your 773 serial number falls between 500K11001 and 500K99999, this is the right manual series.
Q: Is this the right document if I'm rebuilding or diagnosing, not just changing oil?
A: Yes, this is the workshop-level service manual, meant for diagnostics, teardown, and reassembly work.
Bottom line: If your 773's serial number is in that 500K range and you actually turn wrenches on it, this is the manual you want. If not, 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 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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