A Bobcat 320 is a small compact excavator you squeeze into backyards, tight barn lots, and between houses to trench, set lines, or clean up. The person who reaches for this manual is the one with the tools already on the truck, trying to fix a leak, a no-move condition, or an electrical fault without waiting a week for the dealer. They want factory procedures, torque specs, and test points so they can diagnose it right the first time and not waste a parts run.
What this manual helps you do
- Diagnose hydraulic problems by checking pressures, checking valve operation, and tracing weak or dead functions
- Troubleshoot no-start or poor-running issues on the small diesel, including fuel, air, and basic electrical checks
- Follow step-by-step teardown and reassembly for swing motors, drive motors, cylinders, and major hydraulic components
- Replace or adjust undercarriage and slew components in the tight spots on a 320 without guessing disassembly order
- Trace and repair wiring and control issues using factory-style schematics and connector callouts for this serial range
Who this is for
This manual is for anyone working on a Bobcat 320 excavator in serial range 224511001 to 224599999: small contractors, owner-operators, rental fleets, and shop or field mechanics. If you only need to learn controls, safety, or basic maintenance, you want the operator's handbook instead, not this service manual.
FAQ
Q: Is this a searchable PDF, and can I read the wiring diagrams on a laptop or tablet?
A: These manuals are usually scanned or native PDFs that you can zoom and search, so wiring diagrams are readable on a decent screen.
Q: How do I know if it fits my machine?
A: Check your serial plate. If your 320 excavator serial number falls between 224511001 and 224599999, this is the correct manual.
Q: Is this the right document if I'm rebuilding or doing serious diagnostics?
A: Yes. This is the workshop-level service manual, meant for real repair work, not a quick owner's booklet.
If your 320's serial number is in that range and you're actually turning wrenches on it, this is the manual you want. If it's not in that range, skip it.
📘 Show Index
Table of Contents:
- MAINTENANCE SAFETY
- ALPHABETICAL INDEX
- CONTENTS
- FOREWORD
- SAFETY INSTRUCTIONS
- SERIAL NUMBER LOCATIONS
- Excavator Serial Number
- Engine Serial Number
- DELIVERY REPORT
- BOBCAT EXCAVATOR IDENTIFICATION
- SAFETY AND MAINTENANCE
- LIFTING AND BLOCKING THE EXCAVATOR
- UPPERSTRUCTURE SLEW LOCK
- LIFTING THE EXCAVATOR
- OPERATOR CAB ROPS/TOPS (IF EQUIPPED)
- Emergency Exits
- Cab Door
- Front Window Wiper
- Window Washer Reservoir
- Front Window
- Right Side Windows
- TRANSPORTING THE EXCAVATOR
- TAILGATE
- Opening And Closing The Tailgate
- Adjusting The Bumper
- Adjusting The Tailgate Latch
- SERVICE SCHEDULE
- AIR CLEANER SERVICE
- Daily Check
- Replacing The Filters
- HEATER AIR FILTERS
- Recirculation Filter
- Fresh Air Filter
- ENGINE COOLING SYSTEM
- Cleaning The Cooling System
- Checking Coolant Level
- Replacing The Coolant
- FUEL SYSTEM
- Fuel Specifications
- Filling The Fuel Tank
- Removing Water From The Fuel Filter
- Replacing The Fuel Filter
- Draining The Fuel Tank
- Removing Air From The Fuel System
- ENGINE LUBRICATION SYSTEM
- Checking Engine Oil
- Oil Chart
- Replacing Oil And Filter
- HYDRAULIC SYSTEM
- Checking And Adding Hydraulic Oil
- Diagnostic Couplers
- Replacing The Hydraulic Filter
- Replacing Hydraulic Oil
- LUBRICATION OF THE HYDRAULIC EXCAVATOR
- TRAVEL MOTOR
- Checking Oil Level
- Draining The Travel Motor
- SPARK ARRESTOR MUFFLER
- ALTERNATOR BELT
- Adjusting The Alternator Belt
- SEAT BELT
- Inspection And Maintenance
- CONTROL CONSOLE LOCKOUTS
- Inspection And Maintenance
- HYDRAULIC SYSTEM
- HYDRAULIC/HYDROSTATIC SCHEMATICS
- HYDRAULIC SYSTEM INFORMATION
- Glossary Of Hydraulic/Hydrostatic Symbols For Excavators
- Troubleshooting The Hydraulic Circuit
- Troubleshooting The Cylinder Circuit
- Troubleshooting The Swing (Upperstructure Slew) Circuit
- Troubleshooting The Travel Circuit
- BOOM CYLINDER
- Testing
- Removal and Installation
- Parts Identification
- Disassembly
- Assembly
- ARM CYLINDER
- Testing
- Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- BOOM SWING CYLINDER
- Testing
- Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- BUCKET CYLINDER
- Testing
- Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- BLADE CYLINDER
- Testing
- Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- MAIN RELIEF VALVE
- Testing And Adjusting The Main Relief Valve
- PORT RELIEF VALVES
- Testing And Adjusting The Port Relief Valve Pressure
- CROSSPORT RELIEF VALVES
- Testing And Adjusting The Crossport Relief Valve
- PRESSURE REDUCING VALVE
- Testing And Adjusting The Pressure Reducing Valve
- HYDRAULIC CONTROL VALVE (320)
- Description
- Removal And Installation
- Parts Identification
- Disassembly
- Auxiliary Valve Section Disassembly And Assembly
- Blade Valve Section Disassembly And Assembly
- Slew Valve Section Disassembly And Assembly
- Left Travel Valve Section Disassembly And Assembly
- Boom Valve Section Disassembly And Assembly
- Bucket Valve Section Disassembly And Assembly
- Arm Valve Section Disassembly And Assembly
- Boom Swing Valve Section Disassembly And Assembly
- Right Travel Valve Section Disassembly And Assembly
- Assembly
- HYDRAULIC CONTROL VALVE (320L)
- Description
- Removal And Installation
- Parts Identification
- Disassembly
- Auxiliary Valve Section Disassembly And Assembly
- Blade Valve Section Disassembly And Assembly
- Slew Valve Section Disassembly And Assembly
- Left Travel Valve Section Disassembly And Assembly
- Boom Valve Section Disassembly And Assembly
- Bucket Valve Section Disassembly And Assembly
- Arm Valve Section Disassembly And Assembly
- Boom Swing Valve Section Disassembly And Assembly
- Right Travel Valve Section Disassembly And Assembly
- Assembly
- HYDRAULIC PUMP
- Testing The Hydraulic Pump
- Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- MANIFOLD ASSEMBLY/ACCUMULATOR
- Description
- Removal And Installation
- Parts Identification – 320
- Disassembly – 320
- Assembly – 320
- Parts Identification – 320L
- Disassembly – 320L
- Assembly – 320L
- TRAVEL MOTOR
- Removal and Installation
- Parts Identification
- Disassembly
- Assembly
- SWIVEL JOINT
- Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- SWING MOTOR
- Removal and Installation
- Parts Identification
- Disassembly
- Assembly
- RIGHT CONTROL LEVER (JOYSTICK)
- Testing
- Handle Removal And Installation
- Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- LEFT CONTROL LEVER (JOYSTICK)
- Testing
- Handle Removal And Installation
- Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- HYDRAULIC FILTER MOUNT
- HYDRAULIC RESERVOIR
- OIL COOLER
- UNDERCARRIAGE
- BLADE
- Extension Removal And Installation (320 Only)
- Blade Removal And Installation
- TRACKS
- Track Lug Height
- Track Tension Adjustment
- Removal And Installation
- TRACK FRAME
- Disassembly And Assembly
- Removal And Installation Of Track Frame
- TRACK DAMAGE IDENTIFICATION
- Cutting Of The Steel Cords
- Causes Of The Damage
- Abrasion Of Embedded Metals
- Separation Of Embedded Metals
- Separation Of Embedded Metals Due To Corrosion
- Cuts On The Lug Side Rubber
- Cracks On The Lug Side Rubber Due To Fatigue
- Lug Abrasion
- Cracks And Cuts On The Lug Side Rubber
- Abrasion Of The Track Roller Side
- Cuts On The Edges Of The Track Roller Side
- TRACK IDLER
- Parts Identification
- Disassembly
- Assembly
- TRACK ROLLER
- Parts Identification
- Disassembly
- Assembly
- SWING CIRCLE GEAR
- UPPERSTRUCTURE & SWING SECTION
- UPPERSTRUCTURE
- ROPS CANOPY
- CAB
- Removal And Installation
- Door Removal And Installation
- Front Window Removal And Installation
- Right Side Rear Sliding Window Removal And Installation
- Right Side Front Sliding Window Removal And Installation
- Glass Removal
- Glass Installation
- SEAT AND SEAT MOUNT
- RIGHT CONSOLE
- Console Cover Removal And Installation (Cab)
- Console Cover Removal And Installation (ROPS Canopy)
- Gas Spring Removal And Installation (ROPS Canopy)
- Lock Lever Removal And Installation (ROPS Canopy)
- Adjustment (ROPS Canopy Models)
- Latch Hook Removal And Installation (ROPS Canopy)
- Latch Hook Disassembly And Assembly (ROPS Canopy)
- Cab Models
- Upper Console Removal And Installation
- Console Base Removal And Installation
- LEFT CONSOLE
- Console Cover Removal And Installation
- Gas Spring Removal And Installation
- Lock Lever Removal And Installation
- Adjustment
- Latch Hook Removal And Installation
- Latch Hook Disassembly And Assembly
- Upper Console Removal And Installation
- Console Base Removal And Installation
- ENGINE SPEED CONTROL
- Removal And Installation
- Engine Speed Control Cable Removal And Installation
- BLADE CONTROL
- Removal and Installation
- Disassembly And Assembly
- SLEW LOCK
- RIGHT PEDAL AND LINKAGE
- Right Pedal Removal And Installation
- Disassembly And Assembly
- Linkage Removal And Installation
- Linkage Disassembly And Assembly
- TRAVEL CONTROLS
- Removal And Installation
- Disassembly And Assembly
- LEFT PEDAL
- Removal And Installation (320 Only)
- Disassembly And Assembly (320 Only)
- CONTROL LINKAGE ASSEMBLY (320)
- Removal And Installation
- Left Pedal Linkage Disassembly And Assembly
- Right Travel Control Linkage Disassembly And Assembly
- Left Travel Control Linkage Disassembly And Assembly
- Linkage Rod Removal And Installation
- Linkage Rod Adjustment
- CONTROL LINKAGE ASSEMBLY (320L)
- Removal And Installation
- Right Travel Control Linkage Disassembly And Assembly
- Left Travel Control Linkage Disassembly And Assembly
- Linkage Rod Removal And Installation
- Linkage Rod Adjustment
- FLOOR MAT AND FLOOR PANELS
- Removal And Installation (320 Only)
- Removal And Installation (320L Only)
- BLADE EXTENSION TRAY
- Removal And Installation (320 Only)
- FUEL TANK
- HORN
- Removal And Installation (Earlier Models)
- Removal And Installation (Later Models)
- SWING FRAME
- Removal And Installation
- Bushing Replacement
- Swing Frame Bushing Removal
- Swing Frame Bushing Installation
- Boom Pivot Bushing Removal And Installation
- BOOM
- Removal And Installation
- Boom Bushing Removal And Installation
- ARM
- Removal And Installation
- Arm To Boom Bushing Removal And Installation
- Arm To Bucket And Bucket Link Bushing Removal And Installation
- BUCKET
- TAILGATE
- Removal And Installation
- Latch Removal And Installation
- ELECTRICAL SYSTEM AND ANALYSIS
- ELECTRICAL SCHEMATICS
- ELECTRICAL SYSTEM
- Troubleshooting Chart
- Description
- Fuses
- Relays And Diodes
- BATTERY
- Servicing
- Removing And Installing The Battery
- Using A Booster Battery (Jump Starting)
- ALTERNATOR
- Description
- Tests
- Alternator Output Test
- Full Field Test
- Alternator Regulator Test
- Alternator Regulator Test With Voltmeter
- Removal And Installation
- Parts Identification
- Disassembly And Assembly
- STARTER
- Removal And Installation
- Parts Identification
- Disassembly And Assembly
- Cleaning And Inspection
- LIGHTS
- Upperstructure Light Removal And Installation
- Upperstructure Light Disassembly And Assembly
- Boom Light Removal And Installation (320 Only) (Earlier Models)
- Boom Light Disassembly and Assembly (320 Only) (Earlier Models)
- Boom Light Removal And Installation (320 Only) (Later Models)
- Boom Light Bulb Replacement (320 Only) (Later Models)
- Light Switch Removal And Installation
- MICROSWITCH
- Adjustment
- Testing
- Removal And Installation
- TWO-SPEED SWITCH (320 ONLY)
- FUEL LEVEL SENDER
- Removal And Installation
- Testing
- ENGINE SERVICE
- TROUBLESHOOTING
- SPARK ARRESTOR MUFFLER
- AIR CLEANER
- RADIATOR
- ENGINE COMPONENTS AND TESTING
- Valve Clearance Adjustment
- Engine Compression Checking
- Fuel Shut-Off Solenoid Removal And Installation
- Fuel Shut-Off Timer Removal And Installation
- Fuel Injection Pump Check
- Fuel Injection Pump Removal And Installation
- Fuel Injection Pump Timing
- Fuel Injector Removal And Installation
- Fuel Injector Checking
- Glow Plug Removal And Installation
- ENGINE
- ENGINE FLYWHEEL
- Removal And Installation
- Hydraulic Pump Coupler Removal And Installation
- Hydraulic Pump Coupler Disassembly And Assembly
- Flywheel Ring Gear
- RECONDITIONING THE ENGINE
- Cylinder Head Removal And Installation
- Cylinder Head Disassembly And Assembly
- Cylinder Head, Servicing
- Cylinder Head Top Clearance
- Valve Guide, Checking
- Valve And Valve Seat Reconditioning
- Valve Spring
- Rocker Arm And Shaft, Checking
- Timing Gearcase Cover Removal And Installation
- Idler Gear And Camshaft Removal And Installation
- Idler Gear and Shaft, Servicing
- 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
- Engine Oil Pressure, Checking
- Relief Valve
- Piston And Connecting Rod Removal And Installation
- Piston And Connecting Rod, Servicing
- Connecting Rod Alignment
- Crankshaft And Bearings Removal And Installation
- Crankshaft And Bearings, Servicing
- Cylinder Bore, Checking
- Water Pump Removal And Installation
- Water Pump Disassembly And Assembly
- HEATER
- SPECIFICATIONS
- SPECIFICATIONS
- 320/320L Excavator Machine Dimensions
- Performance
- Controls
- Engine
- Hydraulic System
- Hydraulic Cylinders
- Hydraulic Cycle Times
- Drive System
- Undercarriage
- Track
- Electrical
- ENGINE SPECIFICATIONS
- Engine
- Fuel Injector Nozzles
- Fuel Injection Pump
- Cylinder Head
- Valves
- Valve Springs
- Rocker Arms
- Camshaft
- Cylinders
- Piston Rings
- Pistons
- Connecting Rods
- Crankshaft
- Oil Pump
- Thermostat
- Engine Bolt Torque
- Crankshaft Re-Grind Data
- TORQUE SPECIFICATIONS
- 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 FLUID SPECIFICATIONS
- FUEL, COOLANT AND LUBRICANTS
- CONVERSIONS
- Decimal And Millimeter Equivalents
- U.S. To Metric Conversion
- SMR
- Revision No: 320-1
- Revision No: 320-2
- Revision No: 320-3
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