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Bobcat 231 Excavator Service Manual (SN 508912001-508999999)

Format: PDF (Printable Document)

File Language: English

File Pages: 340

File Size: 14.43 MB (Speed Download Link)

Brand: Bobcat

Model: 231 Excavator

Book No: 6722178

Serial No: SN 508912001-508999999

Type of Document: Service Manual

Categories: ,

$ 45

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Bobcat 231 Excavator Service Manual (SN 508912001-508999999)

A Bobcat 231 is a handy little excavator for trenching water lines, cleaning ditches, and all the ugly jobs around a farm or small jobsite. When something quits swinging, tracking, or digging right, this is when I reach for the service manual, not the operator's book. You want it when you're chasing a hydraulic issue, sorting out wiring, or trying to put something back together the way the factory intended.

What this manual helps you do

  • Diagnose no-start, hard-start, or low-power problems on the small diesel engine
  • Trace and troubleshoot hydraulic issues in the boom, arm, bucket, and travel circuits
  • Check and set hydrostatic and hydraulic pressures using the correct test ports and procedures
  • Follow teardown and reassembly steps for cylinders, valves, and drive motors
  • Verify and repair electrical and wiring problems, including reading the factory diagrams

Who this is for

This is the right manual if you own or work on a Bobcat 231 excavator in the serial range 508912001 to 508999999 and you actually turn wrenches, whether you're a small contractor, farm owner, or shop mechanic. If you just need basic controls, daily checks, or safety info, 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: Yes, service manuals like this are usually in searchable PDF format and the wiring diagrams are readable if you can zoom in.

Q: My 231 has a different serial number. Will this still match my machine?

A: No, this one is written for 231 machines in the 508912001-508999999 range. If yours is outside that, you should look for the correct manual.

Q: I'm just doing routine maintenance and fluid changes. Is this the right book?

A: It will work, but it's overkill. For simple maintenance only, the operator's manual is easier to use.

Bottom line: If your 231 falls in that serial range and you're doing real repairs, this is the manual you want. If the serials don't match, skip it.

📘 Show Index

Table of Contents:

  • CONTENTS
    • FOREWORD
    • SAFETY
    • SAFETY INSTRUCTIONS
    • SERIAL NUMBER LOCATIONS
    • HYDRAULIC EXCAVATOR SERIAL NUMBER
    • ENGINE SERIAL NUMBER
    • DELIVERY REPORT
    • HYDRAULIC EXCAVATOR IDENTIFICATION
    • MACHINE SIGNS TRANSLATIONS (DECALS)
  • PREVENTIVE MAINTENANCE
    • SERVICE SCHEDULE
    • ENGINE COVER
      • Procedure
    • AIR CLEANER SERVICE
      • Replacing the Filter Element
    • FUEL SYSTEM
      • Fuel Specifications
      • Fuel System Service
      • Fuel Filters
      • In–line Fuel Filter (If Equipped)
      • Removing Air From The Fuel System
    • ENGINE LUBRICATION SYSTEM
      • Checking The Engine Oil
      • Engine Oil and Filter Replacement
    • COOLING SYSTEM
      • Coolant Level
      • Coolant Replacement
    • HYDRAULIC SYSTEM
      • Checking and Adding Fluid
      • Replacement of the Hydraulic Filter
      • Hydraulic Reservoir
      • Diagnostic Couplers
    • USING A BOOSTER BATTERY (JUMP STARTING)
      • Procedure
    • LUBRICATION OF THE HYDRAULIC EXCAVATOR
      • Procedure
    • FINAL DRIVE CASE
      • Checking Oil Level
      • Draining Final Drive Case
    • HYDRAULIC SECTION
  • HYDRAULIC SECTION
    • HYDRAULIC SCHEMATICS
    • HYDRAULIC SERVICE INFORMATION
      • Description
    • MAIN RELIEF VALVES
      • Checking the Relief Valve Pressure Settings
      • Adjustment Procedure
      • (With Dual Pressure Relief Valves) (S/N 508912381 & Above)
    • HYDRAULIC PUMP FLOW TEST
    • HYDRAULIC PUMP
      • Removal And Installation
    • HYDRAULIC PUMP
      • Disassembly And Assembly
    • HYDRAULIC CONTROL VALVE (Six Spool)
      • Removal And Installation
      • Parts Identification
      • Disassembly And Assembly
    • HYDRAULIC CONTROL VALVE (Three Spool)
      • Removal And Installation
      • Parts Identification
      • Disassembly And Assembly
      • Pressure Build–up Valve Adjustment Procedure
    • PRESSURE REDUCING VALVE WITH ACCUMULATOR
      • Removal And Installation
      • Parts Identification
    • ACCUMULATOR/VALVE
      • Disassembly
      • Assembly
      • Setting The Safety Relief Valve
    • ACCUMULATOR
      • Charging
    • AUXILIARY SELECTOR VALVE
      • Removal And Installation
      • Disassembly And Assembly
    • TWO SPEED VALVE
      • Removal And Installation
      • Parts Identification
    • PORT BLOCK
      • Removal And Installation
    • OIL COOLER
      • Removal And Installation
    • HYDRAULIC RESERVOIR AND FUEL RESERVOIR
      • Removal And Installation
    • HYDRAULIC FILTER ASSEMBLY
      • Removal And Installation
    • BOOM CYLINDER
      • Removal And Installation
      • Parts Identification
    • ARM CYLINDER
      • Removal And Installation
      • Parts Identification
    • BUCKET CYLINDER
      • Removal And Installation
      • Parts Identification
    • BLADE CYLINDER
      • Removal And Installation
      • Parts Identification
    • BOOM SWING CYLINDER
      • Removal And Installation
      • Parts Identification
    • HYDRAULIC CYLINDER
      • Disassembly
      • Assembly
    • JOYSTICK CONTROL CHANGE
  • DRIVE SECTION
    • LEFT CONSOLE
      • Lockout Valve Removal and Installation
      • Cylinder Removal and Installation
      • Removal and Installation
    • LEFT JOYSTICK
      • Removal and Installation
      • Disassembly and Assembly
      • Parts Identification
    • RIGHT CONSOLE
      • Removal and Installation
    • RIGHT CONSOLE COVER
      • Removal and Installation
    • THROTTLE LEVER
      • Low Idle Adjustment
      • High Idle Adjustment
      • Removal and Installation
    • CONTROL CABLES
      • Throttle Cable
      • Blade Cable and Lever
    • FOOT PEDAL AND STEERING LEVERS
      • Removal and Installation
      • Bushing Removal and Installation
    • FINAL DRIVE
      • Removal and Installation
      • Parts Identification
    • TRAVEL MOTOR
      • Disassembly
      • Assembly
  • UPPER WORKS AND SWING SECTION
    • SWING MOTOR
      • Removal and Installation
      • Disassembly
      • Assembly
    • CROSS–OVER RELIEF VALVE
      • Disassembly
      • Assembly
    • SWING MOTOR
      • Parts Identification
    • SWING GEAR BOX ASSEMBLY (WITH OR WITHOUT BRAKES)
      • Disassembly
      • Assembly
    • UPPER WORKS AND SWING CIRCLE GEAR
      • Removal and Installation
      • Swing Bearing Removal
      • Swing Bearing Installation
    • CENTER SWIVEL JOINT
      • Removal And Installation (through upper access removal)
      • Removal And Installation (through bottom access cover)
      • Parts Identification
  • MAIN FRAME AND TRACKS
    • ENGINE COVER
      • Removal and Installation
    • SEAT AND MOUNTING FRAME
      • Removal and Installation
    • CENTER FLOOR PANEL
      • Removal and Installation
    • SWING MOTOR COVER
      • Removal and Installation
    • REAR FLOOR PANEL
      • Removal and Installation
    • INSPECTION COVER
      • Removal and Installation
    • TOOL BOX
      • Removal and Installation
    • BUCKET
      • Removal and Installation
    • ARM
      • Removal and Installation
    • BOOM
      • Removal and Installation
    • BOOM SWING BRACKET
      • Removal and Installation
    • WORK GROUP HOSE INSTALLATION
      • Hose Mounting and Dimensions
    • BLADE
      • Removal and Installation
    • TRACK
      • Track Tension Adjustment
      • Rubber Tracks
      • Steel Tracks
      • Removal and Installation (Rubber Track)
      • Removal and Installation (Steel Track)
    • TRACK FRAME
      • Disassembly and Assembly
    • TRACK IDLER
      • Parts Identification
      • Disassembly
      • Assembly
      • Disassembly and Assembly
    • TRACK ROLLER
      • Parts Identification
      • Disassembly
      • Assembly
    • ROPS
      • Removal and Installation
      • Front Window Removal
      • Side Window Removal
  • ELECTRICAL SYSTEM
    • ELECTRICAL CHARTS
    • TROUBLESHOOTING
    • ELECTRICAL SYSTEM
      • Description
      • Fuses
      • Electrical System Service
    • BATTERY
      • Checking the Battery
      • Removal and Installation
    • ALTERNATOR
      • Belt Adjustment
      • Removal And Installation
    • STARTER
      • Removal and Installation
      • Disassembly and Assembly
      • Cleaning and Inspection
    • FUEL LEVEL SENDER
      • Removal and Installation
      • Checking
    • INSTRUMENT PANEL
      • Removal And Installation
    • HOURMETER
      • Removal And Installation
    • WIPER MOTOR AND SWITCH
  • ENGINE SYSTEM
    • TROUBLESHOOTING
    • VALVE CLEARANCE
      • Adjustment
    • ENGINE COMPRESSION
      • Checking
    • FUEL SYSTEM
      • Fuel Filters
      • Fuel Filter Assembly
      • In–Line Fuel Filter (if equipped)
      • Removing Air From the Fuel System
    • FUEL SHUT–OFF SOLENOID
      • Adjustment
      • Removal and Installation
    • FUEL INJECTION PUMP
      • Checking the Injection Pump
      • Removal and Installation
      • Timing the Injection Pump
    • FUEL INJECTOR NOZZLES
      • Checking the Injector Nozzle
    • GLOW PLUGS
      • Removal and Installation
      • Checking the Glow Plug
    • RADIATOR
      • Removal and Installation
    • AIR CLEANER
      • Removal and Installation
    • MUFFLER
      • Removal and Installation
    • HEATER
      • Removal and Installation
    • ENGINE
      • Removal and Installation
    • ENGINE FLYWHEEL
      • Removal and Installation
      • Flywheel Ring Gear
    • CYLINDER HEAD
      • Removal
      • Disassembly
      • Servicing the Cylinder Head
      • Assembly
      • Installation
    • ENGINE REPAIR
      • Removing the Gearcase
      • Removing the Timing Gear, Camshaft and Oil Pump
      • Removing the Pistons and Crankshaft
      • Servicing the Timing Gear and Camshaft
      • Servicing the Connecting Rods and Pistons
      • Servicing the Crankshaft
      • Servicing the Cylinder Liners
      • Lubrication System
      • Oil Pump Service
      • Water Pump Service
    • ENGINE ASSEMBLY
      • Installing the Crankshaft
      • Installing the Pistons
      • Installing the Gearcase
  • TECHNICAL DATA
    • HYDRAULIC EXCAVATOR SPECIFICATIONS
      • Machine Dimensions
      • Lifting Capacity With Blade Off Ground (Model 231 with Canopy)
      • Lifting Capacity With Blade Off Ground (Model 231 with Cab)
      • Engine
      • Hydraulic System
      • Swing System
      • Hydraulic Cylinders
      • Drive System
      • Brakes
      • Undercarriage
      • Track
      • Capacities
      • Miscellaneous
      • Fuel Injection Nozzles
      • Fuel Injection Pump
      • Cylinder Head
      • Valves
      • Valve Springs
      • Rocker Arms
      • Camshaft
      • Cylinder
      • Piston Rings
      • Pistons
      • Crankshaft
      • Oil Pump
      • Engine Oil Specifications
    • ENGINE BOLT TORQUE
      • Re–Grinding The Crankshaft
    • FUEL, COOLANT AND LUBRICANTS
    • OIL SPECIFICATIONS
      • Description
  • SERVICE MANUAL REVISON
    • 231-1
    • 231-2
    • 231-3
    • 231-4
    • 231-5
    • 231-6
    • 231-7
    • 231-8

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