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Bobcat 328 Excavator Service Manual (SN 234211001-234299999)

Format: PDF (Printable Document)

File Language: English

File Pages: 830

File Size: 23.89 MB (Speed Download Link)

Brand: Bobcat

Model: 328 Excavator

Book No: 6902745

Serial No: SN 234211001-234299999

Type of Document: Service Manual

Categories: ,

$ 45

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Bobcat 328 Excavator Service Manual (SN 234211001-234299999)

A Bobcat 328 is a small excavator you haul to tight jobs for trenching, footings, and utility work. The service manual is what you grab when the machine is down, you've got oil on the floor, and you need the right procedure instead of guessing. Around my shop, I reach for this kind of book when I'm chasing a hydraulic issue, doing engine work, or sorting out wiring so the machine gets back on a trailer and back earning money.

What this manual helps you do

  • Diagnose hydraulic problems, trace hoses, and check pressures on the 328's implement and travel circuits
  • Follow step-by-step teardown and reassembly for the engine, pumps, and drive motors specific to the 328
  • Troubleshoot electrical faults using wiring diagrams, connector callouts, and test procedures
  • Adjust and verify track drive, swing, and boom/arm functions after repairs so the machine runs straight and smooth
  • Replace seals, bushings, and wear parts in cylinders and linkages with the right sequences and specs

Who this is for

If your 328 excavator serial number falls between 234211001 and 234299999, this is the shop manual you want. It's for small contractors, field techs, rental fleets, and owner-operators doing real repair work. If you just need basic controls, daily checks, or safety info, you want the operator's handbook instead, not this manual.

FAQ

Q: Is this a searchable PDF, and can I read the wiring diagrams on a laptop or tablet?

A: Yes, it's a PDF you can search by keyword, and the wiring diagrams are clear enough to zoom in on pins and wire colors.

Q: My 328 serial number is outside 234211001-234299999. Will this still match my machine?

A: No, you'll want the service manual that matches your exact serial range so the procedures and wiring stay accurate.

Q: I'm just doing maintenance like fluids and filters. Is this the right document?

A: For simple maintenance, the operator's handbook is usually enough. This service manual makes sense if you're doing real diagnostics or tear-downs.

Bottom line: If you own a Bobcat 328 in the 234211001-234299999 range and you actually turn wrenches on it, this is the right manual. If your serial doesn't match, skip it and get the correct book.

📘 Show Index

Table of Contents:

  • MAINTENANCE SAFETY
  • ALPHABETICAL INDEX
  • CONTENTS
    • FOREWORD
    • SAFETY INSTRUCTIONS
    • FIRE PREVENTION
      • Maintenance
      • Operation
      • Electrical
      • Hydraulic System
      • Fueling
      • Starting
      • Spark Arrestor Exhaust System
      • Welding And Grinding
      • Fire Extinguishers
    • SERIAL NUMBER LOCATIONS
      • Excavator Serial Number
      • Engine Serial Number
    • DELIVERY REPORT
    • BOBCAT EXCAVATOR IDENTIFICATION
  • SAFETY AND MAINTENANCE
    • LIFTING AND BLOCKING THE EXCAVATOR
      • Procedure
    • UPPERSTRUCTURE SLEW LOCK
      • Operation (Early Models)
      • Operation (Later Models)
    • LIFTING THE EXCAVATOR
      • Procedure
    • OPERATOR CAB (ROPS/TOPS)
      • Emergency Exit
      • Front Window
      • Right Side Windows
      • Cab Door
    • TRANSPORTING THE EXCAVATOR
      • Procedure
    • TAILGATE
      • Opening And Closing The Tailgate
      • Adjusting The Bumper
      • Adjusting The Latch
    • RIGHT SIDE COVER
      • Opening And Closing The Right Side Cover
    • SERVICE SCHEDULE
      • Chart
    • AIR CLEANER
      • Daily Check
      • Replacing The Filters
    • HEATER AIR FILTER (WITH CAB OPTION ONLY)
      • Removal And Installation
    • 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
      • Draining The Fuel Tank
      • Fuel Filter
      • 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
      • Replacing The Hydraulic Oil
      • Replacing The Hydraulic Filter
      • Replacing The Case Drain Filter
      • Diagnostic Couplers
    • LUBRICATION OF THE HYDRAULIC EXCAVATOR
    • TRAVEL MOTOR
      • Checking Oil Level
      • Draining The Travel Motor
    • SPARK ARRESTOR MUFFLER
    • ENGINE ACCESSORY DRIVE BELT
      • Belt Tension
      • Belt Adjustment
    • SEAT BELT
      • Inspection And Maintenance
  • HYDRAULIC SYSTEM
    • HYDRAULIC / HYDROSTATIC SCHEMATIC
    • HYDRAULIC SYSTEM INFORMATION
      • Glossary Of Hydraulic/Hydrostatic Symbols For Excavators
      • Troubleshooting Chart
      • 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
    • CLAMP CYLINDER
      • Testing
      • Removal And Installation
      • Parts Identification
      • Disassembly
      • Assembly
    • MAIN RELIEF VALVES
      • Testing And Adjusting The Main Relief Valves
    • PORT RELIEF VALVES
      • Testing And Adjusting The Port Relief Valves
    • CROSSPORT RELIEF VALVES
      • Testing And Adjusting The Crossport Relief Valves
    • PRESSURE REDUCING VALVE
      • Testing And Adjusting The Pressure Reducing Valve
    • HYDRAULIC CONTROL VALVE
      • Description
      • Removal And Installation
      • Control Valve Identification
      • Disassembly
      • Right Travel Valve Section Disassembly And Assembly
      • Boom Swing Valve Section Disassembly And Assembly
      • Boom Valve Section Disassembly And Assembly
      • Left Travel Valve Section Disassembly And Assembly
      • Arm Valve Section Disassembly And Assembly
      • Bucket Valve Section Disassembly And Assembly
      • Auxiliary Valve Section Disassembly And Assembly
      • Boost Valve Section Disassembly And Assembly
      • Blade Valve Section Disassembly And Assembly
      • Slew Valve Section Disassembly And Assembly
      • Assembly
    • HYDRAULIC PUMP (S/N 234111001-23412473) & (S/N 234211001-234212268)
      • Description
      • Torque Adjustment
      • Testing The Piston Pump
      • Testing The Gear Pump
      • Testing Auxiliary Hydraulic Flow
      • Removal And Installation
      • Coupler Removal And Installation
      • Hydraulic Pump Start Up
      • Gear Pump Parts Identification
      • Piston Pump Parts Identification
      • Disassembly
      • Gear Pump Disassembly
      • Gear Pump Assembly
      • Piston Pump Disassembly
      • Piston Pump Assembly
      • Assembly
    • HYDRAULIC PUMP (S/N 234112474 & Above) & (S/N 234212269 & Above)
      • Description
      • Torque Adjustment
      • Testing The Piston Pump
      • Testing The Gear Pump
      • Testing Auxiliary Hydraulic Flow
      • Removal And Installation
      • Coupler Removal And Installation
      • Hydraulic Pump Start Up
      • Gear Pump Parts Identification
      • Piston Pump Parts Identification
      • Disassembly
      • Gear Pump Disassembly
      • Gear Pump Assembly
      • Piston Pump Disassembly
      • Piston Pump Assembly
    • MANIFOLD ASSEMBLY/ ACCUMULATOR
      • Description
      • Removal And Installation
      • Parts Identification
      • Disassembly
      • Assembly
    • MANIFOLD ASSEMBLY
      • Parts Identification
      • Disassembly
      • Assembly
    • TRAVEL MOTOR
      • Removal And Installation
      • Parts Identification
      • Disassembly
      • Assembly
    • SWIVEL JOINT
      • Description
      • Removal And Installation
      • Parts Identification
      • Disassembly
      • Assembly
    • SWING MOTOR
      • Removal And Installation
      • Parts Identification
      • Disassembly
      • Assembly
    • SWING MOTOR DRIVE CARRIER
      • Removal And Installation
      • Parts Identification
      • Disassembly
      • Assembly
    • CONTROL PATTERN SELECTOR VALVE
      • Removal And Installation
      • Parts Identification
      • Disassembly
      • Assembly
    • RIGHT CONTROL LEVER (JOYSTICK)
      • Testing
      • Handle Removal And Installation
      • Joystick Assembly, Removal And Installation
      • Parts Identification
      • Disassembly
      • Assembly
    • LEFT CONTROL LEVER (JOYSTICK)
      • Testing
      • Handle Removal And Installation
      • Joystick Assembly Removal And Installation
      • Parts Identification
      • Disassembly
      • Assembly
    • HYDRAULIC FILTER MOUNT
      • Removal And Installation
    • HYDRAULIC RESERVOIR
      • Removal And Installation
    • OIL COOLER
      • Removal And Installation
    • DIRECT TO TANK VALVE
      • Removal And Installation
      • Disassembly And Assembly
    • BUILD UP VALVE
      • Description
      • Removal And Installation
      • Parts Identification
      • Disassembly And Assembly
    • CASE DRAIN FILTER
      • Removal And Installation
  • UNDERCARRIAGE
    • BLADE
      • Removal And Installation
    • TRACKS
      • Track Lug Height
      • Adjustment
      • Rubber Track Removal And Installation
      • Steel Track Removal And Installation
    • TRACK FRAME
      • Disassembly And Assembly
      • Recoil Spring Cylinder Disassembly And Assembly
      • Recoil Spring Cylinder Parts Identification (with Replaceable Shaft)
      • Recoil Spring Assembly And Cylinder Disassembly And Assembly (With Replaceable Shaft)
    • TRACK DAMAGE IDENTIFICATION
      • Cutting Of Steel Cords
      • 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 Track Roller Side
    • TRACK IDLER
      • Parts Identification
      • Disassembly
      • Assembly
    • TRACK ROLLER
      • Parts Identification
      • Disassembly
      • Assembly
    • SWING CIRCLE GEAR
      • Swing Bearing Removal
      • Swing Bearing Installation
  • UPPERSTRUCTURE & SWING SECTION
    • UPPERSTRUCTURE
      • Removal
      • Installation
    • ROPS CANOPY
      • Removal And Installation
    • 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
      • Right Side Front And Rear Sliding Window Weather Strip Removal And Installation
      • Right Side Front And Rear Sliding Window Wiper Strip Removal And Installation
      • Glass Removal
      • Glass Installation
    • STANDARD SEAT AND SEAT MOUNT
      • Removal And Installation
    • SUSPENSION SEAT AND SEAT MOUNT
      • Removal And Installation
    • RIGHT CONSOLE
      • Console Cover Removal And Installation
      • Console Base Removal And Installation
    • LEFT CONSOLE
      • Lower Console Cover Removal And Installation
      • Upper Console Cover Removal And Installation
      • Compression Spring Removal And Installation
      • Compression Spring Disassembly And Assembly
      • Lock Lever Removal And Installation
      • Console Removal And Installation
      • Disassembly And Assembly
      • Console Switch Removal And Installation
      • Console Base Removal And Installation
    • ENGINE SPEED CONTROL
      • Removal And Installation
      • Adjustment (Later Models)
    • BLADE CONTROL
      • Lever Removal And Installation
      • Linkage Removal And Installation
      • Linkage Bar Removal And Installation
      • Lower Linkage Removal And Installation
    • RIGHT PEDAL AND LINKAGE
      • Pedal Removal And Installation
      • Pedal Disassembly And Assembly
      • Linkage Removal And Installation
    • TRAVEL CONTROLS
      • Removal And Installation
      • Disassembly And Assembly
      • Adjustment
    • FLOOR MAT AND FLOOR PLATE
      • Removal And Installation (Canopy Equipped Excavators)
      • Removal And Installation (Cab Equipped Excavators)
    • FUEL TANK
      • Removal And Installation
    • HORN
      • Removal And Installation (Early Models)
      • Removal And Installation (Later Models)
    • SWING FRAME
      • Boom Swing Bracket Removal And Installation
      • Boom Swing Bracket Hose Installation
      • Bushing Removal
      • Bushing Installation
    • BOOM
      • 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
      • Bucket Teeth Removal And Installation
      • Bucket Side Cutting Edge Removal And Installation
    • CLAMP
      • Removal And Installation
    • TAILGATE
      • Removal And Installation
      • Latch Removal And Installation
    • X-CHANGE
      • Removal And Installation
      • Disassembly
      • Assembly
      • Check Proper Latch Engagement
    • UPPERSTRUCTURE SLEW LOCK
      • Removal And Installation (Early Models)
      • Removal And Installation (Later Models)
      • Disassembly And Assembly (Later Models)
    • RIGHT SIDE COVER
      • Removal And Installation
  • ELECTRICAL SYSTEM AND ANALYSIS
    • ELECTRICAL SCHEMATIC
    • ELECTRICAL SYSTEM INFORMATION
      • Troubleshooting Chart
      • Description
      • Fuse And Relay Location
    • BATTERY
      • Servicing
      • Removing And Installing The Battery
      • Using A Booster Battery (Jump Starting)
    • ALTERNATOR
      • Engine Accessory Drive Belt
      • Engine Accessory Drive Belt Tensioner Removal And Installation
      • Removal And Installation
      • Bracket Removal And Installation
      • Description
      • Tests
      • Alternator Output Test
      • Full Field Test
      • Alternator Regulator Test
      • Parts Identification
      • Disassembly And Assembly
      • Rotor Continuity Test
      • Rotor Continuity Test
      • Rectifier Continuity (Diode) Test
    • STARTER
      • Removal And Installation
      • Parts Identification
      • Disassembly
      • Inspection And Repair
      • Assembly
    • LIGHTS
      • Removal And Installation
      • Boom Light Removal And Installation (Early Models)
      • Boom Light Disassembly And Assembly (Early Models)
      • Boom Light Removal And Installation (Later Models)
      • Boom Light Bulb Replacement (Later Models)
    • TWO SPEED SWITCH
      • Removal And Installation
    • FUEL LEVEL SENDER
      • Removal And Installation
      • Testing
    • DIAGNOSTICS SERVICE CODE
      • Number Codes List
    • DELUXE INSTRUMENT PANEL SETUP
      • Passwords
      • Password Entry (For Starting And Operating The Machine)
      • Changing The Owner or Operator Password
      • Password Lockout Feature
      • Job Clock
      • RPM
  • ENGINE SERVICE
    • TROUBLESHOOTING
      • Chart
    • MUFFLER
      • Removal And Installation
    • AIR CLEANER
      • Removal And Installation
    • RADIATOR
      • Removal And Installation
    • ENGINE COMPONENTS AND TESTING
      • Engine Compression Checking
      • Glow Plugs Removal And Installation
      • Checking The Glow Plug
      • Fuel Shut-Off Solenoid Removal And Installation
      • Fuel Injection Pump Check
      • Fuel Injection Pump Removal And Installation
      • Fuel Injection Pump Timing
      • Fuel Injector Nozzles Removal And Installation
      • Fuel Injector Nozzle Check
      • Valve Clearance Adjustment
    • ENGINE
      • Removal And Installation
    • ENGINE FLYWHEEL (EARLY MODELS)
      • Flywheel Removal And Installation
      • Hydraulic Pump Coupler
      • Flywheel Ring Gear
    • ENGINE FLYWHEEL (LATER MODELS)
      • Flywheel Removal And Installation
      • Hydraulic Pump Coupler
      • 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
      • 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
      • Camshaft Servicing
      • 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
      • Checking Engine Oil Pressure
      • Valve Tappets
      • 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
    • HEATER SYSTEM
      • Description
      • Components
    • REGULAR MAINTENANCE
      • Filter Element Removal And Installation
      • Heater Coil
    • TROUBLESHOOTING
      • Blower Motor Does Not Operate
      • Blower Motor Operates Normally, But Air Flow Is Insufficient
      • Electrical System
    • HEATER UNIT (EARLY MODELS)
      • Removal And Installation
    • HEATER UNIT (LATER MODELS)
      • Removal And Installation
    • HEATER COIL (EARLY MODELS)
      • Removal And Installation
    • HEATER COIL (LATER MODELS)
      • Removal And Installation
    • BLOWER FAN (EARLY MODELS)
      • Removal And Installation
      • Disassembly And Assembly
      • Resistor Removal And Installation
      • Wire Connector Removal And Installation
    • BLOWER FAN (LATER MODELS)
      • Removal And Installation
      • Disassembly And Assembly
      • Resistor Removal And Installation
    • HEATER VALVE (EARLY MODELS)
      • Removal And Installation
    • HEATER VALVE (LATER MODELS)
      • Removal And Installation
  • SPECIFICATIONS
    • SPECIFICATIONS
      • 325/328 Excavator Machine Dimensions
      • 325 Excavator Machine Dimensions
      • 328 Excavator Machine Dimensions
      • Performance
      • Controls
      • Engine
      • Hydraulic System
      • Hydraulic Cylinders
      • Hydraulic Cycle Times
      • Drive System
      • Undercarriage
      • Track
      • Electrical
    • ENGINE SPECIFICATIONS
      • Fuel Injection Nozzles
      • Fuel Injection Pump
      • Cylinder Head
      • Valves
      • Valve Springs
      • Valve Timing
      • Rocker Arms
      • Camshaft
      • Tappet
      • Cylinders
      • Piston Rings
      • Pistons
      • Connecting Rods
      • Oil Pump
      • Crankshaft
      • Timing Gear
      • 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
      • Specifications
    • FUEL, COOLANT AND LUBRICANTS
      • Chart
    • CONVERSIONS
      • Decimal And Millimeter Equivalents
      • U.S. To Metric Conversion
  • SERVICE MANUAL REVISIONS
    • Revision No: 325/328-1
    • Revision No: 325/328-2
    • Revision No: 325/328-3
    • Revision No: 325/328-4
    • Revision No: 325/328-5
    • Revision No: 325/328-6
    • Revision No: 325/328-7
    • Revision No: 325/328-8
    • Revision No: 325/328-9

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