These service manual contains all the information required to assist you or a trained service engineers with all work, repairs and maintenance on this Excavator.

Language English

425 & 425: S/N A1HW11001 & Above
425 & 425: S/N A52011001 & Above
Service Manual
Operation & Maintenance Manual

425: S/N AACJ11001 & Above
425: S/N A9K311001 & Above
428: S/N A9K411001 & Above
Service Manual
Operation & Maintenance Manual

Table of Content

FOREWORD
SAFETY INSTRUCTIONS
FIRE PREVENTION
SERIAL NUMBER LOCATIONS
DELIVERY REPORT
BOBCAT EXCAVATOR IDENTIFICATION
SAFETY AND MAINTENANCE
- ALTERNATOR BELT
- AIR CLEANER
- CONTROL CONSOLE LOCKOUTS
- COOLING SYSTEM
- ENGINE LUBRICATION SYSTEM
- EXCAVATOR STORAGE AND RETURN TO SERVICE
- FOLD-DOWN TOPS
- FUEL SYSTEM
- HYDRAULIC SYSTEM
- LIFTING AND BLOCKING THE EXCAVATOR
- LIFTING THE EXCAVATOR
- LUBRICATION OF THE HYDRAULIC EXCAVATOR
- MOTION ALARM (IF EQUIPPED)
- SEAT BELT
- SERVICE SCHEDULE
- SPARK ARRESTER MUFFLER
- STOPPING THE ENGINE AND LEAVING THE EXCAVATOR
- TAILGATE
- TRANSPORTING THE EXCAVATOR ON A TRAILER
- TRAVEL MOTOR
- UPPERSTRUCTURE SLEW LOCK
HYDRAULIC SYSTEM
- ARM CYLINDER
- BLADE CYLINDER
- BLADE / TRACK EXPAND VALVE
- BOOM CYLINDER
- BOOM SWING CYLINDER
- BUCKET CYLINDER
- BUILD-UP VALVE
- CONTROL PATTERN SELECTOR VALVE
- HYDRAULIC CONTROL VALVE
- HYDRAULIC PUMP
- HYDRAULIC RESERVOIR
- HYDRAULIC SYSTEM INFORMATION
- LEFT CONTROL LEVER (JOYSTICK)
- MAIN RELIEF VALVE
- MANIFOLD ASSEMBLY / ACCUMULATOR
- OIL COOLER (IF EQUIPPED)
- PORT RELIEF VALVES
- PRESSURE REDUCING VALVE
- RIGHT CONTROL LEVER (JOYSTICK)
- SLEW MOTOR
- SWIVEL JOINT
- TRACK FRAME EXPANSION CYLINDER
- TRAVEL MOTOR
- TWO SPEED CONTROL VALVE
UNDERCARRIAGE
- BLADE
- SWING CIRCLE GEAR
- TRACK DAMAGE IDENTIFICATION
- TRACK FRAME
- TRACK IDLER
- TRACK ROLLER
- TRACKS
UPPERSTRUCTURE AND SWING SECTION
- ARM
- BLADE CONTROL
- BOOM
- BUCKET
- COUNTER WEIGHTS
- ENGINE SPEED CONTROL
- FLOOR PANELS
- FUEL TANK
- HORN
- INSTRUMENT PANEL
- LEFT CONSOLE
- LEFT PEDAL
- RIGHT CONSOLE
- RIGHT PEDAL
- SEAT
- SIDE COVERS
- SWING FRAME
- TAILGATE
- TOPS
- TRAVEL CONTROLS
- UPPERSTRUCTURE
- UPPERSTRUCTURE SLEW LOCK
ELECTRICAL SYSTEM AND ANALYSIS
- ALTERNATOR
- BATTERY
- ELECTRICAL SYSTEM INFORMATION
- FUEL LEVEL SENDER
- LIGHTS
- MICROSWITCH
- STARTER
ENGINE SERVICE
- AIR CLEANER
- ENGINE
- ENGINE COMPONENTS AND TESTING
- FLYWHEEL AND HOUSING
- RADIATOR
- RECONDITIONING THE ENGINE
- SPARK ARRESTOR MUFFLER
- TROUBLESHOOTING
SPECIFICATIONS
- CONVERSIONS
- ENGINE SPECIFICATIONS
- HYDRAULIC CONNECTION SPECIFICATIONS
- HYDRAULIC FLUID SPECIFICATIONS
- SPECIFICATIONS 425 EXCAVATOR
- TORQUE SPECIFICATIONS FOR BOLTS

Bobcat 425 and 428 service manual instructions are necessary before operating or servicing machine. Read and understand the Operation & Maintenance Manual, Operator s Handbook and signs (decals) on machine. Follow warnings and instructions in the manuals when making repairs, adjustments or servicing. Check for correct function after adjustments, repairs or service. Untrained operators and failure to follow instructions can cause injury or death.

These manual is for the Bobcat 425 and 428 Excavator. It provides necessary servicing and adjustment procedures for the Bobcat 425 and 428 Excavator and its component parts and systems. Refer to the Operation & Maintenance Manual and service manual for operating instructions, repair, starting procedure, daily checks, etc.