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Bobcat 76 Excavator Service Manual (SN 504811001-504811999)

Format: PDF (Printable Document)

File Language: English

File Pages: 258

File Size: 10.19 MB (Speed Download Link)

Brand: Bobcat

Model: 76 Excavator

Book No: 6570475

Serial No: SN 504811001-504811999

Type of Document: Service Manual

Categories: ,

$ 45

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Bobcat 76 Excavator Service Manual (SN 504811001-504811999)

The Bobcat 76 is an older compact excavator that still earns its keep trenching, loading trucks, and doing utility work in tight spots. Around my shop, this level of service manual comes out when a tech is chasing a hydraulic issue, rebuilding a component, or trying to get a dead machine back in the rental line. If your machine falls in the listed serial range, this is the workshop book you use to keep it working and to keep guesswork out of the job.

What this manual helps you do

  • Diagnose hydraulic problems, trace lines, and check pressures on the 76's excavator-class hydraulic system
  • Follow step-by-step teardown and reassembly on main components like cylinders, pumps, motors, and swing gear
  • Troubleshoot electrical issues using wiring diagrams, connector callouts, and test procedures
  • Set and verify adjustments on controls, travel system, and machine linkages after repairs
  • Replace major assemblies with the right removal/installation sequences and torque reference values

Who this is for

This manual is for shop mechanics, field techs, small contractors, rental fleets, and owner-operators running a Bobcat 76 within serial numbers 504811001 through 504811999. If you only need basic operating tips or daily checks, you want the operator's handbook instead, not this manual.

FAQ

Q: Is this a searchable PDF, and are the wiring diagrams readable?

A: These manuals are typically scanned or native PDFs that you can search, and the wiring diagrams are laid out so you can zoom in and read pin numbers and wire colors.

Q: How do I know if it covers my exact machine?

A: Check your Bobcat 76 serial plate. If it falls between 504811001 and 504811999, this is the correct service manual.

Q: Is this the right document if I'm planning engine or hydraulic rebuilds?

A: Yes, this is the workshop-level service manual that people use for full repairs, not just routine maintenance.

If your 76's serial number is in that range and you're doing real repair work, this is the manual you want. If it's outside that range, keep looking.

📘 Show Index

Table of Contents:

  • CONTENTS
  • SAFETY
    • GENERAL PRECAUTIONS
    • PREPARATIONS FOR WORK
    • PRECAUTIONS DURING WORK
  • FOREWORD
  • HOISTING INSTRUCTIONS
  • STANDARD TIGHTENING TORQUE
    • STANDARD TIGHTENING TORQUE OF BOLTS AND NUTS
    • TIGHTENING TORQUE OF SPLIT FLANGE BOLTS
    • TIGHTENING TORQUE FOR NUTS OF FLARED
  • COATING MATERIALS
  • WEIGHT TABLE
  • LIST OF LUBRICANT AND WATER
  • ENGINE STRUCTURE AND FUNCTION
    • ENGINE MOUNT AND PTO (Power Take-Off) 56
    • ENGINE MOUNT 76
    • PTO (Power Take Off) 76
    • RADIATOR 56
    • RADIATOR 56 (12001 & Above)
    • RADIATOR 76
    • RADIATOR 76 (12001 & Above)
    • FUEL TANK AND PIPING 56
    • FUEL TANK AND PIPING 76
    • FUEL CONTROL 56
    • FUEL CONTROL 76
  • ENGINE DISASSEMBLY AND ASSEMBLY
    • REMOVAL OF RADIATOR ASSEMBLY 56
    • INSTALLATION OF RADIATOR ASSEMBLY 56
    • REMOVAL OF ENGINE ASSEMBLY 56
    • INSTALLATION OF ENGINE ASSEMBLY 56
    • REMOVAL OF ENGINE ASSEMBLY 76
    • INSTALLATION OF ENGINE ASSEMBLY 76
  • POWER TRAIN STRUCTURE AND FUNCTION
    • POWER TRAIN 56
    • POWER TRAIN 56 (12001 & Above)
    • POWER TRAIN 76
    • POWER TRAIN 76 (12001 & Above)
    • SWING CIRCLE 56
    • SWING CIRCLE 56 (12001 & Above)
    • SWING CIRCLE 76
    • SWING CIRCLE 76 (12001 & Above)
  • POWER TRAIN DISASSEMBLY AND ASSEMBLY
    • REMOVAL OF SWING CIRCLE ASSEMBLY 56
    • INSTALLATION OF SWING CIRCLE ASSEMBLY 56
    • REMOVAL OF SWING CIRCLE ASSEMBLY 76
    • INSTALLATION OF SWING CIRCLE ASSEMBLY 76
  • POWER TRAIN MAINTENANCE STANDARD
    • SWING CIRCLE 56
    • SWING CIRCLE 56 (12001 & Above)
    • SWING CIRCLE 76
    • SWING CIRCLE 76 (12001 & Above)
  • UNDERCARRIAGE STRUCTURE AND FUNCTION
    • TRACK FRAME AND RECOIL SPRING 56
    • TRACK FRAME AND RECOIL SPRING 56 (12001 & Above)
    • TRACK FRAME AND RECOIL SPRING 76
    • TRACK FRAME AND RECOIL SPRING 76 (12001 & Above)
    • IDLER
    • TRACK ROLLER
      • 56
      • 76
    • TRACK SHOE 56
    • TRACK SHOE 76
  • UNDERCARRIAGE MAINTENANCE STANDARD
    • TRACK FRAME AND RECOIL SPRING 56
    • TRACK FRAME AND RECOIL SPRING 56 (12001 & Above)
    • TRACK FRAME AND RECOIL SPRING 76
    • TRACK FRAME AND RECOIL SPRING 76 (12001 & Above)
    • TRACK ROLLER 56
    • TRACK ROLLER 56 (12001 & Above)
    • TRACK ROLLER 76
    • TRACK ROLLER 76 (12001 & Above)
    • IDLER
    • IDLER 56 (12001 & Above)
    • IDLER 76 (12001 & Above)
    • TRACK SHOE 56
    • TRACK SHOE 56 (12001 & Above)
    • TRACK SHOE 76
    • TRACK SHOE 76 (12001 & Above)
  • HYDRAULIC SYSTEM STRUCTURE AND FUNCTION
    • HYDRAULIC PIPING 56
    • HYDRAULIC PIPING 56 (12001 & Above)
    • HYDRAULIC PIPING 76
    • HYDRAULIC PIPING 76 (12001 & Above)
    • HYDRAULIC DIAGRAM 56
    • HYDRAULIC DIAGRAM 76
    • HYDRAULIC CIRCUIT 56
    • HYDRAULIC CIRCUIT 56 (12001 & Above)
    • HYDRAULIC CIRCUIT 76
    • HYDRAULIC CIRCUIT 76 (12001 & Above)
    • HYDRAULIC TANK 56
    • HYDRAULIC TANK 56
    • HYDRAULIC TANK 56 (12001 & Above)
    • HYDRAULIC TANK 76
    • HYDRAULIC TANK 76 (12001 & Above)
    • HYDRAULC PUMP 56
    • HYDRAULIC PUMP 56 (12001 & Above)
    • HYDRAULIC PUMP 76
    • HYDRAULIC PUMP 76 (12001 & Above)
    • 8-SPOOL CONTROL VALVE 56
    • 8-SPOOL CONTROL VALVE 56 (12001 & Above)
    • 6-SPOOL CONTROL VALVE 76
    • 6-SPOOL CONTROL VALVE 76 (12001 & Above)
    • 2-SPOOL CONTROL VALVE 76
    • 2-SPOOL CONTROL VALVE 76 (12001 & Above)
    • 1-SPOOL CONTROL VALVE 56 (12001 & Above)
    • 1-SPOOL CONTROL VALVE 76 (12001 & Above)
    • CENTER SWIVEL JOINT 56
    • CENTER SWIVEL JOINT 76
    • SWING MOTOR 56
    • SWING MOTOR 56 (12001 & Above)
    • SWING MOTOR 76
    • SWING MOTOR 76 (12001 & Above)
    • TRAVEL MOTOR
      • 56 (12001 & Above)
      • 76 (12001 & Above)
    • BRAKE VALVE
      • 56 (12001 & Above)
      • 76 (12001 & Above)
    • HYDRAULIC MOTOR
    • TRAVEL MOTOR BRAKE VALVE
    • HYDRAULIC CYLINDER 56
    • HYDRAULIC CYLINDER 56 (12001 & Above)
    • HYDRAULIC CYLINDER 76
    • HYDRAULIC CYLINDER 76 (12001 & Above)
    • VALVE CONTROL 56
    • VALVE CONTROL 56 (12001 & Above)
    • VALVE CONTROL 76
    • VALVE CONTROL 76 (12001 & Above)
  • HYDRAULIC SYSTEM TESTING AND ADJUSTING
    • TABLE OF STANDARD AND PERMISSABLE SPECIFICATIONS
    • 56 HYDRAULIC PUMP
      • Checking the Output of the Hydraulic Pump
      • Checking the Output of the Hydraulic Pump at the Arm Cylinder
      • Adjusting the Main Relief Valve
      • Checking the Port Relief Pressure
    • 76 HYDRAULIC PUMP
      • Checking the Output of the Hydraulic Pump at the Boom Cylinder
      • Checking the Output of the Hydraulic Pump at the Arm Cylinder
      • Checking the Output of the Hydraulic Pump at the Blade Cylinder
      • Adjusting the Main Relief Valve
      • Checking the Port Relief Valve Pressure
  • HYDRAULIC SYSTEM DISASSEMBLY AND ASSEMBLY
    • REMOVAL OF 8-SPOOL CONTROL VALVE ASSEMBLY 56
    • INSTALLATION OF 8-SPOOL CONTROL VALVE ASSEMBLY 56
    • DISASSEMBLY OF 8-SPOOL CONTROL VALVE ASSEMBLY 56
    • ASSEMBLY OF 8-SPOOL CONTROL VALVE ASSEMBLY 56
    • REMOVAL OF TRAVEL MOTOR ASSEMBLY 56
    • INSTALLATION OF TRAVEL MOTOR ASSEMBLY 56
    • REMOVAL OF CENTER SWIVEL JOINT ASSEMBLY 56
    • INSTALLATION OF CENTER SWIVEL JOINT ASSEMBLY 56
    • DISASSEMBLY OF CENTER SWIVEL JOINT ASSEMBLY 56
    • ASSEMBLY OF CENTER SWIVEL JOINT ASSEMBLY 56
    • REMOVAL OF 6-SPOOL CONTROL VALVE ASSEMBLY 76
    • INSTALLATION OF 6-SPOOL CONTROL VALVE ASSEMBLY 76
    • REMOVAL OF 2-SPOOL CONTROL VALVE ASSEMBLY 76
    • INSTALLATION OF 2-SPOOL CONTROL VALVE ASSEMBLY 76
    • DISASSEMBLY OF CONTROL VALVE ASSEMBLY 76
    • ASSEMBLY OF CONTROL VALVE ASSEMBLY 76
    • REMOVAL OF TRAVEL MOTOR ASSEMBLY 76
    • INSTALLATION OF TRAVEL MOTOR ASSEMBLY 76
    • REMOVAL OF CENTER SWIVEL JOINT ASSEMBLY 76
    • INSTALLATION OF CENTER SWIVEL JOINT ASSEMBLY 76
    • DISASSEMBLY OF CENTER SWIVEL JOINT ASSEMBLY 76
    • ASSEMBLY OF CENTER SWIVEL JOINT ASSEMBLY 76
  • HYDRAULIC SYSTEM MAINTENANCE STANDARD
    • HYDRAULIC PUMP 56
    • HYDRAULIC PUMP 56 (12001 & Above)
    • HYDRAULIC PUMP 76
    • HYDRAULIC PUMP 76 (12001 & Above)
    • 8-SPOOL CONTROL VALVE 56
    • 8-SPOOL CONTROL VALVE 56 (12001 & Above)
    • 6-SPOOL CONTROL VALVE 76
    • 6-SPOOL CONTROL VALVE 76 (12001 & Above)
    • 2-SPOOL CONTROL VALVE 56
    • 2-SPOOL CONTROL VALVE 76 (12001 & Above)
    • 1-SPOOL CONTROL VALVE 56 (12001 & Above)
    • 1-SPOOL CONTROL VALVE 76 (12001 & Above)
    • TRAVEL MOTOR BRAKE VALVE
    • TRAVEL MOTOR BRAKE VALVE 56 (12001 & Above)
    • TRAVEL MOTOR BRAKE VALVE 76 (12001 & Above)
    • HYDRAULIC CYLINDER 56
    • HYDRAULIC CYLINDER 56 (12001 & Above)
    • HYDRAULIC CYLINDER 76 (12001 & Above)
  • WORK EQUIPMENT STRUCTURE AND FUNCTION
    • WORK EQUIPMENT
      • 56
      • 76
  • WORK EQUIPMENT MAINTENANCE STANDARD
    • WORK EQUIPMENT 56
    • WORK EQUIPMENT 56 (12001 & Above)
    • WORK EQUIPMENT 76
    • WORK EQUIPMENT 76 (12001 & Above)
  • ELECTRICAL SYSTEM STRUCTURE AND FUNCTION
    • ELECTRICAL WIRING DIAGRAM 56
    • ELECTRICAL WIRING DIAGRAM 76
    • ELECTRICAL WIRING DIAGRAM 76 (12001 & Above)
    • ELECTRICAL CIRCUIT DIAGRAM 56
    • ELECTRICAL CIRCUIT DIAGRAM 56 (12001 & Above)
    • ELECTRICAL CIRCUIT DIAGRAM 76
    • ELECTRICAL CIRCUIT DIAGRAM 76 (12001 & Above)
  • SERVICE MANUAL REVISION
    • 56/76-1
    • 56/76-2
    • 56/76-3

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