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Bobcat 76 Excavator Service Manual (SN 504812001-504899999)

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 504812001-504899999

Type of Document: Service Manual

Categories: ,

$ 45

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Bobcat 76 Excavator Service Manual (SN 504812001-504899999)

The Bobcat 76 is an older compact excavator that still earns its keep trenching, digging footings, and farm work. The people who reach for this service manual are the ones actually tearing into it: shop mechanics, field techs, and owners who are done guessing. They want wiring diagrams that are readable, hydraulic specs in one place, and step-by-step teardown so they don't wreck expensive parts. If that sounds like what you're trying to do, this is the type of book you're looking at.

What this manual helps you do

  • Diagnose hydraulic problems in the boom, arm, bucket, and swing circuits, then pressure-test and verify repairs
  • Trace and troubleshoot electrical and starting issues using wiring diagrams and connector callouts
  • Follow step sequences to remove, rebuild, and reinstall major components like pumps, motors, cylinders, and final drives
  • Check, adjust, and set things like travel tracking, control linkages, and pilot / main system pressures to factory spec ranges
  • Replace seals, bearings, and wear parts in a controlled order so you don't guess at shims, orientations, or torque patterns

Who this is for

This is for a small contractor, owner-operator, rental fleet, or independent shop that actually wrenches on a Bobcat 76, same way you'd use a Cat or Deere shop manual. If you only want basic controls, capacities, and daily checks, you want the operator's handbook instead, not this service manual.

FAQ

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

A: Yes, it's a PDF you can search by keyword, and the wiring and hydraulic schematics are clear enough to zoom in on and read connector labels.

Q: Does this cover my machine's serial number?

A: It covers Bobcat 76 Excavators in the 504812001 to 504899999 serial number range. If your plate falls outside that, this isn't the right one.

Q: Is this the right book if I'm doing real repairs, not just maintenance?

A: Yes, this is the workshop service manual, meant for diagnostics, teardown, and reassembly, not just fluid changes.

Bottom line: If your 76's serial number is in that range and you're doing real repair work, this is the right manual. If you only need how to run it, skip this and get the operator's book.

📘 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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