Overview
The Massey Ferguson 6712S, 6713S and 6714S Tractor Workshop Service Repair Manual provides detailed technical information for maintaining, diagnosing and repairing these Massey Ferguson 6700 S Series agricultural tractors. The workshop documentation covers tractor specifications, engine systems, Dyna-4 and Dyna-6 transmissions, PowerShuttle assemblies, rear axles, braking systems, power take-off equipment, four-wheel-drive components, hydraulic systems, electrical circuits and electronic controls. It also includes references to additional 6700 S Series configurations, including Dyna-VT transmission equipment.
Technical coverage includes AGCO Power four-cylinder engine and SCR emission system references, GBA25 gearbox servicing, transmission calibration, differential and final drive repairs, PTO clutch overhaul, DANA front axle components, Load Sensing and Open Center hydraulics, and hydraulic pump removal and refitting. Additional sections address CAN network testing, alternator and starter diagnostics, telemetry systems, air-conditioning maintenance, operator suspension equipment, component tightening torques and specialised workshop tools.
Important Information: The supplied workshop documentation covers multiple MF 6700 S Series models and configurations. References include Dyna-4, Dyna-6 and Dyna-VT transmissions, HA140 and GPA20 rear axle assemblies, DANA front axle variants, Load Sensing and Open Center hydraulic systems, and different PTO and braking arrangements. Some procedures relate to other models within the shared 6700 S Series documentation. Identify the tractor model, transmission and installed components before selecting the appropriate service instructions.
Table of Contents
Massey Ferguson 6712S, 6713S, 6714S Manual
- 01. Introduction, Specifications and Calibrations
- Using the Workshop Service Manual
- MF 6700 S Series General Specifications
- Dyna-4 Tractor Specifications
- Dyna-6 Tractor Specifications
- Dyna-VT Tractor Specifications
- Transmission Forward Speed References
- Dyna-4 and Dyna-6 Speed and Tyre Configurations
- Dyna-VT Transmission Speed References
- Tractor Dimensions and Weights
- Front and Rear Attachment Points
- Attachment Points with and Without Front Linkage
- Tractor Fluid Capacities
- Measurement Conversion Tables
- Retaining Compounds and Sealing Products
- Standard Screw and Nut Tightening Torques
- Hydraulic Union Tightening Torques
- Brake System Adjustments and Bleeding
- Dyna-VT Assisted Brake Master Cylinder Bleeding
- Dyna-4 and Dyna-6 Assisted Brake Master Cylinder Bleeding
- High-Pressure Braking System Bleeding
- Differential Lock and Four-Wheel-Drive Disengagement Calibration
- Forward-Travel Lever Calibration
- Forward Speed Calibration
- Dyna-4 and Dyna-6 PowerShuttle Calibration
- Dyna-6 Transmission Power Sensor Calibration
- Dyna-VT Transmission Calibration
- Dyna-VT High and Low Range Calibration
- Dyna-VT Coupler Function Calibration
- Front and Rear PTO Calibration
- Dyna-VT Transmission Calibration Error Codes
- Clutch Pedal Sensor Calibration
- Throttle Pedal Sensor Calibration
- Rear Linkage Calibration
- Front Linkage Position Sensor Calibration
- Suspended Front Axle Calibration
- Diagnostic Tool Calibration Procedures
- 02. Separation of Tractor Assemblies
- Front Linkage Removal and Refitting
- Front Axle Removal and Refitting
- Cooling Unit Removal and Refitting
- Front Frame Removal and Refitting
- Engine Cover Removal and Refitting
- Engine Removal and Refitting
- Engine Flywheel Reassembly
- Operator Environment Removal and Refitting
- 03. Engine and SCR Emission Systems
- Four-Cylinder Tier 4 Final / Stage IV Engine
- Engine Safety Instructions and Technician Notices
- Engine Type Identification
- Engine Serial Number Location
- Engine Lifting Instructions
- Engine Operating Principles
- Engine Mechanical Components
- Engine Air Intake and Exhaust Systems
- Engine Cooling System
- Engine Lubrication System
- Engine Fuel System
- Electronic Engine Control Circuit
- Closed Crankcase Ventilation (CCV) System
- Engine Compartment Component Layout
- Engine Oil Pressure Testing
- Engine Adjustments and Bleeding
- AGCO Power Engine Workshop References
- Selective Catalytic Reduction (SCR) Technology
- DEF / AdBlue Safety Instructions
- SCR System Operating Principles
- Four-Cylinder SCR System Architecture
- SCR System Schematic Diagrams
- SCR Component Identification and Location
- SCR Metering Module Removal
- SCR Injector Service
- SCR Coolant Solenoid Valve
- DEF / AdBlue Tank Service
- DEF / AdBlue Gauge Removal
- Diesel Oxidation Catalyst (DOC)
- SCR Engine Service Tools
- Engine Cylinder Block and Crank Mechanism Tools
- Engine Timing Gear and Flywheel Housing Tools
- Cylinder Head and Valve Mechanism Tools
- Coolant Pump and Engine Control System Tools
- 04. Clutch
- 05. Gearbox and Transmission Systems
- ML140 Transmission General Information
- ML140 Transmission Operating Principles
- Transmission Hydraulic Operating Diagrams
- Forward and Reverse High-Pressure Relief Valves
- Transmission Control Spool Valve
- Transmission Flushing Valve
- ML140 Gearbox Component Identification
- ML140 Transmission Hydraulic Testing
- Dyna-VT Module Disassembly
- Dyna-VT Transmission Reassembly
- Gearbox Filling Procedures
- Transmission High-Pressure Relief Valve Service
- Transmission Flushing Valve Removal and Refitting
- GBA25 Gearbox General Information
- Dyna-4 GBA25 Gearbox Operating Principles
- Dyna-6 GBA25 Gearbox Operating Principles
- Transmission Synchroniser Mechanisms
- Main Gearbox Robotic Control
- Dyna-4 and Dyna-6 Gearbox Specifications
- GBA25 Gearbox Component Layout
- Dyna-4 GBA25 Gearbox Disassembly
- Dyna-6 GBA25 Gearbox Disassembly
- Gearbox Synchroniser Servicing
- GBA25 PowerShuttle Operating Principles
- PowerShuttle Assembly and Component Identification
- Dyna-4 PowerShuttle Components
- Dyna-6 PowerShuttle Components
- PowerShuttle Disassembly and Reassembly
- Dyna-4 PowerShift Module
- Dyna-4 PowerShift Operating Principles
- Dynashift Module Removal and Refitting
- Dynashift Module Disassembly and Reassembly
- Dyna-4 Planetary Gear Servicing
- Dyna-6 PowerShift Module
- Dyna-6 PowerShift Operating Principles
- Dyna-6 PowerShift Module Removal and Refitting
- Dyna-6 Dynashift Module Servicing
- Dyna-6 Multiplier Module Servicing
- Dyna-6 Planetary Gear Disassembly and Reassembly
- GBA25 Robotic Mechanical Gearbox
- Robotic Gearbox Operating Principles
- Robotic Gearbox Primary and Secondary Shafts
- Reverse Layshaft and Synchroniser Control
- Transmission Shaft Removal and Refitting
- Primary and Secondary Shaft Disassembly
- Gearbox Shaft Shimming
- Selector Rail and Fork Adjustment
- Gearbox Interlock Mechanism Adjustment
- GBA25 Super Creeper Gear System
- Super Creeper Epicyclic Gear Trains
- Input and Output Planet Carrier Servicing
- Super Creeper Control Adjustment
- Transmission Service Tools
- 06. Rear Axle, Differential and Braking Systems
- HA140 Rear Axle General Information
- HA140 Rear Axle Operating Principles
- Rear Axle Main Component Identification
- HA140 Final Drive Assemblies
- Rear Final Drive Removal and Refitting
- HA140 Differential Assembly
- Differential and Drive Pinion Servicing
- Differential Removal and Refitting
- Differential Disassembly and Reassembly
- HA140 Rear Axle Braking System
- Hydraulically Assisted Tractor Braking
- Rear Brake Adjustment and Bleeding
- Rear Axle Brake Removal and Reassembly
- Assisted Brake Master Cylinder Service
- HA140 Hydraulic Trailer Braking
- Trailer Brake Hydraulic Testing
- GPA20 Rear Axle General Information
- GPA20 Centre Housing Assembly
- Heavy Duty and Heavy Duty Plus Final Drives
- Final Drive Planet Carrier Removal and Reassembly
- Axle Shaft Bearing and Seal Replacement
- Axle Shaft Bearing Shimming
- Super Heavy Duty Final Drive Units
- GPA20 Differential Assembly
- Differential Lock Disassembly and Reassembly
- Crownwheel and Drive Pinion Service
- Differential Backlash Adjustment
- GPA20 Brake Piston Service
- GPA20 Handbrake Unit and Controls
- Handbrake Control Adjustment
- Assisted Brake Master Cylinder Operation
- High-Pressure Braking System
- High-Pressure Brake Unit Removal and Refitting
- Load Sensing Trailer Braking
- Open Center Trailer Braking
- Brake Pedal Adjustment and Hydraulic Bleeding
- Rear Hitch and Linkage Assembly
- Linkage Angular Position Sensor Adjustment
- Linkage Cover Plate Removal and Refitting
- Hydraulic Lift Ram Disassembly and Reassembly
- Increased-Capacity Linkage Assemblies
- Pneumatic Trailer Braking System
- Pneumatic Brake Pressure and Sealing Tests
- Pneumatic Compressor Service
- Automatic Hitch System
- Automatic Hitch Control Adjustment
- Rear Wheel Hub and Axle Shaft Assemblies
- Rear Wheel Track Width Adjustment
- Rear Wheel Weight Installation
- 07. Power Take-Off (PTO)
- HA140 Power Take-Off General Information
- HA140 PTO Operating Principles
- PTO Clutch Disassembly and Reassembly
- PTO Shaft Disassembly and Reassembly
- GPA20 Power Take-Off System
- GPA20 PTO Clutch Assembly
- PTO Clutch Removal and Refitting
- PTO Intermediate Shaft and Drive Gear
- PTO Brake Assembly
- Two-Speed and Four-Speed PTO Arrangements
- PTO Drive Gear Shimming
- PTO Control Adjustment
- PTO Output Shaft Without Speed Selection
- PTO Output Shaft With Speed Selection
- Rear PTO Bearing Removal and Refitting
- PTO Shaft Gear Disassembly and Reassembly
- PTO Electrohydraulic Controls
- 540/1000 RPM PTO Control Service
- Standard and Economy PTO Control Service
- Groundspeed Power Take-Off System
- Groundspeed PTO Control Adjustment
- Zuidberg Front Power Take-Off
- Front PTO Hydraulic Pump and Clutch
- Front PTO Drive Shaft and Oil Cooler
- Front PTO Hydraulic and Electrical Testing
- Front PTO Filter and Oil Servicing
- Front PTO Removal and Reassembly
- 08. Front Axle and Four-Wheel-Drive Systems
- DANA 735 Front Axle
- DANA 735 Axle Specifications and Identification
- DANA 735 Front Axle Component Layout
- DANA 735 Oil Level Inspection
- DANA 735 Troubleshooting
- DANA 735 Tightening Torques
- DANA 740 Front Axle
- DANA 740 Axle Specifications and Identification
- DANA 740 Front Axle Component Layout
- DANA 740 Oil Level Inspection
- DANA 740 Troubleshooting
- DANA 740 Tightening Torques
- HA140 Four-Wheel-Drive Clutch
- Four-Wheel-Drive Clutch Operating Principles
- HA140 4WD Clutch Disassembly and Reassembly
- Universal Joint Shaft Brake
- Universal Joint Shaft Brake Disassembly and Reassembly
- GPA20 Four-Wheel-Drive Clutch
- GPA20 4WD Clutch Removal and Refitting
- GPA20 4WD Clutch Disassembly and Reassembly
- Closed Center Hydraulic Steering Unit
- Closed Center Steering Operating Principles
- Electrohydraulic Steering Operation
- Closed Center Steering Unit Removal and Refitting
- Open Center Hydraulic Steering Unit
- Open Center Steering Operating Principles
- Open Center Steering Unit Removal and Refitting
- 09. Hydraulic Systems and Pump Servicing
- HA140 Load Sensing Hydraulic System
- Load Sensing Operating Principles
- Trailer Brake Hydraulic Circuit
- Hydraulic Steering and Cooling Circuits
- High-Pressure Hydraulic System
- Power Beyond Distribution Unit
- Hydraulic Pressure Testing
- Auxiliary Hydraulic System Testing
- Steering Hydraulic Testing
- Variable Displacement Hydraulic Pump
- Fixed Displacement Hydraulic Pumps
- GPA20 Load Sensing Hydraulic System
- Hydraulic Filtration and Cooling
- Transmission Lubrication System
- GPA20 High-Pressure Hydraulic Testing
- GPA20 Low-Pressure Hydraulic Testing
- Hydraulic Cooling and Lubrication Testing
- Load Sensing Right-Hand Cover Plate
- Variable Displacement Pump Operation
- Hydraulic Priority Block
- Hydraulic Cover Plate Removal and Refitting
- Variable Displacement Pump Removal and Refitting
- Load Sensing Left-Hand Cover Plate
- Hydraulic Charge Pump Removal and Refitting
- Hydraulic Charge Pump Seal Replacement
- Load Sensing Linkage Spool Valve
- Linkage Spool Valve Removal and Refitting
- Rear Auxiliary Hydraulic Spool Valves
- Mechanical Auxiliary Spool Valves
- Electrohydraulic Auxiliary Spool Valves
- Auxiliary Spool Valve Cable Adjustment
- Front Auxiliary Hydraulic Spool Valves
- Dyna-4 and Dyna-6 Front Spool Valve Removal
- Dyna-VT Front Spool Valve Removal
- GPA20 Open Center Hydraulic System
- Open Center Low-Pressure Hydraulic Circuit
- Open Center High-Pressure Hydraulic Circuit
- Open Center Hydraulic Pressure Testing
- Open Center Right-Hand Cover Plate
- Open Center High-Pressure Valve Servicing
- Open Center Hydraulic Pump Removal and Refitting
- Open Center Left-Hand Cover Plate
- 100 L/min Open Center Hydraulic System
- 100 L/min High-Flow and Low-Flow Testing
- Open Center Linkage Spool Valve
- Open Center Auxiliary Spool Valves
- Hydraulic Flow Divider Operation and Adjustment
- Single-Acting and Double-Acting Spool Valves
- Floating-Position Spool Valve Operation
- Auxiliary Spool Valve Removal and Refitting
- Hydraulic Control Cable Installation and Adjustment
- 21-Bar Low-Pressure Hydraulic Valve
- 21-Bar Valve Adjustment and Servicing
- 5-Bar Valve Assembly
- 10. Electrical Equipment and Diagnostics
- Electrical Diagnostic Procedures
- Electrical Wiring Harness Insulation Testing
- Wiring Harness Continuity Testing
- CAN Network Testing
- Electrical Harness Inspection
- Electrical Voltage Measurement
- Electrical Component Resistance Testing
- Electrical Current Measurement
- Clamp Ammeter Testing Procedures
- Electrical Circuit General Information
- Electrical Wiring Colour Codes
- Electrical Circuit Schematic Diagrams
- Electrical Component Locations
- Fuse Box Operating Principles
- Fuse Box Connector Identification
- Fuse Box Removal and Refitting
- Alternator Component Identification
- Alternator Testing and Diagnostics
- Alternator Drive Belt Removal and Refitting
- Alternator Removal and Refitting
- Starter Motor Operating Principles
- Starter Motor Circuit Diagrams
- Starter Motor Diagnostics
- Starter Motor Removal and Refitting
- Battery Isolator System
- Battery Isolator Component Identification
- Triflash Warning Triangle Assembly
- Standard Roof Triflash Equipment
- High-Visibility Roof Triflash Equipment
- 11. Electronic Systems and Telemetry
- Electronic Diagnostic Tool
- Tractor Telemetry System
- Telemetry Operating Principles
- Telemetry Schematic Diagrams
- Telemetry Error Codes
- Telemetry Component Identification
- Telemetry Programming and Parameter Settings
- AGCOMMAND Aerial Access
- AM50 AGCOMMAND Unit Disassembly
- 12. Operator Environment and Air Conditioning
- Standard Cab Air Conditioning System
- Air Conditioning Operating Principles
- Air Conditioning Technical Specifications
- Air Conditioning Circuit Diagrams
- Air Conditioning Compressor Components
- Air Conditioning Testing and Diagnostics
- Air Conditioning System Cleaning
- Air Conditioning Maintenance and Safety
- Air Conditioning Compressor Clutch Air Gap Adjustment
- Air Conditioning System Draining and Leak Testing
- Air Conditioning System Refilling
- Air Conditioning Pressure Testing
- Roof Trim Removal and Refitting
- Air Conditioning Drive Belt Service
- Air Conditioning Dryer Replacement
- Self-Regulating Air Conditioning System
- Self-Regulating Fan Control
- Air Conditioning Compressor Activation
- Defrosting and Air Recirculation Functions
- Self-Regulating Air Conditioning Testing
- Self-Regulating Air Conditioning Maintenance
- Mechanical Cab Suspension
- Mechanical Suspension Component Identification
- Mechanical Suspension Tightening Torques
- Active Mechanical Cab Suspension
- Active Suspension Operating Principles
- Active Suspension Schematic Diagrams
- Active Suspension Assembly and Service References
- 13. Accessories
- 14. Workshop Service Tools
- General Workshop Tools
- Tractor Assembly Separation Tools
- AGCO Power Engine Service Tools
- Engine Cylinder Block and Crankshaft Tools
- Engine Timing Gear and Flywheel Housing Tools
- Cylinder Head and Valve Mechanism Tools
- Engine Control and Troubleshooting Tools
- SCR Engine Service Tools
- GBA25 PowerShift Module Tools
- PowerShuttle Service Tools
- Robotic Mechanical Gearbox Tools
- ML140 Transmission Service Tools
- GPA20 Rear Final Drive Tools
- Rear Differential Service Tools
- Rear Axle Braking Tools
- Hydraulic Linkage Service Tools
- Power Take-Off Clutch Tools
- Front Axle and Four-Wheel-Drive Clutch Tools
- Hydraulic Pressure Testing Tools
- Load Sensing Hydraulic System Tools
- Electrical Drive Belt Tools
- Electrical Harness Service Tools
- Operator Environment and Air Conditioning Belt Tools
Hydraulic Pump and Transmission Configuration References
The workshop manual includes separate hydraulic pump removal and refitting procedures for Load Sensing and Open Center systems. These references cover variable displacement pumps, fixed displacement pumps, charge pumps and the hydraulic cover plate assemblies. The hydraulic chapters also distinguish high-pressure and low-pressure testing, auxiliary spool valve arrangements and 100 L/min Open Center configurations.
Transmission servicing is divided between the GBA25 Dyna-4 and Dyna-6 systems and the ML140 Dyna-VT documentation. Separate sections cover PowerShuttle components, PowerShift modules, robotic gearbox adjustments, hydraulic testing and transmission calibration. Technicians should identify the fitted transmission and hydraulic configuration when consulting these references.
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