Overview
The Massey Ferguson MF 8925 and MF 8926 Telescopic Handler Workshop Service Repair Manual provides detailed technical information for maintaining, diagnosing and repairing these Massey Ferguson telescopic handlers. The workshop documentation covers boom assemblies, hydraulic lift and extension cylinders, bucket positioning systems, hydrostatic pumps and drive motors, front and rear axle assemblies, differential components, braking systems, steering equipment, electrical circuits, engine servicing and operator cab components.
Technical coverage includes hydraulic cylinder removal and overhaul, main relief valve adjustment, steering mode valve servicing, joystick repairs, hydrostatic transmission pressure-related troubleshooting, axle planetary gear and differential overhaul, boom wear pad replacement, Quick Tach attachment components and service brake maintenance. Additional sections address electrical wiring diagrams, Susmic diagnostics, ISL calibration, service software, air-conditioning system repairs, engine component references, machine specifications, hydraulic fittings and tightening torques.
Safety: The manual includes instructions for lifting and blocking the telehandler, installing and removing the approved boom stop, transporting and towing the machine, and inspecting the operator restraint system. Read the applicable safety instructions before performing maintenance, hydraulic repairs or boom-related servicing.
Important Information: Certain components listed in the original service index are marked as not available at the time of printing. These entries should not be interpreted as complete repair procedures. Consult the relevant section to confirm the information provided for the component being serviced.
Table of Contents
Massey Ferguson MF 8925, MF 8926 Manual
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01. Foreword and Workshop Manual Introduction
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02. Safety Instructions
- General Safety Instructions
- Fire Prevention
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03. Serial Number Locations
- Telescopic Handler Serial Number
- Engine Serial Number
- Other Component Serial Numbers
- 04. Delivery Report
- 05. Telehandler Identification
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06. Safety and Preventive Maintenance
- Maintenance Safety Instructions
- Lifting and Blocking the Telehandler
- Safe Lifting and Blocking Procedure
- Operator Cab and Canopy
- Operator Cab Emergency Exit
- Cab Door and Window
- Transporting the Telehandler
- Telehandler Transport Procedure
- Towing the Telehandler
- Telehandler Towing Procedure
- Routine Service Schedule
- Engine Air Cleaner Service
- Air Cleaner Filter Element Replacement
- Engine Cooling System Maintenance
- Cooling System Cleaning
- Engine Coolant Level Inspection
- Engine Coolant Replacement
- Fuel System Maintenance
- Fuel Specifications
- Fuel Tank Filling
- Fuel Filter Servicing
- Engine Lubrication System
- Engine Oil Level Inspection
- Engine Oil Specifications and Chart
- Engine Oil and Filter Replacement
- Hydraulic and Hydrostatic System Maintenance
- Hydraulic Fluid Level Inspection
- Hydraulic and Hydrostatic Filter Replacement
- Hydraulic Fluid Replacement
- Front and Rear Axle Maintenance
- Planetary Carrier Oil Level Inspection
- Planetary Carrier Oil Draining
- Rear Differential Oil Inspection and Draining
- Front Differential Oil Inspection and Draining
- Machine Lubrication Procedures
- Tyre Maintenance
- Wheel Nut Inspection
- Tyre Rotation and Mounting
- Spark Arrestor Muffler Maintenance
- Approved Boom Stop
- Boom Stop Installation and Removal
- Engine Cover Opening and Closing
- Lateral Operator Restraint System
- Operator Restraint System Inspection
- Operator Restraint System Maintenance
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07. Hydraulic System and Component Servicing
- Hydraulic System General Information
- Hydraulic System Troubleshooting Chart
- Hydraulic Connection Tightening Procedures
- Hydraulic Lift Cylinder
- Lift Cylinder Removal and Installation
- Lift Cylinder Component Identification
- Lift Cylinder Disassembly and Reassembly
- Bucket Positioning Cylinder
- Bucket Positioning Cylinder Removal and Installation
- Bucket Positioning Cylinder Disassembly and Reassembly
- Telescopic Boom Extension Cylinder
- Extension Cylinder Group Removal and Installation
- Extension Cylinder Upper Tubeline Removal
- Extension Cylinder Upper Tubeline Installation
- Extension Cylinder Removal and Installation
- Extension Tubeline Tray Disassembly
- Extension Tubeline Tray Reassembly
- Extension Cylinder Component Identification
- Extension Cylinder Disassembly and Reassembly
- Hydraulic Tilt Cylinder
- Tilt Cylinder Removal and Installation
- Tilt Cylinder Disassembly and Reassembly
- Front Hydraulic Steering Cylinder
- Front Steering Cylinder Removal and Installation
- Front Steering Cylinder Disassembly and Reassembly
- Rear Hydraulic Steering Cylinder
- Rear Steering Cylinder Removal and Installation
- Rear Steering Cylinder Disassembly and Reassembly
- Hydraulic Drive Box
- Drive Box Component Identification
- Drive Box Disassembly
- Drive Box Component Inspection
- Drive Box Reassembly
- Main Hydraulic Relief Valve
- Main Relief Valve Pressure Testing
- Main Relief Valve Adjustment
- Main Relief Valve Removal and Installation
- Quick Tach Hydraulic Cylinder
- Quick Tach Cylinder Removal and Installation
- Quick Tach Cylinder Disassembly and Reassembly
- Hydraulic Port Relief Valves
- Port Relief Valve Adjustment
- Steering Mode Valve Block
- Steering Mode Valve Block Removal and Installation
- Steering Mode Valve Disassembly
- Steering Mode Solenoid Testing
- Steering Mode Valve Reassembly
- Hydraulic Brake Valve
- Brake Valve Removal and Installation
- Brake Valve Disassembly and Reassembly
- Hydraulic Steering Valve
- Steering Valve Removal and Installation
- Steering Valve Component Identification
- Steering Valve Disassembly
- Steering Valve Inspection and Reassembly
- Hydraulic Joystick Controls
- Joystick Handle Removal and Installation
- Joystick Assembly Removal and Installation
- Joystick Component Identification
- Joystick Disassembly and Reassembly
- Hydraulic Parking Brake System
- Parking Brake Pressure Switch Removal and Installation
- Parking Brake Pressure Switch Servicing
- Parking Brake Valve Removal and Installation
- Parking Brake Valve Disassembly and Reassembly
- Front Auxiliary Hydraulic Pressure Connections
- Front Auxiliary Hydraulic Assembly Removal and Installation
- Front Auxiliary Hydraulic Component Disassembly
- Hydraulic Flow Control Valve
- Flow Control Valve Removal and Installation
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08. Hydrostatic Transmission and Drive System
- Hydrostatic System General Information
- Hydrostatic System Troubleshooting
- Hydrostatic Replenishing Valve Operation
- Hydrostatic Drive Motor
- Hydrostatic Drive Motor Component Identification
- Hydrostatic Drive Motor Disassembly
- Hydrostatic Drive Motor Inspection
- Hydrostatic Drive Motor Reassembly
- Hydrostatic Pump
- Hydrostatic Pump Removal and Installation
- Hydrostatic Pump Component Identification
- Hydrostatic Pump Disassembly
- Hydrostatic Pump Inspection
- Hydrostatic Pump Reassembly
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09. Drive System, Axles and Brakes
- Drive System Troubleshooting Chart
- Front Axle and Differential
- Front Axle General Information
- Front Planetary Carrier Components
- Front Planetary Carrier Disassembly and Inspection
- Front Wheel Hub Components
- Front Wheel Hub Disassembly and Inspection
- Front Steering Knuckle Disassembly
- Front Axle Housing and Drive Axle Components
- Front Axle Housing Disassembly
- Front Brake Group Components
- Front Brake Group Disassembly and Inspection
- Front Differential Components
- Front Differential Disassembly and Inspection
- Front Differential Pinion Group
- Front Pinion Group Disassembly and Inspection
- Front Pinion Group Reassembly
- Front Differential Reassembly
- Front Brake Group Reassembly
- Front Axle Housing Reassembly
- Front Steering Knuckle Reassembly
- Front Wheel Hub Reassembly
- Front Planetary Carrier Reassembly
- Rear Axle and Differential
- Rear Axle General Information
- Rear Planetary Carrier Components
- Rear Planetary Carrier Disassembly and Inspection
- Rear Wheel Hub Components
- Rear Wheel Hub Disassembly and Inspection
- Rear Steering Knuckle Disassembly
- Rear Axle Housing and Drive Axle Components
- Rear Axle Housing Disassembly
- Rear Differential Components
- Rear Differential Disassembly and Inspection
- Rear Differential Pinion Group
- Rear Pinion Group Disassembly and Inspection
- Rear Pinion Group Reassembly
- Rear Differential Reassembly
- Rear Axle Housing Reassembly
- Rear Steering Knuckle Reassembly
- Rear Wheel Hub Reassembly
- Rear Planetary Carrier Reassembly
- Front Axle Removal and Installation
- Front Axle Toe-In Adjustment
- Parking Brake Release for Towing
- Parking Brake Reactivation
- Steering Angle Adjustment
- Driveshaft Removal and Installation
- Service Brake Operating Description
- Service Brake Circuit Bleeding
- Rear Axle Removal and Installation
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10. Main Frame, Boom and Operator Components
- Main Frame General Information
- Operator Canopy Removal and Installation
- Operator Seat Removal and Installation
- Telescopic Boom Assembly
- Boom Assembly Removal and Installation
- Inner Telescopic Boom
- Inner Boom Removal and Installation
- Front Boom Wear Pads
- Front Wear Pad Removal and Installation
- Rear Boom Wear Pads
- Rear Wear Pad Removal and Installation
- Quick Tach Attachment Assembly
- Quick Tach Removal and Installation
- Fender Removal and Installation
- Joystick Control Panel Removal and Installation
- Dashboard Cover Removal and Installation
- Steering Column Cover Removal and Installation
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11. Electrical System, Wiring and Diagnostic Analysis
- Electrical System General Information
- Reading the Electrical Schematics
- Telehandler Electrical Wiring Diagrams
- Susmic System Error Codes
- Susmic System Testing
- ISL Calibration
- Electrical System Troubleshooting Chart
- Electrical Fuses, Diodes and Relays
- Battery Removal and Installation
- Battery Servicing
- Booster Battery and Jump-Starting Procedures
- Alternator Removal and Installation
- Alternator Drive Belt Adjustment
- Rear Light Removal and Installation
- Front Light Removal and Installation
- Travel and Signal Lever Removal and Installation
- Instrument Panel Removal and Installation
- Electrical Switch Panel Removal and Installation
- Brake Light Switch Removal and Installation
- Brake Light Switch Adjustment
- Front Windscreen Wiper Motor
- Upper Windscreen Wiper Motor
- Rear Windscreen Wiper Motor
- Pedal Assembly Removal and Installation
- Pedal Assembly Disassembly and Reassembly
- Inching Switch Removal and Installation
- Inching Switch Adjustment
- Service Software
- Connecting a Laptop Computer
- Accessing the Service Software
- Service Software Monitor Screen
- Service Software Warning Screen
- Inching Pedal Calibration
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12. Engine Service and Associated Components
- Engine Speed Control
- Engine Muffler
- Engine Air Cleaner
- Engine Radiator
- Engine and Engine Mounts
- Engine Components and Testing
- Engine and Hydrostat Assembly
- Engine Flywheel and Housing
- Engine Reconditioning
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13. Heating, Ventilation and Air Conditioning
- Air Conditioning System General Information
- Air Conditioning System Flow Principles
- Air Conditioning Flow Chart
- Air Conditioning Component Identification
- Air Conditioning Safety Equipment
- Air Conditioning Regular Maintenance
- Compressor Drive Belt Inspection
- Air Conditioning Condenser Cleaning
- Air Conditioning Filter Element Replacement
- Air Conditioning Basic Troubleshooting
- Poor Air Conditioning Performance
- Air Conditioning Electrical System Inspection
- General Air Conditioning Servicing
- Air Conditioning Compressor Oil
- Compressor Oil Inspection
- Refrigeration System Leak Inspection
- Air Conditioning Component Replacement
- Air Conditioning System Troubleshooting Chart
- Refrigerant Gauge Pressure Troubleshooting
- Air Conditioning Temperature and Pressure Chart
- Air Conditioning Service Chart
- Refrigerant Recovery and Charging
- Refrigerant Reclamation Procedure
- Air Conditioning Manifold Gauge Charging Procedure
- Air Conditioning Compressor Removal and Installation
- Compressor Clutch Disassembly and Reassembly
- Condenser Removal and Installation
- Receiver/Drier Removal and Installation
- Air Conditioning Pressure Switch Removal and Installation
- Evaporator and Blower Unit Removal and Installation
- Expansion Valve Removal and Installation
- Cab Heater Assembly
- Heater Fan Removal and Installation
- Heater Core Removal and Installation
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14. Technical Specifications and Workshop References
- Telehandler General Specifications
- Machine Dimensional Specifications
- Telehandler Performance Specifications
- Engine Specifications
- Machine Control Specifications
- Drive System Specifications
- Tyre Specifications
- Fluid and System Capacities
- Hydraulic System Specifications
- Electrical System Specifications
- Instrument Panel Specifications
- Engine Technical Specifications
- Machine Component Tightening Torques
- Front and Rear Axle Tightening Torques
- Boom Assembly Tightening Torques
- Drive Box Tightening Torques
- Hydrostatic Drive Motor Tightening Torques
- Engine Tightening Torques
- Hydraulic Pump Tightening Torques
- General SAE Bolt Tightening Torques
- General Metric Bolt Tightening Torques
- Hydraulic Connection Specifications
- O-Ring Face Seal Hydraulic Connections
- Straight-Thread O-Ring Fittings
- Hydraulic Tubelines and Hoses
- Hydraulic Flare Fittings
- O-Ring Flare Fittings
- Hydraulic Port Seal Fittings
- Hydraulic and Hydrostatic Fluid Specifications
- Decimal and Millimetre Equivalents
- US and Metric Measurement Conversions
Hydraulic Component Service Coverage and Publication Limits
The workshop manual provides individual servicing references for the boom lift, extension, tilt and bucket positioning cylinders, along with front and rear steering cylinders, the Quick Tach cylinder, steering mode valve block, joystick and selected hydraulic control valves. These sections identify the relevant removal, installation, disassembly, inspection, testing or reassembly information available for each component.
Publication coverage limitation: The original index marks several components as information not available at the time of printing. Examples include the hydraulic gear pump, fan motor, hydraulic reservoir, hydraulic control valve, pressure-reducing valve, accumulator, tow valve and hydrostatic oil cooler. The index also marks certain main-frame and electrical components, including the operator cab and starter, in this way. These listings should not be treated as complete overhaul instructions.
For work involving boom lifting or extension, refer to the maintenance safety section covering lifting and blocking the machine and the approved boom stop. Hydraulic testing, component removal and system reassembly should be undertaken using the applicable procedures and specifications provided in the workshop documentation.
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