Case MDX71 Operating instructions

MDX71, MDX81, MDX91
Disc Mowers
Repair Manual
87023825

158 -- 3/03
SECTION 00 -- GENERAL INFORMATION
SECTION 31 -- IMPLEMENT POWER TAKE-OFF
SECTION 35 -- HYDRAULIC SYSTEM
SECTION 39 -- FRAMES
SECTION 58 -- ATTACHMENTS AND HEADERS
SECTION 88 -- ACCESSORIES
SECTION 90 -- SAFETY DECALS
The sections used through out all Case IH product Repair manuals may
not be used for each product. Each Repair manual will be made up of one
or several books.
The sections listed above are the sections utilized for the MDX71, MDX81
and MDX91 Disc Mowers.
¤2003 CASE, LLC
MDX71, MDX81, MDX91
REPAIR MANUAL
CONTENTS

COMPLETE CONTENTS
SECTION 00 - GENERAL INFORMATION
Chapter 1 - General Information
CONTENTS
Section Description Page
Precautionary Statements 2.......................................................
Safety 3........................................................................
Ecology and the Environment 4....................................................
International Symbols 5...........................................................
Hardware Torque Values 6........................................................
Installation of Adjustable Fittings In Straight Thread O Ring Bosses 9...................
Standard Torque Data For Hydraulic Tubes and Fittings 9.............................
Pipe Thread Fitting Torque 10....................................................
Installation of ORFs (O Ring Flat Faced) Fittings 10..................................
Attaching the Mower to the Tractor 12..............................................
Setting Up the Flotation System 23................................................
Lowering the Cutter Bar for Field Operation 24......................................
Transporting the Mower 25.......................................................
Removing the Mower from the Tractor 26...........................................
Storing the Mower 28............................................................
SECTION 00 - GENERAL INFORMATION
Chapter 2 - Adjustments
CONTENTS
Section Description Page
Opening Fields 2................................................................
Field Cutting 2...................................................................
Operating Recommendations 4....................................................
Adverse Field Conditions 5........................................................
Cutter Bar Flotation 6.............................................................
Cutting Height 9.................................................................
Breakaway Latch 9...............................................................
Right Swathboard (Standard) 11...................................................
Drive Belt 11....................................................................
Drive Belt Replacement 11........................................................

SECTION 00 - GENERAL INFORMATION
Chapter 3 - Lubrication
CONTENTS
Section Description Page
Lubrication 2....................................................................
Recommended Lubricants 2.......................................................
Grease Fittings 3................................................................
Gearboxes 3....................................................................
Bevel Gearbox 3.................................................................
Bevel Gearbox Breather 4.........................................................
Drive Module 4..................................................................
Drive Module Breather 4..........................................................
Cutter Bar Modules 5.............................................................
Grease Fittings 6................................................................
SECTION 00 - GENERAL INFORMATION
Chapter 4 - Troubleshooting
CONTENTS
Section Description Page
Troubleshooting 2................................................................
SECTION 00 - GENERAL INFORMATION
Chapter 5 - Specifications
CONTENTS
Section Description Page
Specifications 2..................................................................

SECTION 31 - IMPLEMENT POWER TAKE-OFF
Chapter 1 - PTO
CONTENTS
Section Description Page
Implement Power Take-off (PTO) 2.................................................
Twist Lock - Disassembly 3........................................................
Twist Lock - Assembly 4..........................................................
Overrunning Clutch - Disassembly 5................................................
Overrunning Clutch - Assembly 5..................................................
Shielding - Disassembly 7.........................................................
Shielding - Assembly 8...........................................................
U-joints - Disassembly 9..........................................................
U-joints - Inspection 10..........................................................
U-joints - Assembly 10...........................................................
PTO Shaft Tube Replacement 11..................................................
SECTION 31 - IMPLEMENT POWER TAKE-OFF
Chapter 2 - Jackshaft
CONTENTS
Section Description Page
Belt Tension Jackshaft - Disassembly 2.............................................
Belt Drive Jackshaft - Assembly 5..................................................
SECTION 35 - HYDRAULIC SYSTEM
Chapter 1 - Cylinders
CONTENTS
Section Description Page
Disassembly 2...................................................................
Inspection 3.....................................................................
Assembly 4.....................................................................

SECTION 39 - FRAMES
Chapter 1 - Breakaway Link
CONTENTS
Section Description Page
Disassembly 2...................................................................
Inspection 4.....................................................................
Assembly 4.....................................................................
SECTION 58 - ATTACHMENTS AND HEADERS
Chapter 1 - Bevel Gearbox
CONTENTS
Section Description Page
Removal 2......................................................................
Disassembly 6...................................................................
Reassembly 8...................................................................
Installation 12..................................................................
SECTION 58 - ATTACHMENTS AND HEADERS
Chapter 2 - Cutter Bar
CONTENTS
Section Description Page
Introduction 2...................................................................
Discs 4.........................................................................
Knife and Bolt Inspection 5........................................................
Knife Replacement 6.............................................................
Rock Guards 8..................................................................
Skid Shoes 8....................................................................
Cutter Bar Inspection/Failure Analysis 8.............................................
Top Cap - Removal 10...........................................................
Top Cap - Inspection 11...........................................................
Top Cap - Installation 12.........................................................
Cutter Bar - Disassembly 14......................................................
Cutter Bar - Reassembly 15......................................................

SECTION 58 - ATTACHMENTS AND HEADERS
Chapter 2 - Cutter Bar (Continued)
CONTENTS
Section Description Page
Disc Module - Disassembly 18....................................................
Disc Module - Assembly 20.......................................................
Drive Module - Removal 24.......................................................
Drive Module - Installation 27.....................................................
Drive Module - Disassembly 30...................................................
Drive Module - Assembly 32......................................................
SECTION 88 - ACCESSORIES
Chapter 1 - Accessories
CONTENTS
Section Description Page
Left Swathboard Kit 2.............................................................
High Stubble Kit 3................................................................
Knives 5........................................................................
7 Degree Twist Knives 5..........................................................
14 Degree Twist Knives 5.........................................................
VKnives 5......................................................................
SECTION 90 - SAFETY DECALS
Chapter 1 - Safety Decals
CONTENTS
Section Description Page
Safety Decals 2..................................................................

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-1
SECTION 00 - GENERAL INFORMATION
Chapter 1 - General Information
CONTENTS
Section Description Page
Precautionary Statements 2.......................................................
Safety 3........................................................................
Ecology and the Environment 4....................................................
International Symbols 5...........................................................
Hardware Torque Values 6........................................................
Installation of Adjustable Fittings In Straight Thread O Ring Bosses 9...................
Standard Torque Data For Hydraulic Tubes and Fittings 9.............................
Pipe Thread Fitting Torque 10....................................................
Installation of ORFs (O Ring Flat Faced) Fittings 10..................................
Attaching the Mower to the Tractor 12..............................................
Setting Up the Flotation System 23................................................
Lowering the Cutter Bar for Field Operation 24......................................
Transporting the Mower 25.......................................................
Removing the Mower from the Tractor 26...........................................
Storing the Mower 28............................................................

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-2
PRECAUTIONARY
STATEMENTS
PERSONAL SAFETY
Throughout this manual and on machine decals, you will find precautionary statements (“DANGER”,
“WARNING”, and “CAUTION”) followed by specific instructions. These precautions are intended for the personal
safety of you and those working with you. Please take the time to read them.
DANGER
This word “DANGER” indicates an immediate hazardous situation that, if not avoided, will result in death
or serious injury. The color associated with Danger is RED.
WARNING
This word “WARNING” indicates a potentially hazardous situation that, if not avoided, could result in
death or serious injury. The color associated with Warning is ORANGE.
CAUTION
This word “CAUTION” indicates a potentially hazardous situation that, if not avoided, may result in minor
or moderate injury. It may also be used to alert against unsafe practices. The color associated with
Caution is YELLOW.
FAILURE TO FOLLOW THE “DANGER”, “WARNING”, AND “CAUTION” INSTRUCTIONS MAY RESULT IN
SERIOUS BODILY INJURY OR DEATH.
MACHINE SAFETY
The precautionary statement (“IMPORTANT”) is followed by specific instructions. This statement is intended for
machine safety.
IMPORTANT: The word “IMPORTANT” is used to inform the reader of something he needs to know to prevent
minor machine damage if a certain procedure is not followed.
INFORMATION
NOTE: Instructions used to identify and present supplementary information.