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.

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-3
SAFETY
PRECAUTIONARY STATEMENTS
A careful operator is the best operator. Most accidents can be avoided by observing certain precautions. To help
prevent accidents, read the following precautions before operating this equipment. Equipment should be
operated only by those who are responsible and instructed to do so.
Carefully review the procedures given in this manual with all operators. It is important that all operators be familiar
with and follow safety precautions.
1. Do not clean, lubricate, or make any adjust-
mentstothemowerwhilethemachineisin
operation.
2. Do not start the mower until you know that ev-
eryone is clear of the machine and have made
sure that no tools are lying on the machine.
3. Do not work around the unit in loose clothing
that might catch in any of the moving parts.
4. Do not attempt to pull material from any part
of the mower while the machine is in opera-
tion.
5. Do not get off the tractor while the mower is
in operation.
6. Keep protective curtain in good operating
conditionand in the down operating position.

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-4
ECOLOGY AND THE ENVIRONMENT
Soil, air, and water are vital factors of agriculture and
life in general. When legislation does not yet rule the
treatment of some of the substances which are
required by advanced technology, common sense
should govern the use and disposal of products of a
chemical and petrochemical nature.
The following are recommendations which may be of
assistance:
•Become acquainted with and ensure that you
understand the relative legislation applicable to
your country.
•Where no legislation exists, obtain information
from suppliers of oils, filters, batteries, fuels,
antifreeze, cleaning agents, etc., with regard to
their effect on man and nature and how to safely
store, use and dispose of these substances.
Agricultural consultants will, in many cases, be
able to help you as well.
HELPFUL HINTS
1. Avoid filling tanks using cans or inappropriate
pressurized fuel delivery systems which may
cause considerable spillage.
2. In general, avoid skin contact with all fuels, oils,
acids, solvents, etc. Most of them contain
substances which may be harmful to your health.
3. Modern oils contain additives. Do not burn
contaminated fuels and or waste oils in ordinary
heating systems.
4. Avoid spillage when draining off used engine
coolant mixtures, engine, gearbox and hydraulic
oils, brake fluids, etc. Do not mix drained brake
fluids or fuels with lubricants. Store them safely
until they can be disposed of in a proper way to
comply with local legislation and available
resources.
5. Modern coolant mixtures, i.e. antifreeze and
other additives, should be replaced every two
years. They should not be allowed to get into the
soil but should be collected and disposed of
safely.
6. Do not open the air-conditioning system yourself.
It contains gases which should not be released
into the atmosphere. Your dealer or air
conditioning specialist has a special extractor for
this purpose and will have to recharge the system
properly.
7. Repair any leaks or defects in the engine cooling
or hydraulic system immediately.
8. Do not increase the pressure in a pressurized
circuit as this may lead to a component failure.
9. Protect hoses during welding as penetrating
weld splatter may burn a hole or weaken them,
allowing the loss of oils, coolant, etc.

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-5
INTERNATIONAL SYMBOLS
As a guide to the operation of your tractor, various universal symbols have been utilized on the instruments, con-
trols, switches, and fuse box. The symbols are shown below with an indication of their meaning.
Headlamp
dipped beam
Stop
lamps
Thermostart
starting aid
Alternator
charge
Fuel level
Engine speed
(rev/min x 100)
Hours recorded
Engine oil
pressure
Engine coolant
temperature
Tractor lights
Headlamp
main beam
Work lamps
Automatic
Fuel shut-off
Coolant
level
Turn signals
Turn signals
--one trailer
Turn signals
--two trailers
Heater fan
Front wind-
screen
wash/wipe
Air filter
blocked
Parking
brake
Rear wind-
screen
wash/wipe
Horn
Roof
beacon
Radio
Keep alive
memory
Heater temp-
erature control
Air conditioner
Warning!
Warning!
Corrosive
substance
P. T. O .
Transmission
in neutral
Creeper
gears
Slow or
low setting
Fast or high
setting
Ground
speed
FWD
engaged
FWD
disengaged
Variable
control
Differential
lock
Rear axle
oil tem-
perature
Transmission
oil pressure
Pressurised!
Open carefully
Malfunction!
See Operator’s
Manual
Position
Control
Draft
Control
Hitch disabled
%age
slip
Hitch raise
(rear)
Hitch lower
(rear)
Hitch height
limit (rear)
Remote
valve extend
Remote
valve retract
Remote
valve float
Hydraulic and
transmission
filters
Accessory
socket
Implement
socket
Hazard
warning lights
KAM N
Malfunction!(altern
a
tive symbol)
Trailer
brake
Hitch height
limit (front)
Brake fluid
level

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-6
DANGER
To prevent injury to bystanders, this mower is
not intended for roadside or municipal mowing.
This mower is intended for agricultural use only.
Left and right are determined by standing behind the
unit, looking in the direction of travel.
The product identification number plate, 1, for the
Models MDX71/81/91 is located on the left side of the
main frame.
19986828
1
1
HARDWARE TORQUE VALUES
Check the tightness of hardware periodically.
Use the following charts to determine the correct
torque when checking, adjusting or replacing
hardware on the tractor.
IMPORTANT: DO NOT use the values listed in the
charts if a different torque value or tightening
procedure is specified in this manual for a specific
application. Torque values listed are for general use
only.
Install a lock washer on all bolts unless a locknut or
jam nut is specified.
Install a flat washer at all slotted holes unless a
carriage bolt or flanged head bolt is specified.
Make sure fastener threads are clean and not
damaged.
NOTE: A torque wrench is necessary to properly
torque hardware.

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-7
NOTE: Torque values shown with * are inch pounds.
M24 411 (303) 531 (392) 648 (478) 839 (619) 897 (662) 1160 (855) 458 (338)
M20 237 (175) 307 (226) 375 (277) 485 (358) 519 (383) 671 (495) 265 (195)
M16 121 (89) 158 (117) 186 (137) 240 (177) 266 (196) 344 (254) 131 (97)
M12 49 (36) 63 (46) 75 (55) 97 (72) 107 (79) 138 (102) 53 (39)
M10 28 (21) 36 (27) 43 (32) 56 (41) 61 (45) 79 (58) 30 (22)
M8 14 (124*) 18 (159*) 22 (195*) 28 (248*) 31 (274*) 40 (354*) 15 (133*)
M6 5.8 (51*) 7.6 (67*) 8.9 (79*) 12 (102*) 13 (115*) 17 (150*) 6.3 (56*)
M4 1.7 (15*) 2.2 (19*) 2.6 (23*) 3.4 (30*) 3.7 (33*) 4.8 (42*) 1.8 (16*)
MINIMUM HARDWARE TIGHTENING TORQUES
IN NEWTON-METERS (FOOT POUNDS) FOR NORMAL ASSEMBLY APPLICATIONS
METRIC HARDWARE AND LOCKNUTS
NOMINAL UNPLATED PLATED UNPLATED PLATED UNPLATED PLATED CL.8
SIZE W/ZnCr W/ZnCr W/ZnCr w/CL8.8
BOLT
CLASS 5.8 CLASS 8.8 CLASS 10.9 LOCKNUT

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-8
GRADE A NO MARK
NOTE: Torque values shown with * are inch pounds.
IDENTIFICATION
CAP SCREWS AND CARRIAGE BOLTS
LOCKNUTS
1 289 (213) 373 (275) 742 (547) 960 (708) 1048 (773) 1356 (1000) 523 (386) 739 (545) 1
7/8 193 (142) 248 (183) 495 (365) 641 (473) 698 (515) 904 (667) 350 (258) 494 (364) 7/8
3/4 198 (146) 256 (189) 306 (226) 397 (293) 432 (319) 560 (413) 217 (160) 306 (226) 3/4
5/8 112 (83) 145 (107) 174 (128) 224 (165) 244 (180) 316 (233) 122 (90) 172 (127) 5/8
9/16 81 (60) 104 (77) 125 (92) 163 (120) 176 (130) 229 (169) 88 (65) 125 (92) 9/16
1/2 57 (42) 73 (54) 87 (64) 113 (83) 123 (91) 159 (117) 61 (45) 88 (64) 1/2
7/16 37 (27) 47 (35) 57 (42) 73 (54) 80 (59) 104 (77) 41 (30) 57 (42) 7/16
3/8 23 (17) 30 (22) 35 (26) 46 (34) 50 (37) 65 (48) 26 (19) 35 (26) 3/8
5/16 13 (115*) 17 (149*) 20 (178*) 26 (229*) 28 (250*) 37 (324*) 14 (125*) 20 (176*) 5/16
1/4 6.2 (55*) 8.1 (72*) 9.7 (86*) 13 (112*) 14 (121*) 18 (157*) 6.9 (61*) 9.8 (86*) 1/4
MINIMUM HARDWARE TIGHTENING TORQUES
IN NEWTON-METERS (FOOT POUNDS) FOR NORMAL ASSEMBLY APPLICATIONS
INCH HARDWARE AND LOCKNUTS
NOMINAL UNPLATED PLATED UNPLATED PLATED UNPLATED PLATED GR.B GR.C NOMINAL
SIZE or W/ZnCr or W/ZnCr or W/ZnCr w/GR5 w/GR8 SIZE
PLATED PLATED PLATED BOLT BOLT
SILVER GOLD SILVER GOLD SILVER GOLD
SAE GRADE 2 SAE GRADE 5 SAE GRADE 8 LOCKNUTS
SAE GRADE 2 SAE GRADE 5 SAE GRADE 8
REGULAR NUTS SAE GRADE 5
HEX NUTS
SAEGRADE8
HEX NUTS
GRADE IDENTIFICATION
GRADE A NO NOTCHES
GRADE B ONE CIRCUMFERENTIAL NOTCH
GRADE C TWO CIRCUMFERENTIAL NOTCHES
GRADE IDENTIFICATION
GRADE A NO MARKS
GRADE B THREE MARKS
GRADE C SIX MARKS
MARKS NEED NOT BE LOCATED
GRADE IDENTIFICATION
AT CORNERS
GRADE B LETTER B
GRADE C LETTER C

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-9
INSTALLATION OF ADJUSTABLE
FITTINGS IN STRAIGHT THREAD
ORINGBOSSES
1. Lubricate the O ring by coating it with a light oil or
petroleum. Install the O ring in the groove
adjacent to the metal backup washer which is
assembled at the extreme end of the groove, 4.
2. Install the fitting into the SAE straight thread boss
until the metal backup washer contacts the face
of the boss, 5.
NOTE: Do not over tighten and distort the metal
backup washer.
3. Position the fitting by turning out
(counterclockwise) up to a maximum of one turn.
Holding the pad of the fitting with a wrench,
tighten the locknut and washer against the face
of the boss, 6.
2
STANDARD TORQUE DATA FOR
HYDRAULIC TUBES AND FITTINGS
8
14
20
34
47
81
95
108
129
163
339
14
20
27
41
54
95
109
122
158
190
407
NEWTON
METERS
Min. Max.
9
12
21
35
53
77
90
110
140
160
225
12
15
24
40
53
82
100
120
150
175
240
FOOT
POUNDS
Min. Max.
6.4
7.9
9.5
12.7
15.9
19.1
22.2
25.4
31.8
38.1
50.8
4
5
6
8
10
12
14
16
20
24
32
1/4
5/16
3/8
1/2
5/8
3/4
7/8
1
1-1/4
1-1/2
2
7/16-20
1/2-20
9/16-18
3/4-18
7/8-14
1-1/16-12
1-3/16-12
1-5/16-12
1-5/8-12
1-7/8-12
2-1/2-12
12
16
29
47
72
104
122
149
190
217
305
16
20
33
54
79
111
136
163
204
237
325
6
10
15
25
35
60
70
80
95
120
250
10
15
20
30
40
70
80
90
115
140
300
TUBE NUTS
FOR 37°FLARED FITTINGS
O RING BOSS PLUGS
ADJUSTABLE FITTING
LOCKNUTS, SWIVEL
JIC - 37°SEATS
TORQUE TORQUE
SIZE
TUBING
OD
THREAD
SIZE
NEWTON
METERS
FOOT
POUNDS
Min. Max.Min. Max.
mm In.
These torques are not recommended for tubes of
12.7 mm (1/2″) OD and larger with wall thickness of
0.889 mm (0.035″) or less. The torque is specified for
0.889 mm (0.035″) wall tubes on each application
individually.
Before installing and torquing 37°flared fittings,
clean the face of the flare and threads with a clean
solvent or Loctite cleaner and apply hydraulic sealant
Loctite no. 569 to the 37°flare and the threads.
Install fitting and torque to specified torque, loosen
fitting and retorque to specifications.

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-10
PIPE THREAD FITTING TORQUE
Before installing and tightening pipe fittings, clean
the threads with a clean solvent or Loctite cleaner
and apply sealant Loctite no. 567 for all fittings
including stainless steel or no. 565 for most metal
fittings. For high filtration/zero contamination sys-
tems use no. 545.
THREAD SIZE TORQUE (MAXIMUM)
1/8″-27 13 N⋅m (10 ft Ibs)
1/4″-18 16 N⋅m (12 ft Ibs)
3/8″-14 22 N⋅m (16 ft Ibs)
1/2″-14 41 N⋅m (30 ft Ibs)
3/4″-14 54 N⋅m (40 ft Ibs)
INSTALLATION OF ORFS (O RING FLAT
FACED) FITTINGS
When installing ORFS fittings thoroughly clean both
flat surfaces of the fitting, 1, and lubricate the O ring,
2, with light oil. Make sure both surfaces are aligned
properly. Torque the fitting to specified torque listed
throughout the repair manual.
IMPORTANT: If the fitting surfaces are not properly
cleaned, the O ring will not seal properly. If the fitting
surfaces are not properly aligned, the fittings may be
damaged and will not seal properly.
IMPORTANT: Always use genuine factory replace-
ment oils and filters to ensure proper lubrication and
filtration of engine and hydraulic system oils.
The use of proper oils, grease, and keeping the
hydraulic system clean will extend machine and
component life.
50011183
3

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-11
Tractor Requirements
The Model MDX71 disc mower is designed to fit trac-
tors with 540 RPM PTOs with standard ASAE Cate-
gory I three-point hitches.
The Models MDX81/91 disc mowers are designed to
fit tractors with 540 RPM PTOs with standard ASAE
category II three-point hitches.
The tractor must also have adjustable sway bars or
a means of locking the lower lift arms from moving
sideways.
For the MDX71 disc mower, the tractor front axle
weight should be 782 kg (1725 lbs.) or greater prior
to attaching the disc mower. This is for tractors with
a wheel base range of 78″to 84″. Add additional
weight if required to achieve 782 kg (1725 lbs.) or
greater.
The tractor must also be equipped with one remote
hydraulic circuit with a minimum of 104 bar (1500
PSI) and a maximum of 193 bar (2800 PSI).
The tractor should be 45-horsepower minimum for
the Model MDX71, 55-horsepower minimum for the
Model MDX81, and 60-horsepower for the Model
MDX91. Insufficient tractor horsepower may cause
stripping and poor cutting.
The tractor must have adequate ballasting, wheel
spacing, and tire spacing to be stable on hillsides.
Too small a tractor may create a stability concern
when mowing in hilly conditions.
CAUTION
A tractor with an enclosed cab is recommended
when operating a rotary disc cutting machine.

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-12
ATTACHING THE MOWER TO THE TRAC-
TOR
Attaching the mower to the tractor in preparation for
operation includes the following:
•Attaching the limit chains
•Attaching the mower to the tractor’s three-point
hitch
•Fitting the PTO to the tractor and attaching the
PTO
•Connecting the mower’s hydraulic system
•Removing the jack stand
•Adjusting the limit chains and height of the hitch.
Before attaching the mower’s three-point hitch for
some models, the hitch pins must be relocated from
side-to-side so that the alignment of the mower is
proper considering the tractor’s tread width.
Attachment of the limit chains to the mower hitch
differs on some models.
Attaching the Model MDX71
1. Clean all paint or rust from the hitch pins.
2. Attach the mower hitch limit chains.
•Attach a clevis, 1, to one end of the limit chain. At-
tach the clevis with a 1/2″x2″clevis pin to the lim-
it chain tab, 2, on each arm of the hitch. Secure
eachclevispinwitha1/8″x1″cotter pin.
20022137
12
4