Case IH MD72 User manual

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SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-1
SECTION 00 -- GENERAL INFORMATION
Chapter 1 -- General Information
CONTENTS
Section Description Page
Precautionary Statements 2.......................................................
General Information 3............................................................
Before Using the New Machine 3...............................................
After 8 Hours of Operation 3................................................
Tractor Requirements 4....................................................
Attaching the Mower to the Tractor 5............................................
Model MD72 5............................................................
Attaching the Mower to the Tractor 9............................................
Model MD82 and MD92 9..................................................
Lowering the Cutter Bar for Field Operation 15...................................
Transporting the Mower 16....................................................
Removing the Mower from the Tractor 16.......................................
Storing the Mower 18........................................................
Specifications 19................................................................

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.
M1169
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.
M1170
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.
M1171
FAILURE TO FOLLOW THE “DANGER”, “WARNING”, AND “CAUTION” INSTRUCTIONS MAY RESULT IN
DEATH OR SERIOUS BODILY INJURY.
MACHINE SAFETY
The precautionary statement (“NOTICE”) is followed by specific instructions. This statement is intended for
machine safety.
NOTICE: The word “NOTICE” 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
NOTICE: Instructions used to identify and present supplementary information.
ASAE S441.3 FEB04
ISO 11684
VERSION -- FEB ’08

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-3
GENERAL INFORMATION
DANGER
To prevent injury to bystanders, this mower is
not intended for roadside or municipal mowing.
This mower is intended for agricultural use only.
Failure to comply will result in death or serious
injury.
M1215
On Case IH equipment, left and right are determined
by standing behind the unit, looking in the direction of
travel.
The serial number plate, 1, for the Models MD72,
MD82, and MD92 is located on the left side of the
main frame. Record this serial number in the space
listed below.
Serial Number:_____________________
Give your dealer the model and serial number of your
disc mower when ordering parts. Always order
genuine Case IH parts from your Case IH dealer.
36091676
1
1
BEFORE USING THE NEW MACHINE
1. Thoroughly read and understand this manual.
Pay particular attention to all safety precautions.
2. Check all grease fittings and the gearbox oil levels
to insure the machine has been lubricated as
recommended in this manual.
3. Check all adjustments to insure they have been
made as detailed in the “Maintenance” section of
this manual.
After 8 Hours Of Operation
1. Check for loose hardware and tighten any loose
bolts.
2. Visually check the entire cutter bar for leakage
and correct any leakage before operation.
3. Check mower drive belts for correct tension, and
readjust as required.

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-4
Tractor Requirements
The Model MD72 disc mower is designed to fit
tractors with 540 rpm PTOs with standard ASAE
Category I 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 MD72 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 inch to 84 inch. 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 MD72, 55-horsepower minimum for the
Model MD82, and 60-horsepower for the Model
MD92. 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.
WARNING
A tractor with an enclosed cab is recommended
when operating a rotary disc cutting machine.
Failure to comply could result in death or serious
injury.
M1183

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-5
ATTACHING THE MOWER TO THE
TRACTOR
Model MD72
1. Clean all paint or rust from the hitch pins.
2. Attach the plate on the end of the check chains to
the outer end of frame hitch pins, 1, as required to
clear obstructions on the tractor. Install the check
chain plates before attaching the tractor lower
links.
3. Back the tractor to the mower and attach the lower
links, 2, to the outer end of the frame hitch pins.
Secure the links with linchpins. Install the
linchpins from the top down.
4. Attach the top link to the tractor, 1, using the pin
provided with the tractor top link.
5. Attach the top link to the mower, 2, in the front hole
using the pin provided with the mower.
NOTICE: If necessary, the top link may be mounted
in the rear hole on the mower to allow greater top link
length range.
6. Attach the check chain plates to the tractor at a
top link mounting position, 3, with the pin
provided.
NOTICE: If the check chains interfere with or could
damage the tractor PTO shield, relocate the check
chain plates to the opposite end of the mower frame
hitch pins, or attach to a different location on the tractor.
NOTICE: It may be necessary to position the tractor
drawbar to the side or remove it to prevent interfer-
ence with the check chains or PTO shaft.
19986827A
21
1
2
2
36091676
2
1
3
3

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-6
7. The PTO assembly must be fitted to the tractor
being used. The tubes must overlap at least 102
mm (4 in). At the same time, the tubes, 1 and 2,
must be short enough so they do not bottom out.
The assembly must also be long enough so it
does not pull apart when the breakaway system,
1, operates.
NOTICE: Most tractors will not require the PTO to be
shortened.
Separate the front and rear PTO shafts. Connect
the front half to the tractor PTO and the rear half to
the disc mower input shaft. Raise and lower the
machine to find the position where the PTO would
be the shortest. Hold the shafts side by side and
mark the length to provide 10 mm (3/8 in)
clearance between the end of the shafts and the
yoke.
Measure how much is to be cut from your marks.
Cut off an equal length from the front and rear
plastic shield. Shorten the PTO telescoping
shafts the same amount as the plastic shields.
NOTICE: Remove the grease sleeve from the rear
half of the PTO shaft before shortening the tube.
Remove the burrs from the shaft ends with a file or
grinder. Clean out the metal chips and filings.
Apply grease to the inside of the outer telescoping
tube before assembly. Reinstall the grease
sleeve on the end of the rear half of the PTO shaft.
Check to be sure the shafts do not bottom out, and
operate the breakaway to be sure they do not
come apart.
36091676 2
1
4
19986837
1
5

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-7
8. Attach the PTO assembly to the tractor.
9. Connect the hydraulic hose to the tractor,
preferably to a valve section with a float position.
Select the appropriate port to allow engaging the
float position when lowering.
NOTICE: Check the tractor operator’s manual for
instructions on which outlet to use for single acting
cylinders.
10. Raise the mower with the tractor three-point hitch.
Remove pin, 2, and remove the jack stand, 1.
Attach the jack stand to the mower frame by
sliding the jack stand slots over lugs, 3, on the
frame.
NOTICE: The pin which is attached to the jack stand
with a cable will be installed in the flotation system later.
11. Level the tractor lower lift links from side to side.
Adjust and lock the sway bars or whatever system
the tractor has to remove as much side
movement as possible.
NOTICE: The tractor lower links should be posi-
tioned straight behind the tractor, or have minimal off-
set. Excessive offset in either direction may cause
damage to the mower PTO drive shaft due to exces-
sive operating angles or contact with hitch pins, and
will also put “lead” or “lag” into the cutter bar resulting
in reduced cutting width and breakaway perfor-
mance.
Adjust the limit chain length so the hitch pins, 1,
are as close to (but not less than) 609 mm (24 in)
as possible from the ground when the mower is
supported by the limit chains.
NOTICE: If the high stubble kit is installed on the
mower, adjust frame height to 660 mm (26 in) from
ground in order to provide adequate flotation.
36091676
6
36091678
2
1
3
7
36091677
1
609 mm (24 in)
8

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-8
12. Fold the front half of the cutter bar curtain, 1,
rearward. Secure the curtain with the rubber tie
strap, 2. Flip the cutter bar up-stop channel, 3,
toward the cutter bar and against the brace.
13. Raise the cutter bar with the tractor hydraulics.
Raise it high enough to engage the transport
latch, 1.
NOTICE: Before raising the cutter bar with the hy-
draulic cylinder, make sure there is adequate clear-
ance between the machine and the tractor. The top
link may have to be lengthened for the cutter bar to
clear the cab.
14. Install the pin, 1, which is attached to the jack
stand, 2, in the upper flotation spring rod at 3. The
pin has two detent balls and is properly installed
when detents are on either side of the flotation
spring rod.
NOTICE: If the pin is inserted too far, the retaining
ring may be knocked off and the pin may be lost,
causing loss of flotation.
19986836
1
9
A3680-17
1
10
36091679
1
3
2
11

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-9
ATTACHING THE MOWER TO THE
TRACTOR
Models MD82 and MD92
Prior to installing the mower onto the tractor, the
mower must be adjusted to match the tractor.
Depending on the size of the tractor and the wheel
spacing, it may be necessary to move the
hex-shaped lower lift pins, 1.
NOTICE: Ideally a 102 mm (4 in) clearance should be
held between the outside edge of the tractor tire and
the mower inner shield for a full cut of the cutter bar
at all times.
The hex-shaped hitch pins mounted on the bottom of
the main frame arms can be moved to position the
mower behind the tractor for different tread widths. To
do this, loosen the four clamp bolts, 1, on each main
frame arm until the hitch pins can be moved.
Retighten the clamp bolts evenly so that both sides of
the clamp block, 2, have equal clearance to the main
frame arm.
NOTICE: Always position the hitch pins so that the
long round pin is towards the outside of the main
frame. Do not position the long round pins inside the
main frame, or damage to the mower PTO drive shaft
could occur.
A3680-2
1
12
A3679-6
4in
(102 mm)
13
A3679-26 1
2
14

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-10
Measure from the center of the tractor to the right side
of the right tire.
For tractors that measure 940 mm (37 in) or less,
position both hitch pins to the right so that only the
round pin protrudes on the left side of the main frame
arms. This will position the mower towards the left,
moving the cutter bar closer to the right side tractor
tire.
NOTICE: The tractor lower link arms may need to be
offset slightly to the left to prevent the mower PTO
shaft from contacting the inner end of the left hitch
pin.
For tractors that measure 1016 mm (40 in), center
the hitch pins in the main frame arm.
For tractors that measure 1092 mm (43 in), position
the hitch pins to the left so that only the round pin
protrudes on the right side of the main frame arms.
This will position the mower towards the right, away
from the right side tractor tire.
NOTICE: The tractor lower link arms may need to be
offset slightly to the right to prevent the mower PTO
shaft from contacting the inner end of the right hitch
pin.
For tractors that measure more than 1092 mm (43
in), the tractor lower link arm sway bars or check
chains can be adjusted to further offset the mower to
the right, or the right side tire should be moved
inward.
NOTICE: The tractor lower links should be posi-
tioned straight behind the tractor, or have minimal off-
set. Excessive offset in either direction may cause
damage to the mower PTO drive shaft due to exces-
sive operating angles or contact with hitch pins,
and will also put “lead” or “lag” into the cutter bar
resulting in reduced cutting width and breakaway
performance.
15
16
17

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-11
1. Clean all paint or rust from the hitch pins.
2. Attach the plate on the end of the check chains to
the inner or outer end of frame hitch pins, 1, as
required to clear obstructions on the tractor. If
installing on the outer end of the hitch pins, install
the check chain plates before attaching the
tractor lower links.
3. Back the tractor to the mower and attach the lower
links, 2, to the outer end of the frame hitch pins.
Secure the links with linchpins. Install the
linchpins from the top down.
NOTICE: Attach the tractor lower links to the outside
pins only; do not attach the lower links to the pins in-
side the mower frame or damage to the mower PTO
drive shaft could occur.
4. Attach the top link to the tractor, 1, using the pin
provided with the tractor top link.
5. Attach the top link to the mower, 2, in the front hole
using the pin provided with the mower.
NOTICE: If necessary, the top link may be mounted
in the rear hole on the mower to allow greater top link
length range.
6. Attach the check chain plates to the tractor at a
top link mounting position, 3, with the pin
provided.
NOTICE: If the check chains interfere with or could
damage the tractor PTO shield, relocate the check
chain plates to the opposite end of the mower frame
hitch pins, or attach to a different location on the trac-
tor.
NOTICE: It may be necessary to position the tractor
drawbar to the side or remove it to prevent interfer-
ence with the check chains or PTO shaft.
600-1-1
11
22
18
A3680-13r
2
3
1
19

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-12
7. The PTO assembly must be fitted to the tractor
being used. The tubes must overlap at least 102
mm (4 in). At the same time, the tubes, 1 and 2,
must be short enough so they do not bottom out.
The assembly must also be long enough so it
does not pull apart when the breakaway system,
2, operates.
NOTICE: Most tractors will not require the PTO to be
shortened.
Separate the front and rear PTO shafts. Connect
the front half to the tractor PTO and the rear half to
the disc mower input shaft. Raise and lower the
machine to find the position where the PTO would
be the shortest. Hold the shafts side by side and
mark the length to provide 10 mm (3/8 in)
clearance between the end of the shafts and the
yoke.
Measure how much is to be cut from your marks.
Cut off an equal length from the front and rear
plastic shield. Shorten the PTO telescoping
shafts the same amount as the plastic shields.
NOTICE: Remove the grease sleeve from the rear
half of the PTO shaft before shortening the tube.
Remove the burrs from the shaft ends with a file or
grinder. Clean out the metal chips and filings.
Apply grease to the inside of the outer telescoping
tube before assembly. Reinstall the grease
sleeve on the end of the rear half of the PTO shaft.
Check to be sure the shafts do not bottom out, and
operate the breakaway to be sure they do not
come apart.
A3680-13r
1
2
20
A3679-35
1
2
21

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-13
8. Attach the PTO assembly to the tractor.
9. Connect the hydraulic hose to the tractor,
preferably to a valve section with a float position.
Select the appropriate port to allow engaging the
float position when lowering.
NOTICE: Check the tractor operator’s manual for
instructions on which outlet should be used for single
acting cylinders.
10. Raise the mower with the tractor three-point hitch.
Remove pin, 2, and remove the jack stand, 1.
Attach the jack stand to the mower frame by
sliding the jack stand slots over lugs, 3, on the
frame.
NOTICE: The pin which is attached to the jack stand
with a cable will be installed in the flotation system
later.
11. Level the tractor lower lift links from side to side.
Adjust and lock the sway bars or whatever system
the tractor has to remove as much side
movement as possible.
NOTICE: The tractor lower links should be posi-
tioned straight behind the tractor, or have minimal off-
set. Excessive offset in either direction may cause
damage to the mower PTO drive shaft due to
excessive operating angles or contact with hitch
pins, and will also put “lead” or “lag” into the cutter bar
resulting in reduced cutting width and breakaway
performance.
Adjust the limit chain length so the hitch pins, 1,
are as close to (but not less than) 457 mm (18 in)
as possible from the ground when the mower is
supported by the limit chains.
NOTICE: If the high stubble kit is installed on mower,
adjust frame height to 508 mm (20 in) from ground in
order to provide adequate flotation.
A3679-34
1
2
3
22
A3680-12R
1
18 in
(457 mm)
23

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-14
12. Fold the front half of the cutter bar curtain, 1,
rearward. Secure the curtain with the rubber tie
strap, 2. Flip the cutter bar up-stop channel, 3,
toward the cutter bar and against the brace.
13. Raise the cutter bar with the tractor hydraulics.
Raise it high enough to engage the transport
latch, 1.
NOTICE: Before raising the cutter bar with the hy-
draulic cylinder, make sure there is adequate clear-
ance between the machine and the tractor. The top
link may have to be lengthened for the cutter bar to
clear the cab.
14. Install the pin which is attached to the jack stand,
2, in the upper flotation spring rod at 1. The pin
has two detent balls and is properly installed
when detents are on either side of the flotation
spring rod.
NOTICE: If the pin is inserted too far, the retaining
ring may be knocked off and the pin may be lost,
causing loss of flotation.
A3680-20r
3
1
2
24
A3680-17
1
25
A3679-32r
1
2
26

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-15
LOWERING THE CUTTER BAR FOR FIELD
OPERATION
NOTICE: Be sure the flotation pin, 1, is installed in
the spring rod.
NOTICE: Be sure the limit chains are attached and
adjusted as explained earlier.
1. Put tension on the transport latch release rope, 2.
Raise or lower the lift cylinder with the tractor
hydraulics until the latch can be released.
2. Lower the mower into the operating position and
position the tractor valve in the float position. This
will allow the mower to follow the ground properly.
Be sure the up-stop channel, 2, is positioned over
the lift cylinder rod to limit lift height while the
curtain is down.
3. Unhook the curtain transport tie-down strap, 1,
and fold the curtain forward into the mowing
position.
WARNING
Never operate the mower with the curtain folded
rearward in the transport position. Failure to
comply could result in death or serious injury.
M1210
A3679-32r
1
2
27
A3680-20r
12
28

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-16
TRANSPORTING THE MOWER
1. Fold the front half of the cutter bar curtain, 1,
rearward. Secure the curtain with the rubber tie
strap, 2. Flip the cutter bar up-stop channel, 3,
toward the cutter bar and against the brace.
2. Raise the cutter bar with the tractor hydraulics.
Raise it high enough to engage the transport
latch, 1.
NOTICE: Before raising the cutter bar with the hy-
draulic cylinder, make sure there is adequate clear-
ance between the machine and the tractor. The top
link may have to be lengthened for the cutter bar to
clear the cab.
REMOVING THE MOWER FROM THE
TRACTOR
1. Fold the front half of the cutter bar curtain, 1,
rearward. Secure the curtain with the rubber tie
strap, 2. Flip the cutter bar up-stop channel, 3,
toward the cutter bar and against the brace.
A3680-20r
3
1
2
29
A3680-17
1
30
A3680-20r
3
1
2
31

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-17
2. Raise the cutter bar with the tractor hydraulics.
Raise it high enough to engage the transport
latch, 1.
NOTICE: Before raising the cutter bar with the hydraulic
cylinder, make sure there is adequate clearance be-
tween the machine and the tractor. The top link may
have to be lengthened for the cutter bar to clear the cab.
3. Remove the flotation spring pin, 1, from the spring
rod.
WARNING
Disconnect the flotation system before attempt-
ing to remove the implement from the tractor.
Failure to disconnect the flotation system could
result in sudden movement, causing bodily inju-
ry. Failure to comply could result in death or seri-
ous injury.
M1496
4. Remove the jack stand, 2, from the storage
position.
5. Raise the tractor three-point hitch high enough to
install the jack, 1, in the lift frame mount and install
thepin,2,tosecureit.
6. Disconnect the limit chains, 3, from the rear of the
tractor.
7. Lower the cutter bar to the ground in the mowing
position and lower the tractor three- point hitch so
the mower frame is sitting on the jack as shown.
8. Loosen, unlock, or remove the tractor sway bars
or equivalent.
9. Disconnect the three-point hitch arms from the lift
links, 4, and top link, 5, from the mower.
10. Disconnect the hydraulic hose, transport latch
rope, and PTO from the tractor.
A3680-17
1
32
A3679-32r
1
2
33
36091680
1
2
3
4
5
34

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-18
STORING THE MOWER
1. Clean the mower. Grease all fittings.
2. Drain the oil from the bevel gearbox and all
modules and refill with new, clean oil to the correct
level. Run the mower for a few minutes.
3. Store the cutter bar in the operating position.
4. Remove the drive belt and store it in a dry place.
5. Clean the cutter bar rusted area and touch up with
Case IH paint. Spray cans are available from your
Case IH dealer.