Case IH MD72 Manual de usuario

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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

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

36091676

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

19986837

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

36091678

36091677

609 mm (24 in)

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

A3680-17

36091679

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