Steiner MD448, MD472, MD460 Operator Manual & Illustrated Parts List
OWNER/OPERATOR’S MANUAL
& ILLUSTRA TED PARTS LIST
MODELS:
75-70855 MOWER DECK-48” MD448
75-70860 MOWER DECK-60" MD460
75-70865 MOWER DECK-72" MD472
WARNING: If incorrectly used this machine can cause severe injury . Those who use
and maintain this machine should be trained in its proper use, warned of its dangers
and should read the entire manual before attempting to set up, operate, adjust or
service the machine.
09-254B REV D
CALIFORNIA
Proposition 65 Warning
WARNING
Diesel engine exhaust and some of
its constituents are known to the State
of California to cause cancer, birth
defects and other reproductive harm.
Californie Proposition 65
Avertissement
Les échappements des moteurs diesel
et certains de leurs composés sont
reconnus par l’Etat de Californie pour
être cancérigènes, provoquer des
défauts congénitaux et d’autres dangers
en matière de reproduction.
California Advertencia
de la Proposicion 65
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.
AVERTISSEMENT
L’émission du moteur de ce matériel
contient des produits chimiques que
l’Etat de Californie considère être
cancérigènes, provoquer des défauts
congénitaux et d’autres dangers en
matière de reproduction.
ADVERTENCIA
El estado de California hace saber que
los gases de escape de los motores
diesel y algunos de sus componentes
producen cáncer, defectos de
nacimiento y otros daños en el
proceso de reproducción humana.
© 2003, TEXTRON INC
El estado de California hace saber
que los gases de escape de este
producto contienen productos
quÍmicos que producen cáncer,
defectos de nacimiento y otros daños
en el proceso de reproducción
humana.
ROTARY
MOWER
IMPORTANT MESSAGE
Thank you for purchasing this Jacobsen product. You have purchased a world class product, one of the best
designed and built anywhere.
This product comes with an Owner/Operator's Manual. The useful life and good service you receive from this
product depends to a large extent on how well you read and understand this manual. Treat this product properly
and adjust it as instructed, and it will give you many years of reliable service.
See a Jacobsen dealer for any service or parts needed. Jacobsen service ensures that you continue to receive
the best results possible from Jacobsen products. You can trust Jacobsen replacement parts because they are
manufactured with the same high precision and quality as the original parts.
Jacobsen designs and builds its equipment to serve many years in a safe and productive manner. For longest
life, use this product only as directed in the manual, keep it in good repair and follow safety warnings and
instructions. You'll always be glad you did.
Jacobsen, a Textron Company
One Bob Cat Lane
Johnson Creek, WI 53038-0469
TABLE OF CONTENTS FIGURES PAGE
INTRODUCTION ........................................................................................................................................... 2
SPECIFICATIONS ......................................................................................................................................... 3
SAFETY ...................................................................................................................................................... 4-7
DECALS ..................................................................................................................................................... 8, 9
ASSEMBLY INSTRUCTIONS ...................................................................................................................... 10
INSTALLATION .............................................................................................................................................11
OPERATION ................................................................................................................................................ 12
SERVICE ................................................................................................................................................ 13-17
DECK PARTS 48" .............................................. FIGURE 1 ................................................................. 18, 19
DECK PARTS 60" .............................................. FIGURE 2 ................................................................. 20, 21
DECK PARTS 72" .............................................. FIGURE 3 ................................................................. 22, 23
FRAME PARTS 48" ............................................ FIGURE 4 ................................................................. 24, 25
FRAME PARTS 60" ............................................ FIGURE 5 ................................................................. 26, 27
FRAME PARTS 72" ............................................ FIGURE 6 ................................................................. 28, 29
HITCH & DRIVE PARTS .................................... FIGURE 7 ................................................................. 30, 31
SPINDLE PARTS ............................................... FIGURE 8 ................................................................. 32, 33
FLIP-UP DECKS ................................................ FIGURE 9 ................................................................. 34, 35
9-2004
1
INTRODUCTION
ROTARY
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DESCRIPTION
A full-floating rotary mower deck is designed to fit all Steiner power units with the quick hitch front lift.
Three sizes match the power unit to the application. These decks are easy to attach and detach allowing
interchange with the many other front mounted attachments. The side discharge rotary mower provides
even distribution of clippings while the full-floating deck follows the contours of the terrain for an even cut
with cutting height controlled by the front caster wheels and full width rear roller. The deck can be safely
serviced and cleaned while still attached to the tractor. Convenient handles enable the deck to be lifted
vertically over 90 degrees so the blades are fully exposed. Exceptional visibility and maneuvering is
possible with this front mounted design mower.
NOTE: The flip-up deck feature was added
beginning with the following Serial Numbers:
75-70855 ----------------------- 1494
75-70860 ----------------------- 4728
75-70865 ----------------------- 1970
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ROTARY
SPECIFICATIONS
MOWER
SPECIFICATIONS
Model 75-70855 75-70860 75-70865
Overall Width with Chute: ......... 60-1/2" ......................... 73" ................................ 85"
Overall height:........................... 19" ............................... 19" ................................ 19"
Overall length:........................... 49-1/2" ......................... 48-3/4" ......................... 55"
Cutting Width: ...........................47" ............................... 59-3/8" ......................... 72"
Cutting Height: ..........................1" to 4-1/2". .................. 1" to 4-1/2" ...................1" to 4"
Blades: ...................................... 3 - 16-1/4" blades ........ 3 - 20-1/2" blades ........ 3 - 24-3/4" blades
Weight:...................................... 330 lbs. ........................ 360 lbs. ........................ 470 lbs.
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SAFETY
ROTARY
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NOTICE !!!
Unauthorized modifications may present extreme
safety hazards to operators and bystanders and
could also result in product damage.
Jacobsen, a Textron Company strongly warns
against, rejects and disclaims any modifications,
add-on accessories or product alterations that are
not designed, developed, tested and approved by
Jacobsen Engineering Department. Any Jacobsen
product that is altered, modified or changed in any
manner not specifically authorized after original
manufacture–including the addition of “after-market”
accessories or component parts not specifically
approved by Jacobsen–will result in the Jacobsen
Warranty being voided.
Any and all liability for personal injury and/or property
damage caused by any unauthorized modifications,
add-on accessories or products not approved by
Jacobsen will be considered the responsibility of
the individual(s) or company designing and/or
making such changes. Jacobsen will vigorously
pursue full indemnification and costs from any party
responsible for such unauthorized post-manufacture
modifications and/or accessories should personal
injury and/or property damage result.
This symbol means:
ATTENTION!
BECOME ALERT!
Your safety and the safety of others is involved.
Signal word definitions:
The signal words below are used to identify levels
of hazard seriousness. These words appear in this
manual and on the safety labels attached to
Jacobsen machines. For your safety and the safety
of others, read and follow the information given with
these signal words and/or the symbol shown above.
DANGER indicates an imminently hazardous
situation which, if not avoided, WILL result in death
or serious injury.
WARNING indicates a potentially hazardous
situation which, if not avoided, COULD result in
death or serious injury.
CAUTION indicates a potentially hazardous
situation which, if not avoided, MAY result in minor
or moderate injury. It may also be used to alert
against unsafe practices or property damage.
CAUTION used without the safety alert symbol
indicates a potentially hazardous situation which, if
not avoided, MAY result in property damage
MODEL NUMBER: This number appears on
sales literature, technical manuals and price
lists.
SERIAL NUMBER: This number appears only
on your mower. It contains the model number
followed consecutively by the serial number.
Use this number when ordering parts or seeking
warranty information.
4
ROTARY
SAFETY
MOWER
GENERAL SAFETY
1. Read and understand the Owner’s Manual before attempting to operate this machine.
2. Operate all controls from the operator’s seat, (if so equipped). NO RIDERS.
3. Keep all shields in place and safety switches adjusted properly.
4. Do not leave equipment unattended. Park on a level surface, set parking brake, STOP the engine and
remove the key.
5. Do not allow minors or the inexperienced to operate this machine.
6. Keep people and pets a safe distance away from machine using power driven attachments. Injury
could result from flying debris.
7. Do not attempt to work on unit or any attachments with engine running!
8. Wear all the necessary protective clothing and personal safety devices to protect your head, eyes,
ears, hands and feet. Operate the machine only in daylight or in good artificial light.
5
SAFETY
ROTARY
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IMPORTANT
Safe Operation Practices for
Mowers
This cutting machine is capable of amputating
hands and feet and throwing objects. Failure to
observe the following safety instructions could
result in serious injury or death.
I GENERAL OPERATION
• Read, understand, and follow all instructions
in the manual and on the machine before
starting.
• Only allow responsible adults, who are
familiar with the instructions, to operate the
machine.
• Clear the area of objects such as rocks, toys,
wire, etc., which could be picked up and
thrown by the blade.
• Be sure the area is clear of other people
before mowing. Stop the machine if anyone
enters the area.
• Do not operate the machine while under the
influence of alcohol or drugs.
• Watch for traffic when operating near or
crossing roadways.
• Use extra care when loading or unloading the
machine into a trailer or truck.
• Always wear safety goggles or safety glasses
with side shields when operating mower.
II SLOPE OPERATION
Slopes are a major factor related to
loss-of-control and tip-over accidents, which can
result in severe injury or death. All slopes
require extra caution. If you feel uneasy on it, do
not mow it.
DO:
• Mow up and down slopes, not across.
• Remove obstacles such as rocks, tree limbs,
etc.
• Never carry passengers.
• Do not mow in reverse unless absolutely
necessary. Always look down and behind
before and while backing.
• Be aware of the mower discharge direction
and do not point it at anyone. Do not operate
the mower without the discharge chute in
place.
• Slow down before turning.
• Never leave a running machine unattended.
Always turn off blades, set parking brake, stop
engine, and remove keys before dismounting.
• Turn off blades when not mowing.
• Stop engine before unclogging discharge
chute.
• Mow only in good light, keeping away from
holes and hidden hazards.
• Watch for holes, ruts, or bumps. Uneven
terrain could overturn the machine. Tall grass
can hide obstacles.
• Use slow speed on slopes.
• Follow the manufacturers recommendations
for wheel weights or counterweights to
improve stability.
• Use extra care with grass catchers or other
attachments. These can change the stability
of the machine.
• Keep all movement on the slope slow and
gradual. Do not make sudden changes in
speed or direction.
• Avoid stopping or starting on a slope. If tires
lose traction, disengage the blades and
proceed slowly straight down the slope.
6
ROTARY
MOWER
SAFETY
DO NOT:
• Do not turn on slopes unless necessary, and
then, turn slowly and gradually downhill, if
possible.
• Do not mow drop-offs, ditches, or
embankments. The mower could suddenly
turn over if a wheel is over the edge of a cliff
or ditch, or if an edge caves in.
• Do not mow on wet grass. Reduced traction
could cause sliding.
• Do not try to stabilize the machine by putting
your foot on the ground.
• Do not use grass catcher on steep slopes.
III CHILDREN
Tragic accidents can occur if the operator is not
alert to the presence of children. Children are
often attracted to the machine and the mowing
activity. Never assume that children will remain
where you last saw them.
IV SERVICE
• Use extra care in handling gasoline and other
fuels. They are flammable and the vapors are
explosive.
- Use only an approved container.
- Never remove gas cap or add fuel with
engine running. Allow engine to cool before
refueling.
- Do not smoke.
- Never add or drain fuel with machine
indoors.
- Never store the machine or fuel container
inside where there is an open flame, such
as in a water heater.
• Never run the machine in a closed area.
• Keep nuts and bolts, especially blade
attachment bolts, tight and keep equipment in
good condition.
• Never tamper with safety devices. Check their
proper operation regularly.
• Keep machine free of grass, leaves, and other
debris build-up. Clean up oil or fuel spillage.
Allow machine to cool before storing.
• Keep children out of the mowing area and
under the watchful eye of another responsible
adult.
• Be alert and turn machine off if children enter
the area.
• Before and when backing, look behind and
down for small children.
• Never carry children as passengers, even
with the blades off. They may suddenly fall
off and be seriously injured or interfere with
safe machine operation.
• Never allow children to operate the machine.
• Use extra care when approaching blind
corners, shrubs, trees, or other objects that
may obscure vision.
• Stop and inspect the equipment if you strike
an object. Repair, if necessary, before
re-starting.
• Never make adjustments or repairs with the
engine running.
• Discharge chute components are subject to
wear, damage, and deterioration, which could
expose moving parts or allow objects to be
thrown. Frequently check components and
replace with manufacturer’s recommended
parts, when necessary.
• Mower blades are sharp and can cut. Wrap
the blade(s) or wear gloves, and use extra
caution when servicing them.
• Check brake operation frequently (if
equipped). Adjust and service as required.
7
DECALS
ROTARY
MOWER
Location:
On mower deck, front center.
8
Location:
On mower deck and discharge chute.
ROTARY
MOWER
DECALS
Location:
On mower deck top front center and both sides.
Location:
On mower deck top shield.
9
ASSEMBLY INSTRUCTIONS
ROTARY
MOWER
1. Remove the mower from the shipping crate.
2. Remove top shield.
3. Install both left and right hitch arms as shown in Figure 7. Torque the 1/2" attaching bolts to 85 ft. lbs.
Serial Numbers:
75-70855: 1001-1493, 75-70860: 1001-4727, 75-70865: 1001-1969
Install the 1/2" locknut, which holds the two hitch arms together. Tighten and back off 1/2 turn. This
allows some independent movement of the hitch arms.
Serial Numbers:
75-70855: 1494 & Up, 75-70860: 4728 & Up, 75-70865: 1970 & Up
Install the 1/2" nut and the 1/2" lockwasher, which holds the two hitch arms together. Torque to 85 ft. lbs.
4. Be sure that the mower main drive belt is installed correctly on all pulleys. Check spring-loaded idler
arm position. Choose a mounting hole in the deck which allows the idler arm to lean toward the drive
shaft, with the spring attached. Fasten spring to chain and idler arm as shown on Page 16.
Serial Numbers:
75-70855: 1001-1493, 75-70860: 1001-4727, 75-70865: 1001-1969
Choose a chain link that stretches spring to an overall length of 8-9 inches.
Serial Numbers:
75-70855: 1494 & Up, 75-70860: 4728 & Up, 75-70865: 1970 & Up
Choose a chain link that stretches spring approximately 1" on 75-70860 or 1-1/2" on 75-70855 &
75-70865.
5. Check bolts mounting spindles to the deck. Torque should be 35-40 ft. lbs.
6. Check blade bolts. Torque should be 75 - 85 ft. lbs.
7. Check 1/4" cap screws on pulley bushings (Figure 1, Item 9). Torque should be 95 inch pounds.
Tighten these cap screws in alternating sequence 10-12 times to assure equal torque on all cap
screws.
8. Reinstall the top shield.
9. Remove 1/2" locknut on height adjustment lever and position correctly as shown on Page 12. Replace
locknut.
10. Remove the drive pulley shield and install the proper drive belt for the power unit. Replace shield.
11. Attach mower to power unit. See Page 11 for installation instructions. See Pages 6 & 7 for safety
instructions and Page 12 for operating instructions.
10
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