Scag STT61V-27DFI-SS, STT-35BVAC-SS, STT61V-35BVAC-SS User Manual

OPERATOR’S MANUAL

Turf Tiger

Models: STT52V-27CH STT61V-27CH STT61V-27KA STT61V-29DFI-SS STT61V-35BVAC-SS STT-29DFI-SS

Congratulations on owning a Scag mower! This manual contains the operating instructions and safety information for your Scag mower. Reading this manual can provide you with assistance in maintenance and adjustment procedures to

keep your mower performing to maximum efciency. The specic models that

this book covers are listed on the inside cover. Before operating your machine, please read all the information enclosed.

STT-35BVAC-SS

PART NO. 03248 Rev.2

PRINTED 9/2008

PRINTED IN USA

WARNING

FAILURE TO FOLLOW SAFE OPERATING PRACTICES MAY RESULT IN

SERIOUS INJURY OR DEATH.

Read this manual completely as well as other manuals that came with your mower.• DO NOT operate on steep slopes. To check a slope, attempt to back up it (with the •

cutter deck down). If the machine can back up the slope without the wheels slipping, reduce speed and use extreme caution.

Under no circumstances should the machine be operated on slopes greater than 15 • degrees. ALWAYS FOLLOW OSHA APPROVED OPERATION.

DO NOT mow on wet grass. Wet grass reduces traction and steering control.• Keep all shields in place, especially the grass discharge chute.• Before performing any maintenance or service, stop the machine and remove the •

spark plug wire and ignition key. If a mechanism becomes clogged, stop the engine before cleaning.• Keep hands, feet and clothing away from power-driven parts.• Keep others off the mow• er (only one person at a time)

REMEMBER - YOUR MOWER IS ONLY AS SAFE AS THE OPERATOR!

HAzARD CONTROL AND ACCIDENT PREvENTION ARE DEPENDENT UPON THE AWARENESS, CONCERN, PRUDENCE, AND PROPER TRAINING OF THE PERSONNEL INvOLvED IN THE OPERATION, TRANSPORT, MAINTENANCE, AND STORAGE OF THE EqUIPMENT.

This manual covers the operating instructions and illustrated parts list for:

STT52v-27CH with a serial number of D7400001 to D7499999 STT61v-27CH with a serial number of D7500001 to D7599999 STT61v-27KA with a serial number of E4200001 to E4299999

STT61v-29DFI-SS with a serial number of E3900001 to E3999999

STT61v-35BvAC-SS with a serial number of E5400001 to E5499999

STT-29DFI-SS with a serial number of E4000001 to E4099999

STT-35BvAC-SS with a serial number of E5500001 to E5599999

SMT-52v with a serial number of D9400001 to D9499999

SMT-61v with a serial number of D9500001 to D9599999 SMT-72vS with a serial number of E3400001 to E3499999 SMST-72A with a serial number of E0000001 to E0099999

Always use the entire serial number listed on the serial number tag when referring to this product.

Table of Contents

GENERAL INFORMATIONSECTION 1 - ...................................................................................1

1.1 INTRODUCTION ...........................................................................................................................................1

1.2 DIRECTION REFERENCE ...........................................................................................................................1

1.3 SERvICING THE ENGINE AND DRIvE TRAIN COMPONENTS .................................................................1

1.4 SYMBOLS ....................................................................................................................................................2

SAFETY INFORMATIONSECTION 2 - ......................................................................................3

2.1 INTRODUCTION ...........................................................................................................................................3

2.2 SIGNAL WORDS ..........................................................................................................................................3

2.3 BEFORE OPERATION CONSIDERATIONS ................................................................................................3

2.4 OPERATION CONSIDERATIONS ................................................................................................................4

2.5 ROLL-OvER PROTECTION SYSTEM .........................................................................................................6

2.6 MAINTENANCE CONSIDERATIONS & STORAGE ....................................................................................8

2.7 USING A SPARK ARRESTOR .....................................................................................................................8

2.8 SAFETY AND INSTRUCTIONAL DECALS .................................................................................................9

SPECIFICATIONSSECTION 3 - ..............................................................................................10

3.1 ENGINE ......................................................................................................................................................10

3.2 ELECTRICAL .............................................................................................................................................10

3.3 POWER HEAD ...........................................................................................................................................11

3.4 CUTTER DECK ..........................................................................................................................................11

3.5 HYDRAULIC SYSTEM ...............................................................................................................................12

3.6 WEIGHTS AND DIMENSIONS ...................................................................................................................12

3.7 PRODUCTIvITY .........................................................................................................................................12

OPERATING INSTRUCTIONSSECTION 4 - ...........................................................................13

4.1 CONTROLS AND INSTRUMENT IDENTIFICATION ................................................................................13

4.2 SAFETY INTERLOCK SYSTEM ................................................................................................................14

4.3 INITIAL RUN-IN PROCEDURES ................................................................................................................15

4.4 STARTING THE ENGINE ...........................................................................................................................15

4.5 GROUND TRAvEL AND STEERING .........................................................................................................15

4.6 ENGAGING THE DECK DRIvE (CUTTER BLADES) ................................................................................16

4.7 HILLSIDE OPERATION ..............................................................................................................................17

4.8 PARKING THE MOWER .............................................................................................................................17

4.9 AFTER OPERATION ..................................................................................................................................17

4.10 REMOvING CLOGGED MATERIAL ........................................................................................................17

4.11 MOvING MOWER WITH ENGINE STOPPED ..........................................................................................18

4.12 RECOMMENDATIONS FOR MOWING ....................................................................................................18

4.13 ADJUSTING CUTTING HEIGHT ..............................................................................................................18

4.14 ADJUSTING THE STEERING LEvERS ...................................................................................................19

4.15 ADJUSTING THE HEIGHT ADJUST PEDAL ..........................................................................................19

4.16 TOWING (OPTIONAL HITCH ACCESSORY)...........................................................................................20

Table of Contents

TROUBLESHOOTING CUTTING CONDITIONSSECTION 5 - ...............................................21

ADJUSTMENTSSECTION 6 -

6.1 PARKING BRAKE ADJUSTMENT ............................................................................................................24

6.2 TRAvEL ADJUSTMENTS ..........................................................................................................................25

6.3 THROTTLE CONTROL AND CHOKE ADJUSTMENTS ............................................................................26

6.4 BELT ADJUSTMENT .................................................................................................................................26

6.5 BELT ALIGNMENT .....................................................................................................................................27

6.6 CUTTER DECK ADJUSTMENTS ..............................................................................................................27

6.7 CUSTOM-CUT BAFFLE ADJUSTMENT ...................................................................................................28

6.8 ELECTRIC CLUTCH ADJUSTMENT .........................................................................................................31

.................................................................................................24

MAINTENANCESECTION 7 - ..................................................................................................32

7.1 MAINTENANCE CHART - RECOMMENDED SERvICE INTERvALS ......................................................32

7.2 LUBRICATION ............................................................................................................................................33

7.3 HYDRAULIC SYSTEM ...............................................................................................................................35

7.4 ENGINE OIL ...............................................................................................................................................36

7.5 ENGINE FUEL SYSTEM ............................................................................................................................36

7.6 ENGINE AIR CLEANER .............................................................................................................................37

7.7 BATTERY ....................................................................................................................................................38

7.8 DRIvE BELTS .............................................................................................................................................39

7.9 CUTTER BLADES ......................................................................................................................................39

7.10 TIRES ........................................................................................................................................................40

7.11 CUTTER DECK GEARBOx .....................................................................................................................40

7.12 COOLING SYSTEM .................................................................................................................................41

7.13 BODY, DECK, AND UPHOLSTERY .........................................................................................................42

ILLUSTRATED PARTS LISTSECTION 8 - ..............................................................................43

8.1 SCAG APPROvED ATTACHMENTS AND ACCESSORIES......................................................................43

52v CUTTER DECK .........................................................................................................................................44

61v & 72vS CUTTER DECKS .........................................................................................................................46

72A CUTTER DECK CUTTER DECK CONTROLS

SHEET METAL COMPONENTS ......................................................................................................................52

STT ROLL-OvER PROTECTION SYSTEM - WITHOUT SUSPENSION SEAT ...............................................54

STT ROLL-OvER PROTECTION SYSTEM - WITH SUSPENSION SEAT ......................................................56

DECK DRIvE COMPONENTS .........................................................................................................................58

ENGINE AND ATTACHING PARTS - KOHLER

ENGINE & ATTACHING PARTS - 27HP, 29DFI KAWASAKI & 35BvAC ........................................................62

BRAKE AND STEERING COMPONENTS

FUEL AND HYDRAULIC SYSTEM ..................................................................................................................66

FUEL AND HYDRAULIC SYSTEM - 29DFI KAWASAKI BDP-16A HYDRAULIC PUMP ASSEMBLY

BDP-16A HYDRAULIC PUMP ASSEMBLY WITH COOLING FAN(29DFI & 35BvAC)) .................................72

.........................................................................................................................................48

...........................................................................................................................50

...............................................................................................60

......................................................................................................64

.................................................................................68

.....................................................................................................70

Table of Contents

ELECTRICAL SYSTEM (KOHLER & BRIGGS & STRATTON).......................................................................74

ELECTRICAL SYSTEM - 27HP KAWASAKI ...................................................................................................76

ELECTRICAL SYSTEM - 29DFI KAWASAKI ..................................................................................................78

REPLACEMENT DECALS AND INFORMATION PLATES .............................................................................80

STT ELECTRICAL SCHEMATIC (KOHLER) ELECTRICAL SCHEMATIC - 29DFI KAWASAKI

STT ELECTRICAL SCHEMATIC (35BvAC BRIGGS & STRATTON) .............................................................85

LIMITED WARRANTY - COMMERCIAL EqUIPMENT .........................Following Section 8

...................................................................................................82

............................................................................................84

III

Section 1

SERIAL NUMBER PLATE LOCATION

MODEL

SERIAL

Division of Metalcraft of Mayville, Inc.

Mayville, Wisconsin 53050

Patents Issued and Pending

MANUFACTURED UNDER ONE OR MORE

OF THE FOLLOWING PATENTS:

PATENTS PENDING

4,487,006

4,885,903

4,920,733

4,967,543

4,991,382

4,998,948

5,118,617

5,826,416

5,832,708

5,865,018

GENERAL INFORMATION

INTRODUCTION1.1

Your mower was built to the highest standards in the industry. However, the prolonged life and maximum efficiency of your mower depends on you following the operating, maintenance and adjustment instructions in this manual.

If additional information or service is needed, contact your Scag Power Equipment Dealer.

We encourage you to contact your dealer for repairs. All Scag dealers are informed of the latest methods to service this equipment and provide prompt and efficient service in the field or at their service shop. They carry a full line of Scag service parts.

- IMPORTANT -

The replacement of any part on this product by other than the manufacturer's authorized replacement part may adversely affect the performance, durability or safety of this product.

USE ONLY SCAG APPROvED ATTACHMENTS AND ACCESSORIES.

Attachments and accessories manufactured by companies other than Scag Power Equipment are not approved for use on this machine. See Section 8-1.

WARNING

For pictorial clarity, some illustrations and ﬁgures in this manual may show shields, guards or plates open or removed. Under no circumstances should your mower be operated without these devices in place.

All information is based upon product information available at the time of approval for printing. Scag Power Equipment reserves the right to make changes at any time without notice and without incurring any obligation.

DIRECTION REFERENCE1.2

When ordering parts, always give the model and serial number of your mower. The serial number plate is located between the seat and the controls where shown in Figure 1-1.

Use of other than original Scag replacement parts will void the warranty.

Mower Serial Number Plate LocationFigure 1-1.

The “Right” and “Left”, “Front” and “Rear” of the machine are referenced from the operator’s right and left when seated in the normal operating position and facing the forward travel direction.

SERvICING THE ENGINE AND DRIvE 1.3

TRAIN COMPONENTS

The detail servicing and repair of the engine, hydraulic pumps and gearboxes are not covered in this manual; only routine maintenance and general service instructions are provided. For service of these components during the limited warranty period, it is important to contact your Scag dealer or find a local authorized servicing agent of the component manufacturer. Any unauthorized work done on these components during the warranty period may void your warranty.

SYMBOLS1.4

48071S

481039S

SYMBOL DESCRIPTION SYMBOL DESCRIPTION

Choke

Transmission

Section 1

Parking Brake

On/Start

Off/Stop

Falling Hazard

Fast

Continuously Variable - Linear

Spinning Blade

Spring Tension on Idler

Oil

Thrown Object Hazard

Slow

Cutting Element - Basic Symbol

Pinch Point

Hour meter/Elapsed Operating Hours

STT MODELS

Cutting Element - Engage

Cutting Element - Disengage

CE Mark

Seat must be installed under the seat hold down bracket during installation. Failure to secure the seat under the hold down bracket could result in serious injury or death in a roll over.

Thrown Object Hazard

Read Operator's Manual

Keep Bystanders Away

Section 2

SAFETY INFORMATION

INTRODUCTION2.1

Your mower is only as safe as the operator. Carelessness or operator error may result in serious bodily injury or death. Hazard control and accident prevention are dependent upon the awareness, concern, prudence, and proper training of the personnel involved in the operation, transport, maintenance and storage of the equipment. Make sure every operator is properly trained and thoroughly familiar with all of the controls before operating the mower. The owner/user can prevent and is responsible for accidents or injuries occurring to themselves, other people or property.

DANGER

The signal word “DANGER” denotes that an extremely hazardous situation exists on or near the machine that could result in high probability of death or irreparable injury if proper precautions are not taken.

WARNING

READ THIS OPERATOR’S MANUAL BEFORE ATTEMPTING TO START YOUR MOWER.

A replacement manual is available from your authorized Scag Service Dealer or by contacting Scag Power Equipment, Service Department at P.O. Box 152, Mayville, WI 53050 or contact us via the Internet at www.scag.com. The manual for this machine can be downloaded by using the model and serial number or use the contact form to make your request. Please indicate the complete model and serial number of your Scag product when requesting replacement manuals.

SIGNAL WORDS2.2

This symbol means “Attention! Become Alert! Your Safety is Involved!" The symbol is used with the following

signal words to attract your attention to safety messages found on the decals on the machine and throughout this manual. The message that follows the symbol contains important information about safety. To avoid injury and possible death, carefully read the message! Be sure to fully understand the causes of possible injury or death.

SIGNAL WORD:

The signal word “WARNING” denotes that a hazard exists on or near the machine that can result in injury or death if proper precautions are not taken.

CAUTION

The signal word “CAUTION” is a reminder of safety practices on or near the machine that could result in personal injury if proper precautions are not taken.

Your safety and the safety of others depends significantly upon your knowledge and understanding of all correct operating practices and procedures of this machine.

BEFORE OPERATION 2.3

CONSIDERATIONS

NEVER allow children to operate this riding mower. 1. Do not allow adults to operate this machine without proper instructions.

Do not mow when children and/or others are 2. present. Keep children out of the mowing area and in the watchful care of a responsible adult other than the operator. Be alert and turn machine off if a child enters the area.

DO NOT allow children to ride or play on the 3. machine, it is not a toy.

It is a distinctive word found on the safety decals on the machine and throughout this manual that alerts the viewer to the existence and relative degree of the hazard.

Clear the area to be mowed of objects that could be 4. picked up and thrown by the cutter blades.

DO NOT carry passengers.5. DO NOT operate the machine under the influence of 6.

alcohol or drugs.

Section 2

If the operator(s) or mechanic(s) cannot read English 7. or Spanish, it is the owner's responsibility to explain this material to them.

DO NOT wear loose fitting clothing. Loose clothing,

8. jewelry or long hair could get tangled in moving parts. Do not operate the machine wearing shorts; always wear adequate protective clothing including long pants. Wearing safety glasses, safety shoes and a helmet is advisable and is required by some local ordinances and insurance regulations.

WARNING

Always wear hearing protection. Operating this machine over prolonged periods of time can cause loss of hearing.

Keep the machine and attachments in good 9. operating condition. Keep all shields and safety devices in place. If a shield, safety device or decal is defective or damaged, repair or replace it before operating the machine.

12.

DO NOT add fuel to a running or hot engine. Allow the engine to cool for several minutes before adding fuel. Never fuel indoors or inside enclosed trailers.

Keep flammable objects (cigarettes, matches, etc.), 13. open flames and sparks away from the fuel tank and fuel container. Use only approved containers.

Equipment must comply with the latest requirements 14. per SAE J137 and/or ANSI/ASAE S279 when driven on public roads.

- NOTe -

If the mower is driven on public roads, it must comply with state and local ordinances as well as SAE J137 and/or ANSI / ASAE S279 requirements. Contact your local authorities for regulations and equipment requirements.

Do not operate without the side discharge chute 15. installed and in the down position or with an optional grass catcher or mulch plate completely installed.

Check the blade mounting bolts at frequent intervals 16. for proper tightness.

Make sure all hydraulic fluid connections are tight 17. and all hydraulic hoses and lines are in good condition before starting the machine.

WARNING

This machine is equipped with an interlock system intended to protect the operator and others from injury. This is accomplished by preventing the engine from starting unless the deck drive is disengaged, the parking brake is on, the steering control levers are in the neutral position and the operator is in the seat. The system shuts off the engine if the operator leaves the seat with the deck drive engaged and/or the steering control levers are not in the neutral position and the parking brake is not engaged. Never operate equipment with the interlock system disconnected or malfunctioning.

Be sure the interlock switches are functioning 10. correctly.

Fuel is flammable; handle it with care. Fill the fuel 11. tank outdoors. Never fill it indoors. Use a funnel or spout to prevent spillage. Clean up any spillage before starting the engine.

OPERATION CONSIDERATIONS2.4

Know the function of all controls and how to stop 1. quickly.

WARNING

DO NOT operate on steep slopes. To check a slope, attempt to back up it (with the cutter deck down). If the machine can back up the slope without the wheels slipping, reduce speed and use extreme caution. Under no circumstances should the machine be operated on slopes greater than 15 degrees. ALWAYS FOLLOW OSHA APPROvED OPERATION.

Reduce speed and exercise extreme caution on 2. slopes and in sharp turns to prevent tipping or loss of control. Be especially cautious when changing directions on slopes.

Section 2

To prevent tipping or loss of control, start and stop 3. smoothly, avoid unnecessary turns and travel at reduced speed.

When using any attachment, never direct the 4. discharge of material toward bystanders or allow anyone near the machine while in operation.

Before attempting to start the engine, with the 5. operator in the seat, disengage power to the cutter deck, place the steering control levers in the neutral position and engage the parking brake.

If the mower discharge ever plugs, shut off the 6. engine, remove the ignition key, and wait for all movement to stop before removing the obstruction.

WARNING

DO NOT use your hand to dislodge the clogged discharge chute. Use a stick or other device to remove clogged material after the engine has stopped running and the blades have stopped turning.

The machine and attachments should be stopped 15. and inspected for damage after striking a foreign object, and damage should be repaired before restarting and operating the machine.

CAUTION

Do not touch the engine or the mufﬂer while the engine is running or immediately after stopping. These areas may be hot enough to cause a burn.

DANGER

DO NOT run the engine inside a building or a confined area without proper ventilation. Exhaust fumes are hazardous and contain carbon monoxide which can cause brain injury and death.

Be alert for holes, rocks, roots and other hidden 7. hazards in the terrain. Keep away from any dropoffs. Beware of overhead obstructions (low limbs, etc.), underground obstacles (sprinklers, pipes, tree roots, etc.). Cautiously enter a new area. Be alert for hidden hazards.

Disengage power to cutter deck before backing up. 8. Do not mow in reverse unless absolutely necessary and then only after observation of the entire area behind the mower. If you must mow in reverse, maintain a constant lookout to the rear of the machine and mow slowly.

DO NOT turn sharply. Use care when backing up.9. Disengage power to cutter deck before crossing 10.

roads, walks or gravel drives. Mow only in daylight or good artificial light.11. NEVER raise the deck with the blades engaged.12. Take all possible precautions when leaving the 13.

machine unattended, such as disengaging the mower, lowering the attachments, setting the parking brake, stopping the engine, and removing the key.

Disengage power to the attachments when 14. transporting or when not in use.

Keep hands and feet away from cutter blades and 16. moving parts. Contact can injure.

Transport the mower using a heavy duty trailer 17. or truck. Insure the trailer or truck has all of the necessary lighting and markings as required by laws, codes, and ordinances. Secure a trailer with a safety chain.

Be cautious when loading and unloading onto 18. trailers or trucks. Use only a full width ramp. Ramp angle should be no more than 15 degrees. Back up the ramp and drive down forward.

When transporting the mower, make sure the park 19. brake is engaged, the steering control levers are in the neutral position, the engine is off with the key removed, and the wheels have been blocked.

Tie the mower down securely using straps, chains, 20. cable, or ropes. Both front and rear straps must be directed down and outward from machine.

Use care when approaching blind corners, shrubs, 21. trees, or other objects that may obscure vision.

NEVER leave the machine running unattended.22.

Section 2

ROLL-OvER PROTECTION SYSTEM2.5

WARNING

Reduce speed when turning, operating on slopes, slick or wet surfaces. Allow extra distance to stop.

Stay off of slopes too steep for safe operation. To check a slope, attempt to back up it (with the cutter deck down). If the machine can not back up the slope without the wheels slipping, do not operate the machine on this slope. Under no circumstances should the machine be operated on slopes greater than 15 degrees.

DO NOT mow near drop-offs, ditches or embankments. The machine could suddenly roll over if a wheel goes over the edge or if the edge caves in.

Any or all parts of the Roll-Over Protection System MUST NOT be removed. Failure to adhere to this guideline could result in injury or death.

FOLDABLE ROLL-OvER PROTECTION SYSTEM (IF EqUIPPED)

WARNING

Keep the roll bar in the raised and locked position and the seat belt securely fastened during operation. Failure to do so could cause serious injury or loss of life.

Lower the roll bar only when absolutely necessary.

WARNING

Operate the machine smoothly, no sudden turns, starts or stops on a slope.

NEvER tow on slopes. The weight of the towed equipment may cause loss of traction and loss of control.

DO NOT permit untrained personnel to operate the machine.

Be cautious when loading and unloading onto trailers or trucks.

Use only a full width ramp.

Ramp angle should be no more than 15 degrees.

Back up the ramp and drive down forward.

This mower has been designed for good traction and stability under normal mowing conditions. However, caution must be used when traveling on slopes, especially when the grass is wet. Do not mow on wet grass. Wet grass reduces traction and steering control.

There is no roll-over protection when the roll bar is in the down position.

Lower the roll bar only when absolutely necessary.

Raise the roll bar as soon as clearance permits.

DO NOT wear the seat belt when the roll bar is in the down position.

ALWAYS wear seat belt when roll bar is in the up position.

Operate the machine smoothly, no sudden turns, starts or stops.

Check the area carefully before mowing for proper overhead clearance (i.e. branches, doorways, etc.).

DO NOT contact any overhead object with the roll bar.

To lower the roll bar, loosen the tension knob on both 1. the left hand and right hand bar. See Figure 2-1.

Section 2

UPRIGHT AND LOCKED POSITION

TENSION KNOBS

TENSION KNOB

HAIR PIN

LOCK PIN

INSPECT WEBBING

INSPECT BUCKLE & LATCH

Remove the hairpin cotter pins and remove the two 2. (2) lock pins. See Figure 2-2.

Lower the roll bar to the down position.

To raise the roll bar, lift the bar to the upright 4. position.

WARNING

Failure to properly inspect and maintain the seat belt can cause serious injury or loss of life.

Install the two (2) lock pins through the hole, secure 5. with the two (2) hairpin cotter pins and tighten the tension knobs. See Figure 2-2. Remove the seat belt from the retainer brackets.

Foldable Roll-Over Protection SystemFigure 2-1.

Check the full length of the seat belt webbing for 1. cuts, wear, fraying, dirt and stiffness. See Figure 2-3.

Check the seat belt webbing in areas exposed to 2. ultra violet rays from the sun or extreme dust or dirt. If the original color of the webbing in these areas is extremely faded and/or is packed with dirt, the physical strength of this webbing may have deteriorated. If this condition exists, replace the seat belt system.

Check the buckle and latch for proper operation 3. and determine if the latch plate is excessively worn, deformed, or if the buckle is damaged or cracked. See Figure 2-3.

ROPS HingeFigure 2-2.

The potential exposure of the seat belt to severe environmental conditions make it crucial to inspect the seat belt system regularly.

It is recommended that the seat belt be inspected on a daily basis for signs of damage. Any seat belt system that shows cuts, fraying, extreme or unusual wear, significant discoloration due to UV exposure, dirt or stiffness, abrasion to the seat belt webbing, or damage to the buckle, latch plate, hardware or any other obvious problem should be replaced immediately.

Seat Belt InspectionFigure 2-3.

MAINTENANCE CONSIDERATIONS & 2.6

STORAGE

Never make adjustments to the machine with the 1. engine running unless specifically instructed to do so. If the engine is running, keep hands, feet, and clothing away from moving parts.

Disengage drives, lower implement, set parking

2. brake, stop engine and remove key or disconnect spark plug wire to prevent accidental starting of the engine when servicing or adjusting the machine. Wait for all movement to stop before adjusting, cleaning or repairing.

Section 2

WARNING

Hydraulic ﬂuid is under high pressure. Keep body and hands away from pinholes or nozzles that eject hydraulic ﬂuid under high pressure. If you need service on your hydraulic system, please see your authorized Scag dealer. If hydraulic ﬂuid is injected into the skin, it must be surgically removed within a few hours by a doctor or gangrene may result.

Disconnect battery or remove spark plug wire before 3. making any repairs. Disconnect the negative terminal first and the positive last. Reconnect the positive first and the negative last.

Keep all nuts, bolts and screws tight, to ensure the machine is in safe working condition. Check blade mounting bolts frequently to be sure they are tight.

Do not change the engine governor settings or 5. overspeed the engine. See the engine operator's manual for information on engine settings.

To reduce fire hazard, keep the cutting units, drives, 6. muffler and engine free of grass, leaves, excessive grease, oil and dirt.

Park the machine on level ground and engage the

7. parking brake.

NEVER allow untrained personnel to service the machine.

Use care when checking blades. Use a Blade Buddy, 9. wrap the blade(s) or wear gloves and USE CAUTION when servicing blades. Only replace blades. NEVER straighten or weld blades.

Let the engine cool before storing.13. DO NOT store the machine near an open flame.14. Shut off fuel while storing or transporting.15. DO NOT store fuel near flames or drain indoors.16. Charge batteries in an open, well ventilated area, 17.

away from spark and flames. Unplug charger before connecting or disconnecting from battery. Wear protective clothing and use insulated tools.

USING A SPARK ARRESTOR2.7

The engine in this machine is not equipped with a spark arrestor muffler. It is in violation of California Public Resource Code Section 4442 to use or operate this engine on or near any forest covered, brush covered or grass covered land unless the exhaust system is equipped with a spark arrestor meeting any applicable local or state laws. Other states or federal areas may have similar laws. Check with your state or local authorities for regulations pertaining to these requirements.

Keep all parts in good working condition. Replace all 10. worn or damaged decals.

Use jack stands to support components when 11. required.

Carefully release pressure from components with

12. stored energy.

Section 2

WARNING

INSTALL BELT COvER BEFORE

OPERATING MACHINE

READ OPERATOR'S MANUAL

483402

390S0150G

481568

FORWARD

REvERSE

482710

483397

483406

483407

483402

483444

483407

483397

483633

483425

483429

483300

483444

SAFETY AND INSTRUCTIONAL DECALS2.8

Section 3

SPECIFICATIONS

ENGINE3.1

General Type ................................................................................................Heavy Duty Industrial/Commercial Gasoline

Model:

Scag Model STT52V-27CH, STT61V-27CH .......................................................................Kohler Command CH740S

Scag Model STT61V-27KA ............................................................................................................ Kawasaki FD750D

Scag Model STT61V-29DFI-SS, STT-29DFI-SS ............................................................................Kawasaki FD791D

Scag Model STT61V-35BVAC-SS, STT-35BVAC-SS ........................................................Briggs & Stratton Vanguard

Horsepower @ 3800 RPM:

Scag Model STT52V-27CH, STT61V-27CH ...................................................27HP (Kohler Spec. #PS-CH740-3114)

Scag Model STT61V-27KA ..........................................................................27HP (Kawasaki Spec. #FD750D-CS08)

Scag Model STT61V-29DFI-SS, STT-29DFI-SS ..........................................29HP (Kawasaki Spec. #FD791D-CS04)

Scag Model STT61V-35BVAC-SS, STT-35BVAC-SS ....................35HP (Briggs & Stratton Spec. #613477-0132-E1)

Displacement:

Kohler CH740S...................................................................................................................................................725cc

Kawasaki FD750D and FD791D ........................................................................................................................ 745cc

Briggs & Stratton ................................................................................................................................................ 993cc

Type:

Kohler ...................................................................................4-Cycle, Air-Cooled, Naturally Aspirated Gasoline, OHV

Kawasaki (FD750D) .............................................................4-Cycle, Air-Cooled, Naturally Aspirated Gasoline, OHV

Kawasaki (FD791D) ..................................................... 4-Cycle, Liquid-Cooled, Digital Fuel Injection Gasoline, OHV

Briggs & Stratton .................................................................................4-Cycle, Air-Cooled, Naturally Aspirated, OHV

Cylinders ..................................................................................................................................... 2 with Cast Iron Sleeves

Governor ........................................................................Mechanical Type with Variable Speed Control Set At 3800 RPM

Idle Speed:

Kohler ..........................................................................................................................................................1400 RPM

Kawasaki .....................................................................................................................................................1400 RPM

Briggs & Stratton .........................................................................................................................................1750 RPM

Carburation:

Kohler .......................................................... Fixed Jet Carburetor with Smart-Choke™ and Fuel Shutdown Solenoid

Kawasaki (FD750D) ...................................................................................................Fixed Jet Downdraft Carburetor

Kawasaki (FD791D) .....................................................................................................................Digital Fuel Injection

Briggs & Stratton ..........................................................................................................Fixed Jet Sidedraft Carburetor

Fuel Pump:

Kohler .................................................................................................................... Mechanical with In-Line Fuel Filter

Kawasaki ..............................................................................................High Pressure Electric with In-Line Fuel Filter

Briggs & Stratton ...................................................................................................Mechanical with IN-Line Fuel Filter

Fuel ......................................................................................Non-Leaded Gasoline with a Minimum Octane Rating of 87

Oil Pump ...........................................................................................................................Full Pressure w/Full-Flow Filter

Starter ........................................................................................................................Electric Starting with Solenoid Shift

Belts .................................................................................................................Kevlar cord. Self-adjusting, Self-tightening

ELECTRICAL3.2

Battery .................................................................................................................................................................... 12 Volt

Charging System ............................................................................................................................................... Alternator

Charging Output:

Kohler ..................................................................................................................................................12 Volt, 15 Amp

Kawasaki .............................................................................................................................................12 Volt, 20 Amp

Briggs & Stratton .................................................................................................................................12 Volt, 20 Amp

System Polarity .......................................................................................................................................Negative Ground

Interlock Switches ....................................................... Seat, Neutral Control, Mower Engagement (BBC), Parking Brake

Instrument Panel ......................................................Ammeter, Key Switch, Throttle Lever, Manual Choke, BBC Switch,

Fuses and Safety Start module, Temp. Gauge (KA), Check Engine Indicator (DFI)

Fuses ........................................................................................................................................................Two (2) 20 Amp

Section 3

POWER HEAD3.3

Drive System ............... Hydraulic Drive with Two Variable Displacement Pumps and Two Cast-Iron High Torque Motors

Hydrostatic Pumps .....................................................................Two Hydro-Gear™ 16 cc/rev. Pumps with Dump Valves

Drive Wheel Motors: ............................Two Hydro-Gear™ or Ross Model TG 15 cu. inch Cast-Iron High Torque Motors

Steering/Travel Control ...........................................................................................Twin Lever Fingertip Steering Control

with Individual Control to Each Wheel with Gas Spring Dampers

Parking Brake ...................................................................Lever Actuated Linkage to Brakes on Both Drive Wheel Axles

Wheels:

(2) Front Caster - (52" Deck) .......................................................................................... 13 X 5.00 Four-Ply, Flat Free

(2) Front Caster - (61" & 72" Deck) ................................................................................ 13 X 6.50 Four Ply, Flat Free

(2) Drive - (52" Deck) .................................................... 23 X 10.50 X 12 Four-Ply Pneumatic Tubeless, Radius Edge

(2) Drive - (61" & 72" Deck) ................................................ 24 x 12 x 12 Four-Ply Pneumatic Tubeless, Radius Edge

Tire Pressure:

Front Caster....................................................................................................................................................Flat Free

Drive .................................................................................................................................................................. 12 PSI

Fuel Tank .....................................10-Gallon Seamless Polyethylene Tank with Large Opening and Fuel Gauge Fill Cap

Seat ............................................................................................................... Padded, Thick Cushion with Tall Back Rest

Travel Speed .................................................................................................................... 27HP .....................29HP/35HP

Forward.........................................................................................................................0-10 MPH ....................0-12 MPH

Reverse .........................................................................................................................0-5 MPH .......................0-6 MPH

-NOTE- The machine will travel at 10 mph or 12 mph for transport purposes. For best cutting performance the forward travel speed should be adjusted depending upon the cutting conditions.

CUTTER DECK3.4

Type ......................... Floating, Adjustable, Anti-Scalping, Hybrid Design Combines Out-Front and Belly-Mount Designs

Construction ............................................................................................................................Tri-Plate deck construction

Top of deck consists of three steel plates totaling nearly 1/2" of steel.,7-gauge (3/16") deck skirt. True Cutting Width:

52V ........................................................................................................................................................52" (132.0 cm)

61V ........................................................................................................................................................61" (155.0 cm)

72VS ...................................................................................................................................................71.5" (181.6 cm)

72A .....................................................................................................................................................71.5" (181.6 cm)

Cutting Height Adjustment ...........Foot-Operated Lever Adjustment from Operator's Seat, 1.0" to 6.0" in 1/4"increments

Cutter Blades .........................................................................197 or .250 Thick, Milled Edge, Wear Resistant Marbain™

52V .............................................................................................................................................. Three (3) 18" blades

61V .............................................................................................................................................. Three (3) 21" blades

72VS ......................................................................................................................................... Three (3) 24.5" blades

72A ........................................................................................................................................... Three (3) 24.5" blades

Blade Engagement ............................................................Electric Blade Engagement Clutch with Control Panel Switch

Connected to the Cutter Deck Gearbox through a Drive Shaft.

Discharge Opening ....................Extra-Wide Discharge Opening with Spring-Loaded Discharge Chute and Turbo Bafﬂe

Discharge Chute ...................................................................................................Black, Polypropylene (Plastic), Flexible

Spindles ......................................Heavy-Duty 1-1/8" Top Dimension Spindle Shaft, Cast Housing, Taper Roller Bearing,

Low Maintenance with Top Access Grease Fitting and Grease Overﬁll Relief Poppet

Spindle Pulleys ............................................................................................ Split Steel with Easily Removed Taper Hubs

Cutter Deck Belts ..................................................................B-Section with Kevlar Cord, Self-Adjusting, Self-Tightening

Electric Clutch Type ................................................................................................Ogura Heavy Duty PTO Clutch Brake

Drive Shaft ............................................................................................Clamp Yoke Shaft With Two High-Speed U-Joints

Section 3

HYDRAULIC SYSTEM3.5

Hydraulic Oil Filter ........................................................................................................ 10 Micron Spin-on Element Type

Hydraulic Reservoir .....................................................................................................................Nylon; 3 Quart Capacity

WEIGHTS AND DIMENSIONS 52v 61v 72A / 72vS3.6

Length......................................................................................... 83" ...............................87.5" ...................................90"

Tracking Width ............................................................................ 51" ................................56" ....................................56"

Overall Width w/chute down ......................................................64.5" ..............................73.5" ...................................83"

Overall Width w/chute up ............................................................ 53" ................................62" ....................................73"

Overall Height w/ROPS up ........................................................67.5" ..............................67.5" ................................67.5"

Overall Height w/ROPS down ....................................................56.5" ..............................56.5" ................................56.5"

Operating Weight w/ROPS ....................................................... 1250# ............................1350# .............................1400#

Operating Weight w/ROPS and 35BV Engine .............................NA ..............................1445# .............................1495#

PRODUCTIvITY 52v 61v 72A / 72vS3.7

Cutting Width .............................................................................. 52" ................................61" ....................................72"

Acres Per Day .............................................................................20.2 .............................. 23.7 .....................................28

The preceding chart will aid you in determining how many acres your Scag mower will cut per day. The chart is an estimate based on 8 hours per day cutting time at 6 MPH with a 20% allowance for overlap and turns.

Section 4

CHOKE

481348

LEFT STEERING

CONTROL

MOWER DECK

IGNITION SWITCH

FUEL GAUGE

DUMP vALvE

FUSES

ENGINE CHOKE

CONTROL

ENGINE THROTTLE

CONTROL

RIGHT STEERING

CONTROL

DECK LIFT

DECK RELEASE

2006 STTCHMI

PARKING BRAKE

CONTROL

CUTTING HEIGHT

ADJUSTMENT

KAWASAKI DFI ONLY

AMMETER

SWITCH

WATER TEMPERATURE

CHECK ENGINE

LIGHT

CHECK

ENGINE LIGHT

482796

SLOW

FAST

HOUR METER

SEAT BELT

OPERATING INSTRUCTIONS

CAUTION

Do not attempt to operate this mower unless you have read this manual. Learn the location and purpose of all controls and instruments before you operate this mower.

CONTROLS AND INSTRUMENT 4.1

IDENTIFICATION

Before operating the mower, familiarize yourself with all mower and engine controls. Knowing the location, function and operation of these controls is important for safe and efficient operation of the mower.

Mower Deck Switch (Figure 4-1). 2. Used to engage and disengage the mower drive system. Pulling up on the switch will engage the deck drive. Pushing down on the switch will disengage the deck drive.

Engine Choke Control (Figure 4-1).

3. Used to start

a cold engine. Not used on the 29DFI. Engine Throttle Control (Figure 4-1).4. Used to

control the engine speed. Pushing the lever forward increases engine speed. Pulling the lever back decreases engine speed. Full back position is the IDLE position. Full forward is the cutting position.

Ammeter (Figure 4-1).5. Indicates the condition of the charging system. When the engine is running the needle should be toward the positive end of the meter. If the needle is toward the negative end of the meter, this indicates a discharge condition and the machine should be taken in for service.

Ignition Switch (Figure 4-1).1. The ignition switch is used to start the engine and has three positions; OFF, ON, and START.

Controls and InstrumentsFigure 4-1.

Section 4

390S141-1

DUMP VALVE CONTROL

Hourmeter (Figure 4-1).6. Indicates the number of hours the engine has been operated. It only operates when the engine is running. Has preset maintenance reminders for engine and hydraulic system oil changes. Will start flashing scheduled maintenance 2 hours before preset time and continue flashing until 2 hours after. Automatically resets.

Fuse Holders (Figure 4-1).

7. Two 20-amp fuses

protect the mower’s electrical system. To replace fuses, pull fuse out of the socket and install a new fuse.

8. Used to control

Left Steering Control (Figure 4-1).

the mower's left wheel when traveling forward or reverse.

Right Steering Control (Figure 4-1).

9. Used to

control the mower's right wheel when traveling forward or reverse.

10. Used to

Parking Brake Control (Figure 4-1).

engage and disengage the parking brakes. Pull the lever back to engage the parking brakes. Push the lever forward to disengage the parking brakes.

Fuel Tank Gauge (Figure 4-1). 11. Indicates the amount of fuel in the fuel tank.

Dump valve Control Levers (Figure 4-2). 12. Located on the hydraulic pumps, used to “free-wheel” the mower. Rotating the levers clockwise until they stop allows the unit to move under hydraulic power. The levers must be in this position and torqued to 10 lb-ft during operation of the mower. Rotating the levers counter-clockwise allows the mower to be moved by hand (free-wheeling).

Cutting Height Adjustment (Figure 4-1).14. Used to set the cutter deck at the desired cutting height.

Deck Release Lever (Figure 4-1). 15. Used to lock the cutter deck in the transport position. Push the foot pedal forward and pull back on the release lever to release the cutter deck for normal mowing.

Temperature Gauge (Figure 4-1).

16. Indicates the

operating temperature of the engine. Used on mowers with the liquid-cooled engine only.

Check Engine Light (Figure 4-1).17. Indicates the operation of the engine sensors on the Kawasaki Digital Fuel Injection (DFI). Light will flash once at initial start up. If a problem occurs with a sensor on the engine, the light will flash a code. See your authorized Scag Dealer for diagnosis and repair.

18. Used to secure the operator.

Seat Belt (Figure 4-1).

Seat belt must be worn at all times when the ROPS is in the upright and locked position.

Seat Hold Down Release Latch (Figure 4-1).19. Located behind the seat. Used to secure the seat in the operator's position. Release the latch to gain access under the seat.

SAFETY INTERLOCK SYSTEM4.2

The mower is equipped with a safety interlock system that prevents the engine from starting unless the deck drive is disengaged, the parking brake is engaged, the steering control levers are in the neutral position and the operator is in the seat. The interlock system shuts off the engine if the operator leaves the seat with the steering control levers not in the neutral position and/or the cutter blades engaged and the parking brake not engaged.

Deck Lift Foot Lever (Figure 4-1). 13. Used to raise and lower the cutter deck. Push full forward to lock in the transport position.

WARNING

Never operate the mower with the interlock system disconnected or malfunctioning. Do not disengage or bypass any switch; injury to yourself and others or property damage could result.

Dump Valve ControlFigure 4-2.

Section 4

INITIAL RUN-IN PROCEDURES4.3

Allow engine to warm before operating the mower.

FIRST DAY OF USE OR APPROxIMATELY 20 HOURS

Check all belts for proper alignment and wear at 2, 4 1. and 8 hours.

Change the engine oil and oil filter after the first 20 2. hours of operation. (See Section 7.4.)

Check hydraulic oil level in reservoir. (See Section 3.

7.3.) Check for loose hardware. Tighten as needed.

Check interlock system for proper operation. (See 5. Section 4.2.)

Check tire pressure. Adjust pressure if necessary. (See Section 7.10.)

STARTING THE ENGINE4.4

CAUTION

DO NOT USE STARTING FLUIDS. Use of starting ﬂuids in the air intake system may be potentially explosive or cause a “runaway” engine condition that could result in engine damage and/or personal injury.

Be sure the fuel shutoff valve, located behind the 1. operator's seat, is fully open. (See Section 7.5.)

Secure the ROPS in the upright and locked position. Sit in the operator’s seat, fasten seat belt and place 3.

the steering control levers in the neutral position.

GROUND TRAvEL AND STEERING4.5

- IMPORTANT -

If you are not familiar with the operation of a machine with lever steering and/or hydrostatic transmissions, the steering and ground speed operations should be learned and practiced in an open area, away from buildings, fences, or obstructions.

Learn the operation on flat ground before operating on slopes.

Start practicing with a slow engine speed and slow forward travel.

Learn to feather the steering controls to obtain a smooth operating action.

Practice operating the mower until you are comfortable with the controls before proceeding to mow.

FORWARD TRAvEL

To travel forward with the mower, disengage the parking brake, pull levers inward out of the neutral lock position and slowly push the steering control levers forward an equal distance. The further the steering control levers are pushed forward the greater the forward speed will be. To increase the speed, push the steering control levers further forward and to decrease the speed, pull the steering control levers back.

To stop the forward travel, pull the steering control levers back to the neutral position.

Engage the parking brake.4. Place the PTO switch in the disengaged position.5. If the engine is cold, choke the engine as needed.6. Move the engine throttle control to about half engine 7.

speed.

Turn the ignition key to the START position and release the key as soon as the engine starts. Do not hold the key in the START position for more than 15 seconds at a time. Allow at least 60 seconds between each cranking attempt to prevent overheating of the starter motor. Prolonged cranking can damage the starter motor and shorten battery life.

To steer the mower left while traveling forward, pull the left steering lever back. The further the lever is pulled back, the quicker the mower will turn left.

To steer the mower right while traveling forward, pull the right steering control lever back. The further the lever is pulled back, the quicker the mower will turn right.

- NOTe -

Smooth operation of the steering levers will produce smooth mower operation. While learning the operation of the steering controls, keep the travel speed low.

Section 4

390S0138

PULL UP TO ENGAGE

PUSH DOWN TO DISENGAGE

- IMPORTANT -

Do not travel forward over a curb. The mower will hang up on the curb. Raise the deck and travel backwards over the curb at a 45 degree angle. (See Section 4.1, items 13 - 15, on page 14 for cutter deck raising descriptions.)

REvERSE TRAvEL

CAUTION

Disengage power to the mower before backing up. Do not mow in reverse unless absolutely necessary and then only after observation of the entire area behind the mower.

CAUTION

To stop the reverse travel, allow the steering control levers to return to the neutral position. If the mower is to be parked, place the handles in the neutral lock position and engage the parking brake.

ENGAGING THE DECK DRIvE (CUTTER 4.6

BLADES)

Set the throttle at about 3/4 speed. Do not attempt to 1. engage the deck drive at high speed as this shortens the electric clutch life — use only moderate engine speed when engaging the deck drive.

Engage the deck drive by pulling out on the yellow 2. switch, located on the instrument panel, to the engage position. See Figure 4-3.

Before backing up, observe the rear for persons and obstructions. Clear the area before backing up. Possible injury or property damage could occur.

To travel in reverse, pull levers inward out of the neutral lock position and pull both handles back. Keep the travel speed low while traveling in reverse.

- NOTe -

The mower may not travel straight in reverse. Slight adjustments may need to be made using the steering controls.

To steer left while traveling in reverse, allow the left steering control lever to move forward. The further the control is allowed to move forward, the quicker the mower will turn left.

To steer right while traveling in reverse, allow the right steering control lever to move forward. The further the control is allowed to move forward, the quicker the mower will turn right.

Cutter engage SwitchFigure 4-3.

- NOTe -

A squealing noise may be heard when engaging or disengaging the deck drive. It is caused by the electric clutch plates meshing as the mower comes up to speed. This is normal.

To disengage the deck drive, push the switch in to 3. the disengage position.

Always operate the engine at full throttle to properly 4. maintain cutting speed. If the engine starts to lug down, reduce the forward speed and allow the engine to operate at maximum RPM.

Section 4

HILLSIDE OPERATION4.7

WARNING

This mower has been designed for good traction 1. and stability under normal mowing conditions. However, caution must be used when traveling on slopes, especially when the grass is wet. Wet grass reduces traction and steering control. The Roll-Over Protection System is standard equipment for this machine. See Section 2.5, page 6 of this manual for further details.

AFTER OPERATION4.9

Wash the entire mower after each use. Do not 1. use high pressure spray or direct the spray onto electrical components.

- IMPORTANT -

Do not wash a hot or running engine. Cold water will damage the engine. Use compressed air to clean the engine if it is hot.

Keep the entire mower clean to inhibit serious heat

2. damage to the engine or hydraulic oil circuit.

Check the drive belts for proper alignment and any 3. signs of wear. Correct and adjust if necessary.

DANGER

To avoid injury from burns, allow the mower to cool before removing the fuel tank cap and refueling.

To prevent tipping or loss of control, do not start or 2. stop suddenly, avoid unnecessary turns and travel at reduced speed. If tires loose traction, disengage blades and proceed slowly off the slope.

Avoid sudden starts when mowing uphill. Sudden 3. starts may cause the machine to tip backwards.

Loss of traction may occur when traveling down hill.

4. Weight transfers to the front of the machine and may cause the drive wheels to slip causing loss of braking or steering.

Keep tires properly inflated.

PARKING THE MOWER4.8

Park the machine on a flat, level surface only. Do not 1. park the machine on an incline.

Place the steering control levers in the neutral

2. position.

Disengage the cutter blades.3. Slow the engine to idle speed.4. Engage the parking brake.5.

After the mower has cooled down, fill the fuel tank with fresh, clean fuel at the end of every day of operation. See Engine Owner's Manual for proper octane requirements.

Check the tire pressure. Adjust pressure if 5. necessary.

REMOvING CLOGGED MATERIAL4.10

DANGER

ROTATING BLADES

NEvER PUT YOUR HANDS INTO THE DISCHARGE CHUTE FOR ANY REASON!

Shut off the engine and remove the key and only then use a stick or similar object to remove material if clogging has occurred.

Turn the ignition key to the OFF position and remove 6. the key.

If the discharge chute becomes clogged, shut off the engine and remove the ignition key. Using a stick or similar item, dislodge the clogged material. Then resume normal mowing.

MOvING MOWER WITH ENGINE 4.11

390S141-1

DUMP VALVE CONTROL

CUTTING

HEIGHT

5.5

4.5

3.5

2.5

1.5

390S0140-2

HEIGHT ADJUSTMENT PEDAL

LANYARD PIN

STOPPED

To “free-wheel” or move the mower around without the engine running, rotate the dump valve levers counterclockwise. See Figure 4-4. Disengage the parking brake and move the mower by hand. When the machine is in the desired position, engage the parking brake and rotate the levers clockwise until they stop. The dump valve levers must be returned to the DRIVE position and torqued to 10 lb-ft to drive the mower.

Section 4

Keep mower and discharge chute clean. When mowing wet or tall grass, mow the grass twice. 5.

Raise the mower to the highest setting for the first pass and then make a second pass to the desired height.

Use a slow travel speed for trimming purposes.6. Operate the engine at full throttle for best cutting. 7.

Mowing with a lower RPM causes the mower to tear the grass. The engine is designed to be operated at full speed.

Use the alternate stripe pattern for best lawn 8. appearance. Vary the direction of the stripe each time the grass is mowed to avoid wear patterns in the grass.

ADJUSTING CUTTING HEIGHT4.13

The mower deck can be adjusted from a height of 1.0 inch to 6.0 inches at 1/4-inch intervals. To adjust the cutting height:

DO NOT operate without Discharge Chute, Mulching Kit, or entire Grass Catcher properly installed.

Dump Valve ControlFigure 4-4.

RECOMMENDATIONS FOR MOWING4.12

Do not mow with dull blades. A dull blade will tear 1. grass, resulting in poor lawn appearance and reduced mowing power.

WARNING

The discharge chute must not be removed and 2. must be kept in the lowest position to deflect grass clippings and thrown objects downward. Direct the side discharge away from sidewalks or streets to minimize cleanup of clippings. When mowing close to obstacles, direct the discharge away from the obstacles to reduce the chance of property damage by thrown objects.

WARNING

DO NOT adjust the cutting height with the mower blades rotating. Disengage the power to the cutter blades and then adjust cutting height.

Disengage the power to the cutter blades. Push the cutting height adjustment foot pedal all 2.

the way forward using your right foot until it locks in place. See Figure 4-5.

Cut grass when it is dry and not too tall. Do not cut 3. grass too short (cut off 1/3 or less of existing grass for best appearance). Mow frequently.

Adjusting Cutting HeightFigure 4-5.

Section 4

CUTTING

HEIGHT

5.5

4.5

3.5

2.5

1.5

481543

390S0151-1

DECK RELEASE LEVER

TENSION KNOB

ROTATE LEvER

CUTTING

HEIGHT

5.5

4.5

3.5

2.5

1.5

481

390S0140-2

HEIGHT ADJUSTMENT PEDAL LOCATIONS

Insert the lanyard pin into the cutting height index at 3. the desired cutting height. Push forward on the deck lift foot lever, hold in place and pull back on the deck release lever. See Figure 4-6. Slowly release the foot pedal. A deck height decal is located on the cutting height index as an aid in adjusting the deck to the desired height. See Figure 4-5.

Adjusting Steering LeversFigure 4-7.

The control handle can also be adjusted in two different positions. If necessary, remove the two bolts securing the control handle to the control lever. Install the handle in the desired position.

ADJUSTING THE STEERING LEvERS4.14

Position the seat to the desired location.1. While in the operator's position without the engine 2.

running, move both steering levers forward and reverse to check for full function control and comfort.

If adjustment of the steering levers is needed, use 3. the following instructions to adjust.

A. Loosen the tension knob on the lever assembly.

B. Rotate the steering lever forward or backward to achieve the optimum operating position.

C. Tighten the tension knob and repeat on the opposite side.

D. While in the operator's position, bring the steering levers out of the neutral lock position and check to make sure both levers are even before operating.

ADJUSTING THE HEIGHT ADJUST 4.15

PEDAL

Deck Release LeverFigure 4-6.

Position the seat to the desired location.1. While in the operator's position with out the engine 2.

running, push down on the height adjust pedal to check for full function control.

The height adjust pedal can be located in three (3) 3. different positions for operator comfort and control. See Figure 4-8.

Height Adjust Pedal LocationsFigure 4-8.

TOWING (OPTIONAL HITCH 4.16

ACCESSORY)

NEVER allow children or others in or on towed 1. equipment.

Tow only with a machine that has a hitch designed

2. for towing. Do not attach towed equipment except at the hitch point.

Follow manufacturer's recommendations for weight 3. limit for towed equipment. 250 lbs. maximum towing weight.

NEVER tow on slopes. The weight of the towed equipment may cause loss of traction and loss of control.

Travel slowly and allow extra distance to stop.5. Zero-turning with a trailer attached could cause 6.

damage to the trailer or mower.

Section 4

Section 5

Width of Deck

SGB020

Width of Deck

SGB018

Width

Deck

Width

Deck

SGB019

CONDITION CAUSE CURE

TROUBLESHOOTING CUTTING CONDITIONS

STRINGERS - OCCASIONAL BLADES OF UNCUT GRASS

STREAKING - STRIPS OF UNCUT GRASS IN CUTTING PATH

Low engine RPM Run engine at full RPM

Ground speed too fast Slow speed to adjust for conditions

Wet grass Cut grass after it has dried out

Dull blades, incorrect sharpening Sharpen blades

Deck plugged, grass accumulation Clean underside of deck

Belts slipping Adjust belt tension

Dull, worn blades Sharpen blades

Incorrect blade sharpening Sharpen blades

Low engine RPM Run engine at full RPM

Belt slipping Adjust belt tension

Deck plugged, grass accumulation Clean underside of deck

STREAKING - STRIPS OF UNCUT GRASS BETWEEN CUTTING PATHS

Ground speed too fast Slow speed to adjust for conditions

Wet grass Cut grass after it has dried out

Bent blades Replace blades

Not enough overlapping between rows Increase the overlap of each pass

Width of Deck

SGB020

Width of Deck

SGB021

Width of Deck

SGB023

TROUBLESHOOTING CUTTING CONDITIONS (CONT'D)

CONDITION CAUSE CURE

Section 5

UNEvEN CUT ON FLAT GROUND - WAvY HIGH-LOW APPEARANCE, SCALLOPED CUT, OR ROUGH CONTOUR

UNEvEN CUT ON UNEvEN GROUND - WA vY APPEARANCE, HIGH-LOW SCALLOPED CUT, OR ROUGH CONTOUR

Lift worn from blade Replace blade

Blade upside down Mount with cutting edge toward ground

Deck plugged, grass accumulation Clean underside of deck

Too much blade angle (deck pitch) Adjust pitch and level

Deck mounted improperly See your authorized SCAG dealer

Bent spindle area See your authorized SCAG dealer

Dull blade Sharpen blade

May need to reduce ground speed, raise

Uneven ground

cutting height, and/or change direction of cut

SLOPING RIDGE ACROSS WIDTH OF CUTTING PATH

Tire pressures not equal Check and adjust tire pressure

Wheels uneven Check and adjust tire pressure

Deck mounted incorrectly See your authorized SCAG dealer

Deck not level side-to side Check for level and correct

Section 5

Width of Deck

SGB022

Width of Deck

SGB024

Width of Deck

SGB025

TROUBLESHOOTING CUTTING CONDITIONS (CONT'D)

CONDITION CAUSE CURE

SCALPING - BLADES HITTING DIRT OR CUTTING vERY CLOSE TO THE GROUND

STEP CUT - RIDGE IN CENTER OF CUTTING PATH

Low tire pressures Check and adjust pressures

Ground speed too fast Slow speed to adjust for conditions

May need to reduce ground speed, raise

Cutting too low

cutting height, change direction of cut, and/or change pitch and level

May need to reduce ground speed, raise

Rough terrain

cutting height, and/or change direction of cut

Ground speed too fast Slow speed to adjust for conditions

Wet grass Cut grass after it has dried out

Blades not mounted evenly Adjust pitch and level

Bent blade Replace blade

Internal spindle failure See your authorized SCAG dealer

SLOPE CUT - SLOPING RIDGES ACROSS WIDTH OF CUTTING PATH

Mounting of spindle incorrect See your authorized SCAG dealer

Bent spindle mounting area See your authorized SCAG dealer

Internal spindle failure See your authorized SCAG dealer

Bent deck housing See your authorized SCAG dealer

ADJUSTMENTS

390S0152-1

LOOSEN HERE

2" to 2-1/4" Clearance

390S0153-1

LOOSEN HERE

1/8"

Section 6

PARKING BRAKE ADJUSTMENT6.1

WARNING

Do not operate the mower if the parking brake is not operable. Possible severe injury could result.

The parking brake linkage should be adjusted whenever the parking brake lever is placed in the “ENGAGE” position and the parking brake will allow the mower to move. If the following procedures do not allow you to engage the parking brake properly, contact your Scag dealer for further brake adjustments.

Position a floor jack under the rear of the machine. 1. Raise the machine and support it to prevent it from falling. Block the caster wheels to prevent the machine from moving. Remove the drive wheels.

With the brake lever in the disengaged position,

2. check the distance between the top of the frame tube and the bottom of the brake handle. The distance should be 2" to 2-1/4". See Figure 6-1.

- NOTe -

If this procedure does not achieve proper brake adjustment, please contact your authorized Scag dealer.

Brake AdjustmentFigure 6-1.

If the distance is not at the specified measurement, 3. adjust by loosening the jam nuts at both ends of the brake control rod and turning the rod until the proper distance is achieved. Tighten the jam nuts. See Figure 6-1.

With the brake in the engaged position, check the distance between the lower nut on the brake actuator rod and the brake actuator lever on the LH side of the machine. The distance should be 1/8". See Figure 6-2.

If the distance is not at the specified measurement,

5. loosen the jam nut at the clevis on the top of the brake actuator rod. See Figure 6-2.

Turn the bolt at the bottom of the brake actuator lever 6. until the 1/8" measurement is achieved and tighten the jam nut at the clevis on the brake actuator rod. See Figure 6-2.

Repeat steps 4 though 6 on the RH side of the 7. machine.

Replace the drive wheels and test the brake.8.

Brake Rod AdjustmentFigure 6-2.

Section 6

390S0149-1

CONTROL

ROD

LOOSEN

HERE

STT99RHCRA

LOOSEN HERE

ADJUST HERE

390S0147-1

LOOSEN

HERE

390S0146

LOOSEN HERE

ADJUST HERE

TRAvEL ADJUSTMENTS6.2

Neutral or tracking adjustments will need to be made if:

A. The steering control levers are in the neutral position and the machine creeps forward or backward. See Neutral Adjustment on page 25 (next procedure).

B. The steering control levers are in the full forward position and the mower pulls to one side or the other when traveling in a forward direction. See Tracking Adjustment on page 26.

NEUTRAL ADJUSTMENT

Be sure the dump valve levers are in the run position 1. and the steering control levers are in the neutral lock position.

With an operator in the seat, start the engine and disengage the parking brake.

Run the engine at full operating speed and check if 3. the machine creeps forward or backwards.

Adjust the RH wheel by loosening the jam nuts on 4. the steering control rod and turning the rod until the drive wheel turns in the forward direction. Turn the rod back until the drive wheel stops moving. Turn the rod an additional 1/2 turn. See Figure 6-3.

RH Steering Control Rod AdjustmentFigure 6-3.

Tighten the jam nuts and repeat for the LH wheel. 5. See Figure 6-4.

LH Steering Control Rod AdjustmentFigure 6-4.

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