Cub Cadet GT 2521 Operator's Manual
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Cub Cadet GT 2521 Operator's Manual

Series 2000 w/48" mower deck
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See also: Operator's Manual
O
M
PERATOR'S
ANUAL
SERIES 2000
TRACTOR

Model Number

GT 2521
w/48" Mower Deck
IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
Warning:
This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-
covered, brush-covered or grass-covered land unless the engine's exhaust system is equipped with a spark arrester meeting
applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator.
In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have
similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized
service dealer or contact the service department, P.O. Box 361131 Cleveland, Ohio 44136-0019.
CUB CADET LLC P.O. BOX 361131 CLEVELAND, OHIO 44136-0019 [www.cubcadet.com]
PRINTED IN U.S.A.
FORM NO. 769-01031
(12/03)

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Summary of Contents for Cub Cadet GT 2521

  • Page 1: Model Number

    Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized service dealer or contact the service department, P.O. Box 361131 Cleveland, Ohio 44136-0019. CUB CADET LLC P.O. BOX 361131 CLEVELAND, OHIO 44136-0019 [www.cubcadet.com] PRINTED IN U.S.A.

  • Page 2: Emission Control Systems Warranty

    Briggs & Stratton Corporation (B&S), the California Air Resources Board (CARB) and the United States Environmental Protection Agency (U.S. EPA) Emission Control Systems Warranty Statement(Owner’s Defect Warranty Rights and Obligations) EMISSION CONTROL WARRANTY COVERAGE IS APPLICABLE TO CERTIFIED ENGINES PURCHASED IN CALIFORNIA IN 1995 AND THERE- AFTER, WHICH ARE USED IN CALIFORNIA, AND TO CERTIFIED MODEL YEAR 1997 AND LATER ENGINES WHICH ARE PURCHASED AND USED ELSEWHERE IN THE UNITED STATES (AND AFTER JANUARY 1, 2001 IN CANADA).

  • Page 3: Table Of Contents

    CONTENTS Section Page Section Page Emission Control Systems Warranty ... Off-Season Storage ......Tractor and Deck Preparation....Mowing..........Safe Operation Practices ..... Optional Equipment and Accessories . Product Graphics ......... Maintenance Chart....... To The Owner ........Trouble Shooting........Calling Service Information ....Lubrication Table .......

  • Page 4: Safe Operation Practices

    WARNING • The engine exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. • This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brush-covered, or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any).
  • Page 5 Do not use the grass catcher on steep slopes. exhaust presenting a potential fire hazard. 22. Use only accessories approved for this machine III. CHILDREN by Cub Cadet. Read, understand and follow all Tragic accidents can occur if the operator is not alert instructions provided...
  • Page 6 5. Never allow children under 14 years old to 8. After striking a foreign object, stop the engine, operate the machine. Children 14 years and over remove the wire from the spark plug and should only operate the machine under close thoroughly inspect the mower for any damage.

  • Page 7: Product Graphics

    PRODUCT GRAPHICS ing, painted over or can no longer be read. Replace- ment safety graphics are available through your Keep product safety graphics (decals) clean. Replace dealer. any safety graphic that is damaged, destroyed, miss- STARTING INSTRUCTIONS BE FAMILIAR WITH CONTROLS BEFORE STARTING ENGINE AND OPERATING.

  • Page 8: To The Owner

    CAUTION: DO NOT tow your Model GT 2521 tractor. Towing may damage the transmission. Place the tractor on a LEVEL SURFACE before pulling the transmission release lever to the disengaged position.

  • Page 9: Controls And Indicators

    SECTION I. CONTROLS AND INDICATORS Your Cub Cadet Tractor has been safety engineered. Thoroughly acquaint yourself with all the controls and This section gives a brief description of the function indicators before attempting to start or operate the and location of the various controls and indicators.
  • Page 10 If the oil level is a uniform engine speed. within the operating range, but the light remains on, contact your Cub Cadet dealer. NOTE CAUTION When using power take-off operated equip- ment, best performance is achieved with the throttle lever in the “FAST”...
  • Page 11 BRAKE PEDAL The brake pedal is located at the front of the right run- ning board above the forward control pedal. Press down to stop the tractor and disengage the cruise con- trol. The brake pedal must be fully depressed to acti- vate the safety interlock switch when starting the tractor.
  • Page 12 8). Whenever engine maintenance is required, the tem should ever malfunction, do not operate the trac- side panels can be removed. tor. Contact your authorized Cub Cadet Dealer. The safety interlock system prevents the engine from cranking or starting unless the brake pedal is fully de- pressed, and the PTO switch is in the “OFF”...
  • Page 13 UPPER FRONT WING NUT GRASP REAR WING NUT SIDE PANEL REAR TAB RETAINER WITH ON PANEL TAPERED GUIDE GRILLE GROOVE IN DASH PANEL GRASP Figure 8...

  • Page 14: Operation

    SECTION II. OPERATION 6. Check the tire inflation pressures. 7. Adjust the seat for operator’s maximum comfort, WARNING visibility and for maintaining complete control of the tractor. Receive Instruction - Read the operator’s 8. Remove the side panels and clean manual.
  • Page 15 1. Operator must be sitting in the tractor seat. TRACTOR BREAK-IN PROCEDURE 2. Pull choke control knob to full choke position. Less choking may be necessary due to variations CAUTION in temperature, grade of fuel, etc. Little or no choking will be needed when the engine is warm. Never operate a new engine immediately 3.
  • Page 16 5. Turn the ingnition key to the “START” position and hold until the engine starts; however, do not crank CAUTION the engine continuously for more than 5 seconds at a time. Once the engine starts, gradually adjust Do not use the forward or reverse control the choke as needed to keep the engine running until pedals to change the direction of travel when warmed up, then push the choke control all the way...
  • Page 17 DRIVING ON SLOPES 1. Start and run the engine a few minutes to warm up. Refer to the SLOPE GAUGE on page 55 to help deter- 2. With the mowing deck, snow thrower, etc. installed mine slopes where you may not operate safely. and the engine running at approximately 50% throttle, engage and disengage the clutch at ten second intervals (ten seconds ON-ten seconds...

  • Page 18: Adjustments

    SECTION III. ADJUSTMENTS This section contains adjustment information for the To adjust the braking force, refer to Figure 11 and Model GT 2521 tractor. Adjustment information for the proceed as follows: 48 inch deck is located in Section V – Mower Deck 1.
  • Page 19 WHEEL ALIGNMENT 5. Disconnect the front ball joints from the steering arms by removing the hex lock nuts (Refer to The front wheels should toe-in approximately 1/8 to Figure 13). Manually move each wheel to achieve 1/4 inch, as measured across dimensions A and B the required toe-in and equal D measurements.
  • Page 20 2. Pivot the ends of the axle up and down to check for binding. If the axle is binding, loosen the lock nuts WARNING (See Figure 14) until binding is eliminated. Place the tractor on a firm and level surface and chock the front wheels before raising the rear PIVOT AXLE wheels from the ground.
  • Page 21 CONTROL 1. Front Control Rod 2. Rear Control Rod 3. Hex Tap Screw 4. Hex Wash Hd Tapp Screw 5. Control Arm 6. Control Arm Pin 7. Neutral Arm 8. Centering Pin 9. Neutral Return Adjust. Brkt. 10. Internal Cotter Pin Figure 15.
  • Page 22 CARBURETOR ADJUSTMENTS 2. With the engine running, place the throttle control in the “SLOW” position. 3. Rotate the carburetor throttle lever against the idle WARNING speed screw and hold it (See Figure 17). When making adjustments to the carburetor 4. Turn the idle speed screw to obtain 1200 RPM. while the engine is running, disengage the PTO 5.
  • Page 23 Control Adjustments To adjust the throttle control, remove the air cleaner. Move the the throttle control to the “FAST” position. To adjust the choke control, remove the air cleaner. The swivel should be against the throttle stop (See Fig- Move the choke control to the full choke position. The ure 19).

  • Page 24: Maintenance

    SECTION IV. MAINTENANCE ENGINE OIL The engine oil must be drained and replaced with new NOTE oil after the first 5 to 8 hours of engine operation and then after every 50 hours of operation. Check the oil level only while the engine is stopped and the tractor is level.
  • Page 25 The filters can be obtained valve (Refer to Figure 22). Remove the dipstick. through your Cub Cadet dealer under part number BS-492932. 4. Attach the flexible tubing (supplied in owner’s Refer to the MAINTENANCE CHART and the manual package) to the drain valve.
  • Page 26 5. To open the drain valve, push it slightly inward and 4. Securely screw the oil filler cap into the valve turn it counterclockwise until it stops, then pull it cover and the dipstick into the tube. outward. Allow the old oil to completely drain from the engine crankcase into the container below.
  • Page 27 Refer to the MAINTENANCE CHART for information regarding frequency hydrostatic transmission oil filter replacement. The filter can be obtained through your Cub Cadet dealer under the part number 923-3014. TRANSMISSION OIL FILTER Refer to the LUBRICATION TABLE for information regarding the oil capacity and the proper type of oil to pour into the transmission case.
  • Page 28 4. Apply a light coating of clean transmission oil to the CLIPS gasket of the new filter. Install the filter by turning it clockwise, by hand, until the gasket contacts the COVER filter base on the transmission housing; then tighten the filter an additional 1/2 turn. KNOB 5.
  • Page 29 CLEANING ENGINE This tractor has an air-cooled engine. Air must be able to circulate freely around the engine through the flywheel screen, through the cooling shrouds and over the fins of the cylinder head and cylinder block (See Figure 27). Keep these areas free of accumulated dirt and debris to keep the engine from overheating and possibly causing extensive engine damage.
  • Page 30 FUEL FILTER 5. With the terminals pointing upward, align the tab of the socket with the notch of the reflector. Push the socket inward and turn as follows to lock: WARNING • Left headlight — approximately 1/4 turn clock- wise. Do not replace the fuel filter when engine is hot.
  • Page 31 MAINTENANCE OF BATTERY Battery Installation: 1. Connect the Positive cable. The tractor is shipped with a wet battery — the battery 2. Connect the Negative cable. acid has already been added and the battery sealed. Although the battery is maintenance free, the following To replace the battery, proceed as follows: care should be taken when handling the battery and to 1.
  • Page 32 5. Loosen the hose clamp and pull the drain tube 2. Attach the second jumper cable from the negative from the battery. terminal of the good battery to the FRAME OF THE UNIT WITH THE DEAD BATTERY. 6. Lift the battery upward and remove from the left side of the tractor.

  • Page 33: Mower Deck

    SECTION V. MOWER DECK A. INSTALLATION AND REMOVAL OF DECK INSTALLATION OF DECK WARNING Before installing the mower deck, place the PTO switch in the “OFF” position, engage the brake pedal lock, turn the ignition key to the “OFF” position and remove the key from the switch.
  • Page 34 8. While holding the front lift rod up, slide the mower deck forward until the rod aligns with both front NOTE roller bracket slots. Lower the lift rod into the front roller bracket slots and slide the deck rearward to If installing the deck on a new tractor, cut the engage the lift rod fully forward in the slots of the cable tie used to hold the front lift rod up during...
  • Page 35 NOTE: It may be necessary to lift each side of the deck 13. Pass the PTO belt upward inside the front of the and maneuver it slightly to align the support pins with tractor frame and install the forward end of the belt the holes of the lift links.
  • Page 36 PTO BELT LIFT ASSIST SPRING MOWER DECK CENTER DOUBLE PULLEY FRONT OF DECK HOLE IN REAR DECK BRACKET Figure 44 17. While holding the belt in position, rotate the deck idler arm lever into its stop bracket to tension the Figure 47 PTO belt (Refer to Figure 45).

  • Page 37: Removal Of Deck

    B. REMOVAL OF DECK LIFT ASSIST SPRING WARNING Before removing the mower deck, place the PTO switch in the “OFF” position, engage the brake pedal lock, turn the ignition key to the “OFF” position and remove the key from the switch.
  • Page 38 7. Lower the mower deck by moving the implement lift handle to its lowest setting. Disengage the deck WARNING idler arm lever from its stop bracket and release the spring tension by rotating the lever out and If the engine has been recently operated, the rearward (See Figure 52).
  • Page 39 11. Pull the deck support pins outward, turn downward TRACTOR and release so both spring-loaded pins are held in LATCH RECEIVER the disengaged position against the outer surface (BOTH SIDES) of the deck brackets (See Figure 57). QUICK ATTACH LIFT SHOULDER BOLT LINK (BOTH SIDES)
  • Page 40 B. DECK LEVELING ADJUSTMENTS The 48" mower deck is equipped with ground following front castor wheels and is designed to run on its own wheels. However, to ensure even cutting, the mower DECK deck should be properly leveled. The leveling INSTALLED procedure will result in the left and right blades having corresponding cutting-edge-to ground measurements...

  • Page 41: Front To Back Leveling Adjustment

    8. Loosen the upper jam nut on the hanger bracket 3. Position the mower blades so the ends of each and turn away from the adjustment ferrule. Turn blade point to the front and the rear of the tractor the lower lock nut upward (tighten) on the threads (See Figure 65).

  • Page 42: Cutting Height Adjustment

    8. Raise the deck to the highest position. Recheck To adjust the mower deck cutting height by raising or the blade measurements described in step 4. If the lowering the ball wheels, refer to Figure 67 and resultant measurements are not correct, repeat proceed as follows: steps 5, 6 and 7 until the proper measurements are 1.

  • Page 43: Cleaning And Blade Care

    C. MAINTENANCE When removing the blades, use a 1-1/4 inch wrench to hold the hex shaped hub of the pulley when loosening CLEANING AND BLADE CARE the hex nut securing the blade. A block of wood may be placed between the deck housing and the cutting edge of the blade to assist in removal of the hex nut WARNING securing the blade (See Figure 69).

  • Page 44: Spindle Drive Belt Replacement

    Every 50 hours, or twice yearly, lubricate the double 1. Disengage the idler arm lever from its stop bracket pulley with 251H EP grease or an equivalent No. 2 and rotate the lever to the outside of the deck to multipurpose lithium grease.

  • Page 45: Off-Season Storage

    SECTION VI. OFF-SEASON STORAGE If the machine is to be inoperative for a period longer 2. If emptying the fuel system: than days, following procedures recommended: WARNING Do not drain fuel when the engine is hot. Allow WARNING the engine adequate time to cool. Drain fuel into an approved container outdoors, away from Never store the tractor with fuel in the tank open flame.

  • Page 46: Mowing

    SECTION VII. MOWING MOWING WARNING To avoid possible injury, do not allow anyone in the area opposite the discharge chute while mowing. Although area been supposedly cleared of foreign objects, small objects may be picked up and discharged by the mower. WARNING Never direct the discharge of material toward bystanders or allow anyone near the machine...

  • Page 47: Optional Equipment And Accessories

    Refer to the allied equipment can be purchased from, and installed attachment guide for a complete description of by, your authorized Cub Cadet dealer. equipment and required components that can be utilized with your tractor.

  • Page 48: Maintenance Chart

    MAINTENANCE CHART 10 hours 30 hours or 50 hours 100 hours Operation to Before or once Every three times or twice Before be performed each a month 25 hours a season a season yearly storage Clean grille, engine More often air inlet screen, dash under dirty intake screen and side...

  • Page 49: Trouble Shooting

    TROUBLE SHOOTING Possible Cause Possible Remedy HARD TO START No gasoline in fuel tank or carburetor ..... Fill the tank with gasoline. Check the fuel line, carburetor and fuel filter. Fuel line or carburetor clogged........ Clean the fuel line and carburetor with a commercial carburetor cleaner.
  • Page 50 TROUBLE SHOOTING Possible Cause Possible Remedy LACK OF POWER Air cleaner clogged ..........Service the air cleaner element. Refer to “MAINTE- NANCE.” Engine overload............Reduce the load. Engine overheated..........Make sure the air intake screen, shrouding, engine fins, side panels, dash intake screen and grille are free of accumulated dirt and debris.

  • Page 51: Lubrication Table

    Cub Cadet Drive System Fluid Plus transmission case before needed 6 qts NOTE: Cub Cadet Drive System Fluid Plus is specially with filter each formulated for this application. If any other oil is used Cub Cadet will not be responsible for substandard performance.

  • Page 52: Lubrication Guides

    LUBRICATION GUIDE WARNING The service life and reliability of any machine depends upon the care it is given. Proper lubrication is a very important part of that care. This lubrication schedule reflects the minimal requirements to maintain the equipment. More frequent inspections and maintenance is preferable. NOTE: We do not recommend the use of a pressure Lubricant is cheap.

  • Page 53: Lubrication Guide

    LUBRICATION GUIDE —Before Each Use 1. Engine filler cap and Check the oil (with the engine stopped) and add sufficient new oil to bring it to dipstick the “FULL” mark on the dipstick. Do not overfill. Do not operate the engine if the oil level is below the “LOW”...
  • Page 54 LUBRICATION GUIDE...

  • Page 55: Slope Gauge

    SLOPE GAUGE (Keep this sheet in a safe place for future reference.)

  • Page 57: Specifications

    3350 RPM Valve Clearance (engine cold) Intake ................. .004-.006 in. Exhaust ................004-.006 in. Ignition .................. Battery Spark Plug Gap (Cub Cadet No. 759-3336) ......030 in. ELECTRICAL SYSTEM System Voltage ..............12 volt neg. ground Battery ................... 725-1706 Alternator ................

  • Page 58: Warranty - Commercial Use

    CUB CADET CORPORATION MANUFACTURER’S ONE YEAR LIMITED WARRANTY (COMMERCIAL USE) The limited warranty set forth below is given by CUB CADET CUB CADET does not extend any warranty for LLC (“CUB CADET”) with respect to new merchandise products sold or exported outside of the United...

  • Page 59: Warranty - Residential Use

    CUB CADET will, at its option, repair or re- warranted product. place, free of charge, any PTO clutch or mounting hardware found to be defective in material or workmanship provided this product has been operated and maintained as set forth above.

  • Page 60: Maintenance Parts Chart

    MAINTENANCE PARTS CHART MODEL GT 2521 SERIES 2000 21 HP VANGUARD Engine Oil Requirements approx. . . 3 pints Part No. ENGINE OIL Cub Cadet engine oil Ambient temperature viscosity (Grade SG,SH,SJ or Higher) Above +40°F SAE 30 737-3029 0° to +40°F...

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