Mtd GT 2521 owners Manual
OPERATOR’S MANUAL
SERIES 2000
TRACTOR
Model Number
GT 2521
w/48" Mower Deck
IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
Warning:
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.
This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-
FORM NO. 769-01031
(12/03)
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 De fect Warranty Rights and Obligations)
EMISSION CONTROL WARRANTY COVERAGE IS APPLICABLE TO CERTIFIED ENGINES PURCHASED IN CALIFORNIA IN 1995 AND THEREAFTER, 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).
California and United States Emission Control Defects Warranty Statement
The California Air Resources Board (CARB), the U.S . En vironme ntal Protecti on Agency (EPA), and Briggs & Stratton are pleased to explain the Emission
Control Systems Warranty on y o ur mo del year 2002 and later small off-road engine (SORE). In California, new small off-road engines must be designed,
built and equipped to meet the State’s stringent anti-smog standards. Elsewhere in the United States, new non-road, spark-ignition engines certified for
model year 1997 and later must meet similar st r andar ds se t forth by the U.S. EPA. B&S must warrant the emission control system on your engine for the
periods of time listed below, provided there has been no abuse, neglect or improper maintenance of your small off-road engine.
Your emission control system includes par ts such as the carburetor, air cleaner, ignition system, muffler and catalytic converter. Also included may be
connectors and other emission related assemblies.
Where a warrantable condition exists, Briggs & Stratton will repair your small off-road engine at no cost to you, including diagnosis, parts and labor.
Briggs & Stratton Emission Control Defects Warranty Coverage
Small off-road engines are warranted relative to emission control parts defects for a period of two years, subject to provisions set forth be low. If any
covered part on your engine is defectiv e, the part will be repaired or replaced Briggs & Stratton.
Owner’s Warranty Responsibilities
As the small off-road engine owner , y ou a re responsib l e f or the pe rf ormance of the requi red mainte nance listed in the Operat or’s Manual. Briggs & Stratton recommends that you retain all your receipts covering maintenance on your small off-road engine, but Briggs & Stratton cannot deny warranty solely
for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance.
As the small off-road engine owner, you should howe v er b e a war e that Briggs & Strat ton may deny you warranty coverage if your small off-road engine or
a part has failed due to abuse, neglect, improper maintenance or unapproved modifications.
You are responsible for presenting your small off-road engine to an authorized Briggs & Stratton service dealer as soon as a problem exists. The undisputed warranty repairs should be completed in a reasonable amount of time, not to exceed 30 days.
If you have any questions regarding your warranty rights and responsibilities, you should contact a B&S service representative at 1-414-259-5652.
The emission warranty is a defects warranty. Defects are judged on normal engine performance. The warranty is not related to an in-use emission test.
Briggs & Stratton Emission Control Defects Warranty Provisions
The following are specific provisions relative to your Emission Control Defects Warranty Coverage. It is in addition to the B&S engine warranty for nonregulated engines.
1. Warranted Parts — Coverage under this warranty extends only to the parts listed below (the emission control systems parts) to the extent these
parts were present on the engine purchased.
a. Fuel Metering System
• Cold start enrichment system
• Carburetor and internal parts
•Fuel pump
b. Air Induction System
• Air cleaner
• Intake manifold
c. Ignition System
• Spark plug(s)
• Magneto ignition system
d. Catalyst System
• Catalytic converter
• Exhaust manifold
• Air injection system, Pulse valve
e. Miscellaneous Items
• Vacuum, temperature, position, time sensitive valves and switches
• Connectors and assemblies
2. Length of Coverage — Briggs & Stratton warrants to the initial owner and each subsequent purchaser that the Warranted Parts shall be free from
defects in materials and workmanship which caused the failure of the Warranted Parts for a period of two years from the date the engine is
delivered to a retail purchaser.
3. No Charge — Repair or replacement of any Warranted Part will be performed at no charge to the owner, including diagnostic labor which leads to
the determination that a Warranted Part is defective, if the diagnostic work is performed at an authorized Briggs & Stratton service dealer. For
emission warranty service contact your nearest authorized Briggs & Stratton service dealer as listed in the “Yellow Pages” under “Engines,
Gasoline,” “Gasoline Engines,” “Lawn Mowers, ” or similar category.
4. Claims and Coverage Exclusions — Warranty claims shall be filed in accordance with the provisions of the B&S Engine Warranty Policy. Warranty
coverage shall be excluded for failures of Warranted Parts which are not original Briggs & Stratton parts or because of abuse, neglect or improper
maintenance as set forth in the B&S Engine Warranty Policy. Briggs & Stratton is not liable to cover failures of Warranted Parts caused by the use
of add-on, non-original, or modified parts.
5. Maintenance — Any Warranted Part which is not scheduled for replacement as required maintenance or which is scheduled only for regular
inspection to the effect of “repair or replace as necessary” shall be warranted as to defects for the warranty period. Any Warranted Part which is
scheduled for replacement as required maintenance shall be warranted as to defects only for the period of time up to the first scheduled
replacement for that part. Any replacement part that is equivalent in performance and durability may be used in the performance of any
maintenance or repairs. The owner is responsib l e for the performance of all required maintenance, as defined in the Operator’s Manual.
6. Consequential Coverage — Coverage hereunder shall extend to the failure of any engine components caused by the failure of any Warranted Part
still under warranty.
2
CONTENTS
Section Page
Emission Control Systems Warranty ... 2
Tractor and Deck Preparation.............. 3
Safe Operation Practices..................... 4
Product Graphics................................. 7
To The Owner .......... ... ... ... ................. 8
Calling Service Information.................. 8
Recording Model & Serial Number ...... 8
I Controls and Indicators........................ 9
II Operation............................................. 14
III Adjustments......................................... 18
IV Maintenance ........................................ 23
V Mower Deck......................................... 33
TRACTOR AND DECK PREPARATION
Section Page
VI Off-Season Storage ............................. 45
VII Mowing................................................. 46
Optional Equipment and Accessories. 47
Maintenance Chart............................... 48
Trouble Shooting.................................. 49
Lubrication Table ............................... 51
Lubrication Guides .............................. 52
Slope Gauge........................................ 55
Specifications....................................... 57
Warranty — Commercial Use .............. 58
Warranty — Residential Use................ 59
Maintenance Parts Chart .................... 60
After removing the top of the shippin g crate, cut the tie
strap securing the mower deck to th e side panel of the
crate. Using a hoist, or with the help of an assistant,
carefully lift the mower deck out of the shipping crate.
Cut the tie strap securing the PTO belt and remove the
belt from the deck
A. INSTALL LIFT ASSIST SPRINGS
The RH and LH lift assist rods are installed on the tractor
and suspended with rubber bands during shipment.
Remove the rubber bands and install the lift assist
springs as follows:
1. Raise the rearward end of the RH lift assist rod
located under the fender on th e right/rear side of th e
tractor frame, and remove the internal cotter pin
from the forward end of the rod.
2. Slide the larger hook of the lift assist spring onto
the forward end of the lift assist rod.
INTERNAL
COTTER PIN
3. Install the internal cotter pin to capture the spring
hook between the flange of the rod and the pin.
4. While lowering the rear end of the lift assist rod,
guide the other spring hook into the pigtail hoo k at
the lower front of the fender.
5. Tension the spring by pushing downward and then
inward on the rear of the lift assist rod so that the
flange at rearward end of the rod is inside the
tractor frame.
6. Repeat steps 1 thru 5 to install the lift assist spring
onto the LH lift assist rod on the left side of the
tractor frame.
NOTE: Store the lift assist springs in this position whenever the mower deck is removed from the tractor.
B. CONNECT THE BATTERY
WARNING
Battery posts, terminals and related accessories
contain lead and lead compounds. Wash hand s
after handling.
LIFT
ASSIST
SPRING
LIFT ASSIST
ROD
Installing Lift Assist Springs in Storage Position.
PIGTAIL
HOOK
The tractor is shipped with an activated sealed battery,
with the positive battery cable factory connected. The
negative cable must be connected.
Note: Make sure the ignition switch is in the "OFF" position before attaching the battery cable.
1. Pull the protective cap off the negative terminal of
the battery, and remove the hex cap screw and nut
from the free end of the negative battery cable.
2. Connect the negative battery cable (heavy black)
and ground wire (green) to negative terminal (—)
of the battery using the hex cap screw and nut.
Slide the black terminal cover over the negative
terminal of the battery.
3
WARNING
• The engine exhaust, some of its constituents, and certain vehicle compone nts 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). 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 to federal lands. A spark arrester muffler is available
at your nearest engine authorized service center.
IMPORTANT
THIS SYMBOL POINTS OUT IMPORTANT SAFETY INSTRUCTIONS WHICH, IF NOT FOLLOWED,
COULD ENDANGER THE PERSONAL SAFETY AND/OR PROPERTY OF YOURSELF AND
OTHERS. READ AND FOLLOW ALL INSTRUCTIONS IN THIS MANUAL BEFORE ATTEMPTING
TO OPERATE YOUR UNIT. FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT
IN PERSONAL INJURY. WHEN YOU SEE THIS SYMBOL— HEED ITS WARNING.
Your lawn mower was built to be operated according to the rules for safe operation
in this manual. As with any type of power equipment, carelessness or error on the
DANGER
I. GENERAL OPERATION
1. Read, understand and follow all instructions in the
manual and on the machine before starting. Keep
this manual in a safe place for future and regular
reference and for ordering replacement parts
2. Only allow responsible individuals familiar with
the instructions to operate the machine. Know the
controls and how to stop the machine quickly.
3. Do not put hands or feet under the cutting deck or
near rotating parts.
4. Clear the area of objects such as rocks, toys,
wire, etc. which could be picked up and thrown by
the blades. A small object may have been
overlooked and could be accidentally thrown by
the mower in any direction and cause injury to
you or a bystander. To help avoid a thrown
objects injury, keep children, animals, bystanders
and helpers at least 75 feet from the mower while
it is in operation. Always wear safety glasses with
side shields or safety goggles during operation or
while performing an adjustment or repair, to
protect eyes from foreign objects. Stop the blades
when crossing gravel drives, walks or roads.
part of the operator can result in injury. This lawn mower is capable of amputating
hands and feet or throwing objects. Failure to observe the following safety
instructions could result in serious injury or death.
SAFE OPERATION PRACTICES
5. Be sure the area is clear of other people before
mowing. Stop machine if anyone enters the area.
6. Never carry passengers.
7. Disengage the blades before shifting into reverse
and backing up. Always look down and behind
before and while backing.
8. Be aware of the mower and attachment discharge
direction and do not point it at anyone. Do not
operate the mower without either the entire grass
catcher or the chute guard in place.
9. Slow down before turning. Operate the machine
smoothly. Avoid erratic operation and excessive
speed.
10. Never leave a running machine unattended.
Always turn off the blades, place the transmission
in neutral, set the parking brake, stop the engine
and remove key before dismounting.
11. Turn off blades when not mowing.
12. Stop the engine and wait until the blades come to
a complete stop before (a) removing the grass
catcher or unclogging chute, or (b) making any
repairs, adjusting or removing any grass or debris.
4
13. Mow only in daylight or good artificial light.
DO:
14. Do not operate the machine while under the
influence of alcohol or drugs.
15. Watch for traffic when operating near or crossing
roadways.
16. Use extra care when loading or unloading the
machine into a trailer or truck. This unit should not
be driven up or down a ramp onto a trailer or truck
under power, because the unit could tip over
causing serious personal injury. The unit must be
pushed manually on a ramp to load or unload
properly.
17. Never make a cutting height adjustment while the
engine is running if the operator must dismount to
do so.
18. Wear sturdy, rough-soled work shoes and closefitting slacks and shirts. Do not wear loose fitting
clothes or jewelry. They can be caught in moving
parts. Never operate a unit in bare feet, sandals
or sneakers.
19. Check overhead clearance carefully before
driving under power lines, wires, bridges or low
hanging tree branches, before entering or leaving
buildings, or in any other situation where the
operator may be struck or pulled from the unit,
which could result in serious injury.
20. Disengage all attachment clutches, thoroughly
depress the brake pedal and shift into neutral
before attempting to start the engine.
21. Your mower is designed to cut normal residential
grass of a height no more than 10”. Do not
attempt to mow through unusually tall, dry grass
(e.g. pasture) or piles of dry leaves. Debris may
build up on the mower deck or contact the engine
exhaust presenting a potential fire hazard.
22. Use only accessories approved for this machine
by Cub Cadet. Read, understand and follow all
instructions provided with the approved
accessory.
II. SLOPE OPERATION
Slopes are a major factor related to loss of contro l and
tip-over accidents, which can result in severe injury or
death. All slopes require extra caution. If you cannot
back up the slope or if you feel uneasy on it, do not
mow it.
For your safety, use the slope gauge included as part
of this manual to measure slopes before operat ing this
unit on a sloped or hilly area. If the slope is greater
than 15° as shown on the slope gauge, do not operate
this unit on that area or serious injury could result.
Mow up and down slopes, not across.
Remove obstacles such as rocks, limbs, etc.
Watch for holes, ruts or bumps . Uneven terrain could
overturn the machine. Tall grass can hide obstacles.
Use slow speed. Choose a low enough gear so that
you will not have to stop or shift while on the slope. Always keep the machine in gear when going down
slopes to take advantage of engine braking action.
Follow the manufacturer’s recommendation s for wheel
weights or counterweights to improve stability.
Use extra care with grass catchers or other attachments. These can change the stability of the machine.
Keep all movement on the slopes slow and gradual.
Do not make sudden changes in speed or direction.
Rapid engagement or braking could cause the front of
the machine to lift and rapidly flip over backwards,
which could cause serious injury.
Avoid starting or stopping on a slope. If the tires lose
traction, disengage the blades and proceed slowly
straight down the slope.
DO NOT:
Do not turn on slopes unless necessary; then, turn
slowly and gradually downhill, if possible.
Do not mow near drop-offs, ditches or emb ankme nts.
The mower could suddenly turn over if a wheel is over
the edge of a cliff or ditch, or if an edge caves in.
Do not mow on wet grass. Reduced traction could
cause sliding.
Do not try to stabilize the machine by putting your foot
on the ground.
Do not use the grass catcher on steep slopes.
III. CHILDREN
Tragic accidents can occur if the operator is not alert
to the presence of children. Children are often
attracted to the machine and the mowing activity.
Never assume that children will remain where you
last saw them.
1. Keep children out of the mowing area and in
watchful care of an adult other than the operator.
2. Be alert and turn the machine off if children enter
the area.
3. Before and when backing up, look behind and
down for small children.
4. Never carry children, even with the blades off.
They may fall off and be seriously injured or may
interfere with safe machine operation.
5
5. Never allow children under 14 years old to
operate the machine. Children 14 years and over
should only operate the machine under close
parental supervision and proper instruction.
6. Use extra care when approaching blind corners,
shrubs, trees or other objects that may obscure
your vision of a child or other hazard.
7. Remove the key when the machine is left
unattended to prevent unauthorized operation.
IV. SERVICE
1. Use extreme care in handling gasoline and other
fuels. They are extremely flammable and the
vapors are explosive.
a. Use only an approved container.
b. Never remove fuel cap or add fuel with the en-
gine running. Allow the engine to cool at least
two minutes before refueling.
c. Replace the fuel cap securely and wipe off any
spilled fuel before starting the engine as it may
cause a fire or explosion.
d. Extinguish all cigarettes, cigars, pipes and oth-
er sources of ignition.
e. Never refuel the machine indoors because fuel
vapors will accumulate in the area.
f. Never store the fuel container or machine
inside where there is an open flame or spark,
such as a gas hot water heater, space hea ter
or furnace.
2. Never run a machine inside a closed area.
3. To reduce fire hazard, keep the machine free of
grass, leaves or other debris build-up. Clean up
oil or fuel spillage. Allow the machine to cool at
least 5 minutes before storing.
4. Before cleaning, repairing or inspecting, make
certain the blade and all moving parts have
stopped. Disconnect the spark plug wire, and
keep the wire away from the spark plug to prevent
accidental starting.
5. Check the blade and engine mounting bolts at frequent intervals for proper tightness. Also visually
inspect blades for damage (e.g., excessive wear,
bent, cracked). Replace with blades which meet
original equipment specifications.
6. Keep all nuts, bolts and screws tight to be sure
the equipment is in safe working condition.
7. Never tamper with safety devices. Check their
proper operation regularly. Use all guards as
instructed in this manual.
8. After striking a foreign object, stop the engine,
remove the wire from the spark plug and
thoroughly inspect the mower for any damage.
Repair the damage before restarting and
operating the mower.
9. Grass catcher components are subject to wear,
damage and deterioration, which could expose
moving parts or allow objects to be thrown. For
your safety protection, frequently check the
components and replace with manufacturer’s
recommended parts when necessary.
10. Mower blades are sharp and can cut. Wrap the
blades or wear gloves, and use extra caution
when servicing blades.
11. Check brake operation frequently. Adjust and
service as required.
12. Muffler, engine and belt guards become hot
during operation and can cause a burn. Allow to
cool down before touching.
13. Do not change the engine governor settings or
overspeed the engine. Excessive engine speeds
are dangerous.
14. Observe proper disposal laws and regulations.
Improper disposal of fluids and materials can
harm the environment and the ecology.
a. Prior to disposal, contact your local
Environmental Protection Agency to
determine the proper method for disposing of
the waste. Recycling centers are established
to properly dispose of materials in an
environmentally safe fashion.
b. Use proper containers when draining fluids.
Do not use food or beverage containers that
may mislead someone into drinking from
them. Properly dispose of the containers immediately following the draining of fluids.
c. DO NOT pour oil or other fluids into the
ground, down a drain or into a stream, pond,
lake, or other body of water. Observe Environmental Protection Agency regulations when
disposing of oil, fuel, coolant, brake fluid, filters, batteries, tires and other harmful waste.
15. We do not recommend the use of a pressure
washer or garden hose to clean your unit. They
may cause damage to electrical components;
spindles; pulleys; bearings; or the engine. The
use of water will result in shortened life and
reduce serviceability.
WARNING - YOUR RESPONSIBILITY: Restrict the use of this power machine to persons who
read, understand and follow the warnings and instructions in this manual and on the machine.
6
PRODUCT GRAPHICS
Keep product safety graphics (decals) clean. Replace
any safety graphic that is dam aged, destroyed, miss-
STARTING INSTRUCTIONS
BE FAMILIAR WITH CONTROLS BEFORE
1.
STARTING ENGINE AND OPERATING.
2.
SET CHOKE, MOVE THROTTLE TO MID
POSITION AND DEPRESS BRAKE PEDAL.
TURN KEY TO THE START POSITION.
3.
AFTER ENGINE STARTS OPEN CHOKE.
4.
STOPPING INSTRUCTIONS
1.
DISENGAGE PTO AND SET PARKING BRAKE.
2.
MOVE THROTTLE CONTROL TO MID
POSITION AND TURN KEY OFF.
WARNING
!
•
AVOID SERIOUS INJURY OR DEATH.
•
READ OPERATORS MANUAL AND ALL
WARNING LABELS BEFORE USING
MACHINE.
•
GO UP AND DOWN SLOPES, NOT ACROSS.
•
AVOID SUDDEN TURNS.
•
DO NOT OPERATE UNIT WHERE IT COULD
SLIP OR TIP.
•
IF MACHINE STOPS GOING UPHILL, STOP
PTO AND BACK DOWN HILL SLOWLY.
•
DO NOT MOW WHEN CHILDREN OR
OTHERS ARE AROUND.
•
NEVER CARRY CHILDREN.
•
LOOK DOWN AND BEHIND BEFORE AND
WHILE BACKING.
•
KEEP SAFETY DEVICES [GUARDS, SHIELDS,
AND SWITCHES] IN PLACE AND WORKING.
•
REMOVE OBJECTS THAT COULD BE
THROWN BY THE BLADES.
•
KNOW LOCA TION AND FUNCTION OF ALL
CONTROLS.
•
BE SURE THE BLADES AND THE ENGINE
ARE STOPPED BEFORE PLACING HANDS
OR FEET NEAR BLADES.
•
BEFORE LEAVING OPERATOR'S
POSITION, DISENGAGE PTO, ENGAGE
BRAKE LOCK, SHUT OFF ENGINE AND
REMOVE KEY.
ing, painted over or can no longer be read. Replacement safety graphics are available through your
dealer.
KEEP HANDS AND FEET AWAY FROM
ROTATING PARTS
REMOVE OBJECTS THAT CAN BE
THROWN BY THE BLADE IN ANY
DIRECTION. WEAR SAFETY GLASSES.
DO NOT MOW WHEN CHILDREN OR
OTHERS ARE AOUND. NEVER CARRY
CHILDREN
USE EXTRA CAUTION ON SLOPES. DO
NOT MOW SLOPES GREATER THAN 15°.
MOW UP AND DOWN, NOT ACROSS
READ OPERATOR'S MANUAL. KEEP SAFETY DEVICES WORKING.
AVOID SUDDEN TURNS, USE LOW GEAR
.
.
.
.
SAFETY GRAPHIC – LOCATED ON
LEFT SIDE OF MOWER DECK
DEFLECTOR and SAFETY GRAPHIC –
LOCATED ON RIGHT SIDE OF DECK
GENERAL SAFETY INSTRUCTIONS
WARNING – LOCATED ON RIGHT
SIDE OF RUNNING BOARD
TO REDUCE THE RISK OF INJU R Y, DO NOT
OPERATE
GRASS CATCHER IS IN ITS PROPER PLACE.
IF
UNLESS DISCHARGE COVER OR
DAMAGED, REPLACE IMMED IATELY.
HANDS AND FEET SAFETY GRAPHIC–
LOCATED ON DEFLECTOR CHUTE
SAFETY GRAPHIC – LOCATED
ON LEFT SIDE OF DECK
7
TO THE OWNER
This Operator’s Manual is an important part of your new tract or. The infor mation cont ained in this manual ha s been
prepared in detail to help you better understand the features, correct operation, adjustments, and maintenance of
your tractor. The performance and dependability of this tractor rely greatly on the manner in which it is operated and
maintained. Therefore, it is recommended that all oper ators of the tracto r carefully read this manual an d fully understand its operation. Also keep the manual availabl e for ref erence to en sure prop er operatio n, and that ma intenance
procedures are performed as scheduled to assure the tractor’s optimal mechanical condition.
NOTE: All references to LEFT, RIGHT, FRONT, and REAR, unless specifically state d otherwise, indica te th at rela-
tive position on the tractor when facing forward while seated in the operator’s seat.
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 .
Your local authorized Cub Cadet dealer is interested in the performa nce you rece ive from your tractor, an d with the
maintenance needed to ensure the satisfactory operation of your tractor. The dealer has tr a i ne d ser vice p er s o nn e l
familiar with the latest servicing information, is equipped with the latest tools, and has a complete line of genuine
Cub Cadet service parts which assure proper fit and high quality.
CALLING SERVICE INFORMATION
The engine manufacturer is responsible for all engine -related issues with regards to perfo rmance, power-rating, and
specifications.
If you have difficulties with the tractor and/ or equipment; have any questions rega rding the operation or maintenance
of this equipment; or desire additional information not found in this manual, contact your nearest authorized Cub
Cadet dealer. If you need assistance in locating a dealer in your area, conta ct the Customer Dealer Referr al Line by
calling:
1-877-282-8684
Or you may contact Cub Cadet via the internet by logging on to our Web Site at:
www.cubcadet.com
To obtain top performance and assure economical operation, the tractor should be inspected by your authorized
dealer periodically or at least once a year, depending on its hours of use. Before calling your dealer, make sure that
you have your model number(s) and manufacturing date available for the dealer.
RECORDING MODEL AND SERIAL NUMBER INFORMATION
Product identification plates are provided for major components of your tractor. The numbers on these plates are
important if your tractor should require dealer service, or if you need additional information on your tractor. Prior to
using your tractor for the first time, record th e nu m be rs fr om the identification plates in the appropriate spaces provided below.
The chassis model plate, showing the factory model number and Mfg. Date (See Figure 1) can be found on the
underside of the seat mounting base. Pivot the seat foward to locate the decal.
The engine serial number decal (See Figure 2) is located on the en gine blower housing.
Hood Model Factory Model No. Mfg. Date
Delivery Date Engine Model/Type Code.
XXXXXXXXXXX XXXXXXXXXX
Model Number Mfg. Date
CUB CADET LLC
www.cubcadet.com
DEALER LOCATOR PHONE NUMBER:
P. O. BOX
CLEVELAND, OH 44136
361131
877-282-8684
Engine Label
Figure 1 Figure 2
8
SECTION I. CONTROLS AND INDICATORS
Your Cub Cadet Tractor has been safety engineered.
This section gives a brief description of the function
and location of the various controls and indicators.
AB
F
E
H
G
Thoroughly acquaint yourself with all the cont rols and
indicators before attempting to start or operate the
tractor.
I
C
J
D
K
N
A. Low Oil Indicator
B. Hour Meter
C. Power Take-Off (PTO) Control Switch
D. Ignition/Light Switch
E. Throttle Control Lever
F. Choke Control
G. Brake Pedal Lock
H. Cruise Control Lever
L
O
M
I. Brake Pedal
J. Forward Control Pedal
K. Reverse Control Pedal
L. Lift Handle
M. Lift Height Indicator
N. Seat Adjustment Lever
O. Transmission Release Lever
P. Fuses (Not Shown)
Q. Safety Interlock Switches (Not Shown)
Figure 3
9
A. LOW OIL INDICATOR
This indicator will illuminate when the engine oil level is
low. If this indicator illuminates, stop the tractor immediately and check the engine oil level. If the oil level is
within the operating range, but the light remains on,
contact your Cub Cadet dealer.
E. THROTTLE CONTROL LEVER
This lever controls the speed of the engine. When
set in a given position, the control cable will maintain
a uniform engine speed.
NOTE
CAUTION
Operating the tractor with low oil level or pressure could result in severe engine damage.
B. HOUR METER
The hour meter operates whenever the ignition key is
in the “ON” position. Record the actual hour s of tr actor
operation to ensure all maintenance procedures are
completed according to the schedule in this manual.
C. POWER TAKE–OFF (PTO) CONTROL SWITCH
The power take-off control switch operates the front
electric PTO clutch. Pull the switch knob to engage
(“RUN”), or push the knob to disengage (“OFF”) the
PTO clutch.
D. IGNITION/LIGHT SWITCH
WARNING
To prevent accidental starting and/or battery
discharge, remove the key from the ignition
switch when the tractor is not in use.
The combination lights and ignition switch is a four
position switch. (See Figure 4)
When using power take-off operated equipment, best performance is achieved with the
throttle lever in the “FAST” position.
This symbol shows slow position.
This symbol shows fast position.
F. CHOKE CONTROL
The choke control is operated manually. Pull the
knob out to ckoke the engine; push the knob in to
open the choke.
G. BRAKE PEDAL LOCK
WARNING
The hydrostatic transmission will not hold the
tractor on a hill. Normal internal leakage in the
transmission will allow the tractor to roll downhill. To avoid an accident and/or possible injury, engage the brake pedal lock.
The brake lock lever, located in the center of the
dash panel below the steering wheel, is identified
with the symbol. Always engage the brake
pedal lock when dismounting the tractor. To engage
the brake pedal lock, depress the brake pedal and
push down on the brake pedal lock lever. Hold the
lever down while releasing the brake pedal. The lever should lock in the down position.
P
Figure 4
H. CRUISE CONTROL LEVER
The cruise control lever, located in the center of the
dash panel below the steering wheel, is identified with
the symbol. This lever can be used to maintain a desired “foot free” forward speed in areas
where constant speed changes are not required. Refer to Section II- OPERATION for instructions on how
to use this feature.
10
I. BRAKE PEDAL
The brake pedal is located at the front of the right running board above the forward control pedal. Press
down to stop the tractor and disengage the cruise control. The brake pedal must be fully depressed to activate the safety interlock switch when starting the
tractor.
J. FORWARD CONTROL PEDAL
The forward control pedal is located at the front of the
right running board below the brake pedal. Slowly
press down on the pedal to start moving forward. The
forward ground speed of the tractor is directly affected
by the distance the pedal is depressed.
K. REVERSE CONTROL PEDAL
WARNING
Check behind the tractor to be sure the area is
clear of people, pets or obstacles. Use a slower
speed to maintain control of the tractor when
traveling in reverse.
The reverse control pedal is located in the right front
running board rearward of the the brake and forward
control pedals. Press the pedal downward to move in
reverse.
L. LIFT HANDLE
The lift handle is located in the left fender and is used
to raise and lower equipment used with the tractor. The
equipment can be set in any of six positions by depressing the top button on the handle, moving the handle to the desired position, then releasing the butt on. It
may be necessary to push or pull slightly on the handle
to depress the button. There is a lift assist spring which
reduces the effort needed to lift at tachments. To adjust
spring tension refer to ADJUSTMENTS in Section III.
Figure 5
O. TRANSMISSION RELEASE LEVER
The transmission release lever is located at the back of
the tractor in the rear drawbar. When engaged, this lever opens a hydrostatic pump bypass valve, which allows the tractor to be pushed short distances by hand.
To engage the release lever, lift and pull the lever rearward through the keyhole until the flange on the rod is
outside the drawbar. Lower the lever up into the slot
and release. To disengage the release lever, pull back
on the lever, lift out of the slot and release.
P. FUSES
The fuses are located under the hood between the indicator lamps and the hour meter (see Figure 6). Fuses
are installed to protect the tractor’s electrical circuitry
and components from damage caused by excessive
amperage.
M. LIFT HEIGHT INDICATOR
The lift height indicator is located in the lef t f end er an d
indicates the height of the deck attachment when installed.
N. SEAT ADJUSTMENT LEVER
The seat adjustment lever (see Figure 5) is used to
move the seat forward or rearward into on e of five positions. See ADJUSTING THE SEAT in Section III.
Figure 6
11
Q. SAFETY INTERLOCK SWITCHES
HOOD AND SIDE PANELS
This tractor is equipped with a safety interlock system
for the protection of the operator. If the interlock system should ever malfunction, do not operate the tractor. Contact your authorized Cub Cadet Dealer. The
safety interlock system prevents the engine from
cranking or starting unless the brake pedal is fully depressed, and the PTO switch is in the “OFF” position.
The safety interlock system will automatically shut off
the engine if the operator leaves the seat before engaging the brake lock.
The safety interlock system will automatically shut off
the engine if the operator leaves the seat with t he PTO
in the “RUN” position, regardless of whether the brake
lock is engaged. The PTO switch must be moved to the
“OFF” position to restart the engine.
The safety interlock system will automatically shut off
the PTO if the reverse control pedal is depressed with
the PTO in the “RUN” position. To re-engage the PTO,
release the reverse control pedal, move the PTO
switch to the “OFF” position, then again pull the switch
to the “RUN” position.
FUEL TANK
The fuel tank is located under the rear fender. The filler
cap is in the center/rear of the fender (see Figure 7).
The tractor hood is arranged to swing up and forward
for easy access to the engine compartment (see Figure 8). Whenever engine maintenance is required, the
side panels can be removed.
WARNING
If the engine has been recently run, the engine,
muffler and surrounding metal surfaces will be
hot and can cause burns to the skin. Allow the
tractor to cool and use caution when removing
the side panels.
To remove either the right or left side panel, refer to
Figure 8 and proceed as follows:
1. Engage the brake lock and raise the hood.
2. Loosen, but do not remove, the rear wing nut and
upper front wing nut.
3. Grasp the side panel just behind the grille and pull
outward to release the side panel from the
tapered bushings on the grille.
4. Slide the side panel forward and out of the groo ve
in the dash panel.
Figure 7
To install either the right or left side pane l, refer to Figure 8 and proceed as follows:
1. Slide the rear of panel into the gro ove in the dash
panel.
2. Position the notch of the rear side panel tab on
the threads of the bulkhead rod, between the
bulkhead and wing nut.
3. Press the slots of the front side panel flange onto
the tapered retainers, between the retainers and
the grille.
4. Tighten the rear and upper front wing nuts and
close the hood.
12
UPPER FRONT
WING NUT
REAR WING NUT
SIDE PANEL
GROOVE IN
DASH PANEL
REAR TAB
ON PANEL
GRASP
RETAINER WITH
TAPERED GUIDE
GRILLE
GRASP
Figure 8
13
SECTION II. OPERATION
WARNING
Receive Instruction - Read the operator’s
manual. Learn to operate this machine
SAFELY. Don’t risk INJURY or DEATH.
1. Before starting the engine or beginning operation,
be familiar with the controls. The o perator mu st be
seated, the PTO switch in the “OFF” position and
the brake pedal fully depressed.
2. Keep all shields in place. Keep away from moving
parts.
3. NO RIDERS! Keep all people and pets a safe
distance away. Look behind to both sides before
backing up.
4. DO NOT direct the mower discharge at people.
5. Avoid slopes. Tractors can be rolled over.
6. Before leaving the operator’s seat: Shut off the
PTO, engage the brake pedal lock, shut off the
engine and remove the ignition key. Wait for a ll
movement to stop before servicing or cleaning.
7. Do not fill the fuel tank when the engine is running
or while the engine is hot. Tighten the fuel cap
securely.
BEFORE OPERATING YOUR TRACTOR
1. Before you operate the tractor, study this manual
carefully. It has been prepared to help you operate
and maintain your tractor with utmost efficiency.
2. Familiarize yourself with the operations of all the
instruments and controls.
3. This engine is certified to operate on unleaded
gasoline. Fill the fuel tank with only clean, fresh,
unleaded gasoline with a minimum of 85 octane.
Do not mix oil with gasoline. Purchase fuel in a
quantity that can be used within 30 days to assure
fuel freshness.
In countries other than the U.S.A., leaded gasoline
may be used if it is commercially available and unleaded is not available.
NOTE: Some fuels, called oxygenated or reformulated
gasolines, are gasoline blended with alcohols or
ethers. Excessive amounts of these blends can damage the fuel system or cause performance problems.
Do not use gasoline which contains Methanol. If any
undesirable operating symptoms occur, use gasoline
with a lower percentage of alcohol or ether.
4. Check the engine and transmission oil levels.
5. Clean the air cleaner element if necessary.
6. Check the tire inflation pressures.
7. Adjust the seat for operator’s maximum comfort,
visibility and for maintaining complete control of
the tractor.
8. Remove the side panels and clean any
accumulated grass and debris from the engine air
inlet screen. Also clean the dash air intake
screen, grille and side panels to ensure adequate
cooling.
9. Refer to the various sections of the Owner’s
Manual for additional information.
STARTING THE ENGINE
WARNING
For personal safety, the operator must be sitting
in the tractor seat when starting the engine.
WARNING
This unit is equipped with a safety inerlock
system designed for the protection of the
operator. Do not operate the tractor if any part
of the interlock system is malfunctioning.
Periodically check the functions of the interlock
system for proper operation as described
below:
• The safety interlock system prevents the en-
gine from cranking or starting unless the
brake pedal is fully depressed and the PTO
clutch engagement switch is in the “OFF” position.
• The safety interlock system will automatical-
ly shut off the engine if the operat or leaves
the seat before engaging the brake pedal
lock.
• The safety interlock system will automatical-
ly disengage the PTO if the reverse control
pedal is pressed down with the PTO in the
“RUN” position. To re-engage the PTO, release the reverse control pedal, move the
PTO switch into the “OFF” position and the n
engage the PTO while seated.
• The safety interlock system will automatical-
ly shut off the tractor engine if the operator
leaves the seat with the PTO in the “RUN”
position.
14
1. Operator must be sitting in the tractor seat.
2. Pull choke control knob to full choke position.
Less choking may be necessary due to variations
in temperature, grade of fuel, etc. Little or no
choking will be needed when the engine is warm.
3. Move the throttle lever to the “FAST” position.
4. Place the PTO switch in the “OFF” position.
5. Fully depress the brake pedal.
TRACTOR BREAK-IN PROCEDURE
CAUTION
Never operate a new engine immediately
under full load. Break it in carefully as shown
in the table below.
6. Turn the ignition key clockwise to the “START”
position and release it as soon as the engine
starts; however, do not crank the engine
continuously for more than 5 seconds at a time. If
the engine does not start within this time, turn the
key “OFF” and wait a minute to allow the engine’s
starter motor to cool, then try again.
7. After the engine starts, slowly release the brake
pedal. As the engine warms up, gradually push
the choke control knob all the way in. Do not use
the choke to enrich the fuel mixture, except as
necessary to start the engine.
NOTE
This engine is designed to give maximum
performance and service life if operated with the
choke fully open and the throttle in the “FAST”
position. To open the choke fully requires an
engine warmup period of several seconds to
several minutes, depending on the outdoor
temperature.
After starting the engine, push in the choke
control until the engine begins to run smoothly.
As the engine warms and begins t o run roughly,
continue to push in the choke control as
necessary to keep the engine running smoothly
until the choke is fully depressed. Operating
equipment during engine warmup is not
recommended.
STOPPING THE ENGINE
Engine Throttle
Period
1st hour X None
2nd hour
3rd through
12th hour
Control Lever
Position Load
1/2 3/4 Full
X
X
X
X
Light drawbar load
Mowing with tractor
at slow groundspeed
Medium drawbar
load
Normal mowing
COLD WEATHER STARTING
WARNING
Engine exhaust gases are dangerous. Do not
run the engine in a confined area such as a
storage building any longer than is necessary.
Immediately move the tractor outdoors.
WARNING
For personal safety, the operator must be sitting
in the tractor seat before starting the tractor.
or
or
CAUTION
Remove the key from the ignition switch to
prevent accidental starting or batter y dis c h arge
if the equipment is left unattended.
Place the PTO switch in the “OFF” position. Move the
throttle control lever to the “SLOW” position. Wait a
moment to allow the engine speed to stabilize, then
turn the ignition key to the “OFF” p osition. Remove th e
key from the ignition switch.
When starting the engine at temperatures near or below
freezing, ensure the correct viscosity motor oil is used in
the engine and the battery is fully charged. Start the engine as follows:
1. Pull the choke all the way out to full choke position.
2. Move the throttle control lever to the “FAST”
position.
3. Place the PTO switch in the “OFF” position.
4. Fully depress the brake pedal.
15
5. Turn the ingnition key to the “START” position and
hold until the engine starts; h o wev er, d o not cr ank
the engine continuously for more than 5 seconds
at a ti me . Once the engine starts, gradually adjust
the choke as needed to keep the engine running until
warmed up, then push the choke control all the way
in.
NOTE
If the engine fails to start after several attempts,
the engine may become flooded. If this
happens, wait a minute to allow the starter
motor to cool. Move the throttle control to the
“SLOW” position, push the choke in all the way
and momentarily crank the engine to help clear
the cylinders. With the throttle control in the
“SLOW” position and the choke all the way in,
turn the ignition key to the “START” position
while slowly pulling the choke out to a position
that will allow the engine to start. Gradually
adjust the choke as needed to keep the engine
running until warmed up, then push the choke
control all the way in.
DRIVING THE TRACTOR
CAUTION
Avoid sudden starts, excessive speed and
sudden stops.
CAUTION
CAUTION
Do not use the forward or reverse control
pedals to change the direction of travel when
the tractor is in motion. Use the brake pedal to
bring the tractor to a stop before depressing
either the forward or reverse control pedal.
a. To move forward, slowly depress the forward
control pedal until the desired speed is
achieved.
b. To move in reverse, check that the area be-
hind is clear then fully depress the reverse
control pedal.
3. Using the cruise control lever.
NOTE
The cruise control feature can only be ope rated
in the forward direction.
a. Slowly depress the forward control pedal until
the desired speed is achieved.
b. Lightly push the cruise control lever downward
as far as possible and hold in this position.
c. While continuing to hold the cruise lever down,
lift your foot from the forward control pedal
(you should feel the cruise latch engage).
d. If properly engaged, the cruise lever and for-
ward control pedal should lock in the down position, and the tractor will maintain the same
forward speed.
Do not leave the seat of the tractor without
disengaging the PTO, depressing the brake
pedal and engaging the brake pedal lock. If
leaving the tractor unattended, also turn the
ignition key off and remove the key.
NOTE
When using power take-off operated
equipment, best performance is achieved with
the throttle lever in the “FAST” position.
1. Depress the brake pedal to re lease the brake pe dal
lock and let the pedal up. Move the throttle lever to
the position where the engine operates best for the
load to be handled.
2. Driving with forward or reverse pedals.
e. Disengage the cruise control using one of the
following methods:
• Depress the brake pedal to disengage the
cruise control and stop the tractor.
• Lightly depress the forward control pedal.
• Lift the cruise control lever upward.
NOTE
Although not recommended, depressing the
reverse pedal will also disengage the cruise
control.
f. To change to the reverse direction when oper-
ating with cruise control, depress the brake
pedal to disengage the cruise contr ol and stop
the tractor; then depress the reverse control
pedal.
16
DRIVING ON SLOPES
Refer to the SLOPE GAUGE on page 55 to help determine slopes where you may not operate safely.
WARNING
Do not mow on inclines with a slope in excess
of 15 degrees (a rise of approximately 2-1/2 f eet
every 10 feet). The tractor could overturn and
cause serious injury.
WARNING
Operate the tractor up and down slopes, never
across slopes. Always drive up or down the face
of a slope. Do not drive so that the tractor may
tip over sideways .
Before operating the tractor on any slope, walk the
slope to look for possible hazards such as rocks.
mounds, ruts, stumps or other surface irregularities
which could cause the tractor to be upset.
Back the tractor with implement up the steepest portion
of each slope you intend to work . If the tractor ca nnot
negotiate the slope in reverse, the slope is too steep to
be worked.
Avoid turns when driving on a slope. If a turn must be
made, turn down the slope. Turning up a slope grea tly
increases the chance of a roll over.
Avoid stopping when driving up a slope. If it is necessary to stop while driving up a slope, start up smoot hly
and carefully to reduce the possibility of flipping the
tractor over backward.
STOPPING THE TRACTOR
1. Start and run the engine a few minutes to warm u p.
2. With the mowing deck, snow thrower, etc. installed
and the engine running at approximately 50%
throttle, engage and disengage the clutch at ten
second intervals (ten seconds ON-ten seconds
OFF) five times. The engine choke may have to
be pulled out slightly to accomplish this.
3. Increase the engine speed to 75% throttle and
again engage and disengage the PTO clutch at
ten second intervals five times.
4. Make certain the PTO is disengaged and stop the
engine.
Operate the PTO clutch as follows:
1. Move the throttle control lever to approxima tely the
mid throttle position.
2. Pull the PTO switch to the “RUN” position.
3. Advance the throttle lever to the operating speed
(full engine speed).
4. The operator must remain in the tractor seat at all
times. If the operator should leave the seat
without turning off the power take-off switch, the
tractor’s engine will shut off.
5. The PTO clutch cannot be operated when the
tractor is driving in the reverse direction. The PTO
switch must in the “OFF” position when the
reverse control pedal is depressed, or the PTO
clutch will automatically disengage. To re-eng a ge
the PTO clutch, release the re ve rs e co nt ro l p e da l,
move the PTO switch to the “OFF” position, then
again pull the switch to the “RUN” position.
DRAWBAR
Drawbar type equipment must be hitched to the tractor
only at the hitch hole in the drawbar (See Figure 9).
CAUTION
Always engage the brake pedal lock, push the
PTO switch to the “OFF” position, lower the
equipment and shut off the engine before
dismounting. Never try to start the engine while
standing on the ground.
Fully depress the brake pedal to bring the tractor t o a
complete stop (and disengage the cruise control), engage the brake pedal lock, disengage the PTO, turn
the ignition switch to “OFF’” and remov e the key from
the switch before dismounting.
OPERATING THE POWER TAKE-OFF (PTO) CLUTCH
Before operating the new clutch under load (mowing
grass, etc.), perform the following break-in procedure:
DRAWBAR
HITCH HOLE
Figure 9
17
SECTION III. ADJUSTMENTS
This section contains adjustment information for the
Model GT 2521 tractor. Adjustmen t information for the
48 inch deck is located in Section V – Mower Deck
beginning on page 33.
ADJUSTING THE SEAT
WARNING
Do not adjust the seat when the tractor is
moving. Adjusting the seat while the tractor is
moving could cause the operator to lose control
of the tractor.
Before starting the tractor, adjust the seat forward or
rearward to the most comfortable driving position. To
reposition the seat, move the seat adjustment lever
(see Figure 10) upward and slide the seat forward or
rearward. Release the adjustment lever when th e seat
is comfortably positioned. Gently rock the seat forwar d
or rearward to be sure the seat is locked in place.
To adjust the braking force, refer to Figure 11 and
proceed as follows:
1. Place the tractor on a level surface with the brake
pedal lock disengaged. Stop the tractor engine
and remove the ignition key.
2. While working from the underside of the tractor,
facing the threaded end of the rod:
• Remove the internal cotter pin from the brake
rod adjustment ferrule and disconnect the ferrule from the brake cam.
• Loosen the hex jam nut from against the ferrule.
To increase the braking force—
Turn the ferrule clockwise (inward) one full turn at
a time until the ferrule can be inserted into the
brake cam while applying a minimal tension on
the spring.
To decrease the braking force—
Turn the ferrule counterclockwise (outward) one
full turn at a time until the ferrule can be inserted
into the brake cam while applying a minimal
tension on the spring.
3. Turn the ferrule counterclockwise (outward) one
full turn to release the slight spring tension.
Tighten the jam nut against the ferrule, then insert
the ferrule into the brake cam and secure with the
internal cotter pin.
Figure 10
ADJUSTING THE BRAKES
During normal operation of this tractor, the brakes are
subject to wear and will need periodic examination and
adjustment.
To check the brake adjustment, position the tractor on
a firm and level surface. Stop the tractor engine and
remove the ignition key. Pull and lock the transmission
release lever in the “TRANSMISSION RELEASED”
position. Perform the following checks:
1. Engage the brake pedal lock. If the tractor can be
pushed forward or rearward, the braking force
must be increased.
2. Release the brake pedal lock. If the tractor cannot
be pushed forward or rearward, the braking force
must be decreased.
BRAKE
CAM
HEX JAM NUT
ADJUSTMENT
FERRULE
INTERNAL
COTTER PIN
BRAKE ROD
SPRING
Figure 11. Viewed from top (fender off).
Recheck the brake adjustment to ensure proper brake
operation before operating the tractor. If brake rod
adjustment does not correct the problem, see your
authorized Cub Cadet dealer.
18
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