Operator’s Manual 21” Rear & Side Discharge Mulching Mower Model PR-521 (11A-438C100) 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 forestcovered, 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 368023 Cleveland, Ohio 44136-9722. CUB CADET CORP. P.O. BOX 368023 CLEVELAND, OHIO 44136-9722 PRINTED IN U.S.A. FORM NO. 770-10088A.fm (12/99) TABLE OF CONTENTS Content Page Important Safe Operation Practices................................................................... 3 Slope Gauge...................................................................................................... 6 Assembling Your Lawn Mower........................................................................... 7 Know Your Lawn Mower .................................................................................... 9 Operating Your Lawm Mower ............................................................................ 9 Making Adjustments .......................................................................................... 10 Maintaining Your Lawn Mower........................................................................... 11 Off-Season Storage ........................................................................................... 13 Troubleshooting ................................................................................................. 13 Parts List............................................................................................................ 14 FINDING MODEL NUMBER This Operator’s Manual is an important part of your new lawn mower. It will help you assemble, prepare and maintain the unit for best performance. Please read and understand what it says. Before you start assembling your new equipment, please locate the model plate on the equipment and copy the information from it in the space provided below. The information on the model plate is very important if you need help from our Customer Support Department or an authorized dealer. • You can locate the model number by standing at the operating position and looking down at the rear of the mower deck. A sample model plate is explained below. For future reference, please copy the model number and the serial number of the equipment in the space below. (Model Number) (Serial Number) Copy the model number here: Copy the serial number here: CUB CADET CORP. P.O. BOX 368023 CLEVELAND, OHIO 44136 CALLING CUSTOMER SUPPORT If you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance of this unit, please call the Customer Dealer Referral Line at the number given below. Call 1- (800)-528-1009 to reach the Cub Cadet Customer Dealer Referral Line or a Customer Support representative. Please have your unit’s model number and serial number ready when you call. See previous section to locate this information. You will be asked to enter the serial number in order to process your call . 2 SECTION 1: IMPORTANT SAFE OPERATION PRACTICES 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 lawn mower. Failure to comply with these instructions may result in personal injury. When you see this symbol, heed its warning. WARNING: The Engine Exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. DANGER: 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 part of the operator can result in serious injury. This lawn mower is capable of amputating hands and feet and throwing objects. Failure to observe the following safety instructions could result in serious injury or death. GENERAL OPERATION • • • • • • • Read this operator’s manual carefully in its entirety before attempting to assemble this machine. Read, understand, and follow all instructions on the machine and in the manual(s) before operation. Be completely familiar with the controls and the proper use of this machine before operating it. Keep this manual in a safe place for future and regular reference and for ordering replacement parts. Your rotary mower is a precision piece of power equipment, not a plaything. Therefore, exercise extreme caution at all times. Your unit has been designed to perform one job: to mow grass. Do not use it for any other purpose. Never allow children under 14 years old to operate a power mower. Children 14 years old and over should only operate mower under close parental supervision. Only responsible individuals who are familiar with these rules of safe operation should be allowed to use your mower. Keep the area of operation clear of all persons, particularly small children and pets. Stop engine when they are in the vicinity of your mower to help prevent blade contact or thrown object injury. Although the area of operation should be completely cleared of foreign objects, an object may have been overlooked and could be accidentally thrown by the mower in any direction and cause serious personal injury to the operator or any others allowed in the area. Wear sturdy, rough-soled work shoes and closefitting slacks and shirts. Shirts and pants that cover the arms and legs and steel-toed shoes are recommended. Do not wear loose fitting clothes or jewelry. They can be caught in moving parts. Never operate a unit in bare feet, sandals, slippery or light weight (e.g. canvas) shoes. Always wear safety glasses or safety goggles during operation or while performing an adjustment or repair, to protect eyes from foreign objects that may be thrown from the machine in any direction. Thoroughly inspect the area where the equipment is to be used. Remove all stones, sticks, wire, bones, toys and other foreign objects which could be • • • • • • • 3 picked up and thrown by the mower in any direction and cause serious personal injury to the operator or any others allowed in the area. Plan your mowing pattern to avoid discharge of material toward roads, sidewalks, bystanders and the like. To help avoid a thrown objects injury, keep children, bystanders and helpers at least 75 feet from the mower while it is in operation. Do not put hands or feet near or under rotating parts. Keep clear of discharge opening at all times as the rotating blade can cause injury. Many injuries occur as a result of the mower being pulled over the foot during a fall. Do not hang on to the mower if you are falling; release the handle immediately. Never pull the mower toward you while you are walking. If you must back the mower away from a wall or obstruction first look down and behind, and then follow these steps: a. Step back from the mower to fully extend your arms. b. Be sure you are well balanced with sure footing. c. Pull the mower back slowly, no more than half way toward you. d. Repeat these steps as needed. Do not operate the mower while under the influence of alcohol or drugs. Do not engage the self-propelled mechanism on units so equipped while starting engine. The blade control handle is a safety device. Never attempt to bypass its operation. Doing so makes the safety device inoperative and may result in personal injury through contact with the rotating blade. The blade control handle must operate easily in both directions and automatically return to the disengaged position when released. Never operate the mower in wet grass. Always be sure of your footing. A slip and fall can cause serious personal injury. Keep a firm hold on the handle and walk, never run. If you feel you are losing your footing, RELEASE THE BLADE CONTROL HANDLE IMMEDIATELY and the blade will stop rotating within three seconds. • • • • • • • • Mow only in daylight or good artificial light. Stop the blade when crossing gravel drives, walks or roads. If the equipment should start to vibrate abnormally, stop the engine and check immediately for the cause. Vibration is generally a warning of trouble. Shut the engine off and wait until the blade comes to a complete stop before removing the grass catcher or unclogging the chute. The cutting blade continues to rotate for a few seconds after the engine is shut off. Never place any part of the body in the blade area until you are sure the blade has stopped rotating. Never operate mower without proper guards, grass catcher, plates or other safety protective devices in place. Muffler and engine become hot and can cause a burn. Do not touch. Only use accessories approved for this machine by the manufacturer. Read, understand, and follow all instructions provided with the approved accessory. If situations occur which are not covered in this manual, use care and good judgment. Contact your dealer for assistance. Telephone 1-800-800-7310 for the name of your nearest dealer. • • • • • Service • • • • Slope Operation • For your safety, use the slope gauge included as part of this manual to measure slopes before operating this unit on a sloped or hilly area. If the slope is greater than 15 degrees as shown on the slope gauge, do not operate this unit on that area or serious injury could result. • • • Do: • • • Mow across the face of slopes; never up and down. Exercise extreme caution when changing direction on slopes. Watch for holes, ruts, hidden objects, or bumps. Tall grass can hide obstacles. Always be sure of your footing. A slip and fall can cause serious personal injury. If you feel you are losing your balance release the blade control handle immediately and the blade will stop in less than 3 seconds. • • • Do NOT: • • • • Do not mow near drop-offs, ditches or embankments. The operator could lose footing or balance. Do not mow slopes greater than 15 degrees as shown on the slope gauge. Do not mow on wet grass. Reduced footing could cause slipping. • • Children • Never assume that children will remain where you last saw them. Keep children out of the mowing area and under the watchful care of a responsible adult other than the operator. Be alert and turn mower off if a child enters the area. Before and while moving backwards, look behind and down for small children or other objects. Never allow children under age 14 to operate the mower. Children 14 years of age and above should read and understand the operation instructions and safety rules in this manual. Use extreme care when approaching blind corners, shrubs, trees, or other objects that may obscure your vision of a child or hazard. • Tragic accidents can occur if the operator is not alert to the presence of children. Children are often attracted to the mower and the mowing activity. 4 Use extreme care in handling gasoline and other fuels. They are extremely flammable and the vapors are explosive. Use only an approved gasoline container. Never remove gas cap or add fuel while the engine is running. Allow engine to cool at least two minutes before refueling. Replace gasoline cap securely and wipe off any spilled gasoline before starting the engine as it may cause a fire or explosion. Extinguish all cigarettes, cigars, pipes and other sources of ignition. Never refuel machine indoors because flammable vapors will accumulate in the area. Never store the machine or fuel container inside where there is an open flame or spark such as a gas water heater, space heater, or furnace. Never run an engine inside a closed area. To reduce fire hazard, keep mower free of grass, leaves, or other debris build-up. Clean up oil or fuel spillage. Allow mower to cool at least 5 minutes before storing. 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. Check the blade and engine mounting bolts at frequent intervals for proper tightness. Also, visually inspect blade for damage (e.g., bent, cracked or worn). Replace with blade which meets original equipment specifications listed in this manual. Keep all nuts, bolts, and screws tight to be sure the equipment is in safe working condition. Never tamper with safety devices. Check their proper operation regularly. 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 starting and operating the mower. • • Never attempt to make a wheel or cutting height adjustment while the engine is running. Grass catcher components are subject to wear, damage and deterioration, which could expose moving parts or allow objects to be thrown. For safety protection, frequently check components and replace with manufacturer’s recommended parts, when necessary. • • Mower blades are sharp and can cut. Wrap the blade(s) or wear gloves, and use extra caution when servicing them. Do not change the engine governor setting or overspeed the engine. Excessive engine speeds are dangerous. 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. 129 9 AC • 5 6 IN WARNING 15° G NTIN E S E EPR E, R OPE ° SL 5 1 A Do not mow on inclines with a slope in excess of 15 degrees (a rise of approximately 2-1/2 feet every 10 feet). A riding mower could overturn and cause serious injury. If operating a walk-behind mower on such a slope, it is extremely difficult to maintain your footing and you could slip, resulting in serious injury. Operate RIDING mowers up and down slopes, never across the face of slopes. Operate WALK-BEHIND mowers across the face of slopes, never up and down slopes. DL TTE O D D ON FOL OR A FENCE POST A CORNER OF A BUILDING A POWER POLE SIGHT AND HOLD THIS LEVEL WITH A VERTICAL TREE USE THIS PAGE AS A GUIDE TO DETERMINE SLOPES WHERE YOU MAY NOT OPERATE SAFELY. SECTION 2: SLOPE GAUGE Use this page as a guide to determine slopes where you may not operate the lawn mower safely. SECTION 3: ASSEMBLING YOUR LAWN MOWER To Remove Unit From Carton • • • Remove staples, break glue on top flaps, or cut tape at carton end and peel along top flap to open carton. Remove loose parts if included with unit (i.e., operator’s manual, etc.). Cut along corners and lay carton down flat. Remove packing material. Roll or slide unit out of carton. Check carton thoroughly for loose parts. Tighten hand knob Tighten hand knob NOTE: Parts included for assembly of grass catcher are listed on page 8. Figure 2 Tools Required 1. Pair of Pliers 2. Funnel NOTE: Your mower is shipped with the handle in the higher height position. If you wish to lower the height of the handle, refer to the Adjustment Section at this time. Disconnect Spark Plug Wire • • • Before setting up your lawn mower, disconnect the spark plug wire from the spark plug. See Figure 1. Attach rubber boot to a bolt on the engine to ground as shown in the figure. Remove the hairpin clips from the outer hole in the weld pins on the handle mounting brackets. Using a pair of pliers, squeeze one leg of the lower handle against the handle mounting bracket. Insert the hairpin clip into the inner hole on the weld pin. Repeat on the other side. See Figure 3. Handle Mounting Bracket Spark Plug Wire Rubber Boot Spark Plug Insert hairpin clip here Hairpin Clip Weld Pin Figure 3 • Figure 1 IMPORTANT: This unit is shipped without gasoline or oil in the engine. Be certain to service engine with gasoline and oil before operating your mower. • NOTE: Reference to right or left hand side of the mower is observed from the operating position. • Setting Up Your Lawn Mower • • The rope guide is attached to the right side of upper handle. Loosen the wing nut which secures the rope guide. See Figure 4. With spark plug wire disconnected and grounded, hold the blade control handle against the upper handle, and pull the starter rope out of the engine. Release blade control handle. Slip the rope into the rope guide. Tighten the wing nut. See Figure 4. Tighten all nuts and bolts securely. Slip rope into rope guide Remove any packing material which may be between the upper and lower handles for shipping purposes. Pull up and back on the upper handle to raise the handle into the operating position. Make certain the lower handle is seated securely into the handle mounting brackets. Tighten the hand knobs on each side of the handle (carriage bolts must be seated properly into the handle). See Figure 2. Rope Guide Figure 4 7 Wing Nut Assembling Grass Catcher IMPORTANT: Make sure cables are routed to the outside of the handle so they are not in the way when attaching the grass catcher. NOTE: Make certain bag is turned right side out before assembling (warning label will be on the outside). • • Parts for Soft Grass Bag: 1. Front Frame & Rear Frame 2. Grass Bag Assemble grass bag as follows: • • • • Join the rear frame and front frame assembly as shown in Figure 5A. Place bag over frame (black plastic side is the bottom of bag). Slip the openings in the side of the plastic channel on bag over the hooks on the grass catcher frame. Secure bag to frame by working the plastic channels on bag over frame as shown in Figure 5B. All of the plastic channels except center top of bag attach from the outside of bag. Center top of bag attaches from the inside of bag. A Lift the rear discharge door on the mower. Place the hooks on the grass catcher into the slots in the handle bracket assemblies. See Figure 7. Release the rear discharge door. To remove the grass catcher, lift the rear discharge door on the mower. Lift the grass catcher up, out of the slots in the handle bracket assemblies. Release the rear discharge door. WARNING: Never operate the mower unless the hooks on the grass catcher are firmly seated in the slots on the handle bracket assemblies, and the rear discharge door rests firmly against the top of the grass catcher. Rear Discharge Door B Front Frame Assembly Rear Frame Hook Slot in Handle Bracket Assembly Grass Bag Plastic Channels Figure 7 Converting To Side Discharge Figure 5 Attaching Grass Catcher To Mower If your unit is equipped with a side discharge chute, you can convert to a side discharge mower as follows: NOTE: The mulching baffle is already in place on the mower for shipping purposes. Your lawn mower is equipped with both a mulching baffle and a mulching plug. While the mulching baffle is located at the rear of the mower, the mulching plug is located on the right side of the cutting deck. Do not remove the mulching plug from the mower even when you are not mulching. • • • • • To remove the mulching baffle, lift the rear discharge door on the mower. Remove the mulching baffle. See Figure 7. Mulching Plug Hinge Pin Deck Mulching Baffle Lift the rear discharge door and install the mulching baffle. See Figure 7. On the right side of the mower, lift the mulching plug. See Figure 8. Slide the two hooks of the side discharge chute under the hinge pin on the mulching plug assembly as shown below. Lower the side mulching plug. Do not remove the side mulching plug at any time, even when you are not mulching. Deflector Hook Figure 8 Figure 6 8 SECTION 4: KNOW YOUR LAWN MOWER Compare the illustration in Figure 9 with your lawn mower to familiarize yourself with the location of various controls and adjustments. WARNING: The operation of any lawn mower can result in foreign objects being thrown into the eyes, which can result in severe eye damage. Always wear safety glasses or eye shields. We recommend wide vision safety mask for over spectacles or standard safety glasses. Mulching Plug Both the mulching baffle and the mulching plug are used only for mulching purposes. Instead of collecting the grass clippings in a grass catcher, some mower models have the option of recirculating the clippings back to the lawn. This is called mulching. Blade Control Handle Recoil Starter Handle Blade Control Handle The blade control handle is located on the upper handle of the mower.The blade control handle must be depressed in order to operate the unit. Release the blade control handle to stop the engine and the blade. Grass Catcher Bag Spark Plug WARNING: This control mechanism is a safety device. Never attempt to bypass its operations. Height Adjustment Lever Throttle Control The throttle control is located on the engine. It is used to regulate the engine speed. Side Discharge Chute Mulch Plug WARNING: The throttle control cannot be used to stop the engine. If the throttle control is located on the engine, do not adjust it with the engine running. Height Adjustment Lever Figure 9 Recoil Starter Cutting Height Adjustment Lever The recoil starter handle is attached to the handle and is used to start the engine. This lever, located at each wheel, lets you adjust cutting height of the grass. Remember to put all four levers at the same height to avoid uneven cut. Grass Catcher The grass catcher, located at the rear of the mower, is used to bag grass clippings for disposal at another site. SECTION 5: OPERATING YOUR LAWN MOWER Before Starting NOTE: For shipping purposes, your mower wheels are set in low cutting height position. Refer to instructions for cutting height adjustment on page 10. • Gas and Oil Fill-Up • Service engine with gasoline and oil as instructed in the engine manual. Follow instructions carefully. Attach spark plug wire to spark plug. Ensure that the metal cap on the end of the spark plug wire (inside the rubber boot) is fastened securely over the metal tip on the spark plug. WARNING: Be sure no one other than the operator is standing near the lawn mower while starting engine or operating mower. WARNING: Never fill fuel tank indoors, with engine running or until the engine has been allowed to cool for at least two minutes after running. 9 To Start Engine and Engage Blade • WARNING: Never run engine indoors or in enclosed, poorly ventilated areas. Engine exhaust contains carbon monoxide, an odorless and deadly gas. Keep hands, feet, hair and loose clothing away from any moving parts on engine and lawn mower. • • • • • • Move throttle control lever to the fast (rabbit) position. Prime engine as instructed in the separate engine manual packed with your unit. Standing behind the unit, depress the blade control handle and hold it against the upper handle. Grasp starter handle and pull rope out slowly until engine reaches start of compression cycle (rope will pull slightly harder at this point). Let the rope rewind slowly. Pull rope with a rapid, continuous, full arm stroke. Keep a firm grip on starter handle. Return it slowly to the rope guide. • • • WARNING: Extensive vibration of the mower during operation is an indication of damage. If you strike a foreign object, stop the engine. Remove wire from spark plug, thoroughly inspect the mower for any damage, and repair the damage before restarting the mower. To Stop Engine and Blade • Release the blade control handle to stop the engine and blade. Using the Mulcher WARNING: The blade continues to rotate for a few seconds after engine is shut off. • Be sure that lawn is clear of stones, sticks, wire, or other objects which could damage lawn mower or engine. Such objects could be accidentally thrown by the mower in any direction and cause serious personal injury to the operator and others. For best results, do not cut wet grass because it tends to stick to the underside of the mower, and could cause you to slip and fall. New grass, thick grass or wet grass may require a narrower cut. Adjust blade speed according to lawn condition. For a healthy lawn, never cut more than one-third of the total length of the grass at any one cutting. Lawn should be cut in the fall season as long as there is growth. This mower is designed to be operated at full throttle to give you the best cut and do the most effective job of bagging the cut grass. • Disconnect the spark plug wire and ground it against the engine to prevent accidental starting while equipment is unattended. Using Your Rotary Mower WARNING: Never operate your unit without either the rear deflector or entire grass catcher assembly in place. For effective mulching, do not cut wet grass because it tends to stick to the underside of the deck, preventing proper mulching of grass clippings. New or thick grass may require a narrower cut. The ground speed should be adjusted to the condition of the lawn. If mowing has been delayed and the grass has been allowed to grow in excess of 4", mulching is not recommended. Mow using the grass bag (if so equipped) to reduce the grass height to 3-1/4" maximum before mulching. SECTION 6: MAKING ADJUSTMENTS WARNING: Do not at any time make any adjustment to lawn mower without first stopping engine and disconnecting spark plug wire. altitude and load. To adjust carburetor, refer to the engine manual packed with your mower. NOTE: A dirty air cleaner will cause an engine to run rough. Be certain air cleaner is clean and attached to the carburetor before adjusting carburetor. Carburetor Cutting Height WARNING: If any adjustments are made to the engine while the engine is running, keep clear of all moving parts. Be careful of heated surfaces around muffler. An adjusting plate and thumb lever at each wheel position provides cutting height adjustment. Each adjusting plate has nine height positions. • Minor carburetor adjustments may be required to compensate for differences in fuel, temperature, 10 Simply depress the lever towards wheel and move wheel and lever assembly to desired position. All wheels must be placed in the same relative position. See Figure 10. • • Height Adjustment Lever • • Remove the hairpin clips from the weld pins on the handle brackets. Press outward on the legs of the lower handle, and remove it from the mower. Turn the lower handle around so the notches on the bottom of the lower handle are facing forward as shown in Figure 11. Reassemble, placing the bottom holes in the handle over the weld pins in the handle mounting bracket. Reassemble the upper handle. Place the hairpin clips in the inner holes in the weld pins and attach the starter rope as instructed in the assembly instructions on page 7. Figure 10 Handle Height Lower Handle Notch Your mower is shipped with the handle in the higher height position.To lower the handle height for your convenience, proceed as follows. • • Remove the starter rope from the rope guide. Remove the upper handle by removing the hand knobs and carriage bolts. Lay upper handle out of the way, being careful not to kink the cables. Figure 11 SECTION 7: MAINTAINING YOUR LAWN MOWER Replacing Rear Flap • • WARNING: When removing the cutting blade for sharpening or replacement, protect hands by using heavy gloves or a rag to grasp the cutting blade. To remove rear flap, cut off the flat end of the wire rod which secures it to the deck. See Figure 12. Attach the new flap and new rod to deck, bending the ends of the new rod over to secure to deck. • Rear Discharge Door • Handle Bracket d Ro re i W Handle Bracket Remove the bolt and blade support or bell washer which hold the blade and adapter to the engine crankshaft. See Figure 13. Remove the blade and adapter from the crankshaft. When sharpening the blade, follow the original angle of grind as a guide. It is extremely important that each cutting edge receives an equal amount of grinding to prevent an unbalanced blade. Blade Adapter Rear Flap Blade Figure 12 Blade Bell Support Blade Care • Periodically inspect the blade adapter for cracks, especially if you strike a foreign object. Replace when necessary. Hex Bolt Figure 13 11 NOTE: An unbalanced blade will cause excessive vibration when rotating at high speeds and may cause damage to the mower and/or personal injury. Engine • Lubrication • The blade can be tested by balancing it on a round shaft screwdriver. See Figure 14. Remove metal from the heavy side until it balances evenly. It is recommended that the blade always be removed from the adapter for the best test of balance. Refer to the separate engine manual. (Refer to Lubrication Chart in Figure 15.) WARNING: Always stop engine and disconnect spark plug wire before cleaning, lubricating or doing any kind of work on lawn mower. 1. Insert screw driver through hole 2. Blade should be parallel to ground Screw Blade Driver e Lub Ground Lube Figure 14 • • • Lube Before reassembling the blade and the blade adapter to the unit, lubricate the engine crankshaft and the inner surface of the blade adapter with light oil (or engine oil). Also lubricate the bolt holes, bolts and inner surface of the nuts. Install the blade adapter on the crankshaft with the “star” away from the engine. Refer to Figure 13. Place the blade with the side marked bottom (or with part number) facing away from the adapter. Align the blade bell support over the blade with the tabs in the holes of the blade and insert the hex bolt. Tighten the hex bolt to the torque listed in the “Blade Mounting Torque” section below. e Lub Lube Figure 15: Lubrication Chart Blade Mounting Torque Blade Control Center Bolt: 450 in. lbs. min., 600 in. lbs. max. • IMPORTANT:To ensure safe operation, all nuts and bolts must be checked periodically for correct tightness. Rear & Side Discharge Doors Deck Care • NOTE: We do not recommend the use of pressure washers or garden hose to clean your unit.These may cause damage to electric components, spindles, pulleys, bearings or the engine. The use of water will shorten life of the mower and reduce its serviceability. • • Lubricate the pivot points on the blade control handle and the brake cable at least once a season with light oil. The blade control must operate freely in both directions. The torsion springs and pivot points should be lubricated periodically with light oil to prevent any rust or binding. Door must work freely. Wheels • The underside of the mower deck should be cleaned after each use to prevent a buildup of grass clippings, leaves, dirt or other matter. If this debris is allowed to accumulate, it will invite rust and corrosion, and may cause an uneven discharge of grass clippings at the next cutting. The deck may be cleaned by tilting the mower and scraping clean with a suitable tool (make certain the spark plug wire is disconnected). The wheels require no lubrication. However, if the wheels are removed for any reason, lubricate the surface of the axle bolt and the inner surface of the wheel with light oil. Engine oil may also be used. Engine • Follow engine manual for instruction and schedule of lubrication. NOTE: When tipping the unit, empty the fuel tank and keep engine spark plug side up. 12 SECTION 8: OFF-SEASON STORAGE The following steps should be taken to prepare lawn mower for storage. • • NOTE: When storing any type of power equipment in an unventilated or metal storage shed, care should be taken to rust-proof the equipment. Using a light oil or silicone, coat the equipment, especially cables and all moving parts. • • Clean and lubricate mower thoroughly as described in the lubrication instructions. Refer to engine manual for correct engine storage instructions. Coat mower’s cutting blade with chassis grease to prevent rusting. Store mower in a dry, clean area. Do not store next to corrosive materials, such as fertilizer. SECTION 9: TROUBLE SHOOTING GUIDE Trouble Engine fails to start Engine runs erratic Engine overheats Occasional skip (hesitates) at high speed Idles poorly Excessive vibration Mower will not mulch grass Uneven cut Possible Cause(s) 1. Control handle disengaged. 2. Spark plug wire disconnected. 3. Dirty air cleaner. 4. Primer button not depressed. 5. Throttle control lever not in correct starting position . 6. Fuel tank empty or stale fuel. 7. Blocked fuel line . 8. Faulty spark plug. 9. Engine flooded. 1. Unit running in START position. 2. Spark plug wire loose. Corrective Actions 1. Engage blade control handle. 2. Connect wire to spark plug. 3. Refer to the engine manual packed with your unit. 4. Refer to the engine manual. 5. Move throttle lever to FAST or START position. 3. 4. 1. 2. 3. Blocked fuel line or stale fuel. Carburetor out of adjustment. Engine oil level low. Dirty aircleaner. Air flow restricted. 3. 4. 1. 2. 3. 4. 1. 2. Carburetor not adjusted. Spark plug gap too close. Carburetor idle mixture adjustment improperly set. 4. 1. 2. Clean fuel line. Clean, adjust gap or replace. Refer to the engine manual. Wait for a while and crank the engine. Move throttle lever to FAST position. Connect and tighten spark plug wire. Check spark plug for fouling. Clean fuel line; fill tank with clean, fresh gasoline. Refer to the engine manual packed with your unit. Fill crankcase with proper oil. Refer to the engine manual. Stop engine and disconnect spark plug wire. Remove blower housing and clean. Refer to the engine manual. Adjust gap to .030". Refer to the engine manual. 1. Spark plug fouled, faulty or gap too wide. Carburetor not adjusted. Cutting blade loose or unbalanced. Bent cutting blade. Engine speed too low 1. Reset gap to .030" or replace spark plug. 2. 1. Refer to the engine manual. Tighten blade and adapter. Balance blade. Replace blade. Set throttle between 3/4 and full throttle. Wait until later to cut. Mow once at a high cutting height, then mow again at desired height . Place all four wheels in same height position. Sharpen or replace blade. 2. 1. 2. 1. 6. 7. 8. 9. 1. 2. 3. Excessively high grass. 2. 1. 2. 3. 1. 2. Wheels positioned incorrectly. Dull blade. 1. 2. 2. Wet grass. NOTE: For repairs beyond the minor adjustments above, contact your local Cub Cadet dealer or call the Customer Dealer Referral Line at 1(800)-528-1009. 13 SECTION 10: PARTS LIST FOR MODEL PR-521 1 12 68 69 7 82 9 11 16 83 3 2 4 13 19 A 14 6 57 4 15 79 20 50 54 62 65 81 46 A 76 45 67 44 76 53 39 45 52 58 21 72 56 31 77 40 22 18 47 48 79 80 23 30 80 45 29 76 20 71 66 59 63 55 59 43 41 44 42 45 49 39 64 59 51 32 40 36 76 77 46 34 33 14 17 Model PR-521 Ref. No. Part No. Description Ref. No. 1 647-0004 Control Handle Assembly 46 738-0102 Front Axle Bolt 2 710-1205 Rope Guide 47 720-0190 Spring Lever Knob 3 720-0279 Handle Knob 1/4-20 Thd. 48 732-0417A Rear Spring Lever 4 710-1174 Curved Hd. Bolt 5/16-18 x 2" Lg. 49 14578 Height Adj. Assy. Comp. - RH 6 720-0314 Hand Knob N/I 14579 Height Adj. Assy. Comp. - LH 7 710-1270 Oval C-Sunk Mach. Scr. 50 14765 Pivot Bar R.H. 9 712-0324 Hex L-Nut 1/4-20 Thd. N/I 14766 Pivot Bar L.H. 11 749-0705 Upper Handle 51 782-5002 Front Baffle Part No. Description 12 720-0295 Foam Grip 52 710-0654A Hex L-Wash.Scr. 3/8-16 x 1" Lg. 13 749-0928 Lower Handle 53 782-5003 Rear Baffle 14 726-0240 Cable Tie 54 710-1017 Torx Mach AB-Tap Scr. 1/4 x.62" 15 764-0310 Rear Catcher Frame 55 710-0896 HexIndWash. Scr. 1/4-14:.625 16 746-0550 Control Cable - 39” 56 682-0516A Handle Brkt. Ass’y.—RH 17 731-1523 Front Cover: Black 57 682-0515A Handle Brkt. Ass’y.—LH 18 764-0311 Front Catcher Frame 58 782-0047A Cutting Deck 19 764-0635 Grass Bag 59 734-1978 Wheel Black Link 20 714-0104 Int. Cotter Pin 5/16" Dia. 62 736-0270 Bell-Washer 1/4" I.D. 21 732-0678 Door Spring - R.H. 63 682-7000 Hinged Mulching Plug 22 732-0677 Door Spring - L.H. 64 731-1409 Chute Deflector: Side Discharge 23 782-7000 Rear Discharge Door 65 710-0599 Hex Hd Self-Tp Scr. 1/4-20 x .5" L. 29 735-0639 Spark Plug Boot 66 782-5007A Mulching Baffle Plug 30 732-0700 Wire Rod 67 782-5004 Mulching Baffle - R.R. 31 731-1236 Rear Flap 68 751B224437 Muffler Guard 32 753-0588 Blade Adapter (Kit includes 32-34) 69 710-1268 Hex Washer Head Screw 33 710-1044 Hex Bolt 3/8-24 x 1.5" Lg. 71 710-0192 Truss Scr. #10-24 x .38" Lg. 34 736-0524A Blade Bell Support 72 720-0275 Knob 36 742-0741 21" Mulching Blade 76 736-0504 Wave Washer 39 736-0356 Bell-Wash. .39" I.D. x 1.38" 77 731-0982A Hub Cap - Rad. Spoke - Beige 40 712-0798 Hex Nut 3/8-16 Thd. 79 738-0213 Rear Axle Bolt 41 15261A Height Adj. Plate 80 750-0535 Spacer 42 15262B Pivot Bar 81 710-1248 Weld Pin 43 14832 Front Spring Lever Ass’y. w/Knob 82 746-0883 Control Housing w/o Lever 44 738-0507B Shld. Bolt .5" Dia. x .357" 83 751B281451 Engine Shroud 45 736-0105 Bell-Wash. .38" I.D. x .88" O.D. NOTE: For painted parts, please refer to the list of color codes below. Please add the applicable color code, wherever needed, to the part number to order a replacement part. For instance, if a part, numbered 700-xxxx, is painted Cub Yellow, the part number to order would be 700-xxxx-0498. Cub Yellow: 0716 Cub Beige: 0499 Powder Black: 0637 15 MANUFACTURER’S LIMITED WARRANTY FOR: TWO-YEAR RESIDENTIAL ONE-YEAR COMMERCIAL Proper maintenance of your Cub Cadet equipment is the owner’s responsibility. Follow the instructions in your operator’s manual for correct lubricants and maintenance schedule. Your Cub Cadet dealer carries a complete line of quality lubricants and filters for your equipment’s engine, transmission, chassis and attachments. Riding mowers, lawn tractors, garden tractors, Cub Cadet attachments and home maintenance products This limited warranty for residential users, covers any defect in materials or workmanship in your Cub Cadet equipment for two years from the date of purchase for the first user purchaser. We will replace or repair any part or parts without charge through your authorized Cub Cadet dealer. Batteries have a one-year prorated limited warranty with 100% replacement during the first three months. V-belts for either the traction drive or any attachments are covered for one year only. Cub Cadet equipment used commercially is warranted for one year only. (Commercial use is defined as either having hired operators or used for income producing purposes.) Items not covered The warranty does not cover routine maintenance items such as lubricants, filters (oil, fuel, air and hydraulic), cleaning, tune-ups, brake and/or clutch inspection, adjustments made as part of normal maintenance, blade sharpening, set-up, abuse, accidents and normal wear. It does not cover incidental costs such as transporting your equipment to and from the dealer, telephone charges or renting a product temporarily to replace a warranted product. There is no other express warranty. How to obtain service Contact your authorized Cub Cadet servicing dealer who sold you your Cub Cadet equipment. If this dealer is not available, see the Consumer Yellow Pages under “lawn mowers” for the name of a dealer near you. If you need further assistance in finding an authorized Cub Cadet servicing dealer, contact: Cub Cadet Corporation Post Office Box 368023 Cleveland, Ohio 44136 How does state law apply? This limited warranty gives you specific legal rights, and you may also have other rights which vary from state to state.