Form No. 3441-675 Rev B Z Master® 4000 Series Riding Mower with 122cm, 132cm, or 152cm TURBO FORCE® Mower Model No. 74048TE—Serial No. 400000000 and Up Model No. 74053TE—Serial No. 400000000 and Up Model No. 74056TE—Serial No. 400000000 and Up Register at www.Toro.com.
This product complies with all relevant European directives; for details, please see the separate product specific Declaration of Conformity (DOC) sheet. Please refer to the engine manufacturer’s information included with the machine. Gross or Net Torque: The gross or net torque of this engine was laboratory rated by the engine manufacturer in accordance with the Society of Automotive Engineers (SAE) J1940 or J2723.
Contents Fuel System Maintenance ................................... 43 Replacing the Fuel Filter ................................... 43 Servicing the Fuel Tank..................................... 43 Electrical System Maintenance ........................... 44 Electrical System Safety ................................... 44 Servicing the Battery......................................... 44 Servicing the Fuses .......................................... 46 Drive System Maintenance ............................
Safety This machine has been designed in accordance with EN ISO 5395. General Safety This product is capable of amputating hands and feet and of throwing objects. Always follow all safety instructions to avoid serious personal injury or death. • Read and understand the contents of this Operator’s Manual before starting the engine. • Keep bystanders and children away. • Do not allow children or untrained people to operate or service the machine.
Slope Indicator g011841 Figure 3 You may copy this page for personal use. 1. The maximum slope you can operate the machine on is 15 degrees. Use the slope chart to determine the degree of slope of hills before operating. Do not operate this machine on a slope greater than 15 degrees. Fold along the appropriate line to match the recommended slope. 2. Align this edge with a vertical surface, a tree, building, fence pole, etc. 3.
Safety and Instructional Decals Safety decals and instructions are easily visible to the operator and are located near any area of potential danger. Replace any decal that is damaged or missing. decaloemmarkt Manufacturer's Mark 1. This mark indicates that the blade is identified as a part from the original machine manufacturer. decal99-8936 99-8936 decalbatterysymbols Battery Symbols Some or all of these symbols are on your battery. 1. Explosion hazard 6. Keep bystanders away from the battery. 2.
decal109-6035 109-6035 decal107-3069 107-3069 1. Warning–there is no rollover protection when the roll bar is down. 2. To avoid injury or death from a rollover accident, keep the roll bar in the raised and locked position and wear the seat belt. Lower the roll bar only when absolutely necessary; do not wear the seat belt when the roll bar is down. 3. Read the Operator's Manual; drive slowly and carefully. decal127-0326 127-0326 1. Read the Operator's Manual. 3.
decal117-3848 117-3848 decal116-5610 1. Thrown object hazard—keep bystanders away. 116–5610 1. Hour meter 2. Power take-off (PTO) 4. Neutral 5. Operator presence switch 3. Parking brake 6. Battery 2. Thrown object hazard, raised deflector—do not operate without the deflector, discharge cover, or grass collection system in place. 3. Cutting/dismemberment hazard of hand or foot, mower blade—stay away from moving parts; keep all guards and shields in place.
decal140-4927 140-4927 1. Height of cut (inches/millimeters) decal132-5067 132-5067 decal144-6569 144-6569 1. Work light 3. Slow 2.
decal144-2669 144-2669 1. Check the engine-oil level. 4. Grease the caster wheel. 2. Check the hydraulic-fluid level. 5. Read the Operator’s Manual before performing maintenance. 3. Check the tire pressure. decal132-0871 132-0871 Note: This machine complies with the industry standard stability test in the static lateral and longitudinal tests with the maximum recommended slope indicated on the decal.
Controls Product Overview Become familiar with all the controls before you start the engine and operate the machine. Control Panel g332505 Figure 4 1. Height-of-cut positions 2. Controls 7. Fuel cap 8. Parking-brake lever 3. Motion-control levers 4. Electric deck lift (certain models only) 9. Mower deck 10. Caster wheel 5. Roll bar 11. Anti-scalp roller g332503 Figure 5 1. Key switch 6. Shock assembly 2. Blade-control switch (power takeoff) 3. Throttle control 4.
Throttle Control Neutral-Lock Position The throttle controls the engine speed, and it has a continuous-variable setting from the SLOW to FAST position (Figure 5). Move the motion-control levers outward from the center to the NEUTRAL-LOCK position when exiting the machine (Figure 25). Always position the motion-control levers into the NEUTRAL-LOCK position when you stop the machine or leave it unattended.
Specifications Note: Specifications and design are subject to change without notice.
Fuel Safety Operation • Fuel is extremely flammable and highly explosive. Note: Determine the left and right sides of the machine from the normal operating position. Before Operation Before Operation Safety General Safety • Do not allow children or untrained people to operate or service the machine. Local regulations may restrict the age of the operator. The owner is responsible for training all operators and mechanics.
Adding Fuel Note: Do not fill the fuel tank completely full. The empty space in the tank allows the fuel to expand. Recommended Fuel • For best results, use only clean, fresh (less than 30 days old), unleaded gasoline with an octane rating of 87 or higher ((R+M)/2 rating method). • Ethanol: Gasoline with up to 10% ethanol (gasohol) or 15% MTBE (methyl tertiary butyl ether) by volume is acceptable. Ethanol and MTBE are not the same. Gasoline with 15% ethanol (E15) by volume is not approved for use.
Breaking in a New Machine New engines take time to develop full power. Mower decks and drive systems have higher friction when new, placing additional load on the engine. Allow 40 to 50 hours of break-in time for new machines to develop full power and best performance. Using the Rollover-Protection System (ROPS) g004954 Figure 8 WARNING 1. Full-down position To avoid injury or death from rollover, keep the roll bar in the fully raised, locked position and use the seat belt. 2.
Using the Safety-Interlock System Test the safety-interlock system before you use the machine each time. If the safety system does not operate as described below, have an Authorized Service Dealer repair the safety system immediately. WARNING If the safety-interlock switches are disconnected or damaged, the machine could operate unexpectedly, causing personal injury. • Do not tamper with the interlock switches.
Positioning the Seat The seat can move forward and backward. Position the seat where you have the best control of the machine and are most comfortable (Figure 11). g030065 Figure 12 1. Firmest position 3. Detents in the slots 2. Softest position Note: Ensure that the left and right rear-shock assemblies are always adjusted to the same positions. g027632 Figure 11 Adjust the rear-shock assemblies (Figure 13).
During Operation During Operation Safety General Safety • The owner/operator can prevent and is responsible g030024 • • • • • • • • • • g030019 Figure 13 • • 19 for accidents that may cause personal injury or property damage. Use your full attention while operating the machine. Do not engage in any activity that causes distractions; otherwise, injury or property damage may occur. Do not operate the machine while ill, tired, or under the influence of alcohol or drugs.
• Before backing up or turning the machine, look – Shut off the engine and remove the key. down and all around for small children. – Wait for all moving parts to stop. • Do not carry children on the machine, even when • Operate the engine only in well-ventilated areas. the blades are not moving. Children could fall off and be seriously injured or prevent you from safely operating the machine.
– Evaluate the site conditions of the day to determine if the slope is safe for machine operation. Use common sense and good judgment when performing this evaluation. Changes in the terrain, such as moisture, can quickly affect the operation of the machine on a slope. • Identify hazards at the base of the slope. Do not operate the machine near drop-offs, ditches, embankments, water, or other hazards. The machine could suddenly roll over if a wheel goes over the edge or the edge collapses.
Disengaging the Parking Brake Entering the Operator’s Position Use the mower deck as a step to get into the operator’s position (Figure 16). g339561 Figure 18 g029797 Figure 16 1. Step here. Operating the Parking Brake Always engage the parking brake when you stop the machine or leave it unattended. Engaging the Parking Brake Park the machine on a level surface.
Operating the Mower Operating the Throttle Blade-Control Switch (PTO) You can move the throttle control between FAST and SLOW positions (Figure 21). The blade-control switch (PTO) starts and stops the mower blades and any powered attachments. Always use the FAST position when engaging the PTO. Engaging the Blade-Control Switch (PTO) Note: Engaging the blade-control switch (PTO) with the throttle position at half or less causes excessive wear to the drive belts.
Starting the Engine Shutting Off the Engine Note: A warm or hot engine may not require choking. CAUTION Important: Do not engage the starter for more Children or bystanders may be injured if they move or attempt to operate the machine while it is unattended. than 5 seconds at a time. Engaging the starter motor for more than 5 seconds can damage the starter motor. If the engine fails to start, wait 10 seconds before operating the engine starter again.
Driving the Machine Using the Motion-Control Levers The drive wheels turn independently, powered by hydraulic motors on each axle. You can turn 1 side in reverse while you turn the other forward, causing the machine to spin rather than turn. This greatly improves the machine maneuverability but may require some time for you to adapt to how it moves. The throttle control regulates the engine speed as measured in rpm (revolutions per minute).
Using the Side Discharge The mower has a hinged grass deflector that disperses clippings to the side and down toward the turf. DANGER Without a grass deflector, discharge cover, or a complete grass-catcher assembly mounted in place, you and others are exposed to blade contact and thrown debris. Contact with rotating mower blade(s) and thrown debris will cause injury or death. • Never remove the grass deflector from the mower deck because the grass deflector routes material down toward the turf.
Adjusting the Height of Cut Adjusting the Height-of-Cut Pin For Machines with a Deck-Lift Pedal You can adjust the height of cut from 38 to 140 mm (1-1/2 to 5-1/2 inches) in 6 mm (1/4 inch) increments by relocating the clevis pin into different hole locations. 1. Push the deck-lift pedal fully forward to lock the mower deck in the TRANSPORT position (also the 140 mm/5-1/2 inches cutting height position) as shown in Figure 29. 2. To adjust, remove the pin from the height-of-cut bracket (Figure 29). 3.
Adjusting the Height of Cut Adjusting the Anti-Scalp Rollers For Machines with an Electric Deck Lift 1. Whenever you change the height of cut, adjust the height of the anti-scalp rollers. Push up on the deck-lift switch (Figure 30). Note: Adjust the anti-scalp rollers so that the rollers do not touch the ground in normal, flat mowing areas. 1. Park the machine on a level surface, disengage the blade-control switch and engage the parking brake. 2.
Operating Tips drop onto your lawn. To avoid this, move onto a previously cut area with the blades engaged or you can disengage the mower deck while moving forward. Using the Fast Throttle Setting For best mowing and maximum air circulation, operate the engine at the FAST position. Air is required to thoroughly cut grass clippings, so do not set the height-of-cut so low as to totally surround the mower deck in uncut grass.
Using the Fuel-Shutoff Valve After Operation After Operation Safety Close the fuel-shutoff valve for transport, maintenance, and storage (Figure 33). General Safety Ensure that the fuel-shutoff valve is open when starting the engine. • Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operator’s position. Allow the machine to cool before servicing, adjusting, fueling, cleaning, or storing it.
Using the Drive-Weel Release Valves WARNING Hands may become entangled in the rotating drive components below the engine deck, which could result in serious injury. Shut off the engine, remove the key, and allow all moving parts to stop before accessing the drive-wheel release valves. WARNING The engine and hydraulic-drive units can become very hot. Touching a hot engine or hydraulic-drive units can cause severe burns. g332790 Figure 34 1.
Transporting the Machine Use a heavy-duty trailer or truck to transport the machine. Use a full-width ramp. Ensure that the trailer or truck has all the necessary brakes, lighting, and marking as required by law. Please carefully read all the safety instructions. Knowing this information could help you or bystanders avoid injury. Refer to your local ordinances for trailer and tie-down requirements.
1. If using a trailer, connect it to the towing vehicle and connect the safety chains. 2. If applicable, connect the trailer brakes and lights. 3. Lower the ramp, ensuring that the angle between the ramp and the ground does not exceed 15 degrees (Figure 35). 4. Back the machine up the ramp (Figure 36). 2. g028043 Figure 36 1. Back the machine up the ramp. 2. Drive the machine forward down the ramp. 5. Shut off the engine, remove the key, and engage the parking brake. 6.
Maintenance • Check the parking brake operation frequently. Adjust and service it as required. • Never tamper with safety devices. Check their Maintenance Safety proper operation regularly. • Clean grass and debris from the cutting unit, • If you leave the key in the switch, someone could muffler, drives, grass catcher, and engine compartment to prevent fires. accidently start the engine and seriously injure you or other bystanders. Remove the key from the switch before you perform any maintenance.
Maintenance Service Interval Monthly Yearly Yearly or before storage Maintenance Procedure • Check the battery charge. • Repack the caster-wheel bearings (more often in dirty or dusty conditions). • Greasing the caster-wheel hubs. • Paint chipped surfaces. • Complete all the procedures in the Storage chapter. Important: Refer to your engine owner's manual for additional maintenance procedures.
Lubrication Lubricating the Mower Deck-Lift Pivots Greasing the Machine Service Interval: Every 100 hours Grease the machine more often in dirty or dusty conditions. Use light oil or spray lubricant to lubricate the deck-lift pivots. Grease Type: No. 2 lithium or molybdenum grease 1. Park the machine on a level surface, disengage the blade-control switch, and engage the parking brake. 2.
Greasing the Caster Pivots 6. Service Interval: Every 400 hours/Yearly (whichever comes first) (more often in dirty or dusty conditions). Remove a spacer nut from the axle assembly in the caster wheel. Note: Thread-locking compound has been applied to lock the spacer nuts to the axle. Yearly—Repack the caster-wheel bearings (more often in dirty or dusty conditions). 7. Remove the axle (with the other spacer nut still assembled to it) from the wheel assembly. 1.
Engine Maintenance 4. Clean the inside of the air-cleaner cover with compressed air. Engine Safety 5. Gently slide the primary filter out of the air-cleaner body (Figure 41). • Keep your hands, feet, face, clothing, and other Note: Avoid knocking the filter into the side of body parts away from the muffler and other hot surfaces. Allow engine components to cool before performing maintenance. Do not change the engine governor speed or overspeed the engine. • the body. 6. Inspecting the Filters 1.
Servicing the Engine Oil 2. Service Interval: Before each use or daily—Check the engine-oil level. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. Note: Ensure that the engine is cool so that the oil has had time to drain into the sump. Every 100 hours—Change the engine oil (more often in dirty or dusty conditions). 3. Every 200 hours—Change the engine-oil filter (more often in dirty or dusty conditions).
Note: This warms the oil so that it drains better. 2. Park the machine so that the drain side is slightly lower than the opposite side to ensure that the oil drains completely. 3. Disengage the blade-control switch (PTO) and engage the parking brake. 4. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. 5. Drain the oil from the engine (Figure 44). 6.
Servicing the Spark Plug(s) Service Interval: Every 100 hours Ensure that the air gap between the center and side electrodes is correct before installing the spark plug. Use a spark plug wrench for removing and installing the spark plug and a gapping tool or feeler gauge to check and adjust the air gap. Install a new spark plug if necessary. g008804 Type of Spark Plug: Kawasaki FX691 and FX801 engines—NGK® BPR4ES or equivalent Air Gap: 0.75 mm (0.030 inch) Removing the Spark Plug(s) 1.
If you see light brown or gray on the insulator, the engine is operating properly. A black coating on the insulator usually means the air cleaner is dirty. Set the gap to 0.75 mm (0.03 inch).
Fuel System Maintenance DANGER In certain conditions, fuel is extremely flammable and highly explosive. A fire or explosion from fuel can burn you and others and can damage property. Refer to Fuel Safety (page 14) for a complete list of fuel related precautions. Replacing the Fuel Filter Service Interval: Every 500 hours/Yearly (whichever comes first) (more often in dusty, dirty conditions).
Electrical System Maintenance 2. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. 3. Remove the battery as shown in Figure 51. Electrical System Safety • Disconnect the battery before repairing the machine. Disconnect the negative terminal first and the positive last. Connect the positive terminal first and the negative last. • Charge the battery in an open, well-ventilated g036853 area, away from sparks and flames.
4. Installing the Battery Install the battery in the machine and connect the battery cables; refer to Installing the Battery (page 45). Note: Do not run the machine with the battery disconnected; electrical damage may occur. 1. Position the battery in the tray with the terminal posts opposite from the hydraulic tank (Figure 51). 2. Install the positive (red) battery cable to the positive (+) battery terminal. 3.
Servicing the Fuses Drive System Maintenance The electrical system is protected by fuses. It requires no maintenance; however, if a fuse blows check the component and circuit for a malfunction or short. Checking the Seat Belt The fuses are located on the right console next to the seat (Figure 54). 1. To replace the fuses, pull out the fuse to remove it. 2. Install a new fuse (Figure 54).
Checking the Tire Pressure For Machines with Pneumatic Tires Only Service Interval: Every 50 hours/Monthly (whichever comes first) For machines with pneumatic tires only. Maintain the air pressure in the rear tires at 90 kPa (13 psi). Uneven tire pressure can cause uneven cut. Check the tires when they are cold to get the most accurate pressure reading. g334735 Figure 55 Right control lever shown 1. Tracking screw g001055 Figure 56 2.
Brake Maintenance Belt Maintenance Adjusting the Parking Brake Inspecting the Belts If you need to adjust the parking brake, contact an Authorized Service Dealer. Replace the belt if it is worn. The signs of a worn belt include squealing while the belt is rotating; the blades slipping while cutting grass; and frayed edges, burn marks, and cracks on the belt. Service Interval: Every 50 hours Replacing the Mower Belt 1.
g027730 Figure 59 g334846 Figure 58 1. Spring 4. Spring-loaded idler assembly 2. Clutch pulley 5. Ratchet 3. Mower belt 6. Square hole in the idler arm for the ratchet 13. Install the belt guide on the idler arm (Figure 58). 14. Using the 3/8-inch ratchet in the square hole, install the idler spring (Figure 58). Note: Ensure that the spring ends are seated in the anchor grooves. 15. Install the belt covers (Figure 59).
Replacing the Hydraulic Pump-Drive Belt 1. Park the machine on a level surface, disengage the blade-control switch (PTO), and engage the parking brake. 2. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. 3. Remove the mower belt; refer to Replacing the Mower Belt (page 48). 4. Raise the machine and support it with jack stands. 5.
Adjusting the Tilt Controls System Maintenance Adjusting the Control-Handle Position If the ends of the levers hit against each other, refer to Adjusting the Motion-Control Linkage (page 52). 1. Park the machine on a level surface, disengage the blade-control switch (PTO), and engage the parking brake. 2. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. 3. Loosen the upper bolt holding the control lever to the control arm shaft. 4.
Adjusting the Motion-Control Linkage 11. Located on either side of the machine, below the seat, are the pump-control linkages. Rotating the end nut with a 1/2-inch deep socket wrench allows fine tuning adjustments so that the machine does not move in neutral. Any adjustments should be made for neutral positioning only. Adjust the pump-control-rod lengths by rotating the nut in the appropriate direction until the wheels slightly creep in reverse (Figure 63 and Figure 64).
Hydraulic System Maintenance Note: The wheels should stop turning or slightly creep in reverse. Note: You may need to remove the motion-control cover to gain access. 13. Shut off the machine. Hydraulic System Safety 14. Remove the jumper wire from the wire harness and plug the connector into the seat switch. • Seek immediate medical attention if fluid is injected 15. Remove the jack stands. 16. Raise the mower deck and install the height-of-cut pin. 17. into skin.
Checking the Hydraulic-Fluid Level Important: Failure to properly perform this procedure can result in irreparable damage to the transaxle drive system. Service Interval: Before each use or daily 1. Allow the hydraulic fluid to cool down. Check the oil level when the fluid is cold. 2. Check expansion reservoir and if necessary add Toro® HYPR-OIL™ 500 hydraulic fluid to the FULL COLD line (Figure 65). Removing Hydraulic Fluid and Filters 1.
Bleeding the Hydraulic System 1. Raise the rear of machine and support it with jack stands (or equivalent support) just high enough to allow the drive wheels to turn freely. g334915 Figure 67 1. Hydraulic-filter housing 8. 9. 10. 2. Cover Remove the O-ring from the filter cover and discard the O-ring. g017625 Figure 68 After the hydraulic fluid drains from the transaxle, remove the filter from the transaxle housing. 1. Jacking points Repeat this procedure on the other side of the machine. 2.
Mower Deck Maintenance Blade Safety • Inspect the blades periodically for wear or damage. • Use care when checking the blades. Wrap the g006530 blades or wear gloves, and use caution when servicing the blades. Only replace or sharpen the blades; never straighten or weld them. Figure 69 • On multi-bladed machines, take care as rotating one blade can cause other blades to rotate. • Replace worn or damaged blades and bolts in sets to preserve balance.
Checking for Bent Blades Note: The machine must be on a level surface for the following procedure. 1. Raise the mower deck to the highest height-of-cut position. 2. While wearing thickly padded gloves, or other adequate hand protection, slowly rotate the blade into a position that allows you to measure the distance between the cutting edge and the level surface the machine is on (Figure 70). g014974 Figure 72 1. Blade (side previously measured) 2. Measurement (position used previously) 3.
Removing the Blades Note: If the blade stays in a horizontal position, the blade is balanced and can be used. Replace the blades if they hit a solid object, or if the blade is out of balance or bent. 1. Place a wrench on the flat of the spindle shaft or hold the blade end using a rag or thickly padded glove. 2. Remove the blade bolt, bushing, and blade from the spindle shaft (Figure 74). Note: If the blade is not balanced, file some metal off the end of the sail area only (Figure 75).
3. Check the tire pressure in the drive tires; refer to Checking the Tire Pressure (page 47). 4. Position the mower deck in the transport-lock position. 5. Carefully rotate the blades from side to side. 6. Measure between the blade tip and the flat surface (Figure 79). If both measurements are not within 5 mm (3/16 inch), adjust the leveling; continue with this procedure. g298850 Figure 78 1. Top spindle nut 3. Blade bolt 2. Flat of the spindle shaft 3. 4.
9. For 60-inch mower decks only: A. Raise the deck to the transport position (140 mm or 5-1/2 inches). B. Slowly loosen the adjusting screw on the lift-assist spring until you can remove the screw (Figure 81). Note: Save the screw for installation. g038090 Figure 82 Bottom view 1. Block—73 mm (2-7/8 inches) 2. Welds Block Height and Rake Table Deck Size Front Block Height Rake All mower decks 73 mm (2-7/8 inches) 4.8 to 6.4 mm (3/16 to 1/4 inch) 13. 14. g334850 Figure 81 1.
17. Ensure that the blocks fit snugly under the deck skirt and that all attachment bolts are tight 18. Continue leveling the deck by checking the front-to-rear blade slope. 19. Check the blades for levelness and repeat deck leveling procedure if necessary. 20. For 60-inch mower decks only: Removing the Mower Deck Before servicing or removing the mower deck, lock out the spring-loaded deck arms. 1.
Replacing the Grass Deflector WARNING An uncovered discharge opening could allow the machine to throw objects toward you or bystanders, resulting in serious injury. Also, contact with the blade could occur. Never operate the machine unless you install a mulch plate, discharge deflector, or grass collection system. 1. Remove the locknut, bolt, spring, and spacer holding the deflector to the pivot brackets (Figure 85). 2. Remove the damaged or worn grass deflector (Figure 85). g015594 Figure 85 1.
Cleaning Cleaning under the Mower Deck Service Interval: After each use 1. Park the machine on a level surface, disengage the blade-control switch (PTO), and engage the parking brake. 2. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. 3. Raise the mower deck to the TRANSPORT position. Cleaning the Suspension System Use compressed air to clean the suspension system.
Storage 12. Check the condition of the blades; refer to Servicing the Cutting Blades (page 56). Storage Safety 13. Prepare the machine for storage when non-use occurs over 30 days. Prepare the machine for storage as follows: • Shut off the engine, remove the key, and wait for all moving parts to stop before you leave the operator’s position. Allow the machine to cool before adjusting, servicing, cleaning, or storing it. A.
Troubleshooting Problem The engine overheats. Possible Cause 1. The engine load is excessive. 1. Reduce the ground speed. 2. The oil level in the crankcase is low. 3. The cooling fins and air passages under the engine-blower housing are plugged. 4. The air cleaner is dirty. 2. Add oil to the crankcase. 3. Remove the obstruction from the cooling fins and air passages. 5. Dirt, water, or stale fuel is in the fuel system. The starter does not crank.
Problem The machine does not drive. The machine vibrates abnormally. The cutting height is uneven. The blades do not rotate. Possible Cause 1. The bypass valves are not closed tight. 1. Tighten the bypass valves. 2. The pump belt is worn, loose, or broken. 3. The pump belt is off a pulley. 4. The idler spring is broken or missing. 5. The hydraulic fluid level is low or too hot. 2. Change the belt. 3. Change the belt. 4. Replace the spring. 5. Add hydraulic fluid to the reservoirs or let it cool down.
Schematics g338323 Electrical Schematic—Page 1 (Rev.
g338324 Electrical Schematic—Page 2 (Rev.
