Form No. 3448-277 Rev B Z Master® 4000 Series Riding Mower With 122cm, 132cm, or 152cm TURBO FORCE® Mower Model No. 74048TE—Serial No. 408906417 and Up Model No. 74053TE—Serial No. 409854706 and Up Model No. 74056TE—Serial No. 409854764 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 ................................... 42 Replacing the Fuel Filter ................................... 42 Servicing the Fuel Tank..................................... 42 Electrical System Maintenance ........................... 43 Electrical System Safety ................................... 43 Servicing the Battery......................................... 43 Servicing the Fuses .......................................... 45 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. Headlights 3. Engine speed—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. A fire or explosion from fuel can burn you and others and can damage property. Note: Determine the left and right sides of the machine from the normal operating position. – To prevent a static charge from igniting the fuel, remove the machine from the truck or trailer and refuel it on the ground, away from all vehicles.
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. • Engage the parking brake, 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. Maintenance Safety • Never tamper with safety devices. Check their • If you leave the key in the switch, someone could • Clean grass and debris from the cutting unit, • • • • Adjust and service it as required. proper operation regularly. 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 Maintenance Procedure • Repack the caster-wheel bearings (more often in dirty or dusty conditions). • Greasing the caster-wheel hubs. Yearly Yearly or before storage • Paint chipped surfaces. • Complete all the procedures in the Storage chapter. Important: Refer to your engine owner's manual for additional maintenance procedures. CAUTION If you leave the key in the switch, someone could accidently start the engine and seriously injure you or other bystanders.
Lubricating the Mower Deck-Lift Pivots Greasing the Caster Pivots Service Interval: Every 400 hours/Yearly (whichever comes first) (more often in dirty or dusty conditions). Service Interval: Every 100 hours Yearly—Repack the caster-wheel bearings (more often in dirty or dusty conditions). Use light oil or spray lubricant to lubricate the deck-lift pivots. g336930 Figure 39 1. Park the machine on a level surface, disengage the blade-control switch, and engage the parking brake. 2.
6. Remove a spacer nut from the axle assembly in the caster wheel. Engine Maintenance Note: Thread-locking compound has been Engine Safety applied to lock the spacer nuts to the axle. 7. Remove the axle (with the other spacer nut still assembled to it) from the wheel assembly. 8. Pry out seals and inspect bearings for wear or damage and replace if necessary. 9. • Keep your hands, feet, face, other body parts, and clothing away from the muffler and other hot surfaces.
4. Clean the inside of the air-cleaner cover with compressed air. 5. Gently slide the primary filter out of the air-cleaner body (Figure 41). Servicing the Engine Oil Service Interval: Before each use or daily—Check the engine-oil level. Every 100 hours—Change the engine oil (more often in dirty or dusty conditions). Note: Avoid knocking the filter into the side of the body. 6. Every 200 hours—Change the engine-oil filter (more often in dirty or dusty conditions).
2. Note: This warms the oil so that it drains better. 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. 3. To keep dirt, grass clippings, etc., out of the engine, clean the area around the oil-fill cap and dipstick before removing it (Figure 43). 2.
6. Slowly pour approximately 80% of the specified oil into the filler tube and slowly add the additional oil to bring it to the Full mark (Figure 45). g008804 g194610 Figure 45 7. Start the engine and drive to a flat area. 8. Check the oil level again. Changing the Engine-Oil Filter 1. Drain the oil from the engine; refer to Changing the Engine Oil (page 39). 2. Change the engine-oil filter (Figure 46).
Servicing the Spark Plug(s) 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. Service Interval: Every 100 hours Set the gap to 0.75 mm (0.03 inch). 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.
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 Electrical System Safety • Disconnect the cable from the negative terminal of g036853 the battery before repairing the machine. Charge the battery in an open, well-ventilated area, away from sparks and flames. Unplug the charger before connecting or disconnecting the battery. Wear protective clothing and use insulated tools.
Installing the Battery 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. Install the negative (black) battery cable and ground wire to the negative (-) battery terminal. Note: For MyRide machines, ensure that the ground cable does not rub against the trailing arm or lower shock mount (Figure 54). g000960 Figure 52 1. Positive (+) battery post 3.
4. Secure the cables with 2 bolts, 2 washers, and 2 locknuts (Figure 51). Servicing the Fuses 5. Slide the red terminal boot onto the positive (+) battery terminal. 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. 6. Secure the battery with the rubber strap (Figure 51). The fuses are located on the right console next to the seat (Figure 54). 1.
Drive System Maintenance Checking the Seat Belt Service Interval: Before each use or daily Inspect the seat belt for wear, cuts, and proper operation of the retractor and buckle. Replace the seat belt if it is damaged. Adjusting the Tracking 1. Disengage the blade-control switch (PTO). 2. Drive to an open, flat area and move the motion-control levers to the NEUTRAL-LOCK position. 3. Move the throttle midway between the FAST and SLOW positions. 4.
Brake Maintenance Checking the Tire Pressure For Machines with Pneumatic Tires Only Adjusting the Parking Brake Service Interval: Every 50 hours/Monthly (whichever comes first) For machines with pneumatic tires only. If you need to adjust the parking brake, contact an Authorized Service Dealer. Maintain the air pressure in the caster tires and 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.
Belt Maintenance Inspecting the Belts Service Interval: Every 50 hours 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. Replacing the Mower Belt 1. Park the machine on a level surface, disengage the blade-control switch (PTO), and engage the parking brake. 2.
Replacing the Hydraulic Pump-Drive Belt g027730 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.
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 51). Adjusting the Height You can adjust the motion control levers higher or lower for maximum comfort. g334847 1. Park the machine on a level surface, disengage the blade-control switch (PTO), and engage the parking brake. 2.
Adjusting the Motion-Control Linkage Adjusting the Tilt 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. Loosen the lower bolt just enough to pivot the control lever fore or aft. Tighten both bolts to secure the control in the new position. 5.
11. Note: The wheels should stop turning or slightly creep in reverse. 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). Note: You may need to remove the motion-control cover to gain access. g334848 Figure 63 1. Access hole for 1/2-inch socket g036753 Figure 64 1. Nut 4. Return-to-neutral plate 2. Stationary plate 5. Tabs touching return to neutral plate 3. Control plate 12.
Checking the Hydraulic-Fluid Level Hydraulic System Maintenance Service Interval: Before each use or daily Hydraulic System Safety • Seek immediate medical attention if fluid is injected into skin. Injected fluid must be surgically removed within a few hours by a doctor. • Ensure that all hydraulic-fluid hoses and lines are 1. Allow the hydraulic fluid to cool down. Check the oil level when the fluid is cold. 2.
Important: Failure to properly perform this procedure can result in irreparable damage to the transaxle drive system. Removing Hydraulic Fluid and Filters 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. Allow the engine to cool. 4.
Mower Deck Maintenance 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. Blade Safety • Inspect the blades periodically for wear or damage. • Use care when checking the blades. Wrap the blades or wear gloves, and use caution when servicing the blades. Only replace or sharpen the blades; never straighten or weld them.
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). g006530 Figure 69 1. Cutting edge 3. Wear/slot forming 2. Curved area 4. Crack g014972 Figure 70 1. Deck 2.
g014973 g014973 Figure 71 Figure 73 1. Blade (in position for measuring) 1. Opposite blade edge (in position for measuring) 2. Level surface 3. Measured distance between blade and the surface (A) 2. Level surface 3. Second measured distance between blade and surface (B) 4. Rotate the same blade 180 degrees so that the opposing cutting edge is now in the same position (Figure 72). A.
g000553 Figure 76 1. Blade 3. 2. Balancer Repeat this procedure until the blade is balanced. Installing the Blades 1. Install the bushing through the blade with the bushing flange on the bottom (grass) side of the blade (Figure 77). g295816 Figure 74 1. Sail area of the blade 4. Bushing 2. Blade 3. Flat of the spindle shaft 5. Blade bolt g255205 Figure 77 Sharpening the Blades 1. 1. Bushing Use a file to sharpen the cutting edge at both ends of the blade (Figure 75). 2.
3. Apply copper-based lubricant or grease to the threads of the blade bolt as needed to prevent seizing. Install the blade bolt finger-tight. 4. Place a wrench on the flat of the spindle shaft and torque the blade bolt to 75 to 81 N∙m (55 to 60 ft-lb). Adjusting the Side-to-Side Leveling and the Blade Slope Check to ensure that the mower deck is level any time you install the mower or when you see an uneven cut on your lawn.
7. Check the front-to-rear blade level (Figure 80). Ensure the front blade tip is lower than the rear blade tip as shown in the block height and rake table. If adjustment is needed, continue with this procedure. g037880 Figure 80 1. Blades front to rear 3. Measure from the tip of the blade to the flat surface here. g334850 Figure 81 2. Blade tip 8. Set the anti-scalp rollers to top holes or remove them completely for this adjustment. 9.
Removing the Mower Deck 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) Before servicing or removing the mower deck, lock out the spring-loaded deck arms. 14. Carefully rotate the blades side to side (Figure 79). 15. Lower the mower deck to the 76 mm (3 inches) position; refer to Adjusting the Height of Cut (page 27). 16.
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 55). 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.