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Models Inlcuded: SC-011-59 (SC 159) AN-011-71 (AN 171) T h e B e s t W a y T o G o A b o u t Y o u r B u s i n e s s MANUAL MA-159-05...
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Address inquiries to Reference Permissions, Taylor-Dunn Mfg., 2114 W. Ball Road, Anaheim, CA 92804 ® TAYLOR-DUNN SERVICE CENTER For more information about this and other Taylor-Dunn manuals, please write Taylor-Dunn ® ® Taylor-Dunn Mfg.
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B2-10 Ambulance B2-48 With Dump Bed Option B2-48 with Steel Cab, Foldaway 4-Passenger Seat and Stake Sides ET 3000 P2-50 30,000 Pound Tow Tractor ET1-50 Full Size Truck...
Table of Contents Contents Introduction General Maintenance ......1 About this manual ........2 Maintenance Guidelines ......2 Who Should Read This Manual ....2 Troubleshooting Guide ......3 Responsibilities ........2 Lubrication Chart ........4 How To Use This Manual ......3 Front Axle Service ........1 Conventions ............
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Table of Contents Transmission ........1 Special Troubleshooting Guide Adjust the Drive Chain ......2 PMC CONTROL ............ 2 PLUGGING DIODE ..........4 Check the Oil Level ........4 FREEWHEEL DIODE ..........5 Change the Oil .......... 5 ISO ................. 6 Drive Motor ..........
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Table of Contents Illustrated Parts Appendixes Front Axle ........... 2 Appendix A: Special Tools ....... 2 Front Tire ............ 4 Appendix B: Suggested Torque Front Fork ........... 6 Limits for Standard Hardware .... 3 Steering Linkage SC ........8 Hardware Identification ......3 Steering Linkage AN ........
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SC1-00 Stock Chaser B2-48 With Stake Side Dump Bed Option E4-55 Sit Down Tow Tractor C4-25 Sit Down Tow Tractor...
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Table of Contents About this manual ......... 2 Who Should Read This Manual ....2 Responsibilities ..........2 How To Use This Manual ......3 Conventions .............. 3 How to Identify Your Vehicle ......4 Taking Delivery of Your Vehicle ....5 Vehicles shown with optional equipment...
The purchase of this vehicle shows a belief in high Of the Owner... quality products manufactured in the USA. ® ® The owner of this or any Taylor-Dunn vehicle is Taylor-Dunn , a leading manufacturer of electric responsible for the overall maintenance and repairs burden and personnel carriers since 1949, wants to of the vehicle, as well as the training of operators.
INTRODUCTION HOW TO USE THIS MANUAL Conventions This manual is organized into five main sections: Symbols and/or words that are used to define warnings, cautions, instructions, or notes found INTRODUCTION throughout this manual. Refer to the examples below. This section describes how to use this service manual and how to identify your vehicle.
INTRODUCTION HOW TO IDENTIFY YOUR VEHICLE This manual applies to vehicles with the same model and serial numbers listed on the front cover. These vehicles are designed for driving on smooth surfaces in and around facilities such as industrial plants, nurseries, institutions, motels, mobile home parks, and resorts.
The only personnel authorized to repair, modify, or • Check that all wire connections, battery adjust any part of this or any Taylor-Dunn ® vehicle is cables, and other electrical connections are a factory authorized service technician.
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TABLE OF CONTENTS Standard Specifications* ....2 Safety Rules and Guidelines ..... 3 Driver Training Program ....3 Driver Qualifications..........3 2 - Start Switch ............. 4 Vehicle Controls ........ 4 1 - Horn Switch ............. 4 3 - Forward-Off-Reverse Switch ......4 Accessory Switch (Optional) ........
SAFETY RULES AND OPERATING INSTRUCTIONS STANDARD SPECIFICATIONS* ITEM MODEL SPECIFICATION Occupancy Driver only Dimensions SC 159 213L x 78W x 119H Centimeters (84L x 31 x 47H Inches) AN 171 267l x 78W x 126H Centimeters (105L x 31 x 49.5H Inches) Turning Radius SC 159 160 Centimeters (63 Inches)
SAFETY RULES AND OPERATING INSTRUCTIONS SAFETY RULES AND DRIVER TRAINING PROGRAM GUIDELINES According to ANSI B56.8, the owner of this vehicle shall conduct an Operator Training program for all those who It is the responsibility of the owner of this vehicle to assure will be operating this vehicle.
SAFETY RULES AND OPERATING INSTRUCTIONS VEHICLE CONTROLS 1 - Horn Switch Accessory Switch (Optional) The horn switch is located on the right side of the steering Push switch forward to turn on the accessory. Pull the tower. Depress the switch to sound the horn, release it switch back to turn off the accessory.
SAFETY RULES AND OPERATING INSTRUCTIONS 1 - Hour Meter (optional) The hour meter is located to the right of the battery status indicator. It records the number of hours the vehicle has been in operation. 2 - Battery Status Indicator, Analog (optional) The battery status indicator is located to the left of the hour meter.
SAFETY RULES AND OPERATING INSTRUCTIONS Steering, SC 159 The steering wheel and steering system are similar to an automobile. To turn right, turn the steering wheel clockwise. To turn left, turn the steering wheel counter- clockwise. Steering, AN 171 The AN 171 uses a tiller for steering. While sitting: To turn right, move the tiller to the right.
SAFETY RULES AND OPERATING INSTRUCTIONS Foot Interlock Switch, SC 159 (optional) A switch or pedal located under the driver's left foot disables the power to the vehicle when it is released. The switch or pedal must be depressed for the vehicle to operate.
SAFETY RULES AND OPERATING INSTRUCTIONS While driving: VEHICLE OPERATIONAL • Slow down and sound the horn to warn pedestrians GUIDELINES or when approaching a corner or other intersection. • No reckless driving. Safety Guidelines • Do not drive this vehicle on steep inclines or where •...
SAFETY RULES AND OPERATING INSTRUCTIONS Parking Before leaving the vehicle: • Set the forward-off-reverse switch to the ` “OFF” position. • Rotate the start switch to the “OFF” position. In addition: • If parking this vehicle on an incline, turn the wheels to the curb, or block the wheels.
SAFETY RULES AND OPERATING INSTRUCTIONS CHARGING YOUR VEHICLE Explosive mixtures of Hydrogen gas are present within battery cells at all times. Do Battery electrolyte is poisonous and not work with or charge battery in an area dangerous. It contains sulfuric acid. Avoid where open flames (including gas furnace contact with skin eyes or clothing.
SAFETY RULES AND OPERATING INSTRUCTIONS Charging Time STORING AND RETURNING TO Average charging time is 8 to 10-hours. The time required SERVICE to fully charge your batteries will vary depending on: • Both storing your vehicle and returning it to service Capacity of the batteries, higher capacity requires should only be performed by authorized personnel.
SAFETY RULES AND OPERATING INSTRUCTIONS Daily Visual inspection: Tire condition and pressure. External frame damage (body). Operation of all lights and warning alarms and/or horns. Smooth and proper operation of all controls such as but not limited to: • Accelerator pedal, Brake pedal, Steering, Parking brake, etc. •...
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Table of Contents Maintenance Guidelines ....... 2 Troubleshooting Guide ........ 3 Lubrication Chart .......... 4 Model C 4-25 Tow Tractor Illustrations of other popular Taylor-Dunn vehicles Model E 4-55 Tow Tractor...
• Inspect and maintain battery limit switches, protective devices, electrical conductors, and connections in ® conformance with Taylor-Dunn’s recommended procedures. • Keep the vehicle in clean condition to minimize fire hazards and facilitate detection of loose or defective parts.
Maintenance, Service and Repair Troubleshooting Guide Symptom Probable Cause Steering Pulls in One Direction Front End Out of Alignment , Frame or Fork bent Dry Lube Points in Steering Linkage Damaged Fork Bearings Hard Steering Damaged Steering Chains Low Tire Pressure Loose Steering Chains Excessive Steering Play Loose Steering Linkage...
Maintenance, Service and Repair Lubrication Chart Description Locations Lubricant Type Treadle Bushings General Purpose Grease Front Wheel Bearings 1 or 2 High Temperature Wheel Bearing Grease Fork Spindle Bearings General Purpose Grease Steering Shaft General Purpose Grease Steering Shaft Gears General Purpose Grease Steering Chain General Purpose Grease...
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TABLE OF CONTENTS Inspect the Front Wheel Bearings ..2 Adjust Front Wheel Bearings .... 3 Front Axle Removal and Installation .. 4 Removal ..............4 Installation ............4 Replace Front Wheel Bearings ..5...
Maintenance, Service, and Repair INSPECT THE FRONT WHEEL ADJUST FRONT WHEEL BEARINGS BEARINGS 1. Make sure the key-switch is in the “OFF” 1. Make sure the key-switch is in the “OFF” position, then remove the key. position, then remove the key. 2.
Maintenance, Service, and Repair FRONT AXLE REMOVAL AND INSTALLATION Removal Installation 1. Raise the front of the vehicle so that the hole for the axle is the same height as the front wheel hub. 2. Assemble the bearing spacers into the front wheel 1.
Maintenance, Service, and Repair REPLACE FRONT WHEEL BEARINGS 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement.
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TABLE OF CONTENTS Front End Alignment ......2 Center the Steering Wheel ........2 Inspect the Steering Components ..4 Steering Wheel and Bushings ....... 4 Steering Chain ............4 Pillow Blocks ............5 Fork Bearings ........5 Adjust the Steering Shaft ....6 Replace the Steering Wheel ....
Maintenance, Service, and Repair Center 8. Center the steering wheel. Refer to section FRONT END ALIGNMENT the Steering Wheel for information regarding centering the steering wheel. 9. Untie the front fork. 1. Make sure the key-switch is in the “OFF” Adjust 10.
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Maintenance, Service, and Repair 12. Install the chain on the lower sprocket. 13. Tighten the turnbuckles to remove all play from the steering chain. 14. Install new safety wire and tie off as shown in the illustration. 15. Untie the front fork. 16.
Maintenance, Service, and Repair INSPECT THE STEERING COMPONENTS Steering Wheel and Bushings After the steering wheel has been removed, thoroughly clean the steering wheel shaft and bushings. Measure the diameter of the steering shaft. • If the shaft diameter is not between 0.745” and 0.0750”...
Maintenance, Service, and Repair Pillow Blocks FORK BEARINGS 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement.
Maintenance, Service, and Repair ADJUST THE STEERING REPLACE THE STEERING SHAFT WHEEL The steering shaft is adjustable by means of a collar at the rear of the shaft. This adjustment controls the gear lash of the half gears on the shaft and front fork. 1.
Maintenance, Service, and Repair 9. Thoroughly clean all parts and install in reverse REPLACE THE FRONT FORK order. • Tighten the fork spindle nut to remove all play in the fork bearings and then an additional 1/4 turn. 1. Make sure the key-switch is in the “OFF” •...
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TABLE OF CONTENTS Inspect the Service Brake ....2 Adjust the Service Brake ....2 Adjust the Brake Linkages ........3 Replace the Brake Lining ....4 Replace Brake Drum ......6 Replacing the Treadle Linkage ..7...
Maintenance, Service, and Repair Current Taylor-Dunn brakes are asbestos free. However, there is the possibility that the original ® brakes were replaced with aftermarket parts containing asbestos. Since this possibility exists, all brake parts should be handled as if they contain asbestos. Refer to Appendix C for recommended handling precautions.
Maintenance, Service, and Repair Adjust the Brake Linkages Do not use this procedure to adjust the brakes. This procedure should only be performed when replacing any of the mechanical brake linkages or cables or it is found that the cables or linkages have been adjusted incorrectly.
Maintenance, Service, and Repair REPLACE THE BRAKE LINING Current Taylor-Dunn brakes are asbestos free. However, there is ® the possibility that the original brakes were replaced with aftermarket parts containing asbestos. Since this possibility exists, all brake parts should be handled as if they contain asbestos. Refer to appendix C for recommended handling precautions.
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Maintenance, Service, and Repair 10. Remove the brake band bolt (4). 11. Remove the clevis pin (11) from the brake band anchor and remove the brake band (3) from the assembly. 12. Inspect the brake arm pivot bolt for signs of wear.
Maintenance, Service, and Repair REPLACE BRAKE DRUM Current Taylor-Dunn brakes are asbestos free. However, there is the possibility that the original ® brakes were replaced with aftermarket parts containing asbestos. Since this possibility exists, all brake parts should be handled as if they contain asbestos. Refer to appendix C for recommended handling precautions.
Maintenance, Service, and Repair REPLACING THE TREADLE LINKAGE Due to variations in the length of the frame, the treadle linkage must be individually fitted to each vehicle. The hole for the treadle clevis pin is pre-punched. The hole for the bell crank must be match drilled. 6.
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TABLE OF CONTENTS Throttle Linkage Adjustments .... 2...
Maintenance, Service, and Repair THROTTLE LINKAGE ADJUSTMENTS The throttle linkage is coupled with the brake linkage. There are no adjustments that are specific to the throttle linkage. Refer to the Brake Section for linkage adjustments or replacement of the treadle linkage. Accelerator Module Arm Bell Crank Treadle Linkage...
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TABLE OF CONTENTS Inspecting the Motor Brushes .... 2 Motors with internal cooling fans ......2 Enclosed Motors (GE, no cooling fan) ....2 Motor Removal and Installation ..3 Motor Inspection ........ 3 Replacing the Brushes....... 5 Replacing the Bearings ..... 6 Repairing the Commutator ....
Motor Service INSPECTING THE MOTOR BRUSHES Typical brush and brush holder Enclosed Motors (GE, no cooling fan) Typical motor with cooling fan indicated by the arrow Motors with internal cooling fans General Electric Motors NOTE: There are four brushes in the motor. The brushes will not wear at the same rate.
Motor Service Advanced DC Motors Inspection The enclosed Advanced DC motors must be 1. Measure the length of each motor brush. disassembled to inspect the motor brushes. Refer to • If any one brush is less than or equal to the Motor Inspection for information regarding Service...
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Motor Service 5. Inspect the commutator for burn marks. commutator segments and the armature frame. If it is not an open circuit, then the armature is • Burn marks and/or raised commutator segments shorted and the motor must be replaced. 90 or 180 degrees apart is evidence of a shorted armature.
Motor Service Brush Spring Orientation 3. Install the new brushes in reverse order. REPLACING THE BRUSHES 4. Be certain that the brush springs do not rest up NOTE: It is recommended that all four brushes be against the brush wires. Refer to illustrations in replaced as a set.
Motor Service 6. Measure the commutator undercut depth in 5- REPLACING THE BEARINGS places around the commutator. If any one of the measurements is less than the minimum undercut 1. The motor must be removed from the vehicle for Service Limits depth specified in , then the this procedure.
Transmission ADJUST THE DRIVE CHAIN NOTE: A small amount of oil may come out when the drive motor mounting bolts are loosened. 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3.
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Transmission 11. Reconnect the batteries. Rotating parts, keep hands and loose clothing clear of all moving parts. Failure to keep clear of moving parts may result in severe bodily injury and/or property damage. 12. Close all safety interlock switches, turn the key On, place the forward-off-reverse switch in forward and fully depress the accelerator pedal.
Transmission CHECK THE OIL LEVEL NOTE: The oil level in the chain case is maintained by the transmission. Oil is pumped from the 3rd member into the chain case housing. It is not necessary to check the oil level in the chain case. 1.
Transmission CHANGE THE OIL Wear protective gloves when working with petroleum lubricants. Repeated contact with petroleum lubricants can result in skin disorders. 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3.
Transmission DRIVE MOTOR Remove NOTE: In most cases it is not necessary to disassemble the chain case to remove the motor. If you find it necessary to disassemble the chain case, refer to Transmission section for information regarding disassembly of the chain case. 1.
Transmission REAR AXLE Remove and Install 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement. 5.
Transmission REPLACE THE AXLE BEARING NOTE: The axle must be removed from the vehicle to replace the axle bearing. Refer to section Rear Axle: Remove and Install for information regarding removing the axle. NOTE: A 10-ton press is required to replace the axle bearing. NOTE: The axle bearing will be damaged when it is removed.
Transmission TRANSMISSION ASSEMBLY Remove and Install 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement. 5.
Transmission CHAIN CASE NOTE: Some vehicle configurations may require that the transmission be removed to disassemble the chain case. Refer to section Transmission Assembly for information on removing the transmission. Disassemble 1. Make sure the key-switch is in the “OFF” position, then remove the key.
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Transmission 10. Remove the chain case housing bolts, brake assembly, and alignment brackets. 11. Remove the chain case housing from the backing plate. 12. Remove the pinion seal from the chain case housing. 13. Loosen the motor mounting bolts. 14. Loosen the chain adjuster. 15.
Transmission Assemble 1. Thoroughly clean all gasket surfaces. 2. Apply a 1/8” bead of 94-430-03 gasket sealer to the face of the 3rd member. 3. Install the backing plate to the 3rd member. Torque to 30-45 ft-lbs. 4. Install the motor to the backing plate. Do not fully tighten the mounting hardware at this time.
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Transmission 13. Tighten the brake adjusting bolt to 25 ft-lbs. 14. Tighten the brake assembly mounting bolts. Brake Service: 15. Adjust the brake. Refer to section Adjust the Brakes for information regarding adjusting the brakes. Adjust the 16. Adjust the drive chain. Refer to section Drive Chain for information regarding adjusting the drive chain.
Transmission DIFFERENTIAL ASSEMBLY (3 MEMBER) Disassemble NOTE: Bearings and races must be replaced as a set. If any one bearing or race is worn, its mate must also be replaced. It is recommended to replace all bearings and races in the 3rd member as a set. Change the Oil 1.
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Transmission 10. If required, remove the rear tapered bearing from the pinion shaft and discard. NOTE: Do not remove the bearing unless it requires replacement. Removing the rear bearing will damage the bearing. Replacing this bearing will require re-shimming of the pinion shaft. 11.
Transmission Assemble NOTE: Thoroughly clean and inspect all parts before reassembly. Apply a small amount of differential oil to all gears and bearings before reassembly. NOTE: Depending on your vehicle config- uration, the rear pinion pilot bearing is not required and may not be installed. NOTE: If the ring and pinion gear set is to be replaced then the shims for the pinion housing may have to be adjusted.
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Transmission Differential Assembly 9. Reassemble the differential housing in reverse order. 10. Place the ring gear onto the differential housing matching the mark made during disassembly. 11. Install two of the ring gear bolts finger tight to align the gear. 12.
Transmission NOTE: Be sure to continually rotate the ring gear while adjusting the bearings. This makes sure that the bearings and races remain seated correctly. NOTE: One hole on adjusting nut = approximately 0.003" change in backlash. Left and right nuts MUST be turned the same amount AND in the same direction.
Maintenance, Service, and Repair TIRE INFLATION TIRE INSPECTION 6. Check the tire pressure. Refer to Tire Inflation section for information on checking the tire pressure. 1. Make sure the key-switch is in the “OFF” 7. Inspect the tire tread depth. Minimum position, then remove the key.
Maintenance, Service, and Repair REPLACE THE FRONT TIRE/ REPLACE THE TIRE WHEEL (PNEUMATIC) NOTE; To replace the tire, the tire/wheel assembly Front Axle Service Refer to for information on must be removed from the vehicle. Refer to removing the front wheel. Replace the Tire/Wheel section for information on removing the tire/wheel...
Maintenance, Service, and Repair 4-Bolt Pattern 5-Bolt Pattern 8-Bolt Pattern Pattern for tightening the wheel nuts Re-torque all wheel nuts to their final value after 1-week (20-hours) of operation. Failure to re-torque the wheel nuts may result in the wheel coming off of the vehicle causing severe bodily injury and/or property damage.
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TABLE OF CONTENTS Cleaning ..........2 Testing ..........3 Charging ........... 4 Watering ........... 5 Replacing (6-volt batteries only) ..6 Moist Charge Batteries ......... 7 Storage and Returning to Service ..8 Storage ..............8 Returning to Service ..........9...
Maintenance, Service, and Repair CLEANING Explosive mixtures of Hydrogen gas are 1. Make sure the key-switch is in the “OFF” present within battery cells at all times. Do position, then remove the key. not work with or charge battery in an area 2.
Maintenance, Service, and Repair TESTING Explosive mixtures of Hydrogen gas are 1. Make sure the key-switch is in the “OFF” present within battery cells at all times. Do position, then remove the key. not work with or charge battery in an area 2.
Maintenance, Service, and Repair Cleaning the Batteries Clean the batteries. Refer to section for information on cleaning the batteries. Using part number 77-200-00 hydrometer, check and record the specific gravity of each cell in the battery pack. If, after charging, none of the cells exceed a hydrometer reading of 1250 then there may be a fault in the charging system.
Maintenance, Service, and Repair WATERING Explosive mixtures of Hydrogen gas are 1. Make sure the key-switch is in the “OFF” present within battery cells at all times. Do position, then remove the key. not work with or charge battery in an area 2.
Maintenance, Service, and Repair REPLACING (6-VOLT BATTERIES ONLY) NOTE: If the batteries are over one year old, it is recommended to replace them as a set. Explosive mixtures of Hydrogen gas are present within battery cells at all times. Do not work with or charge battery in an area 1.
Maintenance, Service, and Repair 15. Install the batteries in reverse order. Refer to the Illustrated Parts List for battery cable routing. Battery electrolyte is poisonous and 16. It is recommended to replace the battery terminal dangerous. It contains sulfuric acid. Avoid hardware when replacing the batteries.
Maintenance, Service, and Repair STORAGE AND RETURNING TO SERVICE Explosive mixtures of Hydrogen gas are 1. Make sure the key-switch is in the “OFF” present within battery cells at all times. Do position, then remove the key. not work with or charge battery in an area 2.
Maintenance, Service, and Repair Returning to Service 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement.
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Table of Contents Symptoms: ..........2 Main Troubleshooting Sequence ..3 Test Equipment Required: ............ 3 IMPORTANT NOTES and INSTRUCTIONS ....3 Definitions: ................. 4 REV B...
Electrical Troubleshooting Solenoids Circuit Breaker PMC Speed Control Typical Control Panel SYMPTOMS: If your vehicle exhibits any of the following symptoms then skip the main troubleshooting sequence and proceed to Special Troubleshooting in Section 4 at the end of the main troubleshooting sequence.
Failure to do so may result in incorrect test results. • This troubleshooting guide requires the use of a test light rated at the battery voltage of the truck and the Taylor-Dunn Accelerator Module Test Harness. Troubleshooting CANNOT be completed without these tools. Main Sequence Page 3...
Electrical Troubleshooting Definitions: • “MS-1” = The first switch in the accelerator module. • “Battery volts” = The voltage at the batteries at the time the test is completed. • “Pick up” = Energizing a solenoid or contactor. • “F&R” = Forward and Reverse. •...
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Electrical Troubleshooting Power Output Test 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement. The rear drive wheels may rotate during some of the following tests.
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Electrical Troubleshooting Control Wire inputs Test 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement. The rear drive wheels may rotate during some of the following tests.
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Electrical Troubleshooting Control Wire inputs (continued) Connect a voltmeter across the PMC #2 terminal and battery negative. Close all interlock switches, turn the Key Switch The voltage shown is for illustration ON, and place the F&R Switch in Forward. only. The actual voltage may vary. Depress the accelerator pedal to engage MS-1 only.
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Electrical Troubleshooting Power Wire Inputs 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement. The rear drive wheels may rotate during some of the following tests.
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Electrical Troubleshooting Motor 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement. The rear drive wheels may rotate during some of the following tests.
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Electrical Troubleshooting Connect the test light across the motor ‘S1’ and Wiring to motor omitted for clarity. Do not ‘S2’ terminals. disconnect the motor wires for this test. Close all interlock switches, turn the Key Switch ON, and place the F&R Switch in Forward.
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Electrical Troubleshooting Connect the accelerator module test harness to the accelerator module. The voltage shown is for illustration Connect a voltmeter between pin #9 in the test only. The actual voltage may vary. harness and battery positive. • If the voltage is not at battery volts then Main Battery Positive the wiring between pin #9 in the harness and battery negative is open.
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Electrical Troubleshooting Connect a voltmeter between pin #9 (-) and pin #2 (+) in the test harness. Depress the accelerator pedal to engage The voltage shown is for illustration MS-1 only. only. The actual voltage may vary. • If the voltage is between 6.0 and 6.5 volts and the test at the PMC #2 terminal in the Control Wire Input section failed then the wire or interlock switches between...
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NOTE: Due to the many different configurations possible for special order interlocks, they will not be included in this text. Refer to the option ® list for your truck or contact your Taylor-Dunn Representative for more information. If you do not know how to test for continuity, refer test to a qualified technician.
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Electrical Troubleshooting Connect a voltmeter across the COLD terminal View of the terminals of a FLUKE 79 SERIES II MULTIMETER of the key switch and battery negative. typical Key Switch Turn the key switch ON. KEY SWITCH • If the voltage is not at battery volts then "COLD, Violet Wires(s)"...
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Electrical Troubleshooting Connect a voltmeter across one of the COLD terminals of the KSI side of the F&R switch and The COLD terminal is the battery negative. Violet/Black wire on either Close all interlock switches, turn the Key end of the switch Switch ON, and place the F&R Switch in Forward.
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Electrical Troubleshooting Connect a voltmeter across the Solenoid The voltage shown is for illustration Negative Buss Bar and battery positive. only. The actual voltage may vary. FLUKE 79 SERIES II MULTIMETER NOTE: You may skip this test if it was Solenoids are shown for reference only.
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Electrical Troubleshooting Connect a voltmeter across the reverse terminal of the forward and reverse side of the F&R switch The REVERSE terminal is diagonally and battery negative. opposite the reverse side of the rocker on the switch FLUKE 79 SERIES II MULTIMETER Close all interlock switches, turn the Key Switch ON, and place the F&R Switch in F&R switch seen from...
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Electrical Troubleshooting Connect a voltmeter across the ISO solenoid COLD terminal and battery negative. The voltage shown is for illustration only. The actual voltage may vary. Close all interlock switches and turn the FLUKE 79 SERIES II MULTIMETER Key Switch ON. Solenoids are shown for reference only.
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Electrical Troubleshooting Connect a voltmeter across the Reverse Solenoid coil terminals. Refer to your vehicles wiring The voltage shown is for illustration diagram to identify the position of the reverse only. The actual voltage may vary. solenoid. Solenoids are shown for reference only. The type and position of the reverse Close all interlock switches, turn the Key solenoid in your truck may be different...
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Electrical Troubleshooting Reverse (does not run in forward) The voltage shown is for illustration Connect a voltmeter across the PMC KSI only. The actual voltage may vary. terminal and battery negative. Close all interlock switches, turn the Key Switch ON, and place the F&R Switch in forward.
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Electrical Troubleshooting Set the test light voltage to the same voltage as the battery volts. FWD/REV Connect the test light across the Normally Closed contacts of the Reverse solenoid. Refer to your vehicles wiring diagram to identify the position of the Reverse solenoid. Close all interlock switches, turn the Key Switch ON, and place the F&R Switch in Forward.
ELECTRICAL TROUBLESHOOTING Special Troubleshooting Guide This section is specific to the symptoms listed below. Each troubleshooting sequence assumes that all listed symptoms are present. Do not use this section unless the truck has all listed symptoms. SYMPTOMS GO TO Ø Runs slow in both directions plus high armature and field current in both MOTOR directions.
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ELECTRICAL TROUBLESHOOTING 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement. 5.
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ELECTRICAL TROUBLESHOOTING Connect a volt meter across the PMC B+ and PMC M- terminals. Turn the key-switch on, close all interlock The voltage shown is for illustration switches (if equipped), depress the only. The actual voltage may vary. accelerator pedal to engage the first micro switch only (creep speed), then perform the following tests: •...
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ELECTRICAL TROUBLESHOOTING PLUGGING DIODE 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement. 5.
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ELECTRICAL TROUBLESHOOTING FREEWHEEL DIODE 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement. 5.
ELECTRICAL TROUBLESHOOTING 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement. 5.
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ELECTRICAL TROUBLESHOOTING Connect the meter to each end of the resistor that was removed from the ISO solenoid and Reading is plus or minus 10% measure its resistance. ISO solenoid is shown for reference only. The type of solenoid in your truck •...
ELECTRICAL TROUBLESHOOTING SOLENOIDS There is a very slight possibility that a failure in the motor could cause these symptoms. Perform the tests covered in the MOTOR section first. If the motor is OK, continue with the following tests. 1. Make sure the key-switch is in the “OFF” position, then remove the key.
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ELECTRICAL TROUBLESHOOTING Stop trouble shooting here and repair the problem. When the repair is completed, completely retest the vehicle before lowering the drive wheels to the ground, otherwise continue with the next test. • Check continuity from the motor ‘A2’ terminal to the wire that was connected to the motor ‘S2’...
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ELECTRICAL TROUBLESHOOTING With the key-switch on and the F&R switch in reverse, depress the accelerator pedal and perform the following tests: • Check continuity from the wire that was connected to the PMC ‘M-’ terminal to Motor shown for reference only. the wire that was connected to the motor Terminal positions on your motor ‘S1’...
ELECTRICAL TROUBLESHOOTING MOTOR High motor current in both the field and the armature, accompanied with a lack of power, would indicate a shorted armature and\or field. Another symptom that may exist is jumping or stuttering at low speeds and/or the motor will not run unless the armature is manually rotated.
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ELECTRICAL TROUBLESHOOTING Check continuity from ‘S1’ to the frame of the motor. Motor shown for reference only. If you do not know how to test for continuity, Terminal positions on your motor may not be in the same location. refer test to a qualified technician. This should be an open circuit.
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TABLE OF CONTENTS Operating Instructions and Theory of Operation ......2 Testing the Charging Cycle ....3 Test Equipment Required for Troubleshooting ......4 Important Notes and Instructions -------------------- 4 Troubleshooting for Built-in Charger ..5 Troubleshooting for Portable Charger ..8 Testing The Timer Relay ......9 Testing the Interlock Relay .....10 Turn the Key switch OFF BEFORE disconnecting the batteries.
Electrical Troubleshooting OPERATING INSTRUCTIONS AND THEORY OF OPERATION The Lestronic II ® chargers are designed as semiautomatic chargers. The Lestronic II ® charger turns itself on when the “built- in” charger is plugged into the wall outlet, or when the “portable” charger is plugged into the batteries.
Electrical Troubleshooting TESTING THE CHARGING CYCLE In typical installations, the charger will remain on for up to 12 hours depending on the state of charge of the battery when the charge cycle was started. A charger could remain on for longer than 12 hours if: •...
Electrical Troubleshooting TEST EQUIPMENT REQUIRED FOR TROUBLESHOOTING Digital Multi Meter (DMM) with diode and capacitor test function, FLUKE 79 ® model shown at right and in the troubleshooting illustrations. Important Notes and Instructions • This troubleshooting guide assumes a familiarity with the use of a digital multimeter including, voltage tests, continuity tests and diode testing.
Electrical Troubleshooting TROUBLESHOOTING FOR BUILT-IN CHARGER 1. Make sure the key-switch is in the “OFF” position, then remove the key. 2. Place the forward-reverse switch in the center “OFF” position. 3. Set the park brake. 4. Place blocks under the front wheels to prevent vehicle movement. 5.
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Electrical Troubleshooting • Disconnect the charger from the AC source. • Disconnect the batteries. • Disconnect the charger from the vehicle’s harness. • Remove the charger from the vehicle. HIGH VOLTAGE may be stored in the capacitor. Discharge the capacitor before continuing.
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Electrical Troubleshooting • Test the voltage from the fuse assembly (-) to the diode block (+). This voltage should be equal to the battery voltage. If the voltage is less than the battery voltage, then the wires from the harness connectors to the charger are bad.
Electrical Troubleshooting TROUBLESHOOTING FOR PORTABLE CHARGER Disconnect the charger from the AC outlet and the batteries. 1. Test the voltage from the positive terminal on the vehicles DC receptacle to main battery negative. This voltage should be equal to the battery voltage. If the voltage is less than the battery voltage then this wire is broken or has a bad connection.
Electrical Troubleshooting 5. Reconnect the lead to the diode. 6. Connect the charger to the AC source. Insert the DC charger plug into the DC receptacle and perform the following tests: High Voltage inside the charger. Do not touch any internal components while the charger is plugged in.
Electrical Troubleshooting 4. Disconnect the wires from the contact terminals on the timer relay. 5. Reconnect the batteries. 6. Wait 5 seconds, then test the continuity across the timer relay contact terminals. • If this is a closed circuit, then the timer start up circuit is functioning normally. •...
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TABLE OF CONTENTS Operating Instructions and Theory of Operation ........2 HB/PT and GEL Indicator Lamps ...3 Testing the Charging Cycle ....3 Test Equipment Required for Troubleshooting .......4 Important Notes and Instructions Status LED Error Code Table ....5 Troubleshooting ........6 Turn the Key switch OFF BEFORE disconnecting the batteries.
Electrical Troubleshooting OPERATING INSTRUCTIONS AND THEORY OF OPERATION The model HB600W ® and HB1000W ® chargers are designed as semiautomatic chargers. The charger turns itself on when it is plugged into the wall outlet and turns off when the batteries are fully charged.
Electrical Troubleshooting HB/PT AND GEL INDICATOR LAMPS NOTE: Your charger may not be equipped with these lamps. HB/PT Lamp If the HB/PT lamp is “ON”, then the charger has overheated and has entered a proportionally reduced output. The charging cycle will terminate if the temperature continues to rise.
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Electrical Troubleshooting TEST EQUIPMENT REQUIRED FOR TROUBLESHOOTING Digital Multi Meter (DMM), FLUKE 79 ® model shown at right and in the troubleshooting illustrations. Clamp on DC ammeter to measure up to 20-Amps. Important Notes and Instructions • This troubleshooting guide assumes a familiarity with the use of a digital multimeter including, voltage tests, continuity tests and diode testing.
Electrical Troubleshooting STATUS LED ERROR CODE TABLE There are three status lights (LED’s) on the charger name plate. These LED’s normally indicate the current operating state of the charger. If all three LED’s are flashing, it indicate an error has occurred in the charging cycle.
Electrical Troubleshooting TROUBLESHOOTING To test charger operation: Connect a DC volt meter to the main battery positive and negative terminals. Attach a clamp on DC Ammeter to one of the charger DC output wires. Plug the charger into an AC outlet. Wait for charger to start (up to15 seconds), the ammeter should display the DC Amp rating of the charger (plus or minus 10%) indicating that the charger is on (constant current mode).
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TABLE OF CONTENTS Complete Vehicle, Standard Bed ..2 Complete Vehicle, Short Bed or Lift Out Battery Box ....... 3 Complete Vehicle, AN ....... 4...
Wire Diagrams COMPLETE VEHICLE, STANDARD BED White Green Horn Switch Violet/Black Violet/black Green Green Violet/Black Orange/Black Green Black Blue Blue Green Black Black White Wire Diagrams Page 2...
Wire Diagrams COMPLETE VEHICLE, SHORT BED OR LIFT OUT BATTERY BOX Wiring is the same as the standard bed with the exception of: • Harness is wired direct to the solenoids and controller, there is no connector. • Built-In charger is not available. Charger interlock (if equipped) is located in the charging receptacle. Wire Diagrams Page 3...
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Illustrated Parts TABLE OF CONTENTS Front Axle ........... 2 Front Tire ............ 4 Front Fork ........... 6 Steering Linkage SC ........8 Steering Linkage AN ........10 Mechanical Control Linkage ......12 Throttle Linkage .......... 14 Lester Chargers, Page 1 ......16 Lester Chargers, Page 2 ......
Illustrated Parts Signet Charger Typical Charger (8actual appearance varies) NOTE: The harness connectors are not included with the charger. When replacing the charger order 2 each of the following: PART # DESCRIPTION 75-318-20 Butt splice 75-320-51 Knife connector Parts Page 20...
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Illustrated Parts Signet® Charger ITEM # PART # DESCRIPTION 79-303-40 Charger assembly (see note on facing page) 79-575-60 Replacement cover w/AC cord and gasket Note: There are no user serviceable components inside the charger Parts Page 21...
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Illustrated Parts POWER TRACTION DRIVE Item No. Part No. Description 70-049-00 Motor, DC, 4.5/6.0 hp (standard on model SC) 70-054-00 Motor, DC, 6.7/10.0 hp (standard on model AN) 97-100-00 Woodruff Key 88-087-11 Chain Adjusting Screw 88-069-80 Nut, 5/16NC 88-103-09 Motor Mounting Screw 80-703-00 O-Ring 70-454-00...
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Illustrated Parts REAR AXLE up to Serial Number 135706 Item No. Part No. Description 97-236-00 Wheel Lug Nut 96-329-10 Wheel Bolt 41-162-05 Axle, 10-11/16”, Small Bearing, Right 41-163-05 Axle, 13-1/8”, Small Bearing, Left (not shown) 32-514-00 Plate, Axle Retainer 80-505-00 Axle Bearing, Ball Type 32-509-00 Bearing Retainer...
Illustrated Parts Wheels and Tires ITEM # PART # DESCRIPTION Wheels 12-012-00 5 x 8" Tubeless 12-050-00 12-1/8 Diameter Cast Iron Tires 10-075-00 4.80 x 8 LR B Pneumatic 10-076-00 4.80 x 8 LR C Pneumatic 10-081-00 5.70 x 8 LR B Pneumatic 10-082-00 5.70 x 8 Extra Grip 10-083-00...
Illustrated Parts Control Panel (standard) Parts Page 34...
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Illustrated Parts CONTROL PANEL-AN & 48” SC Item No. Part No. Description 72-501-43 Forward or Reverse Solenoid 88-838-06 Sheet Metal Screw, #14 x 1/2” 01-534-80 Panel, Control Mounting 62-204-00 Speed Controller, 275 72-501-42 ISO Solenoid 88-818-06 Sheet Metal Screw, #8 x 1/2” 79-840-00 Circuit Breaker, 10 amp 79-844-00...
Illustrated Parts Decals, SC and AN Item No. Part No. Description 94-384-01 Not a motor vehicle 94-313-20 Safety warning 94-384-14 Leaving vehicle 94-382-00 Treadle 94-313-00 Battery warning 94-319-00 Battery disconnect 91-301-43 Arms and legs 94-333-00 94-373-10 Vehicle data Decals, AN Illustration not available at time of printing Parts Page 43...
Illustrated Parts Miscellaneous Frame and Body, AN Parts Page 46...
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Illustrated Parts MISCELLANEOUS PARTS-Model AN Item No. Part No. Description 90-406-00 Deckboard, 30-3/4” x 53-1/4” 71-599-00 Console Cover 90-160-01 Tractor Seat 90-160-10 Seat Support 98-350-00 Hand Grip 88-838-06 Sheet Metal Screw, #14 x 1/2” Parts Page 47...
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Contents Appendix A: Special Tools ....2 Appendix B: Suggested Torque Limits for Standard Hardware ..3 Hardware Identification ...... 3 Standard Head Markings ........3 Hex Bolts .............. 3 Other Bolts ............3 Hex Nuts ............... 4 Hex Lock Nuts (stover) ........4 Other Nuts .............
Appendixes APPENDIX A: SPECIAL TOOLS DESCRIPTION PURPOSE PART NUMBER Used to install the pinion seal on all chain drive trucks with Pinion Seal Installation Tool the band style brake or the speed sensor on the chain case 43-201-50 cover. Used to center the chain case on the pinion shaft on all chain Chain Case Centering Tool drive trucks with the band style brake or the speed sensor 41-532-50...
Appendixes APPENDIX B: SUGGESTED TORQUE LIMITS FOR STANDARD HARDWARE HARDWARE IDENTIFICATION Standard Head Markings NOTE: Torque value used should be for lowest grade of hardware used. If a grade 2 nut is used on a grade 8 bolt, use grade 2 torque value. NOTE: Toque values specified are for clean dry threads.
NOTE: Nuts with no markings are to be treated as S.A.E. Grade A S.A.E. Grade B S.A.E. Grade C Grade L’9 Other Nuts Other nuts used by Taylor-Dunn should be treated as S.A.E. grade A ® Appendixes Appendix B Page 4...
Appendixes APPENDIX C: BRAKE LINING HANDLING PRECAUTIONS Taylor-Dunn does not currently supply asbestos fiber-brake pads/ shoes with any vehicle. However, there is the possibility that the original brake pads/shoes were replaced with aftermarket pads/shoes containing asbestos. Since this possibility does exist, the brake pads/ shoes should be handled as if they do contain asbestos.
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Taylor-Dunn Mfg. ® 2114 W. Ball Rd. Anaheim, CA 92804 (800)-688-8680 (714) 956-4040 (FAX) (714) 956-0504 Mailing Address: P.O. Box 4240 Anaheim, California 92803 Visit our Website: www.taylor-dunn.com...
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