Husqvarna 520iHT4 Workshop Manual
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Husqvarna 520iHT4 Workshop Manual

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Workshop manual
520iHT4, 520iHE3*
English
1235 - 001 -
*520iHE3 < 2020030000

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Summary of Contents for Husqvarna 520iHT4

  • Page 1 Workshop manual 520iHT4, 520iHE3* English 1235 - 001 - *520iHE3 < 2020030000...

  • Page 2: Table Of Contents

    Contents 1 Introduction 1.1 Document description..........3 1.2 Target group............3 1.3 Revisions..............3 1.4 Safety..............3 1.5 Servicing tools............3 2 Safety 2.1 Safety definitions............4 2.2 General safety instructions........4 2.3 Symbols on the product......... 4 2.4 Special safety instructions........4 3 Servicing data 3.1 Servicing data ............

  • Page 3: Introduction

    WARNING: All personnel that repair or do servicing on the product must read and understand the safety instructions in this workshop manual. 1.5 Servicing tools The manual gives information about necessary servicing tools. Always use original tools from Husqvarna. 1235 - 001 - Introduction - 3...

  • Page 4: Safety

    2 Safety 2.1 Safety definitions Rated voltage, V Warnings, cautions and notes are used to point out specially important parts of the manual. WARNING: Used if there is a risk of injury or Direct current. death for the operator or bystanders if the instructions in the manual are not obeyed.
  • Page 5 WARNING: Do not put the battery back until the product is assembled. 1. Press in the catches and remove the battery. 1235 - 001 - Safety - 5...

  • Page 6: Servicing Data

    3 Servicing data 3.1 Servicing data 2.5 Nm 4.5 Nm 4.5 Nm 3.0 - 4.0 Nm 3.0 Nm 3.0 - 4.0 Nm 3.0 Nm Assembly torq 5.5 Nm Insp. Torq, min 3 Nm (screw 1,2) 4.5 Nm Insp. Torq, min 4 Nm (screw 3,4) 6 - Servicing data 1235 - 001 -...
  • Page 7 8 mm 8.5 Nm 8 mm 3.7 Nm 8 mm 5 Nm 8.5 Nm 1235 - 001 - Servicing data - 7...
  • Page 8 For model 520iHE3 4-5 Nm 3 - 5 Nm 0.8 - 1.0 Nm 0.5 - 0.7 Nm 8 - Servicing data 1235 - 001 -...
  • Page 9 For model 520iHT4 4-5 Nm 4 - 5 Nm 3 - 5 Nm 0.8 - 1.0 Nm 0.5 - 0.7 Nm 1235 - 001 - Servicing data - 9...
  • Page 10 2.5 - 3.0 Nm 1.8 - 2.2 Nm 1.8 - 2.2 Nm 1.5 - 1.7 Nm 10 - Servicing data 1235 - 001 -...

  • Page 11: Servicing Tools

    4.2.2 To connect the common service tool (CST) CAUTION: If you install firmware to a new spare part, make sure that you know the Husqvarna 1235 - 001 - Servicing tools - 11...
  • Page 12 identification number (HID). The identification number is found on the spare part. 1. Remove the battery from the product. 2. Connect the adapter cable (A) to the battery (B) and to the battery slot connector (C) on the product. 3. Make sure that the product is in operation mode. 4.

  • Page 13: Repair Instructions

    5 Repair instructions 5.1 To clean and examine the product parts 5.2.2 To disassemble and assemble the control handle • Clean and examine all parts fully. You find more To remove and instructions in the chapter for each part if special 1.

  • Page 14: Battery Housing

    3. Remove the power trigger lockout and the power CAUTION: Do not pull the wires. Hold the trigger from the handle. connector when you disconnect the main switch. a) Release the catch (B) with a small screwdriver and pull out the connector (C). 4.

  • Page 15: Electrical System

    5.4 Electrical system 5.4.1 Electrical diagram Trigger Yellow Green Green Black Green Black Black Motor Black 1 2 3 4 5 6 Black 1 2 3 4 5 6 Black Black Black Black Black Cable side Blue Black Gray Black Yellow Green Black...

  • Page 16: Control Cable

    Note: Put the wire above the control unit and in the groove in the control handle. Push in the wires fully. 10. Make a note of the Husqvarna identification number (HID) of the new control unit before you install it.

  • Page 17: Air Conductor

    3. Push up the connectors. 4. Connect the motor cables in the opposite sequence. 5.7 Air conductor 5.7.1 To remove the air conductor To disconnect 1. Remove the motor cables. Refer to and connect the motor cables on page 17 . 2.

  • Page 18: Cutting Unit

    5.7.2 To install the air conductor 1. Put the cables of the microswitch in a curve (A) adjacent to the motor. 5.8 Cutting unit 2. Connect the cables to the terminals (B) of the microswitch. 5.8.1 To remove the gear package 3.
  • Page 19 5. Remove the 5 screws and the gear joint cover. 9. Remove the 2 screws. 10. Remove the cutting unit and the gear package. 6. Remove the shaft from the cutting unit and pull out the cables. 7. Remove the locknuts and the bracket. 5.8.2 To install the gear package 1.
  • Page 20 3. Attach the 2 screws. 6. Attach the bracket. 4. Lubricate the parts shown in the illustration. Use approximately 2.5 g of grease on each part. 7. Put the cables through the gear joint and assemble the gear joint. 5. Lubricate the gearbox cover and attach it with the 6 screws.
  • Page 21 10. Install the lower gear package cover. Make sure that 5.8.3 To disassemble the blades the middle connector on the microswitch is in the To remove the 1. Remove the gear package. Refer to slot in the lower gear package cover. gear package on page 18 .

  • Page 22: Motor

    To remove and install 3. Remove the eccentric element (D), the connecting 4. Remove the motor. Refer to the motor on page 22 . rod assembly (E) and the pins (F) from the gear. 5. Remove the lock washer. 4. Assemble in the opposite sequence. 6.
  • Page 23 8. Disassemble the clamp (A) and the bushing (B). 11. Remove the cables one wire at a time and remove the lower angle joint cover. CAUTION: Do not cause damage to the 12. Remove the locking pin retainer. cables. 9. Remove the top angle joint cover. 13.
  • Page 24 5.10.2 To assemble the cutting unit joint 3. Put the cables through the lower angle joint cover. CAUTION: Replace damaged cables. 1. Put the angle adjustment handle on the shaft. 2. Put the locking pin retainer on the tape on the cables.

  • Page 25: Shaft

    7. Install the bushing (B) and clamp (A). 10. Attach the lock washer and loosen the cables. 8. Install the indexing ring (D), the bushing (C), the clamp (B) and the joint (A). To remove the 11. Install the gear package. Refer to gear package on page 18 .
  • Page 26 9. Remove the cutting unit joint. Refer to the gear package on page 18 . 10. Install in the opposite sequence. 5.11.2 To disassemble the shaft 520iHT4 To remove and install 1. Remove the shaft. Refer to the shaft on page 25 .
  • Page 27 10. Remove the cable from the shaft. 6. Remove the 3 screws on the rear clamp. 5.11.3 To assemble the shaft 520iHT4 1. Push the motor cable through the shaft in the direction of the cutting unit end of the shaft.
  • Page 28 4. Push the inner shaft and the bushings through the 9. Pull the cable lock through the sleeve, turn the cable outer shaft. lock 180° and attach the screw. 10. Install the lower clamp on the outer shaft. 5. Install the front clamp. 11.
  • Page 29 4. Remove the power trigger guard and the harness support hook from the shaft. 5. Remove the cables from the shaft. 6. Assemble in the opposite sequence. 1235 - 001 - Repair instructions - 29...

  • Page 30: Technical Data

    50-60 50-60 Power, W The Husqvarna Handheld Battery products marked with IPX4 fulfils these requirements on product approval lev- Noise emissions in the environment measured as sound power (L ) in conformity with EC directive 2000/14/EC. The difference between guaranteed and measured sound power is that guaranteed sound power also includes dispersion in the measurement result and the variations between different products of the same model refer to Directive 2000/14/EC.
  • Page 31 6.1.3 Approved batteries for the product Battery BLi200 Type Lithium-ion Battery capacity, Ah Nominal voltage, V Weight, kg 1235 - 001 - Technical data - 31...

  • Page 32: Troubleshooting

    7 Troubleshooting 7.1 Troubleshooting of the product Symptom Possible causes Recommended step The product does not start. No LEDs The battery is defective. Push the on/off button to do a check come on when you push the on/off of the battery. A minimum of 1 green button.
  • Page 33 Symptom Possible causes Recommended step The warning symbol on the keypad The power trigger is pushed during Do not push the power trigger when flashes after start. The product then start. you start the product. stops. Water in the main switch signal con- Disassemble and dry the stop signal nector.

  • Page 34: Troubleshooting Of The Battery And Battery Charger

    7.2 Troubleshooting of the battery and battery charger Symptom Possible causes Recommended step No LEDs flash on the battery when Defective battery. Replace the battery. you press the start button. A warning sign shows a constant red Defective battery. Replace the battery. light on the battery when the start but- ton is pressed.

  • Page 35: Troubleshooting Of The Connectors

    Symptom Possible causes Recommended step A green lamp on the charger comes Defective Battery. Put the battery in a charger. If the on for approximately 5-10 seconds same problem occurs, replace the when the battery is attached. After battery. that a red warning sign flashes on the Defective charger.
  • Page 36 7.3.5 Wiring cable Make sure the 26-pin connector is correctly assembled, dry and not damaged. 7.3.6 Transport mode sensor Make sure that the transport mode sensor and cables are assembled correctly and not damaged. 36 - Troubleshooting 1235 - 001 -...
  • Page 37 1235 - 001 - Troubleshooting - 37...
  • Page 38 38 - Troubleshooting 1235 - 001 -...
  • Page 39 1235 - 001 - Troubleshooting - 39...
  • Page 40 1141526-26 2020-02-21...

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520ihe3

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