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EGO ST1510E Repair Manual Line

Line trimmer
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REPAIR GUIDELINE
Line Trimmer_ST1510E
Issue Date: 2018/04/04

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Summary of Contents for EGO ST1510E

  • Page 1 REPAIR GUIDELINE Line Trimmer_ST1510E Issue Date: 2018/04/04...
  • Page 2 Table of Contents ST1510E Line Trimmer Contents Page Tool list Part 1: How to detect the PCBA and motor 5-14 Part 2: Replace the PCBA 15-47 Part 3: Replace the motor 58-76 Part 4: Replace the connector tube assembly 77-88...
  • Page 3 Troubleshooting ST1510E Line Trimmer Problem Possible Cause Fault Position Test & Solution Take apart the components of the trimmer head to check whether there is any debris The grass is piled up inside the trimmer head. trimmer Head accumulation in the inside. If there is any grass debris, it will be removed and checked.
  • Page 4 Tool List For Repair ST1510E Line Trimmer NO. Tool List SPEC Remark Phillips PH2, PH0 Impact wrench 13mm Torx screwdriver Hex wrench Nipper pliers Electric soldering iron Heat gun Heat shrinkable sleeve Scissors To remove the shrinkable sleeve...
  • Page 5 Part 1: How to detect the PCBA and motor...
  • Page 6 How to detect the PCBA and motor ST1510E Line Trimmer 1. Remove battery from tool. 2. Discharge the capacitor which is connect with PCBA a)Set the multimeter function to “ ” . b)Push the red pen pin to the negative contact, push the black pen pin to the positive contact.
  • Page 7 How to detect the PCBA and motor ST1510E Line Trimmer 3. Remove the label on the housing set to loosen 8 pcs screws, then separate the right housing from the left housing. Screw Label Description Part Number Qty. Housing set...
  • Page 8 How to detect the PCBA and motor ST1510E Line Trimmer 4. Remove the cover. 5. Disconnect connector 1. Cover Connector 1 Description Part Number Qty. Cover 3129172001...
  • Page 9 How to detect the PCBA and motor ST1510E Line Trimmer 6. Test the motor assembly to judge if it is open-circuit. a) Set the multimeter function to “Resistance measuring” . b) Measure the resistance between any of the two terminals.
  • Page 10 How to detect the PCBA and motor ST1510E Line Trimmer 7. Disconnect connector 2 and connector 3. Connector 3 Connector 2...
  • Page 11 How to detect the PCBA and motor ST1510E Line Trimmer 8. Measure the upper MOSTET in the PCBA. (Step 1) a) Set the multimeter function setting at “Diode measuring”. b) Contact the black pin to the metal panel connected with the black cable.
  • Page 12 How to detect the PCBA and motor ST1510E Line Trimmer Figure showing how to measure the upper MOSFET in the PCBA (Step 1) Main switch Red cable...
  • Page 13 How to detect the PCBA and motor ST1510E Line Trimmer 9. Measure the lower MOSTET in the PCBA. (Step 2) a) Keep the multimeter function setting at “Diode measuring”. b) Contact the red pen pin to the metal panel connected with the red cable.
  • Page 14 How to detect the PCBA and motor ST1510E Line Trimmer Figure showing how to measure the lower MOSFET in the PCBA (Step 2) Black pen pin black cable...
  • Page 15 Part 2: Replace the PCBA...
  • Page 16 Replace the PCBA ST1510E Line Trimmer 1. Separate the housing set and disconnect the connectors as is shown in the “How to detect the PCBA and motor” section.
  • Page 17 Replace the PCBA ST1510E Line Trimmer 2. Loosen the screw to remove the fixed ring Fixed ring Plain washer Screw Description Part Number Qty. Fixed Ring 3705178001 Tapping Screw 5610294001 Plain Washer 5650005002...
  • Page 18 Replace the PCBA ST1510E Line Trimmer 3. Loosen 8 pcs screws to remove the right handle set. Screw1 Handle set Screw2 Description Part Number Qty. Screw 1 5610294001 Screw 2 5610305001 Handle set 2825617001...
  • Page 19 Replace the PCBA ST1510E Line Trimmer 4. Loosen the screw to remove the fixed ring. Fixed ring Plain washer Screw Description Part Number Qty. Fixed Ring 3705178001 Tapping Screw 5610294001 Plain Washer 5650005002...
  • Page 20 Replace the PCBA ST1510E Line Trimmer 5. Remove the connecting tube assembly. Connecting tube assembly...
  • Page 21 Replace the PCBA ST1510E Line Trimmer 6. Take the switch assembly out of the groove of the handle set. Switch assembly...
  • Page 22 Replace the PCBA ST1510E Line Trimmer 7. Loosen the screw to remove the mounting plate. Screw Mounting plate Description Part Number Qty. Tapping Screw 5610011006 Mounting plate 3129271001...
  • Page 23 Replace the PCBA ST1510E Line Trimmer 8. Remove the switch trigger and spring from the handle set. If any one is broken, replace it with a new one. Spring Switch trigger Description Part Number Qty. Switch Trigger 3129273001 Compression Spring...
  • Page 24 Replace the PCBA ST1510E Line Trimmer 9. Take switch1 out of the groove of the handle set. Switch1...
  • Page 25 Replace the PCBA ST1510E Line Trimmer 10. Separate switch2 from the switch support. Switch1 Switch2 Switch support Switch2 Description Part Number Qty. Switch support 5610011006...
  • Page 26 Replace the PCBA ST1510E Line Trimmer 11. Take the PCBA out of the housing set and replace it with a new one, if lever or power pack button is broken, replace it with a new one. PCBA Power pack button 2...
  • Page 27 Replace the PCBA ST1510E Line Trimmer 12. Loosen the screws to remove the clamp block, then take the lock-off button and spring out of the handle set. If any one is broken, replace it with a new one. Screw Clamp block...
  • Page 28 Replace the PCBA ST1510E Line Trimmer 13. Assemble the spring with the lock-off button, then align the spring with the groove and align the ribs with the grooves to mount the lock-off button into the handle set and lock it with clamp blocks and screws.
  • Page 29 Replace the PCBA ST1510E Line Trimmer 14. Mount switch1 into the groove. Switch1 Switch1...
  • Page 30 Replace the PCBA ST1510E Line Trimmer 15. Assemble the spring with the switch trigger and mount the trigger onto the rib. 16. Mount the mounting plate into the handle set and lock it with screw. Spring Screw Mounting plate...
  • Page 31 Replace the PCBA ST1510E Line Trimmer 17. Assemble switch2 with switch support.
  • Page 32 Replace the PCBA ST1510E Line Trimmer 18. Mount the switch assembly into the groove of the handle set.
  • Page 33 Replace the PCBA ST1510E Line Trimmer 19. Align the thin cables with the groove.
  • Page 34 Replace the PCBA ST1510E Line Trimmer 20. Align the red cable and yellow cable with the groove in sequence.
  • Page 35 Replace the PCBA ST1510E Line Trimmer 21. Align the holes on the connecting tube with the ribs on the handle set and mount the connecting tube into the handle set with long groove facing inwards. Hole Long groove...
  • Page 36 Replace the PCBA ST1510E Line Trimmer 22. Mount the fixed ring onto the connecting tube assembly and tighten it with screw. Screw Fixed ring...
  • Page 37 Replace the PCBA ST1510E Line Trimmer 23. Close the right handle set with the left handle set and fix them with screws. Screw1 Screw2...
  • Page 38 Replace the PCBA ST1510E Line Trimmer 24. Place the PCBA and capacitor into their position and align their cables into the housing grooves. PCBA Capacitor...
  • Page 39 Replace the PCBA ST1510E Line Trimmer 25. Place the inductance and electric contacts into their position and align the red cable into the groove. Electric contacts Inductance...
  • Page 40 Replace the PCBA ST1510E Line Trimmer 26. Align the thin cables into the groove.
  • Page 41 Replace the PCBA ST1510E Line Trimmer 27. Align the red cable into the groove.
  • Page 42 Replace the PCBA ST1510E Line Trimmer 28. Align the yellow cable into the groove.
  • Page 43 Replace the PCBA ST1510E Line Trimmer 29. Connect connector3 and mount it into the groove. Connector3...
  • Page 44 Replace the PCBA ST1510E Line Trimmer 30. Connect connector2 and mount it into the groove. Connector2...
  • Page 45 Replace the PCBA ST1510E Line Trimmer 31. Connect connector1 and mount it into the groove. Connector1...
  • Page 46 Replace the PCBA ST1510E Line Trimmer 32. Mount the cover on the left housing.
  • Page 47 Replace the PCBA ST1510E Line Trimmer 33. Mount the right housing on the left housing and assemble them with screws.
  • Page 48 Part 3: Replace the motor...
  • Page 49 Replace the motor ST1510E Line Trimmer 1. Disassemble the housing assembly and handle assembly as shown in the “Replace the PCBA” section.
  • Page 50 Replace the motor ST1510E Line Trimmer 2. Press the tabs on each side to remove the lower housing assembly, then remove the cutting line.
  • Page 51 Replace the motor ST1510E Line Trimmer 3. Separate the spring from the lower housing assembly if necessary. 4. Grasp the spool assembly to stabilize it, use impact wrench to loosen nut in a counter-clockwise direction. 5. Remove the washer. Washer...
  • Page 52 Replace the motor ST1510E Line Trimmer 6. Remove the spool assembly. Spool assembly Description Part Number Qty. Spool assembly 2825307002...
  • Page 53 Replace the motor ST1510E Line Trimmer 7. Remove the upper housing. Upper housing Description Part Number Qty. Upper housing 3129007001...
  • Page 54 Replace the motor ST1510E Line Trimmer 8. Remove the circlip with nipper pliers. 9. Remove the support assembly. Circlip Description Part Number Qty. Circlip 5660018001 Support assembly 2825470002 Support assembly...
  • Page 55 Replace the motor ST1510E Line Trimmer 10. Loosen the screws to remove the shield. Washer Screw Description Part Number Qty. Shield 3129171001 Shield Screw 5610059007 Washer 5650497001...
  • Page 56 Replace the motor ST1510E Line Trimmer 11. Take the sleeves out of the shaft. Sleeve Sleeve Description Part Number Qty. Sleeve 3552901001...
  • Page 57 Replace the motor ST1510E Line Trimmer 12. Loosen the screws to remove the top switch box cover. 13. Remove the bottom switch box cover and switch lever. Top switch box cover Screw2 Screw1 Description Part Number Qty. Screw1 5620216003 Bottom switch box cover...
  • Page 58 Replace the motor ST1510E Line Trimmer 14. Separate the line load switch from the line load switch support and remove the switch support from the motor housing. Line load switch Line load switch support Description Part Number Qty. Line load switch...
  • Page 59 Replace the motor ST1510E Line Trimmer 15. Loosen 2 pcs screw2 and remove the washers, then loosen screw1. Screw1 Washer Screw2 Description Part Number Qty. Screw1 5620213003 Screw2 5620216003 Washer 3700731002...
  • Page 60 Replace the motor ST1510E Line Trimmer 16. Remove the heat shrinkable sleeves with scissors and disconnect the line load switch with electric soldering iron. If the switch is broken, replace it with a new one. Line load switch Heat shrinkable...
  • Page 61 Replace the motor ST1510E Line Trimmer 17. Remove the big heat shrinkable sleeve wrapping on the cables. Big heat shrinkable sleeve Big heat shrinkable sleeve...
  • Page 62 Replace the motor ST1510E Line Trimmer 18. Remove 3 heat shrinkable sleeves and disconnect the cables to replace the motor with a new one. Heat shrinkable sleeve Motor Description Part Number Qty. Motor 2730267001...
  • Page 63 Replace the motor ST1510E Line Trimmer 19. Mount 1 big size heat shrinkable sleeve, 3 middle size shrinkable sleeves and 4 small size heat shrinkable sleeves onto the cables. Middle size sleeve Big size sleeve Small size sleeve...
  • Page 64 Replace the motor ST1510E Line Trimmer 20. Assemble the new motor with the motor housing. Motor...
  • Page 65 Replace the motor ST1510E Line Trimmer 21. Connect the cables with motor cables by electric soldering iron and shrink the three middle size sleeves by heat gun. Notice: brown to brown, blue to blue and yellow to yellow. Brown to brown...
  • Page 66 Replace the motor ST1510E Line Trimmer 22. Insert the 4 thin cables through the hole of the motor housing. Thin cables...
  • Page 67 Replace the motor ST1510E Line Trimmer 23. Connect these cables with line load switch by electric soldering iron, cove these soldering points with the 4 small shrinkable sleeves and shrink them by heat gun. Blue cable Black cable Brown cable...
  • Page 68 Replace the motor ST1510E Line Trimmer 24. Finally cover the big heat shrinkable sleeve onto the 3 middle size heated sleeves to completely wrap the cables. Big heat shrinkable sleeve...
  • Page 69 Replace the motor ST1510E Line Trimmer 25. Align the hole on the connecting tube with the hole on the motor housing, then insert the connecting tube assembly into the motor housing.
  • Page 70 Replace the motor ST1510E Line Trimmer 26. Tighten the screw 1 to fasten the motor housing with the connecting tube assembly. 27. Insert the washer into the gap of each side of the motor housing. 28. Tighten the screws 2 to further fasten the motor housing with connecting tube assembly.
  • Page 71 Replace the motor ST1510E Line Trimmer 29. Mount the line load switch support on the motor housing 30. Position the line load switch on the switch support. Switch support Line load switch...
  • Page 72 Replace the motor ST1510E Line Trimmer 31. Assemble the switch lever with the bottom switch box cover and mount the connecting tube onto the bottom switch box cover. 32. Mount the top switch box cover on the bottom switch box cover and fasten the cover assembly with screws.
  • Page 73 Replace the motor ST1510E Line Trimmer 33. Mount 2 pcs sleeves onto the shaft. Sleeve Sleeve...
  • Page 74 Replace the motor ST1510E Line Trimmer 34. Assemble the shield with the motor assembly and fasten them with screws and washers. Washer Description Part Number Qty. Screw Shield 3129171001 Screw 5610059007 Shield Washer 5650497001...
  • Page 75 Replace the motor ST1510E Line Trimmer 35. Reverse the steps of disassembling the trimmer head to assemble the trimmer head.
  • Page 76 Replace the motor ST1510E Line Trimmer 36. Align the cables and assemble the housing set and handle set as are shown in the “Replace the PCBA” section.
  • Page 77 Part 4: Replace the connecting tube assembly...
  • Page 78 Replace the connecting tube assembly ST1510E Line Trimmer 1. Remove the connecting tube assembly from the handle set and housing set as is shown in the “Replace the PCBA” section.
  • Page 79 Replace the connecting tube assembly ST1510E Line Trimmer 2. Remove the top switch box cover, bottom switch box cover, switch lever and switch support as are shown in the “Replace the motor” section.
  • Page 80 Replace the connecting tube assembly ST1510E Line Trimmer 3. Loosen screws and remove the washers as are shown in the “Replace the motor” section.
  • Page 81 Replace the connecting tube assembly ST1510E Line Trimmer 5. Pull the cables out of the connecting tube assembly. If the connecting tube assembly is broken, replace it with a new one. Connecting tube assembly Description Part Number Qty. Connecting tube assembly...
  • Page 82 Replace the connecting tube assembly ST1510E Line Trimmer 6. Loosen the screws to disassemble the connector assembly. If any part is broken, replace it with a new one. Screw2 Screw1 Connector assembly Description Part Number Qty. Screw1 5620334004 Screw2 5620434003...
  • Page 83 Replace the connecting tube assembly ST1510E Line Trimmer 7. Assemble the connector assembly and insert the washer into the hole with round edge facing outside. Notice : there is a hole position hole, please make sure the washer has inset into the hole.
  • Page 84 Replace the connecting tube assembly ST1510E Line Trimmer 8. Fasten the connector assembly with screws. Screw2 Screw1...
  • Page 85 Replace the connecting tube assembly ST1510E Line Trimmer 9. Insert the cables through the connecting tube assembly.
  • Page 86 Replace the connecting tube assembly ST1510E Line Trimmer 10. Assemble the motor housing with connecting tube assembly as is shown in the “Replace the motor” section.
  • Page 87 Replace the connecting tube assembly ST1510E Line Trimmer 11. Assemble the line load switch assembly as is shown in the “Replace the motor” section.
  • Page 88 Replace the connecting tube assembly ST1510E Line Trimmer 12. Align the cables in the housing set and handle set, then assemble the housing set and handle set as are shown in the “Replace the PCBA” section. THE END Upon continuous product improvement, please using the latest SBOM & Parts list to order spare parts if necessary.