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EGO LM1900E-SP Repair Manual Line

Blade removal & installation
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REPAIR GUIDELINE
PART 1: BLADE REMOVAL & INSTALLATION-LM1900E-SP Lawn Mower
1

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  • Page 1 REPAIR GUIDELINE PART 1: BLADE REMOVAL & INSTALLATION-LM1900E-SP Lawn Mower...
  • Page 2 Table of Contents LM1900E-SP Lawn Mower Contents Page Blade Removal Blade Installation...
  • Page 3 1. Blade Removal LM1900E-SP Lawn Mower 1. Release switches and remove the battery pack from the mower. 2. Wear protective gloves, turn the mower on its side (Fig. 1). 3. Place a metal rod (e.g., a screwdriver) with a diameter less than 9 mm into the fixing hole to act as a stabilizer and place another metal rod (e.g., a long bit) with a diameter between 5 - 6.35mm...
  • Page 4 1. Blade Removal LM1900E-SP Lawn Mower Use a 14mm wrench to turn the blade bolt counterclockwise to loosen it. Stabilizer Another Stabilizer Loosen...
  • Page 5 1. Blade Removal LM1900E-SP Lawn Mower 5. Remove the bolt, washer and blade. Replace any broken or worn parts. 6. Remove the inner flange and fan from the motor shaft, then replace any broken or worn parts. Description Part Number...
  • Page 6 2. Blade Installation LM1900E-SP Lawn Mower 1. Fix the fan assembly. 2. Mount the fan assembly onto the motor shaft with the fan blade towards the deck. Fan blades towards deck Motor shaft Wrong assembly of the fan...
  • Page 7 2. Blade Installation LM1900E-SP Lawn Mower 3. Mount the blade onto the inner flange with the Flat position raised surface facing outwards (Fig. 1) . 4. Aligning the flat position of the outer flange with the corresponding flat position on the motor shaft, mount the outer flange in place(Fig.
  • Page 8 2. Blade Installation LM1900E-SP Lawn Mower 5. Fix the bolt into the shaft and pre-tighten it in a clockwise direction by hand. Outer flange Bolt Pre-tighten by hand...
  • Page 9 2. Blade Installation LM1900E-SP Lawn Mower 6. Turn the blade by hand to align the holes in the blade with the holes in the inner flange(Fig. 1). 7. Place a metal rod (e.g., a long bit) with a diameter between 5 - 6.35mm into the aligning hole to act as a stabilizer.
  • Page 10 REPAIR GUIDELINE PART 2.1: Parts in Power Unit Replacement_LM1900E-SP Lawn Mower...
  • Page 11 Table of Contents LM1900E-SP Lawn Mower Contents Page Power Unit Removal Motor Assembly Replacement 9-19 PCBA Replacement 20-37 Power Unit Assembly 36-42 Handle Position Switch Replacement 43-44...
  • Page 12 1. Power Unit Removal LM1900E-SP Lawn Mower 1. Before replacing or maintaining parts in power unit or self-propelled unit, fold the handle to the grass bag removal position to remove the service cover from the mower. Service Cover Description Part Number...
  • Page 13 1. Power Unit Removal LM1900E-SP Lawn Mower Service Cover 2. Turn the mower on its side and remove the blade, fan and inner flange from the motor shaft as shown in Part 1. Stabilizer Another Stabilizer Loosen...
  • Page 14 1. Power Unit Removal LM1900E-SP Lawn Mower The following parts can be replaced only when the service cover is removed from the mower. Description Part Number DC Motor 2730253001 Main PCB Assembly 2826492002 Self-propelled PCBA 2830416001 Rear Cover 3129298001 Handle Position Switch Assembly...
  • Page 15 1. Power Unit Removal LM1900E-SP Lawn Mower Loosen the 4 hexagon head bolts with a socket wrench (S=10mm). WARNING: During this process, there is a risk of the power unit dropping. The power unit must be supported. Loosen Description Part Number...
  • Page 16 1. Power Unit Removal LM1900E-SP Lawn Mower Separate the power unit from the mower by disconnecting the wires linking with the handle position switch, self-propelled PCB and main switch. Linked with self-propelled PCB Linked with main switch Linked with handle position switch...
  • Page 17 1. Power Unit Removal LM1900E-SP Lawn Mower Remove the power unit from the mower. Power Unit...
  • Page 18 2. Motor Assembly Replacement LM1900E-SP Lawn Mower Open the battery cover. Then loosen the 4 screws to remove the rear cover(Picture see next slide), disconnecting the wires linking with the light button. Battery cover Description Part Number SPEC Battery Cover Assembly...
  • Page 19 2. Motor Assembly Replacement LM1900E-SP Lawn Mower...
  • Page 20 2. Motor Assembly Replacement LM1900E-SP Lawn Mower Disconnect the black connector. Black connector Test the motor...
  • Page 21 2. Motor Assembly Replacement LM1900E-SP Lawn Mower 3. Test the motor resistance between the three wires by using a multimeter. a) Set the multimeter function to “Resistance measuring” . b) Measure the resistance between any of the two connectors.
  • Page 22 2. Motor Assembly Replacement LM1900E-SP Lawn Mower c) If any of the measurement are infinite, it means the circuit between the two connectors is an open circuit, the motor is damaged. Follow the next procedure to replace a new motor.
  • Page 23 2. Motor Assembly Replacement LM1900E-SP Lawn Mower Remove the battery box from the bottom support along the orange arrow , remove the 2 screws to separate the mounting plate from the bottom support. Battery box 2 screws deep in the mounting plate...
  • Page 24 2. Motor Assembly Replacement LM1900E-SP Lawn Mower Mounting plate Battery box Motor and bottom support...
  • Page 25 2. Motor Assembly Replacement LM1900E-SP Lawn Mower 5. Remove the 3 hex bolts, spring washers and plates with a socket wrench (S=10mm) to separate the motor from bottom support. If the bottom support is damaged, replace the damaged one. DC Motor...
  • Page 26 2. Motor Assembly Replacement LM1900E-SP Lawn Mower To fit a new motor, align the locating notch on the motor with the locating pin on motor base to position the motor into place. (Fig. 1). Turn the motor shaft upside to fix the motor onto the motor base by tightening the 3 hex bolts(Fig.
  • Page 27 2. Motor Assembly Replacement LM1900E-SP Lawn Mower Insert the mounting plate into the bottom support with motor shaft upside and tighten 2 screws deep in the mounting plate. Mounting plate 2 screws deep in the mounting plate Bottom support...
  • Page 28 2. Motor Assembly Replacement LM1900E-SP Lawn Mower Connect the black connectors and insert the battery box into the bottom support . Black connector...
  • Page 29 3. PCBA Replacement LM1900E-SP Lawn Mower 1. Remove the motor as shown in previous steps. 2. Release the two yellow connectors linked to main PCBA and self-propelled PCBA . 3. Remove the 2 screws as shown in the figure below.
  • Page 30 3. PCBA Replacement LM1900E-SP Lawn Mower 4. Measure the fuse with a multimeter. If it is open-circuit, meaning the fuse is broken. Yellow plug Fuse...
  • Page 31 3. PCBA Replacement LM1900E-SP Lawn Mower 5. Remove the fuse set from the groove by disconnecting the yellow plug. If the fuse is broken, replace with a new fuse and a new main PCBA assembly. Fuse PCBA Description Part Number...
  • Page 32 3. PCBA Replacement LM1900E-SP Lawn Mower Following the steps shown, take the key holder apart from the rear cover. Bend the wires as far as possible...
  • Page 33 3. PCBA Replacement LM1900E-SP Lawn Mower 7. Take the PCBAs from the mounting plate. 8. Main PCBA , self-propelled PCBA, LED control PCBA and internal wire are as following pictures show. Self-propelled PCBA Main PCBA LED control PCBA Internal wire...
  • Page 34 3. PCBA Replacement LM1900E-SP Lawn Mower 9. Set the multimeter function to “Diode measuring”. 10. Contact the black pen pin to the positive contact with the yellow connector (connect to the wiring harness) and the red pen pin to the three contacts of the yellow connector (connect to the motor), then exchange the pen pins (the red pen pin should contact to the negative contact).
  • Page 35 3. PCBA Replacement LM1900E-SP Lawn Mower 11. Contact the black pen pin to the positive contact with the yellow connector (connect to the wiring harness) and the red pen pin to the three contacts of the triangle yellow plug (connect to the self- propelled motor), then exchange the pen pins (the red pen pin should contact to the negative contact).
  • Page 36 3. PCBA Replacement LM1900E-SP Lawn Mower 12. Remove the 4 screws to separate the electric contact base from the battery box. Description Part Number SPEC Hexagon Socket Screw 5620157006 M4.2x19...
  • Page 37 3. PCBA Replacement LM1900E-SP Lawn Mower 13. the wiring harness from the button unit. Wiring Harness...
  • Page 38 3. PCBA Replacement LM1900E-SP Lawn Mower 14. Wiring harness and button unit are as following pictures show. Button Unit Wiring Harness Description Part Number Wiring Harness 4860570001 Button Unit 2826617001...
  • Page 39 3. PCBA Replacement LM1900E-SP Lawn Mower 15. Assemble the release button, sliding block and spring onto the electric contact base.
  • Page 40 3. PCBA Replacement LM1900E-SP Lawn Mower 16. Mount the wiring harness onto the electric contact base . NOTICE: Hold the electrical contact base set tightly to stabilize the unit. Front view Rear view...
  • Page 41 3. PCBA Replacement LM1900E-SP Lawn Mower 17. Mount them into the battery box. Fix them by tightening the 4 screws(Fig. 1). 18. Connect the two black plugs with the LED control PCBA as Fig. 2 shows. Yellow wire Yellow wire...
  • Page 42 3. PCBA Replacement LM1900E-SP Lawn Mower 19. Aligning the notch on the main PCB board with the locating pin on the mounting plate, tightening the screws, fix other PCBAs on the mounting plate as the following pictures show. PCBA linked to Main PCBA...
  • Page 43 3. PCBA Replacement LM1900E-SP Lawn Mower 20. Connect the 3 yellow plugs on the wiring harness. Linked to main PCBA Linked to self-propelled PCBA Linked to fuse...
  • Page 44 3. PCBA Replacement LM1900E-SP Lawn Mower 21. Align the wires as the red arrows shown in the following picture.
  • Page 45 3. PCBA Replacement LM1900E-SP Lawn Mower 22. Put the key holder in place. 23. Connect the black connector linked to the rear cover. Black connector...
  • Page 46 3. PCBA Replacement LM1900E-SP Lawn Mower 24. Mount the motor into the battery box as “Motor Assembly Replacement” part show. 25. Insert the battery box into the bottom support along the arrow, mount the reassembled power unit onto the mower.
  • Page 47 4. Power Unit Assembly LM1900E-SP Lawn Mower 1. 3 wires should be exposed, insert the plugs into the corresponding sockets. Linked to main switch Linked to handle position switch Linked to self-propelled PCBA...
  • Page 48 4. Power Unit Assembly LM1900E-SP Lawn Mower 2. Turn the mower on its back. In this way, the power unit can be located stably on the mower without dropping. 3. Tighten the 4 hexagon head bolts with a socket wrench(S=10mm) to fix the power unit.
  • Page 49 4. Power Unit Assembly LM1900E-SP Lawn Mower 4. Align the wires into the grooves.
  • Page 50 4. Power Unit Assembly LM1900E-SP Lawn Mower 5. Close the service cover.
  • Page 51 4. Power Unit Assembly LM1900E-SP Lawn Mower 6. Tighten the screws.
  • Page 52 5. Handle Position Switch Replacement LM1900E-SP Lawn Mower 1. If the handle position switch is broken, during the process of assembling power unit onto the mower, replace it with a new one. 2. Set the multimeter function to “Resistance measuring”.
  • Page 53 5. Handle Position Switch Replacement LM1900E-SP Lawn Mower 3. Replace a new handle position switch, reconnect the switch with wires . 4. Align other wires as the steps in “Power Unit Assembly” shown. This side facing upwards Handle position switch...
  • Page 54 REPAIR GUIDELINE PART 2.2: LED LIGHT ASSEMBLY_LM1900E-SP Lawn Mower...
  • Page 55 Table of Contents LM1900E-SP Lawn Mower Contents Page LED Button Replacement LED Headlights Replacement...
  • Page 56 1. LED Button Replacement LM1900E-SP Lawn Mower The LED button can be replaced following the figures shown below. Remove 2 screws LED button PCBA Release the black connector LED Button Description Part Number SPEC LED button 3322491001 Hexagon Socket Screw 5620157006 M4.2x19...
  • Page 57 2. LED Headlights Replacement LM1900E-SP Lawn Mower 1. Remove the power unit from the mower as “Power unit replacement” part shows. 2. Loosen 4 screws of the battery box (Fig. 1, Fig. 2, Fig. 3). 3. Separate the top cover and battery cover from the battery box. (Fig. 4).
  • Page 58 2. LED Headlights Replacement LM1900E-SP Lawn Mower 4. Release the black connector linked to the LED control PCBA. 5. Remove the LED Electric Assembly from the top cover . Linked to the LED control PCBA LED Electric Assembly Description Part Number...
  • Page 59 2. LED Headlights Replacement LM1900E-SP Lawn Mower 6. If the LED Electric Assembly is damaged, replace with a new one , align the wires as below.
  • Page 60 2. LED Headlights Replacement LM1900E-SP Lawn Mower 7. Assemble the top cover and the battery cover onto the battery box , then tighten the 6 screws to lock the covers. Linked with main PCB...
  • Page 61 2. LED Headlights Replacement LM1900E-SP Lawn Mower 8. Connect the black connector linked to the LED control PCBA, insert the LED control PCBA into the mounting plate, connect the black connector linked to the rear cover. Wire alignments 9. Mount the power unit as shown in “Power unit replacement” part .
  • Page 62 REPAIR GUIDELINE PART 2.3: BATTERY COVER ASSEMBLY_LM1900E-SP Lawn Mower...
  • Page 63 Battery Cover Assembly Replacement LM1900E-SP Lawn Mower The battery cover consists of the transparent guard and the battery cover itself. Description Part Number Battery cover assembly 2826310001 Transparent guard 3129442001 Transparent guard Battery cover...
  • Page 64 Battery Cover Assembly Replacement LM1900E-SP Lawn Mower 1. Remove the transparent guard from the battery cover, replace the transparent guard. E-ring...
  • Page 65 Battery Cover Assembly Replacement LM1900E-SP Lawn Mower 2. Fix the battery cover on the top cover by tightening the 2 screws. THE END...
  • Page 66 REPAIR GUIDELINE PART 3: REAR COVER_LM1900E-SP Lawn Mower...
  • Page 67 Rear Cover Replacement LM1900E-SP Lawn Mower Rear Cover Description Part Number Rear Cover 3129298001...
  • Page 68 Rear Cover Replacement LM1900E-SP Lawn Mower 1. Detach the service cover from the mower by loosening the 8 screws.
  • Page 69 Rear Cover Replacement LM1900E-SP Lawn Mower 2. Loosen the 6 screws to remove the handle assembly from the mower. Description Part Number SPEC Mounting Plate 3706864001 Mounting Plate 3706719001 Screw 5620157006 M4.2x19...
  • Page 70 Rear Cover Replacement LM1900E-SP Lawn Mower 3. Remove the E Ring with a flat head screwdriver(Fig1). 4. Pull out the shaft from right side by hand, take down the rear cover and shaft(Fig2 &3) . E Ring Description Part Number...
  • Page 71 Rear Cover Replacement LM1900E-SP Lawn Mower 5. Remove the spring from the rear cover. Replace with a new rear cover or torsion spring. Description Part Number SPEC Torsion Spring 3660559001...
  • Page 72 Rear Cover Replacement LM1900E-SP Lawn Mower 7. Insert the shorter foot of the torsion spring into the groove of the rear cover. Insert...
  • Page 73 Rear Cover Replacement LM1900E-SP Lawn Mower 8. Position the rear cover and torsion spring assembly in the deck. Insert the half of shaft through the hole on the mower .Then put down the rear cover and insert the foot of the spring in the deck groove.
  • Page 74 Rear Cover Replacement LM1900E-SP Lawn Mower 9. Insert the whole shaft through the hole on the mower and the torsion spring, and push it into position. Push the shaft into position and lock it with E ring. 10. Lift up the rear cover to check if it can rotate around the shaft smoothly. If it works well, mount the handle assembly and the service cover onto the mower.
  • Page 75 REPAIR GUIDELINE PART 4: HANDLE Set & SWITCH BOX COVER _LM1900E-SP Lawn Mower...
  • Page 76 Table of Contents LM1900E-SP Lawn Mower Contents Page Opening the Switch Box Cover The Safety Button Replacement 7-10 The Main Switch Set(Lever/Trigger) Replacement 11-13 The Top & Bottom Switch Box Cover Replacement The Handle Set Replacement 15-16 The Switch electric Assembly Replacement...
  • Page 77 Handle Set & Parts in Switch Box Cover Replacement LM1900E-SP Lawn Mower When opening the switch box covers, the following relevant parts can be replaced: Description Part Number Switch Electric Assembly 2830410001 Control Handle Lever 3650208001 Switch Actuator 3127905001 Button...
  • Page 78 1. Opening the Switch Box Cover LM1900E-SP Lawn Mower 1. With the handle locked in the operating position, remove the 4 bolts. The 4 bolts are separately fixed by one hexagon nut on the reverse. Hexagon Description Part Number SPEC...
  • Page 79 1. Opening the Switch Box Cover LM1900E-SP Lawn Mower 2. Fold the handle to the grass bag removal position(Fig. 1). 3. Remove the 7 tapping screws from the housing(Fig. 2). NOTICE: During this process, keep holding the top switch box cover with one hand to prevent dropping.
  • Page 80 1. Opening the Switch Box Cover LM1900E-SP Lawn Mower 4. Hold the top switch box cover with one hand and remove bottom switch box cover gently with the other hand. Replace any damaged parts accordingly. Switch Electric Assembly Top Switch...
  • Page 81 2. The Safety Button Replacement LM1900E-SP Lawn Mower 1. Remove the spring, screw, plain washer, switch actuator and button. Switch Actuator Screw Washer Spring Button Description Part Number SPEC Description Part Number SPEC Spring 3660011002 Switch Actuator 3127905001 Screw 5620157006 M4.2x19...
  • Page 82 2. The Safety Button Replacement LM1900E-SP Lawn Mower Place the new button into the mounting slot. Align the actuator slot with the buttons highest rib (Fig. 1). Button Higher Rib Actuator Slot Mounting Slot...
  • Page 83 2. The Safety Button Replacement LM1900E-SP Lawn Mower Place the plain washer onto the actuator and tighten it with a screw (Fig. 1). Locate the actuator between the main switch and the housing (Fig. 2) .
  • Page 84 2. The Safety Button Replacement LM1900E-SP Lawn Mower 6. Place the spring onto the actuator and make sure it is securely located(Fig. 1). 7. Close the switch box cover as steps in following “Close the Switch Box Cover” part show.
  • Page 85 3. The Main Switch Set(Lever/Trigger) Replacement LM1900E-SP Lawn Mower 1. Loosen the 2 screws . Remove the clamp, spring and switch lever set. 2. Replace with a new switch lever or trigger if any distortion or malfunction appears. Clamp Control Handle Lever...
  • Page 86 3. The Main Switch Set(Lever/Trigger) Replacement LM1900E-SP Lawn Mower 3. Mount the switch trigger to the switch lever. NOTICE：The flat position on the lever should be fixed as the fig. 3 show. Flat Position Here...
  • Page 87 3. The Main Switch Set(Lever/Trigger) Replacement LM1900E-SP Lawn Mower 4. Put the spring into the hole. Mount the main switch set onto the spring with the hook outside the spring(Fig. 1). 5. Align the clamp slot with the locating rib on the housing(Fig. 2).
  • Page 88 4. To Replace the Top & Bottom Switch Box Cover LM1900E-SP Lawn Mower 1. Remove all the switches as well as their cables from the top switch box cover; 2. Remove the control handle lever from the top switch box cover;...
  • Page 89 5. The Handle set Replacement LM1900E-SP Lawn Mower 1. Detach the 2 connectors linked to the handle set and the switch electric assembly . Linked to the handle set...
  • Page 90 5. The Handle set Replacement LM1900E-SP Lawn Mower 2. Pull the handle set, removing the handle set from the plastic bushings in the aluminum tubes. 3. Replace with a new one if it appears worn or broken. 4. Insert the two sides into the plastic bushings and press them into place.
  • Page 91 6. The Switch Electric Assembly Replacement LM1900E-SP Lawn Mower 1. Detach the 4 connectors as the following pictures show. Linked to the handle set Linked to the internal wire ASSY...
  • Page 92 6. The Switch Electric Assembly LM1900E-SP Lawn Mower 2. If the switch electric assembly is damaged, replace a new one. 3. Set the multimeter function to “Resistance measuring”. 4. Press the handle position switch, contact the black pen pin and red pen pin to the two wires linked the switch.
  • Page 93 6. The Switch Electric Assembly LM1900E-SP Lawn Mower 5. Connect the 4 connectors (Fig. 1&2) and align the bellows into the housing groove with at least four threads located in (Fig. 3) . At least 5 threads of the bellows...
  • Page 94 6. The Switch Electric Assembly 6. Align the wires of the switch electric assembly and place the switch electric assembly into the holder.
  • Page 95 7. Closing the Switch Box Cover LM1900E-SP Lawn Mower 1. Fully extend the side rails to mount the top switch box cover to the handle, making sure the ribs on the handle locate on the ribs on the switch box cover.
  • Page 96 7. Closing the Switch Box Cover LM1900E-SP Lawn Mower 2. Close the switch box set and fix them by tightening the 7 screws on the bottom switch box cover firstly and the 4 bolts on the top switch box cover to lock the cover set, making sure the...
  • Page 97 7. Closing the Switch Box Cover LM1900E-SP Lawn Mower THE END...
  • Page 98 REPAIR GUIDELINE PART 5: BEAM HOUSING_LM1900E-SP Lawn Mower...
  • Page 99 Table of Contents LM1900E-SP Lawn Mower Contents Page Opening the Beam Assembly Closing the Beam Assembly Replacing the Left/Right Inner Tube ASSY/Beam Tube 9-12...
  • Page 100 Beam Assembly Replacement LM1900E-SP Lawn Mower When opening the beam assembly, the following parts can be replaced: Left inner tube ASSY Right inner tube ASSY Beam Assembly Description Part Number Beam Assembly 2826544001...
  • Page 101 1. Opening the Beam Assembly LM1900E-SP Lawn Mower 1. Remove the 13 tapping screws to open the beam assembly. NOTICE: Internal Wire ASSY is located in the right beam assembly. Description Part Number SPEC Hexagon Socket Screw 5620157006 M4.2x19...
  • Page 102 1. Opening the Beam Assembly LM1900E-SP Lawn Mower 2. Remove the beam assembly, rubber block and clamp block. Beam Assembly Micro switch Description Part Number Rubber Block Clamp Block Beam Assembly 2826544001 Rubber Block 3126832001 Clamp Block 3129506001...
  • Page 103 2. Closing the Beam Assembly LM1900E-SP Lawn Mower 1. Align the cable in the bottom housing; press the cable into place. 2. Align the locating hole with the locating pin on bottom housing, position the switch into place. Locating hole...
  • Page 104 2. Closing the Beam Housing LM1900E-SP Lawn Mower 3. Mount the bottom housing onto the side rail . 4. Fully extend the side rail to make sure the dent on the rail appears in the opening of the outer tube.
  • Page 105 2. Closing the Beam Assembly LM1900E-SP Lawn Mower 5. Attach the rubber pad and base into the rectangle groove of the outer tube. 6. Close the top housing with the 13 tapping screws. Rectangle groove Rectangle groove Rubber pad and base...
  • Page 106 3. Replacing the Left/Right Inner Tube ASSY LM1900E-SP Lawn Mower 1. Remove the switch box covers (see Part 4). 2. Pull the top handle and remove it from the plastic bushings in the two side aluminum tubes. 3. Remove the beam housing (see page 4-5 in this guide)
  • Page 107 3. Replacing the Left/Right Inner Tube ASSY LM1900E-SP Lawn Mower 4. Pull the left/right inner tube assembly from the outer tube. 5. Replace damaged tubes. Right inner tube ASSY Left inner tube ASSY Description Part Number Left Inner Tube ASSY...
  • Page 108 3. Replacing the Left/Right Inner Tube ASSY LM1900E-SP Lawn Mower 6. Insert the left/right tube assembly into the outer tube. The inner side of The outer side the Tube ASSY of the Tube ASSY...
  • Page 109 3. Replacing the Left/Right Inner Tube ASSY LM1900E-SP Lawn Mower 7. Close the beam housing (see page 6-8 in this guide). 8. Mount the handle set and switch box covers back (See part 4). THE END...
  • Page 110 REPAIR GUIDELINE PART 6: Handle Lever Set_LM1900E-SP Lawn Mower...
  • Page 111 Handle Lever Set Replacement LM1900E-SP Lawn Mower Description Part Number Handle Lever Set 2826613001...
  • Page 112 Handle Lever Set Replacement LM1900E-SP Lawn Mower 1. Remove the two tapping screws (one in the decoration cover, another in the inner side of the left side tube. Description Part Number SPEC Hexagon Socket Screw 5620157006 M4.2x19...
  • Page 113 Handle Lever Set Replacement LM1900E-SP Lawn Mower 2. Remove the clamping ring with a flat head screwdriver . Flat head E Ring screwdriver Description Part Number E Ring 5660003003...
  • Page 114 Handle Lever Set Replacement LM1900E-SP Lawn Mower 3. Press the lever to loosen the pin and then draw it out. Draw the pin out Description Part Number 3550048003 Press the pin...
  • Page 115 Handle Lever Set Replacement LM1900E-SP Lawn Mower 4. Remove the spring, adjusting lever and decorative cover from the side tube. 5. Replace the damaged parts accordingly. Description Part Number Decorative Cover Assembly 3900177001 Handle Lever Set 2824250001 Spring 3660565001...
  • Page 116 Handle Lever Set Replacement LM1900E-SP Lawn Mower 6. Pass the adjusting lever through the decorative cover (Fig. 1). 7. Move the handle to Grass bag removal position. 8. Align the locking pin with the nut bushing, fully force the pin into the bushing and let the pin extend out of the side tube so that the handle can be locked at the position (Fig.
  • Page 117 Handle Lever Set Replacement LM1900E-SP Lawn Mower 9. Align the screw dome with the hole in the side tube and mount the decorative cover onto side tube. 10. Fix the spring between the adjusting lever and the side tube. Hole in the tube...
  • Page 118 Handle Lever Set Replacement LM1900E-SP Lawn Mower 11. Hold the tube and lever, depress the lever to align the hole in the lever with the hole in the plastic part. 12. Fully insert the pin and lock the pin with the clamping ring from the backside.
  • Page 119 Handle Lever Set Replacement LM1900E-SP Lawn Mower 13. Lock the decorative cover with two tapping screws. 14. Test the lever function to check if it can lock the handle at different positions. THE END...
  • Page 120 REPAIR GUIDELINE PART 7: Self-propelled Unit Replacement_LM1900E-SP Lawn Mower...
  • Page 121 Table of Contents LM1900E-SP Lawn Mower Contents Page Self-propelled PCBA and Unit Replacement Preparation Self-propelled PCBA Replacement Motor in Self-propelled Unit Replacement 7-16...
  • Page 122 1. Self-propelled PCBA and Unit Replacement Preparation LM1900E-SP Lawn Mower 1. Before replacing or maintaining the PCBA or parts in self-propelled unit, fold the handle to the grass bag removal position to remove the service cover from the mower. Service Cover...
  • Page 123 1. Self-propelled PCBA and Unit Replacement Preparation LM1900E-SP Lawn Mower 2. Detach the yellow connector, linking the self-propelled PCBA to the self-propelled motor. Service Cover Link to Self-propelled PCBA...
  • Page 124 1. Self-propelled PCBA and Unit Replacement Preparation LM1900E-SP Lawn Mower 3. Test the motor voltage between the three wires by using a multimeter. If the motor is open-circuit, disassembling the self-propelled unit and replace the motor. a) Set the multimeter function to “Resistance measuring”...
  • Page 125 2. Self-propelled PCBA Replacement LM1900E-SP Lawn Mower 1. Take out the self-propelled PCBA.( See in Part 2.1 “PCBA Replacement”). 2. Set the multimeter function to “Diode measuring” . 3. Contact the black pen pin to the positive contact with the yellow connector and the red pen pin to the three contacts of the triangle yellow plug ,then exchange the pen pins to measure (the red pen pin should contact to the negative contact).
  • Page 126 3. Motor in Self-propelled Unit Replacement LM1900E-SP Lawn Mower 1. Adjust the mower to the lowest cutting position . 2. Loosen the prevailing torque hexagon nut, separate the connecting rod from front axle. Description Part Number Spec Prevailing Torque Hexagon Nut...
  • Page 127 3. Motor in Self-propelled Unit Replacement LM1900E-SP Lawn Mower 3. Remove the power unit(See Part 2.1). 4. Loosen the 2 screws to detach decorative cover from the mower. Description Part Number SPEC Decorative cover assembly 3900085001 Hexagon Socket Screw 5620157006...
  • Page 128 3. Motor in Self-propelled Unit Replacement LM1900E-SP Lawn Mower 5. Adjust the mower to the highest cutting position and then turn the mower on its back. 6. Remove the 5 screws on the cover. Description Part Number Spec Cover 3129547001...
  • Page 129 3. Motor in Self-propelled Unit Replacement LM1900E-SP Lawn Mower 7. Remove the hexagon nut on the joint. Description Part Number Prevailing Torque Hexagon Nut 5630013003...
  • Page 130 3. Motor in Self-propelled Unit Replacement LM1900E-SP Lawn Mower 8. Loosen the tension spring from the connecting rod . Description Part Number Tension Spring 3660720001...
  • Page 131 3. Motor in Self-propelled Unit Replacement LM1900E-SP Lawn Mower 9. Remove the 4 screws 1# and 2 screws 2#. There are 2 plain washers under screw 2#. Screw 2# Screw 2# Screw 1# Plain washer Description Part Number SPEC Screw 1#...
  • Page 132 3. Motor in Self-propelled Unit Replacement LM1900E-SP Lawn Mower 10. Separate the self-propelled unit from the mower by prizing up the joint with screwdriver. Dust Cover Screwdriver Wheels 11. If the wheels are damaged, replace them(See Part 8). 12. If the height adjusting knob is damaged, replace it(See Part 9).
  • Page 133 3. Motor in Self-propelled Unit Replacement LM1900E-SP Lawn Mower 12. Remove the 4 screws 1# and 2 screws to open the dust cover. Screw 1# Screw 1# Screw Description Part Number SPEC Screw 1# 5620157006 M4.2x19 Screw 5620033010 M3x10...
  • Page 134 3. Motor in Self-propelled Unit Replacement LM1900E-SP Lawn Mower 8. Remove the 2 screws to detach the motor from the Self-Propelled Unit. Screw 1# Description Part Number SPEC Screw 1# 5620157006 M4.2x19...
  • Page 135 3. Motor in Self-propelled Unit Replacement LM1900E-SP Lawn Mower 9. Replace the damaged part, and then reassemble the motor in Self-propelled Unit. THE END...
  • Page 136 REPAIR GUIDELINE PART 8: Wheels Replacement_LM1900E-SP Lawn Mower...
  • Page 137 Table of Contents LM1900E-SP Lawn Mower Contents Page Rear Wheel Replacement Front Wheel Replacement 9-10...
  • Page 138 1. Rear Wheel Replacement LM1900E-SP Lawn Mower Gasket If the rear wheel is damaged, replace it. 1. Turn the mower on its back or side and separate the hubcap with a screwdriver. Hubcap Hex bolt Description Part Number SPEC Wheel Assembly...
  • Page 139 1. Rear Wheel Replacement LM1900E-SP Lawn Mower 2. Remove the hex bolt using a socket wrench (S=13mm) to separate the wheel assembly from its protective cap, which is fixed on the self-propelled unit. Hex bolt Socket wrench (S=13mm) Protecting Cap...
  • Page 140 1. Rear Wheel Replacement LM1900E-SP Lawn Mower Gasket 3. Remove the gear from the wheel assembly by loosening the 3 screws. 4. Replace with a new wheel assembly. Fix it onto the self-propelled unit in reverse order(Notice see next slide).
  • Page 141 1. Rear Wheel Replacement LM1900E-SP Lawn Mower Gasket NOTICE: During wheel reassembly, pay attention to which side of the gear faces the wheel. This side facing wheel This side facing protecting cap...
  • Page 142 1. Rear Wheel Replacement LM1900E-SP Lawn Mower 5. If the wheel protective cap is broken, replace it with a new one. Gasket 6. Loosen the screw and remove it with its spring washer and plain washer. Detach the wheel protective cap from the shaft as well as the wave washer.
  • Page 143 1. Rear Wheel Replacement LM1900E-SP Lawn Mower 7. Mount a new protecting cap onto the self-propelled unit shaft as well as the wave washer. Fix the cap by tightening the screw with spring washer . The recommended torque is 1.8-2.5Nm.
  • Page 144 2. Front Wheel Replacement LM1900E-SP Lawn Mower Gasket If the front wheel is damaged, replace it. 1. Separate the hubcap from the wheel and remove the hex bolt in the same way as the rear wheel. Front wheel Wheel Assembly...
  • Page 145 2. Front Wheel Replacement LM1900E-SP Lawn Mower Gasket 2. Replace with a new front wheel. 3. Mount it onto the axle with the wave washer beneath it. 4. If the axle is broken, replace it (see Part 10). Bent shaft...
  • Page 146 REPAIR GUIDELINE PART 9: Height Adjusting LeverReplacement_LM1900E-SP Lawn Mower...
  • Page 147 Height Adjusting Lever LM1900E-SP Lawn Mower Description Part Number SPEC Height Adjusting Lever 3128692001...
  • Page 148 Height Adjusting Lever Replacement LM1900E-SP Lawn Mower Gasket Before replacing the height adjusting lever, remove the self-propelled motor from the deck (See Part 7). 1. Straighten the pin with nipper pliers.
  • Page 149 Height Adjusting Lever Replacement LM1900E-SP Lawn Mower Gasket 2. Remove the pin from the hole.
  • Page 150 Height Adjusting Lever Replacement LM1900E-SP Lawn Mower Gasket 3. Loosen torsion spring from the handle lever set, remove the handle lever set from the self-propelled unit .
  • Page 151 Height Adjusting Lever Replacement LM1900E-SP Lawn Mower Gasket 4. Loosen the screw to separate height adjusting lever and handle lever set, replace the damaged part. Handle lever set Height adjusting lever Screw Torsion spring Description Part Number SPEC 5670184002 Height adjusting lever...
  • Page 152 Height Adjusting Lever Replacement LM1900E-SP Lawn Mower Gasket 5. Tighten the screw to fix height adjusting lever and handle lever set, insert them into the holes on the self-propelled unit .
  • Page 153 Height Adjusting Lever Replacement LM1900E-SP Lawn Mower Gasket 6. Insert the pin into the handle lever set.
  • Page 154 Height Adjusting Lever Replacement LM1900E-SP Lawn Mower Gasket 7. Bend the pin with nose pliers . THE END...
  • Page 155 REPAIR GUIDELINE PART 10: Parts on Housing Cover Replacement_LM1900E-SP Lawn Mower...
  • Page 156 Table of Contents LM1900E-SP Lawn Mower Contents Page Support ASSY and Support Plate Replacement Decorative Cover ASSY Replacement Connecting Rod ASSY Replacement Front Axle Replacement 9-11...
  • Page 157 1. Support ASSY and Support Plate Replacement LM1900E-SP Lawn Mower Gasket Support plate Support assembly...
  • Page 158 1. Support ASSY and Support Plate Replacement LM1900E-SP Lawn Mower Gasket 1. Remove the service cover(see Part 2.1). 2. Remove the handle assembly(Fig1,2,3). 3. Remove the rear cover(see Part 3).
  • Page 159 1. Support ASSY and Support Plate Replacement LM1900E-SP Lawn Mower 4. Loosen 7 screws to remove the support plate and the support assembly, replace the damaged part. Assemble it in reverse order. Support assembly Support plate Description Part Number SPEC...
  • Page 160 2. Decorative Cover ASSY Replacement LM1900E-SP Lawn Mower 1. Remove the service cover and power unit(see Part 2.1). 2. Loosen the 4 screws to remove the decorative cover assembly. 3. . Decorative cover assembly Gasket Description Part Number SPEC Decorative cover assembly...
  • Page 161 3. Connecting Rod ASSY Replacement LM1900E-SP Lawn Mower 1. Remove the decorative cover assembly as step 2 in this guideline. 2. Detach the connecting rod from the self-propelled unit(see step 3 in Part 7). 3. Loosen the prevailing torque hexagon nut, separate the connecting rod from front axle.
  • Page 162 3. Connecting Rod ASSY Replacement LM1900E-SP Lawn Mower 4. Turn the mower on its side. 5. Pull out the connecting rod ,replace it with a new one. Assemble it in reverse order. Prevailing torque hexagon nut Connecting rod assembly Description...
  • Page 163 4. Front Axle Replacement LM1900E-SP Lawn Mower 1. If the front axle is damaged, remove connecting Rod assembly as previous steps show. Front axle...
  • Page 164 4. Front Axle Replacement LM1900E-SP Lawn Mower 2. Loosen the 4 screws to remove the front axle with wheels. Description Part Number Hexagon Socket Screw 5620157006 Left Mounting Plate 3706719001 Right Mounting Plate 3706864001 Front Axle Set 2825956001...
  • Page 165 4. Front Axle Replacement LM1900E-SP Lawn Mower 6. Disassemble the front wheels(see Part 8). 7. Replace the broken front axle with a new one. 8. Mount the wheels onto the new front axle(see part 8). 9. Mount the front axle into the...