{
  "id": "lst300-handle-fit",
  "version": "2.0.0",
  "title": "Fit the supplied auxiliary handle",
  "deviceFamily": "garden",
  "group": "lst300-guard",
  "intent": "Maintenance",
  "summary": "Match the grooved handle and housing button, attach the original handle and verify its snap fit before adjusting the stance.",
  "modelApplicability": [
    "lst300-us"
  ],
  "modelDetails": [
    {
      "id": "lst300-us",
      "family": "garden",
      "brand": "BLACK+DECKER",
      "series": "LST300",
      "label": "BLACK+DECKER LST300 · US · AF-100",
      "region": "US",
      "componentVersion": "Automatic-feed head with AF-100 spool; match model and tool type to manual",
      "manual": "lst300-manual",
      "help": "Remove the battery. Find LST300 and the adjacent type number on the tool label. Compare the guard, cap, spool and assembly figures with the linked LST300 manual. Use ServiceNet for your exact type if they differ. LST300 is not a bump-feed head.",
      "exclusions": [
        "LST420 / LSTE525",
        "GH corded models",
        "Dual-line heads",
        "Metal line or blades",
        "Nonmatching tool type or modified head"
      ],
      "recognitionSource": "bd-manual-help"
    }
  ],
  "exclusions": [
    "LST420 / LSTE525",
    "GH corded models",
    "Dual-line heads",
    "Metal line or blades",
    "Nonmatching tool type or modified head",
    "Unknown tool type or missing exact-type manual",
    "Bump-feed conversion"
  ],
  "prerequisites": [
    "Release the trigger, let the head stop, engage the lock-off and remove the battery. Leave it removed throughout hands-on care. Keep fingers away from the sharp cutter on the guard.",
    "Read LST300 and the tool type from the label. Open the official model/type lookup and compare its manual and parts figures with your actual guard, single-line head and AF-100 spool. A readable model name alone does not establish the type. If the exact type manual cannot be obtained, or any figure differs, save a preparation record and stop."
  ],
  "tools": [
    "Good lighting"
  ],
  "materials": [
    "Original supplied undamaged auxiliary handle"
  ],
  "checks": [
    {
      "id": "safety",
      "prompt": "Is the battery removed, the trigger released and the cutting head stopped, with no battery damage, exposed wiring or faulty switch?",
      "sourceId": "lst300-manual",
      "sourceLocator": "English pp2–3 Safety; p8 Installing and removing the battery pack",
      "options": [
        {
          "id": "yes",
          "label": "Yes",
          "next": "compatibility",
          "advice": "Keep the battery removed for every hands-on step."
        },
        {
          "id": "no",
          "label": "No",
          "next": "service",
          "advice": "Stop using the tool for electrical, battery or switch damage. If you have only omitted battery removal, make the tool safe before restarting."
        },
        {
          "id": "unsure",
          "label": "Not sure",
          "next": "prepared",
          "advice": "Keep the battery removed. Save your preparation record and check the matching manual before continuing."
        }
      ]
    },
    {
      "id": "compatibility",
      "prompt": "Have you matched the label LST300 AND its exact tool type to the official lookup manual and its figures, with the original AF-100 automatic single-line head?",
      "sourceId": "bd-manual-help",
      "sourceLocator": "Official model/type lookup instructions; type is beside or below the model number",
      "options": [
        {
          "id": "yes",
          "label": "Yes",
          "next": "check-1",
          "advice": "Record the label type and matching manual reference in the first step."
        },
        {
          "id": "no",
          "label": "No",
          "next": "prepared",
          "advice": "An unknown type, unavailable type manual, different figures, bump-feed head or dual-line conversion blocks this procedure. Use manufacturer support to identify the correct instructions."
        },
        {
          "id": "unsure",
          "label": "Not sure",
          "next": "prepared",
          "advice": "Keep the battery removed. Save your preparation record and check the matching manual before continuing."
        }
      ]
    },
    {
      "id": "check-1",
      "prompt": "Is this the original supplied handle for initial assembly, with the grooved attachment shown in figs F–H?",
      "sourceId": "lst300-manual",
      "sourceLocator": "English p8 Attaching the auxiliary handle; figs F–H",
      "options": [
        {
          "id": "yes",
          "label": "Yes",
          "next": "check-2",
          "advice": "Use the assembly buttons on both sides of the upper housing."
        },
        {
          "id": "no",
          "label": "No",
          "next": "prepared",
          "advice": "For an already fitted handle use the adjustment task. Different or damaged handles require exact-type support."
        },
        {
          "id": "unsure",
          "label": "Not sure",
          "next": "prepared",
          "advice": "Keep the battery removed. Save your preparation record and check the matching manual before continuing."
        }
      ]
    },
    {
      "id": "check-2",
      "prompt": "Are both housing buttons and the handle attachment points intact?",
      "sourceId": "lst300-manual",
      "sourceLocator": "English p8 Attaching the auxiliary handle; figs F–H",
      "options": [
        {
          "id": "yes",
          "label": "Yes",
          "next": "steps",
          "advice": "Align the matching grooved surfaces before pressing the handle on."
        },
        {
          "id": "no",
          "label": "No",
          "next": "service",
          "advice": "Do not attach a handle to broken or damaged supports."
        },
        {
          "id": "unsure",
          "label": "Not sure",
          "next": "prepared",
          "advice": "Keep the battery removed. Save your preparation record and check the matching manual before continuing."
        }
      ]
    }
  ],
  "branches": [
    {
      "checkId": "safety",
      "optionId": "yes",
      "next": "compatibility"
    },
    {
      "checkId": "safety",
      "optionId": "no",
      "next": "service"
    },
    {
      "checkId": "safety",
      "optionId": "unsure",
      "next": "prepared"
    },
    {
      "checkId": "compatibility",
      "optionId": "yes",
      "next": "check-1"
    },
    {
      "checkId": "compatibility",
      "optionId": "no",
      "next": "prepared"
    },
    {
      "checkId": "compatibility",
      "optionId": "unsure",
      "next": "prepared"
    },
    {
      "checkId": "check-1",
      "optionId": "yes",
      "next": "check-2"
    },
    {
      "checkId": "check-1",
      "optionId": "no",
      "next": "prepared"
    },
    {
      "checkId": "check-1",
      "optionId": "unsure",
      "next": "prepared"
    },
    {
      "checkId": "check-2",
      "optionId": "yes",
      "next": "steps"
    },
    {
      "checkId": "check-2",
      "optionId": "no",
      "next": "service"
    },
    {
      "checkId": "check-2",
      "optionId": "unsure",
      "next": "prepared"
    }
  ],
  "steps": [
    {
      "title": "Record the exact tool and make it safe",
      "text": "Release the trigger, let the head stop, engage the lock-off and remove the battery. Leave it removed throughout hands-on care. Keep fingers away from the sharp cutter on the guard. Read LST300 and the tool type from the label. Open the official model/type lookup and compare its manual and parts figures with your actual guard, single-line head and AF-100 spool. A readable model name alone does not establish the type. If the exact type manual cannot be obtained, or any figure differs, save a preparation record and stop.",
      "observation": "The battery is physically separate from the tool; your label type and matching manual reference are written below.",
      "sourceId": "bd-manual-help",
      "sourceLocator": "Official model/type lookup instructions; type is beside or below the model number",
      "requiredFields": [
        "tool-type",
        "matched-manual"
      ],
      "id": "step-1"
    },
    {
      "title": "Identify the assembly features",
      "text": "With the tool supported and battery removed, identify the two upper-housing buttons marked 12 in fig F. Compare the grooved handle side with the grooved housing button in fig G.",
      "observation": "The matching grooved sides and both assembly buttons are identifiable.",
      "sourceId": "lst300-manual",
      "sourceLocator": "English p8 Attaching the auxiliary handle; figs F–H",
      "id": "step-2"
    },
    {
      "title": "Press the two housing buttons",
      "text": "Press the buttons on both sides of the upper housing as fig F shows. Keep the handle in the orientation pictured in fig G; avoid trapping fingers between the handle and housing.",
      "observation": "Both buttons are depressed and the handle approaches in its matching orientation.",
      "sourceId": "lst300-manual",
      "sourceLocator": "English p8 Attaching the auxiliary handle; figs F–H",
      "id": "step-3"
    },
    {
      "title": "Start the handle on the matching grooves",
      "text": "Partially push the handle onto the housing, matching its grooved side to the grooved button. This initial position should hold the buttons in when your hand releases them, as the manual describes.",
      "observation": "The partly fitted handle holds the buttons in without being forced across the grooves.",
      "sourceId": "lst300-manual",
      "sourceLocator": "English p8 Attaching the auxiliary handle; figs F–H",
      "id": "step-4"
    },
    {
      "title": "Complete the snap fit",
      "text": "Push the handle fully onto the housing and adjust its position slightly until it snaps into place as fig H shows. If it resists or fails to engage, stop and recheck the matching parts; do not strike or modify them.",
      "observation": "The handle is fully attached and remains held when released.",
      "sourceId": "lst300-manual",
      "sourceLocator": "English p8 Attaching the auxiliary handle; figs F–H",
      "id": "step-5"
    },
    {
      "title": "Check attachment and plan adjustment",
      "text": "Check that the handle stays attached. Use its adjustment button to select an angle, then follow the handle-and-height task for the full working stance. Record the fitting result and keep the battery out until after-care.",
      "observation": "The original handle is retained; height and stance are checked in the linked adjustment task.",
      "sourceId": "lst300-manual",
      "sourceLocator": "English p8 Attaching the auxiliary handle; figs F–H",
      "id": "step-6"
    }
  ],
  "outcomeChecks": [
    {
      "id": "outcome-1",
      "text": "Grooved handle and button are correctly matched and the handle is fully snapped onto the housing.",
      "sourceId": "lst300-manual",
      "sourceLocator": "English p8 Attaching the auxiliary handle; figs F–H"
    },
    {
      "id": "outcome-2",
      "text": "The attached handle remains secure before height adjustment or normal use.",
      "sourceId": "lst300-manual",
      "sourceLocator": "English p8 Attaching the auxiliary handle; figs F–H"
    }
  ],
  "stopConditions": [
    "Keep the battery removed if the exact type/manual match is unknown or parts differ from the figures.",
    "Stop for a damaged battery, exposed wiring, a faulty switch, cracked guard, broken spool/hub, damaged cap tabs or housing slots. Use an authorized service center. Never open the battery, motor housing or charger."
  ],
  "sources": [
    {
      "id": "lst300-manual",
      "title": "BLACK+DECKER LST300 instruction manual (manufacturer document, retailer-hosted)",
      "url": "https://pdf.lowes.com/productdocuments/1935f26b-7448-4c95-b467-a223bb73d80f/63056925.pdf",
      "checkedAt": "2026-10-13",
      "use": "Safety, assembly, replacement spool/line, maintenance and troubleshooting. Match the tool type and figures before use.",
      "license": "Manufacturer copyright, hosted by Lowe’s. Facts paraphrased; no diagrams or manual redistributed.",
      "region": "US",
      "locator": "English p8 Attaching the auxiliary handle; figs F–H"
    },
    {
      "id": "bd-manual-help",
      "title": "BLACK+DECKER: locate a manual using model and type number",
      "url": "https://support.blackanddecker.com/hc/en-us/articles/360012700118-How-can-I-get-a-parts-list-or-manual-for-my-tool",
      "checkedAt": "2026-10-13",
      "use": "Model/type number identification and authoritative ServiceNet lookup",
      "license": "Linked only.",
      "region": "US",
      "locator": "Official model/type lookup instructions; type is beside or below the model number"
    },
    {
      "id": "lst300-product",
      "title": "BLACK+DECKER LST300 product and support",
      "url": "https://www.blackanddecker.com/products/lst300",
      "checkedAt": "2026-10-13",
      "use": "Model identity, automatic feed, AF-100 included spool",
      "license": "Linked only; no product photos reused.",
      "region": "US",
      "locator": "LST300 model identity; Automatic Feed Spool; Includes AF-100"
    }
  ],
  "assets": [
    {
      "path": "/assets/garden/handle-fit.svg",
      "title": "Two-button release, grooved alignment and full handle snap fit",
      "kind": "Original sequence schematic; compare the exact tool-type manual for shape and location",
      "sourceId": "lst300-manual"
    }
  ],
  "relatedIds": [
    "lst300-handle-adjust",
    "lst300-after-care"
  ],
  "specs": [],
  "recordFields": [
    {
      "id": "tool-type",
      "label": "Tool type exactly as printed on the label",
      "type": "text",
      "required": true,
      "dependsOnStep": "step-1"
    },
    {
      "id": "matched-manual",
      "label": "Exact-type manual reference or link that you matched",
      "type": "text",
      "required": true,
      "dependsOnStep": "step-1"
    },
    {
      "id": "handle-match",
      "label": "Supplied handle and groove match checked",
      "type": "text",
      "required": true,
      "dependsOnStep": "step-2"
    },
    {
      "id": "handle-attached",
      "label": "Handle snapped fully into place and stays attached",
      "type": "checkbox",
      "required": true,
      "dependsOnStep": "step-5"
    },
    {
      "id": "final-result",
      "label": "Result of this task",
      "type": "select",
      "options": [
        {
          "value": "ready",
          "label": "Checks passed; ready for the stated next step"
        },
        {
          "value": "follow-up",
          "label": "More preparation or a linked task is needed",
          "resultGate": "prepared"
        },
        {
          "value": "service",
          "label": "Leave unused and contact service",
          "resultGate": "service"
        }
      ],
      "required": true,
      "dependsOnStep": "step-6"
    }
  ],
  "consumables": [
    {
      "name": "Auxiliary handle if a replacement is needed",
      "specification": "Exact LST300 tool-type part from manufacturer support",
      "fit": "Original documented groove and two-button mounting",
      "exclude": "Unverified handle, altered grooves, broken housing buttons",
      "sourceId": "lst300-manual",
      "sourceLocator": "English p8 Attaching the auxiliary handle; figs F–H"
    }
  ],
  "maintenance": {
    "trigger": "Initial assembly of the original supplied auxiliary handle",
    "intervalText": "Fit during initial assembly; use the separate adjustment task when changing the working stance.",
    "basis": "manufacturer",
    "sourceId": "lst300-manual",
    "sourceLocator": "English p8 Attaching the auxiliary handle; figs F–H"
  },
  "updatedAt": "2026-10-13",
  "estimatedDuration": null,
  "fitChecks": [
    {
      "id": "type",
      "label": "Model and tool type",
      "accepted": "matched",
      "options": [
        {
          "value": "",
          "label": "Choose the version you can confirm"
        },
        {
          "value": "matched",
          "label": "LST300 and the exact type on my label match my manufacturer manual and figures"
        },
        {
          "value": "different",
          "label": "My type or manual figures differ"
        },
        {
          "value": "unchecked",
          "label": "I have not checked the type number"
        },
        {
          "value": "unknown",
          "label": "I am not sure"
        }
      ],
      "help": "Remove the battery before finding the label. Use the manufacturer model-and-type lookup; this site does not infer a type number from LST300 alone."
    },
    {
      "id": "head",
      "label": "Cutting head",
      "accepted": "af100",
      "options": [
        {
          "value": "",
          "label": "Choose the version you can confirm"
        },
        {
          "value": "af100",
          "label": "Original AF-100 automatic-feed single-line head"
        },
        {
          "value": "bump",
          "label": "Bump-feed head"
        },
        {
          "value": "dual",
          "label": "Dual-line or modified head"
        },
        {
          "value": "metal",
          "label": "Metal line or blade"
        },
        {
          "value": "unknown",
          "label": "I am not sure"
        }
      ],
      "help": "Do not substitute a bump-feed procedure, dual-line spool or metal cutting attachment."
    }
  ]
}