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[{"id":12272187834708,"title":"Idler for CAT 300.9D","handle":"cat-300-9d-idler","description":"\u003cp style=\"margin:0 0 1.4rem;font-size:1.5rem;line-height:1.55;color:#201f1e\"\u003eReplacement \u003cstrong\u003eCAT 300.9D idler\u003c\/strong\u003e, guaranteed to fit the CAT 300.9D. Idlers guide the track around the ends of the track frame.\u003c\/p\u003e\u003cul style=\"display:flex;flex-wrap:wrap;gap:0.8rem;list-style:none;padding:0;margin:0 0 1.4rem\"\u003e\n\u003cli style=\"flex:0 0 calc(50% - 0.4rem);box-sizing:border-box;margin:0;padding:0.9rem 1.2rem;background:#f2f2f2;border-radius:0.6rem;list-style:none\"\u003e\n\u003cspan style=\"display:block;font-size:1.1rem;letter-spacing:0.06em;text-transform:uppercase;color:#6b6a69\"\u003ePer machine\u003c\/span\u003e\u003cstrong style=\"display:block;font-size:1.5rem;line-height:1.3;color:#201f1e;font-weight:600\"\u003e2\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli style=\"flex:0 0 calc(50% - 0.4rem);box-sizing:border-box;margin:0;padding:0.9rem 1.2rem;background:#f2f2f2;border-radius:0.6rem;list-style:none\"\u003e\n\u003cspan style=\"display:block;font-size:1.1rem;letter-spacing:0.06em;text-transform:uppercase;color:#6b6a69\"\u003eWarranty\u003c\/span\u003e\u003cstrong style=\"display:block;font-size:1.5rem;line-height:1.3;color:#201f1e;font-weight:600\"\u003e12 months\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli style=\"flex:0 0 calc(50% - 0.4rem);box-sizing:border-box;margin:0;padding:0.9rem 1.2rem;background:#f2f2f2;border-radius:0.6rem;list-style:none\"\u003e\n\u003cspan style=\"display:block;font-size:1.1rem;letter-spacing:0.06em;text-transform:uppercase;color:#6b6a69\"\u003eWeight\u003c\/span\u003e\u003cstrong style=\"display:block;font-size:1.5rem;line-height:1.3;color:#201f1e;font-weight:600\"\u003e19.4 lb\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cul style=\"display:flex;flex-wrap:wrap;gap:0.4rem 1.6rem;list-style:none;padding:0;margin:0 0 1.6rem\"\u003e\n\u003cli style=\"flex:1 1 18rem;margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e;list-style:none\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"color:#f47a1f;font-weight:700;margin-right:0.6rem\"\u003e✓\u003c\/span\u003eHeat-treated steel casing\u003c\/li\u003e\n\u003cli style=\"flex:1 1 18rem;margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e;list-style:none\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"color:#f47a1f;font-weight:700;margin-right:0.6rem\"\u003e✓\u003c\/span\u003eSealed, oil-filled shaft and bearings\u003c\/li\u003e\n\u003cli style=\"flex:1 1 18rem;margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e;list-style:none\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"color:#f47a1f;font-weight:700;margin-right:0.6rem\"\u003e✓\u003c\/span\u003eHeavy-duty seals\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e\"\u003eShop more: \u003ca href=\"\/collections\/cat-idlers\" style=\"color:#201f1e;text-decoration:underline\"\u003eCAT idlers\u003c\/a\u003e · \u003ca href=\"\/collections\/idler\" style=\"color:#201f1e;text-decoration:underline\"\u003eAll idlers\u003c\/a\u003e\u003c\/p\u003e","published_at":"2025-09-24T14:49:56-04:00","created_at":"2025-09-24T14:49:56-04:00","vendor":"CAT","type":"Idler","tags":["CAT","CAT 300.9D","CAT 300.9D Idler","Idler"],"price":17000,"price_min":17000,"price_max":17000,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":55618554855764,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"ID072\/293\/00","requires_shipping":true,"taxable":true,"featured_image":{"id":85557096808788,"product_id":12272187834708,"position":1,"created_at":"2026-04-24T07:58:37-04:00","updated_at":"2026-04-24T07:58:37-04:00","alt":"Idler for CAT 300.9D","width":1000,"height":1000,"src":"\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_1_60127_0baa3691-f521-42f7-b18a-390a2c4b2bea.webp?v=1777031917","variant_ids":[55618554855764]},"available":true,"name":"Idler for CAT 300.9D","public_title":null,"options":["Default Title"],"price":17000,"weight":8800,"compare_at_price":null,"inventory_management":"shopify","barcode":null,"featured_media":{"alt":"Idler for CAT 300.9D","id":69410979119444,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_1_60127_0baa3691-f521-42f7-b18a-390a2c4b2bea.webp?v=1777031917"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_1_60127_0baa3691-f521-42f7-b18a-390a2c4b2bea.webp?v=1777031917"],"featured_image":"\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_1_60127_0baa3691-f521-42f7-b18a-390a2c4b2bea.webp?v=1777031917","options":["Title"],"media":[{"alt":"Idler for CAT 300.9D","id":69410979119444,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_1_60127_0baa3691-f521-42f7-b18a-390a2c4b2bea.webp?v=1777031917"},"aspect_ratio":1.0,"height":1000,"media_type":"image","src":"\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_1_60127_0baa3691-f521-42f7-b18a-390a2c4b2bea.webp?v=1777031917","width":1000}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp style=\"margin:0 0 1.4rem;font-size:1.5rem;line-height:1.55;color:#201f1e\"\u003eReplacement \u003cstrong\u003eCAT 300.9D idler\u003c\/strong\u003e, guaranteed to fit the CAT 300.9D. Idlers guide the track around the ends of the track frame.\u003c\/p\u003e\u003cul style=\"display:flex;flex-wrap:wrap;gap:0.8rem;list-style:none;padding:0;margin:0 0 1.4rem\"\u003e\n\u003cli style=\"flex:0 0 calc(50% - 0.4rem);box-sizing:border-box;margin:0;padding:0.9rem 1.2rem;background:#f2f2f2;border-radius:0.6rem;list-style:none\"\u003e\n\u003cspan style=\"display:block;font-size:1.1rem;letter-spacing:0.06em;text-transform:uppercase;color:#6b6a69\"\u003ePer machine\u003c\/span\u003e\u003cstrong style=\"display:block;font-size:1.5rem;line-height:1.3;color:#201f1e;font-weight:600\"\u003e2\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli style=\"flex:0 0 calc(50% - 0.4rem);box-sizing:border-box;margin:0;padding:0.9rem 1.2rem;background:#f2f2f2;border-radius:0.6rem;list-style:none\"\u003e\n\u003cspan style=\"display:block;font-size:1.1rem;letter-spacing:0.06em;text-transform:uppercase;color:#6b6a69\"\u003eWarranty\u003c\/span\u003e\u003cstrong style=\"display:block;font-size:1.5rem;line-height:1.3;color:#201f1e;font-weight:600\"\u003e12 months\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli style=\"flex:0 0 calc(50% - 0.4rem);box-sizing:border-box;margin:0;padding:0.9rem 1.2rem;background:#f2f2f2;border-radius:0.6rem;list-style:none\"\u003e\n\u003cspan style=\"display:block;font-size:1.1rem;letter-spacing:0.06em;text-transform:uppercase;color:#6b6a69\"\u003eWeight\u003c\/span\u003e\u003cstrong style=\"display:block;font-size:1.5rem;line-height:1.3;color:#201f1e;font-weight:600\"\u003e19.4 lb\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cul style=\"display:flex;flex-wrap:wrap;gap:0.4rem 1.6rem;list-style:none;padding:0;margin:0 0 1.6rem\"\u003e\n\u003cli style=\"flex:1 1 18rem;margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e;list-style:none\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"color:#f47a1f;font-weight:700;margin-right:0.6rem\"\u003e✓\u003c\/span\u003eHeat-treated steel casing\u003c\/li\u003e\n\u003cli style=\"flex:1 1 18rem;margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e;list-style:none\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"color:#f47a1f;font-weight:700;margin-right:0.6rem\"\u003e✓\u003c\/span\u003eSealed, oil-filled shaft and bearings\u003c\/li\u003e\n\u003cli style=\"flex:1 1 18rem;margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e;list-style:none\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"color:#f47a1f;font-weight:700;margin-right:0.6rem\"\u003e✓\u003c\/span\u003eHeavy-duty seals\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e\"\u003eShop more: \u003ca href=\"\/collections\/cat-idlers\" style=\"color:#201f1e;text-decoration:underline\"\u003eCAT idlers\u003c\/a\u003e · \u003ca href=\"\/collections\/idler\" style=\"color:#201f1e;text-decoration:underline\"\u003eAll idlers\u003c\/a\u003e\u003c\/p\u003e"},{"id":12272187965780,"title":"Bottom Roller for CAT 300.9D","handle":"cat-300-9d-bottom-roller","description":"\u003cp style=\"margin:0 0 1.4rem;font-size:1.5rem;line-height:1.55;color:#201f1e\"\u003eReplacement \u003cstrong\u003eCAT 300.9D bottom roller\u003c\/strong\u003e (track roller), guaranteed to fit the CAT 300.9D. Bottom rollers run along the underside of the track frame and carry the weight of the machine on the track.\u003c\/p\u003e\u003cul style=\"display:flex;flex-wrap:wrap;gap:0.8rem;list-style:none;padding:0;margin:0 0 1.4rem\"\u003e\n\u003cli style=\"flex:0 0 calc(50% - 0.4rem);box-sizing:border-box;margin:0;padding:0.9rem 1.2rem;background:#f2f2f2;border-radius:0.6rem;list-style:none\"\u003e\n\u003cspan style=\"display:block;font-size:1.1rem;letter-spacing:0.06em;text-transform:uppercase;color:#6b6a69\"\u003ePer machine\u003c\/span\u003e\u003cstrong style=\"display:block;font-size:1.5rem;line-height:1.3;color:#201f1e;font-weight:600\"\u003e4\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli style=\"flex:0 0 calc(50% - 0.4rem);box-sizing:border-box;margin:0;padding:0.9rem 1.2rem;background:#f2f2f2;border-radius:0.6rem;list-style:none\"\u003e\n\u003cspan style=\"display:block;font-size:1.1rem;letter-spacing:0.06em;text-transform:uppercase;color:#6b6a69\"\u003eWarranty\u003c\/span\u003e\u003cstrong style=\"display:block;font-size:1.5rem;line-height:1.3;color:#201f1e;font-weight:600\"\u003e12 months\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli style=\"flex:0 0 calc(50% - 0.4rem);box-sizing:border-box;margin:0;padding:0.9rem 1.2rem;background:#f2f2f2;border-radius:0.6rem;list-style:none\"\u003e\n\u003cspan style=\"display:block;font-size:1.1rem;letter-spacing:0.06em;text-transform:uppercase;color:#6b6a69\"\u003eWeight\u003c\/span\u003e\u003cstrong style=\"display:block;font-size:1.5rem;line-height:1.3;color:#201f1e;font-weight:600\"\u003e7.9 lb\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cul style=\"display:flex;flex-wrap:wrap;gap:0.4rem 1.6rem;list-style:none;padding:0;margin:0 0 1.6rem\"\u003e\n\u003cli style=\"flex:1 1 18rem;margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e;list-style:none\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"color:#f47a1f;font-weight:700;margin-right:0.6rem\"\u003e✓\u003c\/span\u003eHeat-treated steel casing\u003c\/li\u003e\n\u003cli style=\"flex:1 1 18rem;margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e;list-style:none\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"color:#f47a1f;font-weight:700;margin-right:0.6rem\"\u003e✓\u003c\/span\u003eSealed, oil-filled shaft and bearings\u003c\/li\u003e\n\u003cli style=\"flex:1 1 18rem;margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e;list-style:none\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"color:#f47a1f;font-weight:700;margin-right:0.6rem\"\u003e✓\u003c\/span\u003eHeavy-duty seals\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e\"\u003eShop more: \u003ca href=\"\/collections\/cat-track-rollers\" style=\"color:#201f1e;text-decoration:underline\"\u003eCAT track rollers\u003c\/a\u003e · \u003ca href=\"\/collections\/track-roller\" style=\"color:#201f1e;text-decoration:underline\"\u003eAll track rollers\u003c\/a\u003e\u003c\/p\u003e","published_at":"2025-09-24T14:49:59-04:00","created_at":"2025-09-24T14:49:59-04:00","vendor":"CAT","type":"Track Roller","tags":["CAT","CAT 300.9D","CAT 300.9D Track Roller","Track Roller"],"price":12300,"price_min":12300,"price_max":12300,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":55618554921300,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"TR072\/297\/00","requires_shipping":true,"taxable":true,"featured_image":{"id":85557096939860,"product_id":12272187965780,"position":2,"created_at":"2026-04-24T07:58:40-04:00","updated_at":"2026-04-24T07:58:40-04:00","alt":"Bottom Roller for CAT 300.9D","width":1000,"height":1000,"src":"\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_2_60132_8c00f95c-856c-4127-a634-db66258d210f.webp?v=1777031920","variant_ids":[55618554921300]},"available":true,"name":"Bottom Roller for CAT 300.9D","public_title":null,"options":["Default Title"],"price":12300,"weight":3602,"compare_at_price":null,"inventory_management":"shopify","barcode":null,"featured_media":{"alt":"Bottom Roller for CAT 300.9D","id":69410979840340,"position":2,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_2_60132_8c00f95c-856c-4127-a634-db66258d210f.webp?v=1777031920"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_1_60132_02705811-f8de-410d-9950-bc9b0cf09893.webp?v=1777031920","\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_2_60132_8c00f95c-856c-4127-a634-db66258d210f.webp?v=1777031920"],"featured_image":"\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_1_60132_02705811-f8de-410d-9950-bc9b0cf09893.webp?v=1777031920","options":["Title"],"media":[{"alt":"Bottom Roller for CAT 300.9D","id":69410979807572,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_1_60132_02705811-f8de-410d-9950-bc9b0cf09893.webp?v=1777031920"},"aspect_ratio":1.0,"height":1000,"media_type":"image","src":"\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_1_60132_02705811-f8de-410d-9950-bc9b0cf09893.webp?v=1777031920","width":1000},{"alt":"Bottom Roller for CAT 300.9D","id":69410979840340,"position":2,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_2_60132_8c00f95c-856c-4127-a634-db66258d210f.webp?v=1777031920"},"aspect_ratio":1.0,"height":1000,"media_type":"image","src":"\/\/excavatorpartsdirect.com\/cdn\/shop\/files\/custrecord_image_2_60132_8c00f95c-856c-4127-a634-db66258d210f.webp?v=1777031920","width":1000}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp style=\"margin:0 0 1.4rem;font-size:1.5rem;line-height:1.55;color:#201f1e\"\u003eReplacement \u003cstrong\u003eCAT 300.9D bottom roller\u003c\/strong\u003e (track roller), guaranteed to fit the CAT 300.9D. Bottom rollers run along the underside of the track frame and carry the weight of the machine on the track.\u003c\/p\u003e\u003cul style=\"display:flex;flex-wrap:wrap;gap:0.8rem;list-style:none;padding:0;margin:0 0 1.4rem\"\u003e\n\u003cli style=\"flex:0 0 calc(50% - 0.4rem);box-sizing:border-box;margin:0;padding:0.9rem 1.2rem;background:#f2f2f2;border-radius:0.6rem;list-style:none\"\u003e\n\u003cspan style=\"display:block;font-size:1.1rem;letter-spacing:0.06em;text-transform:uppercase;color:#6b6a69\"\u003ePer machine\u003c\/span\u003e\u003cstrong style=\"display:block;font-size:1.5rem;line-height:1.3;color:#201f1e;font-weight:600\"\u003e4\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli style=\"flex:0 0 calc(50% - 0.4rem);box-sizing:border-box;margin:0;padding:0.9rem 1.2rem;background:#f2f2f2;border-radius:0.6rem;list-style:none\"\u003e\n\u003cspan style=\"display:block;font-size:1.1rem;letter-spacing:0.06em;text-transform:uppercase;color:#6b6a69\"\u003eWarranty\u003c\/span\u003e\u003cstrong style=\"display:block;font-size:1.5rem;line-height:1.3;color:#201f1e;font-weight:600\"\u003e12 months\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli style=\"flex:0 0 calc(50% - 0.4rem);box-sizing:border-box;margin:0;padding:0.9rem 1.2rem;background:#f2f2f2;border-radius:0.6rem;list-style:none\"\u003e\n\u003cspan style=\"display:block;font-size:1.1rem;letter-spacing:0.06em;text-transform:uppercase;color:#6b6a69\"\u003eWeight\u003c\/span\u003e\u003cstrong style=\"display:block;font-size:1.5rem;line-height:1.3;color:#201f1e;font-weight:600\"\u003e7.9 lb\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cul style=\"display:flex;flex-wrap:wrap;gap:0.4rem 1.6rem;list-style:none;padding:0;margin:0 0 1.6rem\"\u003e\n\u003cli style=\"flex:1 1 18rem;margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e;list-style:none\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"color:#f47a1f;font-weight:700;margin-right:0.6rem\"\u003e✓\u003c\/span\u003eHeat-treated steel casing\u003c\/li\u003e\n\u003cli style=\"flex:1 1 18rem;margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e;list-style:none\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"color:#f47a1f;font-weight:700;margin-right:0.6rem\"\u003e✓\u003c\/span\u003eSealed, oil-filled shaft and bearings\u003c\/li\u003e\n\u003cli style=\"flex:1 1 18rem;margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e;list-style:none\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"color:#f47a1f;font-weight:700;margin-right:0.6rem\"\u003e✓\u003c\/span\u003eHeavy-duty seals\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin:0;font-size:1.4rem;line-height:1.5;color:#201f1e\"\u003eShop more: \u003ca href=\"\/collections\/cat-track-rollers\" style=\"color:#201f1e;text-decoration:underline\"\u003eCAT track rollers\u003c\/a\u003e · \u003ca href=\"\/collections\/track-roller\" style=\"color:#201f1e;text-decoration:underline\"\u003eAll track rollers\u003c\/a\u003e\u003c\/p\u003e"}]
Models
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Regular price $170.00 EXC. TaxesRegular priceUnit price / per
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Regular price $123.00 EXC. TaxesRegular priceUnit price / per
Replacement parts for the CAT 300.9D, all listed for this machine: track rollers and idler.
Rollers and idlers in our range are built with a heat treated steel casing, sealed shaft and bearings, an oil fill and heavy duty seals. Replacing worn components together keeps wear even across the undercarriage.
See the wider range: CAT track rollers and CAT idlers.
If you cannot find the part you need for your CAT 300.9D, contact the team and we will check availability. Shipped across the USA by Excavator Parts Direct.
Didn't find what you need?
Call our helpful sales team today at