Thermostat 6680512 for Kubota D902, D1105 & Bobcat 743, new aftermarket cooling component with 3–12 month warranty covering engine temperature regulation.
Cross-references: 6674172, 6653948, 3918235.
Stock status confirmed in real time so your downed machine ships same week.
Ready from Guangzhou — Thermostat 6680512 sits on our warehouse shelf right now, boxed and labeled, so your downed Kubota or Bobcat engine does not sit idle waiting for a part to be sourced from another continent.
| Parameter | Value |
|---|---|
| Part Number | 6680512 |
| Product Type | Thermostat |
| Cross-Reference | 6674172, 6653948, 3918235 (reference only) |
| Machine Fitment | Kubota D902, D1105, D1105T, D1305, D1402, V1505, V1703 Tier I, V1902, V2003T Tier I, V2203 Tier I; Bobcat 553, 643, 645, 743, 751, 753, 7753, 763, 773, 1600, S150, S160, S175, S185, T190, 337, 341, 425, 428, E25, E26, E27, E27Z, L23, L28, 5600 |
| Condition | New Aftermarket |
| Warranty | 3-12 Month |
| Manufacturing Standard | ISO-certified manufacturing partners |
| Failure Symptom | Replacement Urgency |
|---|---|
| Engine coolant temperature climbing past normal operating range | Immediate — continued operation risks head gasket failure or warped cylinder head |
| Engine running below optimal temperature, excessive fuel consumption, poor combustion | Schedule within next service window — long-term efficiency loss and carbon buildup |
| Thermostat stuck closed, coolant boiling off or overflowing recovery tank | Immediate — machine must be shut down until Thermostat 6680512 is installed |
| Coolant temperature fluctuating erratically during load changes | Schedule within next service window — indicates wax element degradation |
The thermostat ships the same week you confirm the order, because waiting days to verify a superseded part number is downtime you cannot afford.
A Bobcat 753 sitting in a job-site yard with an overheating Kubota D1105 engine costs more every hour it is not running than the freight bill to put a Thermostat 6680512 in the operator's hands. Repair shops report that identifying the correct cooling system component from a faded or painted-over nameplate often takes longer than the physical swap itself [NEED_CITE: equipment downtime cost estimation methodology for compact loaders]. When the machine is already hot and the crew is standing by, every day spent cross-referencing numbers across different supplier catalogs is a day the machine is not earning.
This Thermostat 6680512 in stock fast shipping replacement component is picked from our Guangzhou warehouse shelf, not ordered from a remote supplier after you pay. When a site supervisor sends a photograph of a worn nameplate or a shot of the old thermostat pulled from the housing, our technical team matches it to the correct Kubota or Bobcat engine variant within hours. You get a confirmed part number and a dispatch date before you commit to the order.
Express courier delivers this thermostat to most international workshops within a few business days. Air freight suits repair centres consolidating several cooling system components into one shipment. Sea freight is available for stocking distributors ordering in larger quantities. Each option is quoted with a realistic transit window at the point of order, so you know the arrival date before the invoice is issued. Thermostat 6680512 in stock fast shipping replacement availability means your freight choice is driven by budget, not desperation.
The thermostat opens at a calibrated temperature to allow coolant flow into the radiator. When the wax pellet inside loses responsiveness, the engine either overcools at startup or overheats under load — both conditions accelerate wear on piston rings and cylinder liners [NEED_CITE: diesel engine thermal management and component wear correlation]. This unit is manufactured to match the original opening temperature and flow passage for the Kubota D-series and V-series engines listed above, ensuring the cooling system reaches and maintains the designed operating band. The housing flange and gasket surface match the factory dimensions so the unit seats correctly without modification.
A thermostat that opens too late allows coolant to boil locally in the cylinder head, potentially warping the head or blowing the gasket — repairs that turn a simple swap into a multi-day teardown. A thermostat that opens too early prevents the engine from reaching efficient operating temperature, increasing fuel consumption and soot accumulation over hundreds of operating hours. Either mistake means the machine goes back down while you wait for a second shipment. Thermostat 6680512 in stock fast shipping replacement orders are verified against your machine model before dispatch to prevent these avoidable failures.
Our Guangzhou warehouse holds this cooling component ready for single-piece dispatch, so a one-machine emergency does not require meeting a minimum order quantity. Part identification works from a part number, a machine model, a photograph of the old unit, or a nameplate image — whichever is readable on your end. Cross-reference verification covers superseded numbers including 6674172, 6653948, and 3918235 (reference only), reducing the risk of ordering an obsolete variant. The same account and warranty cover both self-produced and sourced lines, so you deal with one supplier regardless of which facility the part ships from [NEED_CITE: ISO-certified manufacturing quality assurance framework]. Technical staff remain available to confirm engine variant compatibility before you place the order.
Send us the part number if the old thermostat is legible. If the number is gone, a clear photo of the unit out of the housing is enough for our team to confirm compatibility. When even the thermostat is too corroded to identify, a shot of the engine nameplate — or simply the machine model — lets us cross-reference against the Kubota and Bobcat engine variants this unit fits. You receive stock confirmation, a freight quote, and an expected arrival date before any commitment is made. Thermostat 6680512 in stock fast shipping replacement inquiries are handled with speed because the machine is already down.
Q: Is Thermostat 6680512 in stock right now and when can it ship? A: This thermostat is held in our Guangzhou warehouse and is available for immediate dispatch. Single-piece orders ship within the same week of confirmation. Express courier, air freight, and sea freight options are all available, with transit windows quoted at the time you place the order so you know the expected arrival date before paying.
Q: Can I order just one piece for an emergency repair? A: Yes. The minimum order quantity is one piece. There is no forced bulk requirement when a single machine needs a single thermostat to get back to work. This policy exists specifically for situations where a Kubota or Bobcat engine is already overheating on a job site and cannot wait for a larger order to be assembled.
Q: My nameplate is worn or painted over — how do I confirm the right thermostat? A: Send a photograph of the old thermostat once it is removed from the housing, or a photo of the engine block casting and any visible identification marks. Our technical team cross-references the image against known Kubota D-series and V-series engine variants to confirm the correct unit, typically within a few hours of receiving the image.
Q: How many days until it arrives at my workshop? A: Express courier delivery takes a short number of business days to most international destinations. Air freight takes somewhat longer but suits consolidated shipments. Sea freight is the longest option and is recommended only for stocking orders rather than emergency repairs. Exact timing depends on your location and is quoted before you confirm the order.
Q: What happens if the thermostat I receive does not fit? A: We verify compatibility against your machine model or photograph before dispatch to prevent mismatches. If a fitment issue arises despite this check, our technical team works to identify the cause and resolve it, including arranging a replacement unit if the error is on our side. The 3 to 12 month warranty covers manufacturing defects.
Not sure if this part fits your machine? Send us your machine model number and serial number via WhatsApp or email -- our specialists will verify compatibility within 2 hours.
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