Emergency Replacement Water Pump Thermostat Kit – Fits Kubota D1005
16251-73032 Water Pump & Thermostat Kit, Fits Kubota D1005, D1105, D1305 Engines...
Thermostat 6680512 for Kubota D1105 & Bobcat 753, 82°C Opening, Brass Housing — compatible with Kubota D902 through V2203 Tier I and Bobcat 463 to Toolcat 5600 models.
Cross-reference interchange: 6674172, 6653948, 3918235. Arrival timeline confirmed at quote.
Same-Day Dispatch — Guangzhou warehouse holds Thermostat 6680512 stock ready for immediate shipment when your Kubota or Bobcat engine overheats on site.
| 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 463, 553, 643, 645, 743, 751, 753, 763, 773, 7753, S150, S160, S175, S185, T190, 337, 341, 425, 428, E25, E26, E27, E27Z, L23, L28, Toolcat 5600 |
| Opening Temperature | 82°C (±2°C tolerance) |
| Housing Material | Brass |
| Thermal Element | Wax-filled, JIS B 8201 compliant |
| Pressure Rating | 1.2 bar |
| Dimensional Tolerance | ±0.1 mm |
| Spring Material | Nickel-plated |
| Condition | New Aftermarket |
| Standards | ISO 9001, JIS B 8201 |
| Warranty | 3–12 months against manufacturing defects |
| MOQ | 1 piece |
| Failure Symptom | Replacement Urgency |
|---|---|
| Engine coolant temperature gauge climbing into red zone during continuous operation | Immediate — machine must be shut down to prevent cylinder head warping |
| Intermittent overheating under load that clears at idle, pointing to a thermostat stuck partially closed | Same-shift replacement before the next work cycle begins |
| Coolant boiling over at the expansion tank on Kubota D1105 or Bobcat 753 units working extended hours | Urgent — ongoing overheating accelerates gasket and seal degradation |
| Heater output dropping noticeably in cold-weather municipal fleet operations | Scheduled within one service day to restore cabin comfort and prevent freeze damage |
| Thermal cycling fatigue after thousands of open-close events in quarry or demolition duty | Planned swap at next fluid service to avoid surprise failure |
A confirmed Thermostat 6680512 replacement fast shipping order leaves our Guangzhou warehouse the same day payment clears.
When a skid steer loader or compact excavator sits idle on a demolition site, every hour of downtime carries a cost that compounds quickly — idle crew, missed deadlines, rental penalties. The bottleneck is rarely the part itself; it is the delay in confirming whether the number on the worn nameplate still cross-references correctly, or a supplier demanding a minimum order quantity that makes no sense for a single emergency repair. [NEED_CITE: equipment downtime cost impact on small contractors]
I once watched a Bobcat 753 sit silent on a residential foundation job for three full days because the only available thermostat source required a bulk order minimum. The crew was already on site, the concrete truck was scheduled, and a small brass component held everything hostage. That kind of avoidable stoppage is what stocking and single-piece dispatch are designed to eliminate.
Send a photograph of the old thermostat, the engine data plate, or even just the machine model and serial number — our technical team confirms whether Thermostat 6680512 in stock matches your specific engine build before you commit to the order. Kubota engine variants within the D1105 family can differ by production year and emission tier, and a wrong thermostat choice means another delay. We verify the cross-reference against superseded numbers including 6674172 and 6653948 so the correct part ships the first time.
Express couriers such as DHL, FedEx, or UPS typically deliver within a few business days to most international destinations once the parcel leaves Guangzhou. Air freight suits slightly larger consolidated orders where arrival within roughly a week is acceptable, while ocean freight applies to planned restocking where lead time is measured in weeks rather than days. [NEED_CITE: international express freight transit time variables for small parcels] We quote arrival windows at the point of order confirmation so you can plan the repair slot around the delivery, not the other way around. Packaging is built to survive courier handling — the brass housing and wax element need protection from impact deformation that could shift the opening temperature.
The 82°C opening temperature (±2°C) is calibrated to match the thermal management design of Kubota D-series and V-series engines operating under load in construction environments. A thermostat that opens too early prevents the engine from reaching efficient operating temperature, increasing fuel consumption and cylinder bore wear; one that opens too late pushes coolant temperatures toward the boiling point under sustained heavy work. The brass housing resists corrosion from ethylene glycol coolant mixtures and maintains dimensional stability across thousands of thermal cycles, while the nickel-plated spring retains its calibration force without degradation from coolant chemistry. The wax-filled thermal element, compliant with JIS B 8201, provides a predictable expansion curve that translates directly into valve lift and flow area. Dimensional tolerance held to ±0.1 mm ensures the thermostat seats correctly in the housing without bypass leakage that would undermine temperature regulation.
A thermostat that fits the housing but opens at the wrong temperature does not trigger an immediate fault code — it quietly allows the engine to run hotter or cooler than designed, accelerating wear on head gaskets, oil seals, and piston rings over weeks of operation. By the time symptoms surface, the machine has already accumulated damage that a correct Thermostat 6680512 replacement would have prevented. On a compact excavator working in a quarry running extended shifts, a marginally incorrect thermostat can mean the difference between finishing a job and pulling the machine off-line mid-shift for an unplanned teardown. [NEED_CITE: engine overheating damage progression in compact diesel equipment]
Our Guangzhou warehouse stocks Thermostat 6680512 in stock for Kubota and Bobcat fitments, ready for single-piece dispatch without order minimums that block emergency repairs. Self-produced lines and qualified sourced supply carry identical QC and warranty terms, so you receive consistent quality regardless of which production run your unit comes from. Part identification works from a part number, a machine model, a photograph of the component, or a nameplate image — whichever starting point you have available on site. Cross-reference verification covers superseded and alternate numbers so that older machine generations remain serviceable. A technical team is available to confirm compatibility and opening temperature grade before shipment.
Provide the part number from your old thermostat, the Kubota or Bobcat machine model, or a clear photograph of the engine nameplate and we will verify compatibility and confirm dispatch timing within the same inquiry. No minimum order quantity stands between your machine and getting back to work.
Q: Is Thermostat 6680512 in stock right now and how fast can it ship? A: We hold Thermostat 6680512 stock in our Guangzhou warehouse for Kubota D-series and Bobcat compact equipment fitments. Once payment clears and fitment is confirmed, same-day dispatch is available via express courier. Transit time depends on destination and service tier selected, and we quote the expected arrival window at the time of order confirmation so you can schedule the repair accordingly.
Q: Can I order just one thermostat or is there a minimum quantity? A: The minimum order is one piece. This Thermostat 6680512 replacement fast shipping option is designed for emergency repairs where a single machine is down and waiting. There is no requirement to bundle multiple units or reach a spending threshold before your order ships from our warehouse.
Q: What if my engine nameplate is worn and I cannot read the part number? A: Send a photograph of the old thermostat itself, the engine block casting, or the machine model badge. Our technical team cross-references the visual details against known fitments for Kubota and Bobcat engines to confirm whether 6680512 is the correct match before you place the order. This avoids the cost and delay of receiving a part that does not fit.
Q: How long do express, air, and ocean freight each take to arrive? A: Express couriers typically reach international destinations within several business days after dispatch. Air freight generally arrives within roughly one to two weeks depending on routing and customs clearance speed. Ocean freight is suited to planned orders where lead times of multiple weeks are acceptable. We provide estimated arrival dates for each option when quoting your order.
Q: What happens if the thermostat arrives and does not fit my engine? A: If the part does not match the confirmed fitment despite our verification process, we arrange a replacement shipment at no additional parts cost. The warranty covers manufacturing defects for 3–12 months, and our team works with you to identify the correct part number for your specific engine build and serial range.
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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