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AT318141 Starter Motor, 12V, 15-Tooth Spline — replacement for Hitachi Zaxis 35U/50U and Yanmar 3TNV88/4TNV88 engines.
Stock status and dispatch window confirmed at time of order.
Stock-Ready Dispatch — Guangzhou warehouse holds this 12V starter motor for immediate release, cutting wait times when your compact excavator sits idle on site.
| Parameter | Value |
|---|---|
| Part Number | AT318141 |
| Product Type | Starter Motor |
| Cross-Reference | AT318141 (reference only) |
| Machine Fitment | Zaxis 35U-2, Zaxis 35U-3, Zaxis 35U-5N, Zaxis 50U-2, Zaxis 50U-3, Zaxis 50U-5N, 3TNV88-BNHB, 3TNV88F, 3TNV88-NHBB, 4TNV88-BNHB, 4TNV88C, 4TNV88-NHBB |
| Voltage | 12 Volts |
| Teeth/Splines | 15 Teeth/Splines |
| Condition | New Aftermarket |
| Warranty | 3–12 month warranty against manufacturing defects |
| Standards | ISO certified manufacturing |
| Failure Symptom | Replacement Urgency |
|---|---|
| Engine cranks slowly or fails to turn over | Immediate — machine is non-operational until replaced |
| Clicking sound from starter solenoid with no engagement | High — solenoid or drive gear failure requires swap |
| Intermittent starting in cold or damp conditions | Elevated — unreliable ignition risks daily site delays |
| Burnt smell or visible heat damage on starter housing | Critical — electrical failure may spread to wiring harness |
A confirmed-dead starter needs a replacement on the shelf, not a quote still being compiled.
When a Hitachi Zaxis 35U or Yanmar-powered compact excavator stops starting, the clock runs against the contractor. Every hour the machine sits silent, a trench stays open or a truck waits unloaded. Yet the typical aftermarket inquiry chain — confirm the part number, check stock at a distant warehouse, wait for a freight quote — burns through days before the 12V Starter Motor AT318141 in stock fast shipping replacement even leaves a loading dock [NEED_CITE: typical lead times for aftermarket compact excavator electrical components]. The starter is a single-point failure component: when it stops working, nothing downstream matters until it is replaced.
Keeping a 12V Starter Motor AT318141 in stock fast shipping replacement ready in Guangzhou means the dispatch conversation starts immediately, not after a week of email exchanges. The unit ships as a single piece — no minimum order threshold blocking an emergency purchase for one downed machine. Whether the failed starter came off a Zaxis 50U-3 on a residential site or a 4TNV88-powered unit in an agricultural yard, the same stocked part covers the fitment range.
The late-night calls we pick up often begin with a blurred photograph of a nameplate. Oil, paint, and weather strip the label off a starter motor long before the unit itself fails. A clear shot of the old starter — showing the mounting flange, terminal posts, and drive gear — lets our technical team verify the 15-tooth spline count and port orientation against your machine model. This step matters because Yanmar 3TNV88 variants across Hitachi Zaxis 35U generations carry subtle differences in connector placement [NEED_CITE: Yanmar 3TNV88 engine variant identification across equipment OEMs]. Sending a machine model alone is sometimes enough; sending a photo alongside it removes the guesswork entirely.
The 12-volt rating matches the standard electrical system on compact excavators and small loaders in the fitment list, drawing high cranking amperage through heavy-gauge cables to spin the flywheel. The 15-tooth drive gear must mesh precisely with the ring gear on the flywheel housing — one tooth difference in count or a mismatched spline profile means the starter spins freely without engaging the engine. New aftermarket condition means the unit arrives with unworn brushes, a fresh solenoid, and bearings that have not absorbed years of heat soak from a previous installation. The ISO-certified manufacturing standard behind the build ensures the internal windings and commutator meet baseline electrical tolerances, not just external dimensions.
A starter that looks right in the listing but arrives with the wrong terminal orientation or spline count does not just delay the repair — it extends the machine's downtime by the full round-trip return cycle. The excavator sits on the bench or in the mud while the incorrect unit travels back and the correct one ships out. On a tight construction schedule, those extra days cascade into missed pour dates, idle crew hours, and penalty clauses [NEED_CITE: downtime cost multipliers for compact excavators on active construction sites]. Verification before dispatch is not a luxury step; it is the difference between a two-day turnaround and a two-week setback.
Our Guangzhou warehouse maintains stock depth on fast-failure electrical items like this starter motor, so availability is a statement of fact rather than a promise to check. One-piece ordering means a small contractor replaces a single failed starter without padding a purchase order. Part identification from a worn nameplate photograph or machine serial plate eliminates the trial-fitment gamble that plagues unverified aftermarket listings. Cross-reference verification covers superseded numbers and alternate references so that a legacy part number still resolves to the correct current unit. Express, air, and sea freight options come with arrival timing quoted before you commit, not revealed after the invoice is paid. A 3–12 month warranty against manufacturing defects backs every unit that leaves the dock.
Send us the part number pulled from your old starter, your exact machine model such as Zaxis 35U-2 or 50U-3, or a photograph of the nameplate and mounting face. We will confirm stock status, verify the 15-tooth spline and terminal layout match your unit, and return a freight quote with an arrival estimate matched to your urgency.
Q: Is this starter motor in stock and when can it ship? A: The AT318141 starter motor is held in our Guangzhou warehouse as a stocked item. Once fitment is confirmed against your machine model, the unit is prepared for dispatch within the current week. Exact ship dates depend on the verification step and your chosen freight method.
Q: What is the minimum order — can I buy just one for an emergency repair? A: Yes. This starter motor ships in single-piece quantities with no minimum order requirement. The policy is designed for emergency breakdowns where one machine is down and waiting on one part, so you are not forced to buy inventory you do not need.
Q: How long does delivery take to my country by express, air, or sea? A: Express courier delivery typically reaches international destinations within a matter of days, while air and sea freight follow longer transit windows. We quote the estimated arrival time for each method before you confirm the order, so you can match the shipping speed to your machine's downtime tolerance.
Q: My starter nameplate is worn off — can I confirm fitment from a photo or machine model alone? A: A photograph of the old starter showing the mounting flange, drive gear, and terminal posts, combined with your machine model, is usually sufficient for our technical team to verify compatibility. This approach avoids the trial-fitment risk that comes from ordering on a part number alone.
Q: What happens if the starter arrives and doesn't fit or doesn't work? A: Every unit carries a 3–12 month warranty against manufacturing defects. If the starter is confirmed correct for your machine but fails to perform or shows a manufacturing fault, the warranty process covers resolution. Fitment verification before shipment is our first line of defense against mismatch issues.
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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