Stop Solenoid 1502-12A2U1B2 – OE Interchange for Woodward 12V

Verified Cross-References — every 1502-12A2U1B2 interchange number is checked against your engine serial before dispatch, not copied from a generic list.

Technical Specifications

Application Suitability

Why the Same Stop Solenoid Number Arrives in Multiple Variants

The base number alone does not guarantee a physical fit — connector position, stroke length, and bracket pattern all vary across production runs.

On a Dubai job site, I watched an excavator sit idle for three days because a Stop Solenoid for Woodward 12V that looked identical on paper had its electrical connector rotated forty-five degrees from the original. The wiring harness would not reach. [NEED_CITE: Woodward stop solenoid variant identification procedures for field service] Cross-reference tables circulated between sellers often carry forward errors from older catalogs, so a number that was correct for one machine generation may not apply to the next. Superseded numbers like 1500-2114 add another layer of confusion when a replacement part has been re-engineered with a different mounting footprint.

Fitment Range and Serial-Range Dependencies

A Stop Solenoid for Woodward 12V carries the same base identifier across several engine families, yet the physical interface changes depending on when the engine left the factory. Early-production units may use a two-pin spade connector while later builds switched to a sealed three-pin plug. Stroke length — the distance the plunger travels to cut fuel — also shifts between variants, and even a small mismatch prevents the fuel rack from reaching full shutdown position.

Connector and Mounting Verification Before You Commit

The mounting hole spacing is held to ±0.05 mm, which means this solenoid drops into a standard Woodward 12V bracket without modification. However, bracket designs themselves differ across OEM installations, so hole pattern confirmation against your existing unit is essential. [NEED_CITE: dimensional verification standards for engine shutdown solenoid replacement] Connector type, pin count, and cable exit direction must all match — a photograph of the old solenoid's label and plug face eliminates most of these variables. When the nameplate is worn or painted over, the machine model combined with the controller serial number usually provides enough information to narrow down the correct variant.

What the Specification Sheet Actually Means in the Field

The IP67 rating means the housing resists dust ingress entirely and tolerates temporary immersion — relevant for machines that undergo pressure washing between shifts or operate in monsoon-exposed regions. Nickel plating at ≥15 μm thickness provides a corrosion barrier for coastal and high-humidity environments where bare steel housings corrode within months. The SAE J1455 vibration test runs the unit through 10–2000 Hz for 500 hours, simulating the sustained shaking an excavator transmits through its engine bay during trenching and hammer work. High-permeability silicon steel in the core reduces eddy current losses, keeping coil temperature lower during the brief energization cycle and extending insulation life.

The Cost of Shipping the Wrong Variant

When a solenoid arrives with the wrong connector orientation, the machine stays down while the correct part ships internationally — a delay measured in days, not hours. A勉强 fitted unit with slightly incorrect stroke length may shut the engine down in normal operation or, worse, fail to shut it down during an emergency. [NEED_CITE: engine overspeed incident reports linked to shutdown system component mismatch] Return freight for misidentified electrical parts often exceeds the part cost itself, and the downtime loss on an excavator sitting idle on a contracted site compounds quickly.

Why Buyers Verify Fitment Through This Channel

Self-produced lines and qualified sourced supply both carry the same warranty terms, so there is no quality gap between what we manufacture and what we source. Eight product categories mean that when a repair job also needs seal kits, filters, or electrical connectors, everything ships under one account. Orders start from a single piece — no minimum quantity blocking an emergency replacement. Part identification works from a number, machine model, photograph, or nameplate image. Cross-reference verification covers superseded and alternate numbers, catching errors that copied tables miss. A sample can be dispatched for physical fitment confirmation before any bulk commitment is made.

Documentation & Verification

• Commercial invoice and packing list referencing 1502-12A2U1B2 and all cross-reference numbers
• Part compatibility sheet confirming connector type and stroke length against your serial number
• Quality inspection record covering dimensional tolerance and IP67 sealing test
• Warranty terms document specifying coverage period and claim procedure
• Packing photographs showing anti-static foam and protective carton before dispatch
• HS code and customs documentation support for electrical shutdown components

Fitment Check Before Installation

• Compare mounting hole spacing on the new solenoid against the old unit's bracket pattern
• Verify connector pin count and orientation match the existing wiring harness plug
• Stroke length should move the fuel rack to full cutoff without binding or excess travel
• Energize briefly to confirm plunger retracts fully before final tightening
• If any dimension or interface does not match, halt installation and contact technical support with photographs

Requesting the Correct Variant for Your Machine

Send the machine model, engine controller serial number, and clear photographs of the existing solenoid label and connector face. This allows the technical team to cross-reference against superseded numbers and confirm which variant fits before any order is processed. For fleet-wide replacements, a single sample can be shipped first for physical fitment testing.

Frequently Asked Questions

Q: How do I confirm this Stop Solenoid for Woodward 12V fits when I only have the machine model? A: The machine model narrows the engine family, and the controller serial number pinpoints the exact variant. If serial data is unavailable, a photograph of the old solenoid's label and connector face provides enough information to verify mounting pattern, stroke length, and plug type against our cross-reference records.

Q: My existing part shows 1500-2114 — is 1502-12A2U1B2 the correct replacement? A: 1500-2114 is listed as a cross-reference (reference only) for this solenoid, but superseded numbers sometimes indicate a design revision with different physical dimensions. We verify the replacement against your specific engine serial number to confirm that connector type, stroke length, and mounting pattern all match before shipping.

Q: Why do different sellers list different numbers for what looks like the same solenoid? A: Cross-reference tables are often copied between sellers without independent verification, carrying forward errors from older catalogs. Production revisions, regional variants, and superseded numbers all contribute to conflicting listings. We check every number against manufacturer data and your machine serial rather than relying on generic interchange charts.

Q: Can I get one sample to test fitment before ordering for the whole fleet? A: Yes. A single sample ships with the same quality inspection record and warranty terms as a bulk order. Physical fitment confirmation on one machine before committing to a fleet-wide purchase eliminates the risk of receiving a batch that does not match your specific variant.

Q: What if the mounting bracket on my machine differs from the standard Woodward 12V pattern? A: Bracket designs vary across OEM installations even within the same engine family. Send a photograph or measurement of the hole spacing and bracket profile. The technical team will confirm whether the standard ±0.05 mm tolerance solenoid fits or whether a different variant is required for your specific bracket configuration.