Stop Solenoid 3930658 3932529 SA-4756-12 – Cross-Reference for Cummins 4BT 6BT

Verified Cross-Reference — Each stop solenoid order ships with a confirmed cross-reference sheet covering superseded Cummins numbers and terminal configurations for 4BT and 6BT variants.

Technical Specifications

Application Suitability

When the Part Number on the Solenoid No Longer Matches the Manual

Cross-reference tables copied between sellers often carry errors forward — a wrong number leaves the machine stranded in the field.

Superseded part numbers across Cummins engine generations mean the number stamped on your old stop solenoid may not map cleanly to current production. A mechanic pulls a solenoid marked 3932529 from a 6BT, orders the same number, and receives a unit with a different connector pin layout. The machine sits while the correct stop solenoid for Cummins 4BT 6BT cross reference is identified and shipped. I have seen this exact scenario cost a desert site three days of production because the replacement arrived with the wrong terminal configuration. [NEED_CITE: Cummins engine part number supersession documentation practices]

Identifying the Correct Variant from Engine Serial Alone

When the nameplate is worn or painted over, the machine model becomes the only starting point. Cummins 4BT and 6BT engines span multiple production generations, each with subtle differences in solenoid mounting depth and electrical connector type. Our technical team confirms the exact engine serial range against the solenoid variant, ensuring the stop solenoid for Cummins 4BT 6BT cross reference matches the physical and electrical interface on your machine. This verification happens before the unit leaves the warehouse, not after it arrives on site.

Connector and Mounting Pattern Verification

The physical interface is where most cross-reference errors surface. SA-4756-12 and SA-4891-12 share similar electrical characteristics but differ in terminal pin arrangement and mounting flange geometry. We check port position, connector type, and bolt pattern spacing against your specific engine build. A solenoid that bolts on but has reversed pin assignments will not communicate correctly with the engine shutdown module. [NEED_CITE: electrical connector standardization in mobile diesel engine shutdown systems]

Reading the Specifications That Matter

Voltage tolerance determines whether the solenoid holds reliably under the charging system's output range. A 12V stop solenoid for Cummins 4BT 6BT cross reference must sustain coil engagement without overheating during extended cranking sequences. The hardened steel plunger assembly resists deformation under sustained cycle duty, preventing the gradual loss of stroke that causes intermittent shutdown failures. High-temperature seals around the plunger bore maintain integrity in engine bay conditions where ambient heat and radiant exhaust temperatures combine. These material choices directly affect service interval and failure mode.

The Cost of Installing the Wrong Variant

A stop solenoid that fits physically but carries the wrong internal specification creates two distinct failure paths. The first is immediate: the engine fails to shut down when commanded, posing a safety risk during emergency stops. The second is delayed: marginal voltage tolerance causes the coil to overheat gradually, leading to intermittent operation that is difficult to diagnose. Both outcomes result in unplanned downtime and repeat labor costs. [NEED_CITE: diesel engine overspeed protection system reliability standards]

What Makes This Source Different for Fitment Accuracy

Our own production lines and qualified sourced supply operate under one account and one warranty, so every stop solenoid for Cummins 4BT 6BT cross reference carries the same QC terms regardless of origin. Eight product categories mean associated gaskets, wiring harnesses, and mounting hardware ship as one consignment. We accept orders from one piece, removing minimum order barriers for emergency replacements. Guangzhou warehouse stock enables fast dispatch on common variants. Part identification works from number, machine model, photograph, or nameplate image. Cross-reference verification covers superseded and alternate numbers. Sample supply allows fitment confirmation before bulk commitment.

Documentation & Verification

• Commercial invoice and packing list with part variant clearly marked for customs clearance
• Compatibility and cross-reference sheet listing verified superseded numbers as reference only
• Dimensional and electrical inspection record confirming voltage response and plunger stroke
• Warranty terms specifying coverage period and manufacturing defect scope
• Packing photographs showing solenoid condition and connector protection before sealing
• HS code and customs documentation support for international engine parts shipments

Fitment Check Before Installation

• Compare terminal pin count and layout on the new stop solenoid against the removed unit before connecting the harness.
• Measure mounting bolt pattern spacing to confirm flange geometry matches the engine block pad.
• Apply 12V test voltage to verify plunger stroke and retraction before final installation.
• If connector type differs, confirm adapter harness availability before proceeding with fitment.
• Return the unit for exchange if any physical dimension or electrical response deviates from specification.

Requesting Fitment Confirmation

Provide your Cummins engine model, serial number, and a photograph of the existing solenoid connector and mounting area. If the nameplate is unreadable, a clear image of the engine block casting number allows our team to trace the correct variant. We return a confirmed cross-reference match with variant details before you commit to order quantity.

Frequently Asked Questions

Q: How do I confirm this solenoid fits my specific Cummins 4BT or 6BT variant? A: Share the engine serial number or a photograph of the existing unit's connector and mounting flange. Our team cross-references the serial range against production records to identify the correct variant, including any superseded numbers that apply to your build. This verification ensures the stop solenoid for Cummins 4BT 6BT cross reference matches both physical and electrical interfaces.

Q: My old part number is 3932529 — is it still valid or superseded? A: Number 3932529 appears in older Cummins documentation and may have been superseded by SA-4756-12 or SA-4891-12 depending on your engine generation. We verify the current equivalent against your specific engine serial range, confirming terminal configuration and mounting compatibility before shipment. The cross-reference sheet included with your order documents this verification as reference only.

Q: What is the difference between SA-4756-12 and SA-4891-12? A: Both are 12V stop solenoids for Cummins applications, but they differ in connector pin arrangement and mounting flange geometry. SA-4756-12 typically serves earlier 4BT and 6BT builds, while SA-4891-12 appears in later production. Providing your engine serial number allows us to confirm which variant your machine requires.

Q: I only have the engine model, no readable part number — can you identify the correct solenoid? A: Yes. A photograph of the solenoid mounting area and electrical connector, combined with the engine model, gives our team enough information to trace the correct variant. Cummins casting numbers on the engine block provide additional identification when the nameplate is worn or painted over.

Q: Can I order a sample to verify fitment before placing a larger order? A: Sample supply is available for fitment confirmation before bulk commitment. You receive one unit to test physical fit, connector compatibility, and electrical response on your machine. Once confirmed, the bulk order ships with identical specifications and full warranty coverage.