12V Stop Solenoid 3991167 SA-4941-12 | Direct Fit for Hyundai R130 R170

Verified Cross-Reference — Stop Solenoid 3991167 and SA-4941-12 mapped to Cummins 4BT engine serial ranges in Hyundai R130 and R170 excavators, eliminating variant mismatch before dispatch.

Technical Specifications

Application Suitability

When the Part Number Matches but the Plug Points the Wrong Way

Superseded references and variant differences within the same base Stop Solenoid 3991167 for Hyundai R130 R170 / Cummins 4BT cross reference listings mean physical fitment is never guaranteed by a number alone.

In mining and quarry sites across Southeast Asia, a machine sits idle while the operator discovers the replacement solenoid's connector faces a different direction from the original harness. The part number on the box matches the old unit perfectly, yet the wiring loom falls short by several centimetres. This happens because solenoid variants produced for different engine serial batches carry identical reference numbers but differ in plug orientation, plunger travel, or mounting bolt spacing [NEED_CITE: aftermarket solenoid variant tracking for Cummins B-series engines]. Confirming the exact engine build date and cross-referencing against verified tables removes this risk before the part leaves the warehouse.

Tracing the Number Across Generations

The reference numbers 3991167, SA-4941-12, SA494112, and 3964627 all appear in aftermarket catalogues, yet they do not describe a single identical component. Older service bulletins list 3964627 as the original equipment reference, later superseded by SA-4941-12 and then consolidated under 3991167 in current cross-reference tables. Each transition reflects a design change — sometimes a revised plunger return spring, sometimes a modified coil winding — and not every variant fits every Cummins 4BT production batch. Our verification process maps each number to the applicable engine serial range so the correct Stop Solenoid 3991167 reaches the right machine without field modification.

Connector Orientation and Mounting Interface

The electrical plug position relative to the mounting flange determines whether the existing harness reaches without strain or rerouting. On early-production Hyundai R130 excavators, the solenoid harness exits toward the engine block, while later R170 models route the loom outward. A mismatch forces field splicing, which introduces moisture ingress and vibration fatigue at the splice point [NEED_CITE: electrical connector failure modes in off-highway equipment]. Before confirming fitment, we compare the connector clocking angle, pin configuration, and flange bolt-circle diameter against the buyer's existing unit photograph or serial-specific service data. This step catches the variant difference that a part number alone cannot reveal.

Reading the Voltage and Duty Cycle

A 12V coil rated for continuous duty holds the plunger engaged as long as the ignition circuit remains live, whereas an intermittent-duty coil relies on a pull-hold winding switch to prevent overheating. Specifying the wrong duty cycle causes the solenoid to overheat and fail prematurely, or to drop out during extended idle periods, allowing unintended fuel flow. The Stop Solenoid 3991167 SA-4941-12 supplied here carries a 12V rating verified against the Cummins 4BT fuel-shut-down circuit requirements in Hyundai R-series excavators. Matching duty cycle to the machine's electrical logic prevents repeat failures that operators often misdiagnose as coil defects.

The Hidden Cost of a Near-Miss Fitment

When a solenoid bolts on but the plunger stroke differs by a small margin, the fuel rack does not travel fully to the shut-off position. The engine continues to run after the key is turned off, or the rack hangs partially open during operation, causing rough idle and excess smoke. Technicians then spend hours chasing fuel system faults, replacing injectors and pump seals, before tracing the symptom back to the incorrect solenoid variant [NEED_CITE: diesel engine fuel rack actuation troubleshooting procedures]. The cumulative cost of misdiagnosis, extra parts, and extended downtime exceeds the price difference between a verified unit and a generic catalogue match.

Why Source This Solenoid Through XUNPO

Self-produced and qualified sourced lines carry identical QC and warranty terms, so the Stop Solenoid 3991167 you receive meets the same inspection standard regardless of production origin. Eight product categories under one account allow complete repair consignments — solenoids, seal kits, filters, and gaskets — to ship as a single dispatch from our Guangzhou warehouse. Part identification proceeds from a number, a machine model, or a photograph of the nameplate when the label is worn or painted over. Cross-reference verification covers superseded and alternate numbers including 3964627, ensuring obsolete references are mapped to the current valid replacement. A sample unit ships for physical fitment confirmation before any bulk commitment, and our technical team remains available for connector orientation and duty-cycle queries.

Documentation & Verification

• Commercial invoice listing 3991167 and all cross-reference numbers for customs clearance
• Part compatibility sheet mapping SA-4941-12 to specific Cummins 4BT serial ranges (reference only)
• Dimensional check record covering flange bolt pattern and connector pin layout
• Warranty terms document stating coverage period against manufacturing defects
• Packing photographs showing solenoid condition and protective wrapping before crate closure
• HS code assignment support for accurate duty classification at destination port

Fitment Check Before Installation

• Compare mounting flange bolt-circle diameter and hole count against the removed solenoid
• Verify connector pin count, keyway shape, and clocking angle match the existing harness plug
• Measure plunger protrusion length and confirm it matches the fuel rack engagement requirement
• Energise the new Stop Solenoid 3991167 on the bench to confirm full plunger travel before bolting to engine
• Check return spring tension by hand to ensure the plunger retracts fully when power is removed
• If any dimension diverges, halt installation and contact the supplier with photographs for variant exchange

Tell Us What You See on the Machine

To confirm fitment, provide the Hyundai excavator model designation, the Cummins 4BT engine serial number from the rocker cover plate, and a photograph of the existing solenoid showing the connector and mounting flange. If the nameplate is illegible, a clear image of the old part number stamping and the wiring harness plug allows our team to complete the cross-reference check and verify the correct variant before dispatch.

Frequently Asked Questions

Q: How do I confirm this solenoid fits my specific Hyundai R130 or R170 when I only have the machine model? A: Machine model alone narrows the range but does not eliminate variant differences. Provide the engine serial number stamped on the Cummins 4BT rocker cover, or a photograph of the existing solenoid's connector and flange. We cross-reference these details against our verified tables to confirm the exact Stop Solenoid 3991167 variant your machine requires.

Q: Are 3991167 and SA-4941-12 interchangeable, or do they represent different variants? A: Both numbers appear in cross-reference tables (reference only), yet they may correspond to different plunger stroke lengths or connector orientations depending on the engine serial batch. We verify interchangeability against the specific Cummins 4BT build date and Hyundai R-series production sequence before confirming a match for your machine.

Q: My old solenoid shows part number 3964627 — is that still a valid replacement? A: The reference 3964627 is an earlier production number later superseded in service bulletins. It remains valid as a cross-reference identifier (reference only). We trace the supersession chain to the current equivalent and verify that the replacement unit matches your engine's physical interface and duty-cycle requirement.

Q: I cannot read the nameplate and only know it is a Cummins 4BT — how do we narrow down the right solenoid? A: Send a photograph of the old solenoid from two angles: one showing the connector and one showing the mounting flange. Combined with the machine model, these images allow us to identify the variant, confirm the cross-reference, and ship the correct Stop Solenoid 3991167 SA-4941-12 without guesswork.

Q: Can I order one sample to test fitment before committing to a larger quantity? A: Yes. A single sample unit ships for physical installation verification on your machine. Once fitment, connector orientation, and plunger stroke are confirmed, bulk orders proceed against the verified specification with consistent lead times from our Guangzhou warehouse.