Stop Solenoid 3991167 Replacement for Hyundai R130 OE Interchange

Cross-Reference Verified — Each 3991167 stop solenoid ships with a compatibility sheet matching Hyundai R130 and R170 serial ranges to the correct Cummins 4BT variant.

Technical Specifications

Application Suitability

Why the Same Part Number Ships in Multiple Variants

The base identifier covers several production runs with different connector orientations and mounting flanges.

A stop solenoid for Hyundai R130 R170 cross reference fitment often fails not because the number is wrong, but because the variant is wrong. In Chilean mining sites, I have handed a technician a solenoid carrying the exact number from their work order, only to find the electrical plug rotated 90 degrees from the harness socket. The machine sat idle while we sourced the correct orientation variant. Cross-reference tables copied between sellers frequently merge distinct variants under a single line, masking differences in plug direction, coil winding, or plunger travel that determine whether the part physically connects [NEED_CITE: aftermarket cross-reference accuracy in construction equipment parts catalogs].

Fitment Range and Serial Range Verification

Matching a stop solenoid for Hyundai R130 R170 cross reference fitment requires more than the machine model plate. The Cummins 4BT engine family spans several serial breaks where Hyundai changed the wiring harness connector style and the solenoid mounting bracket geometry. We verify the engine serial number against known build records to isolate which physical variant left the factory on your specific unit. This step eliminates the most common cause of fitment rejection on arrival.

Connector, Plunger, and Mounting Interface Checkpoints

Before confirming an order, three physical interfaces need alignment. The electrical connector must match the harness plug in pin count, keyway position, and locking tab orientation — a mismatch here means the solenoid cannot receive the shutdown signal. The plunger stroke length must correspond to the fuel rack lever throw on your Cummins 4BT build; too short and the engine will not shut down, too long and the plunger binds. The mounting bolt pattern and flange thickness determine whether the solenoid seats flush against the injection pump body [NEED_CITE: diesel engine fuel shutoff solenoid mounting interface specifications].

Specification Interpretation for Field Reliability

The 12V rating defines the coil winding resistance and current draw, which must align with the machine's electrical control circuit. Installing a 24V variant on a 12V system results in insufficient magnetic force to pull the plunger fully, leaving the fuel rack partially open and the engine unable to shut down cleanly. The new aftermarket condition means the coil insulation and plunger seal are unused, eliminating the degraded winding resistance that causes intermittent operation in reclaimed units. ISO-aligned manufacturing governs dimensional tolerances on the plunger bore and mounting flange, which directly affect whether the solenoid seats without shimming. These specifications collectively determine whether the unit performs its single critical function — cutting fuel supply on command — every time the key is turned off.

The Hidden Cost of a Near-Miss Fitment

A solenoid that bolts on but has the wrong plunger stroke will not shut the engine down, forcing the operator to use the manual kill lever and bypassing the electrical safety circuit entirely. A connector that requires an adapter harness introduces a failure point in the shutdown loop, and vibration at the adapter connection can cause intermittent signal loss during operation. Each of these outcomes means the machine returns to the workshop within weeks, not because the part wore out, but because it never matched the system it was installed into [NEED_CITE: diesel engine shutdown system reliability requirements for mobile equipment].

Why Source This Stop Solenoid Here

Our own production lines and qualified sourced supply operate under one account and one warranty, so you receive consistent QC regardless of which facility built your specific batch. Eight product categories mean the solenoid ships alongside the fuel filters, gaskets, and seal kits your repair list requires, consolidated into a single consignment. Minimum order starts at one piece, so a single emergency replacement is never blocked by quantity thresholds. The Guangzhou warehouse stocks common configurations for fast dispatch. Part identification works from a number, a machine model, a photograph of the nameplate, or an image of the old solenoid — whichever is legible on your site. Cross-reference verification covers superseded numbers like 3964627 and alternate references such as SA494112, confirming which are interchangeable and which represent distinct variants. A sample unit can ship before bulk commitment, allowing your workshop to confirm fitment on the actual machine before the full order is released.

Documentation & Verification

• Commercial invoice and packing list with part number 3991167 SA-4941-12 and declared HS code
• Compatibility sheet mapping your machine serial range to the correct connector variant (reference only)
• Dimensional inspection record covering plunger stroke, bolt pattern, and flange thickness
• Warranty terms stating coverage period and manufacturing defect claim procedure
• Packing photographs showing the solenoid and connector condition before crate closure
• Customs documentation support with accurate tariff classification for destination country clearance

Fitment Check Before Installation

• Compare the new solenoid's connector keyway and pin layout against the existing harness plug before wiring
• Measure plunger stroke against the fuel rack lever throw on the Cummins 4BT injection pump
• Verify mounting bolt spacing and flange thickness against the old unit or the pump body bolt holes
• Confirm 12V coil resistance with a multimeter to rule out shipping damage before installation
• Perform a bench energize test to verify plunger travel and return spring function prior to fitting
• If any interface mismatches, halt installation and send photographs for variant re-identification

Request a Fitment Verification

Send the machine model, engine serial number from the Cummins 4BT nameplate, and a photograph of the existing solenoid connector. If the nameplate is worn or painted over, a photo of the injection pump mounting face and the harness plug is sufficient. We return a confirmed variant match with cross-reference details before you commit to an order quantity.

Frequently Asked Questions

Q: How do I confirm this stop solenoid fits my Hyundai excavator? A: Provide the machine model and the engine serial number from the Cummins 4BT nameplate. We cross-check the serial range against known connector and mounting variants for Hyundai R130 and R170 production runs, then confirm which physical configuration matches your unit before shipping.

Q: Is the old number 3964627 still usable and interchangeable with 3991167? A: In many applications, 3964627 is a superseded reference that maps to 3991167, but not across all serial ranges. Some production batches changed the connector style when the number was updated. Send your engine serial so we can confirm whether direct interchange applies to your specific machine.

Q: Why are there different variants under SA-4941-12 and SA494112? A: These references may represent the same base solenoid with differences in connector orientation or plunger stroke across Cummins 4BT engine builds. The dash-formatted and concatenated versions are not always identical in physical configuration. Verification against your engine serial resolves which variant is correct.

Q: I only have the machine model, no readable part number — can you identify the correct solenoid? A: Yes. Send the machine model along with photographs of the existing solenoid, the connector, and the engine nameplate. Even if the part number is worn away, the mounting flange geometry and connector type visible in photos are usually sufficient to identify the correct variant.

Q: Can I order one sample to test fitment before placing a bulk order? A: A single sample ships under the same warranty terms as a production order. Install it on one machine, confirm the connector mates correctly, the plunger stroke matches, and the shutdown function operates as expected, then approve the remaining quantity for dispatch.