12V Stop Solenoid 3991167 SA-4941-12 | Cross-Reference for Hyundai R130 R170

Verified Cross-Reference Fitment — Every 3991167 unit ships with confirmed pinout and mounting layout for Hyundai R130 and R170 with Cummins 4BT engine.

Technical Specifications

Application Suitability

Why the Same Part Number Ships in Four Variants Across 4BT Production Runs

A single 12V Stop Solenoid for Hyundai R130 R170 / cross reference fitment search can return multiple variants that look identical but differ in connector pinout or flange offset.

When Cummins transitioned through 4BT production generations, the stop solenoid base design stayed similar while connector types, coil winding direction, and mounting hole spacing shifted. Cross-reference tables copied between sellers frequently carry forward errors from earlier catalog versions, listing 3991167 alongside SA-4941-12 and 3964627 as universally interchangeable. In practice, some variants reverse the plug polarity, and others shift the mounting bolt circle by a few millimeters. [NEED_CITE: Cummins 4BT engine serial number variant identification for fuel system components]

I once supplied a batch of stop solenoids for a Hyundai R130 running a 4BT, ordered against an online cross-reference listing. The solenoids matched the housing dimensions perfectly but the connector pinout was reversed — the machine cranked but the solenoid never retracted, leaving the fuel rack open. The site lost several days diagnosing what looked like an electrical harness fault. That failure traced directly to trusting a table that listed all four reference numbers as equivalent without noting the polarity variant. [NEED_CITE: aftermarket cross-reference accuracy standards for engine electrical components]

Fitment Verification Across Hyundai R130 and R170 Serial Ranges

The 12V Stop Solenoid for Hyundai R130 R170 / cross reference fitment requires checking more than the base model designation. Hyundai produced both models across several build years with different Cummins 4BT sub-variants, and the solenoid mounting bracket and connector changed between early and late production runs. Providing the engine serial number or the nameplate from the existing solenoid allows variant-level confirmation rather than relying on the machine model alone.

Connector Polarity, Mounting Pattern, and Dimensional Tolerance

Before installing any replacement stop solenoid, compare the connector key position and pin assignment against the removed unit. The flange mounting holes on this part hold to ±0.05 mm tolerance, meaning a solenoid with shifted hole positions will bind on installation rather than seat flush. Check the plunger travel and tip profile against the original — a mismatch here prevents the fuel rack from reaching full shutoff, which can cause the engine to run on after the key is turned off. [NEED_CITE: diesel engine fuel rack stop solenoid installation clearance requirements]

Reading the Specifications for Field Compatibility

The IP67 sealing rating means the solenoid body and connector interface resist water ingress during pressure washing and rain exposure on urban excavation sites and quarry operations. Class H insulation rated to 180°C keeps the coil intact through the elevated under-hood temperatures that Cummins 4BT installations generate, especially in port material handling where machines idle between load cycles. The stainless steel plunger with a hardened tip resists corrosion from condensation and fuel vapor while maintaining the precise tip geometry needed for positive fuel rack engagement across the full -20°C to +85°C operating range.

What a Mismatched Solenoid Costs Beyond the Part Price

When a stop solenoid with the wrong connector polarity reaches a job site, the immediate symptom is a machine that starts but will not shut down from the cab. Technicians then trace what appears to be a wiring or relay fault, sometimes pulling harness connectors and testing circuits that were never at fault. If a solenoid with incorrect plunger geometry is forced into place, it may appear to work initially but fail to fully retract the fuel rack, leading to incomplete shutdown events or the engine racing on uncommanded. Each of these outcomes multiplies the machine downtime well beyond a simple swap. [NEED_CITE: construction equipment unplanned downtime cost from misidentified replacement parts]

Why Procurement Runs Through One Account Here

XUNPO produces selected solenoid lines in its own Guangzhou facility and sources the remainder from ISO 9001-certified manufacturing partners, so both carry identical QC and warranty terms. Cross-reference verification for 3991167, SA-4941-12, SA494112, and 3964627 is done before the order is confirmed, not after the part arrives wrong. Identification from a worn part number, a machine model, or a photograph of the existing unit and its connector covers situations where the nameplate is painted over or missing. A sample unit ships first when a buyer needs physical fitment confirmation before committing to volume. The technical team confirms connector pinout, flange pattern, and superseded number compatibility directly with each inquiry.

Documentation & Verification

• Commercial invoice lists 3991167 alongside cross-reference numbers SA-4941-12 and 3964627 marked as reference only
• Part compatibility sheet confirms Hyundai R130/R170 fitment against specific engine serial ranges
• Dimensional check report covers flange bolt circle, plunger length, and connector keyway before dispatch
• Quality inspection record includes coil resistance test and insulation breakdown voltage
• Packing photographs show each unit sealed and labeled before crate closure
• HS code and customs classification provided for destination-country import clearance

Fitment Check Before Installation

• Compare connector key position and pin count on the new 3991167 solenoid against the removed unit before connecting any wiring
• Verify flange mounting hole spacing against the existing bracket using the ±0.05 mm tolerance as the acceptance threshold
• Extend and retract the plunger by hand to confirm smooth travel and check that the hardened tip matches the original profile
• Apply 12V briefly to the new solenoid disconnected from the fuel rack to confirm pull-in direction and audible click
• If any dimension or connector detail does not match, halt installation and provide photographs of both units for cross-reference re-verification

Inquiry Details for Fitment Confirmation

Provide the machine model, engine serial number if available, and photographs of the existing solenoid showing the connector face and mounting flange. If the nameplate is unreadable, a photo of the part in hand next to a ruler and a close-up of the connector allows the technical team to complete the variant identification and cross-reference check before shipping.

Frequently Asked Questions

Q: How do I confirm this solenoid fits my specific Hyundai R130 or R170 variant? A: Provide the machine model and, ideally, the Cummins 4BT engine serial number from the block stamping. If the nameplate on the old solenoid is still legible, a photo of it alongside the connector face lets us match against the correct variant within the 3991167 family and confirm pinout before dispatch.

Q: Are older superseded numbers like 3964627 still compatible with current production? A: The superseded number 3964627 is listed as a cross-reference only and may correspond to an earlier connector style or coil specification. We verify each superseded reference against the actual machine serial range rather than assuming blanket interchangeability, so the unit you receive matches the harness and bracket already on your machine.

Q: Why does the same solenoid appear under multiple reference numbers? A: Cummins and equipment manufacturers assigned different numbers to functionally similar solenoids across 4BT production runs, sometimes reflecting connector changes, coil winding direction, or mounting bracket revisions. Our cross-reference verification maps these numbers to their specific variant attributes rather than treating them as universal equivalents.

Q: What if only the machine model is known and the nameplate is unreadable? A: Send a photograph of the existing solenoid showing the connector type, mounting flange shape, and overall dimensions. The technical team uses these physical details along with the Hyundai R130 or R170 model designation to identify the correct variant from the 3991167, SA-4941-12, and SA494112 references.

Q: Can a sample ship first for fitment confirmation before placing a bulk order? A: Yes. A single unit ships as a sample so your workshop can physically trial the connector fit, flange alignment, and plunger engagement on one machine before the remainder of the order is released. This eliminates the risk of an entire batch arriving with a variant mismatch.