12V Fuel Stop Solenoid Valve for Thermo King TK486 – Verified Fitment

Verified Cross-Reference — dimensional match and connector orientation confirmed for each Thermo King variant before dispatch.

Technical Specifications

Application Suitability

Why the Same Reference Number Ships in Multiple Variants

The correct 12V Fuel Stop Solenoid Valve for Thermo King TK486 depends on your unit's specific build revision, not just the base number.

Multiple reference numbers—41-9100, 42-0100, 41-4306, 41-7886, 42-1700—appear across Thermo King documentation for what seems like the same solenoid. In practice, these numbers track production revisions, connector configurations, and mounting variations that differ between unit generations. A solenoid that bolts on correctly but has the wrong connector pin depth will not energize. One with the correct electrical interface but incorrect plunger stroke will fail to shut off fuel flow completely. I have seen units sit idle for days because the replacement physically fit but functionally failed [NEED_CITE: transport refrigeration unit solenoid variant identification procedures].

Machine Model Coverage and Serial Range Variants

This 12V Fuel Stop Solenoid Valve for Thermo King TK486 also covers TK249 through TK486V, plus SLXi, TriPac APU, Precedent, and SENTRY II transport refrigeration units. Within each model family, variant differences exist. The TK486E and TK486V, for instance, may require different connector configurations despite sharing the same base platform. Providing your unit serial number allows precise cross-reference verification against the applicable build revision.

Connector Type, Pin Depth, and Mounting Pattern Verification

The electrical connector pin depth tolerance is held to ±0.03 mm, and the mounting hole spacing tolerance to ±0.1 mm. These dimensions must match your existing solenoid's interface exactly. A mismatch in pin depth prevents reliable electrical contact under vibration. Incorrect mounting hole spacing forces modification that compromises the sealing surface. Before dispatch, we verify port position, connector type, and plunger stroke against the specifications for your specific unit build [NEED_CITE: Thermo King service manual solenoid replacement torque and alignment specifications].

Reading the Specifications That Matter in the Field

The Class H insulation rating means the coil winding tolerates continuous operating temperatures up to 180°C, which is relevant when the solenoid sits adjacent to engine heat in a transport refrigeration unit. The stainless steel armature resists corrosion from fuel exposure and condensation cycles typical in cold chain operation. Viton O-rings maintain seal integrity across the -40°C to +85°C operating range, preventing fuel weeping that causes intermittent shutdowns. The 5 bar pressure rating provides margin above typical fuel system pressures encountered in these units.

The Hidden Cost of Shipping the Wrong Variant

When a solenoid arrives with the correct reference number but the wrong connector orientation, the machine sits down while a replacement transits. When the plunger stroke is slightly off, the unit may run but fail to shut down cleanly, causing fuel system flooding that damages downstream components. Fleet maintenance teams absorb these costs as repeated downtime events that never appear on a single repair order [NEED_CITE: cold chain fleet downtime cost attribution for component mismatch].

Why Buyers Confirm Fitment Here Before Ordering

We produce selected part lines in our own facility and source the remainder from qualified ISO-certified partners, so both carry the same warranty terms. Eight product categories mean a complete repair list ships as one consignment. Minimum order is one piece, so you can request a sample for physical fitment testing before committing to a fleet-level order. Part identification works from a part number, machine model, photograph, or nameplate image—useful when the original plate is worn or painted over. Cross-reference verification covers superseded and alternate numbers across Thermo King generations. Our technical team confirms compatibility, variant, and grade before anything ships.

Documentation & Verification

• Commercial invoice and packing list matching all reference numbers to your unit serial
• Part compatibility and cross-reference sheet marking 41-9100 through 42-1700 as reference only
• Quality inspection record confirming connector pin depth and mounting hole spacing
• Warranty terms covering manufacturing defects for the stated period
• Packing photographs showing solenoid condition before crating
• HS code and customs documentation support for cross-border shipment

Fitment Check Before Installation

• Compare mounting hole spacing on the new solenoid against your removed unit before assembly
• Verify connector pin depth and type match the existing wiring harness plug
• Confirm plunger stroke by measuring travel against the specification for your unit build
• Check Viton O-ring seating and surface finish before applying fuel system pressure
• Test energize and de-energize function before reassembling surrounding components
• If any dimension does not match, halt installation and request cross-reference re-verification

Requesting a Fitment-Confirmed Quote

Send your Thermo King unit model, serial number, or a photograph of the existing solenoid and nameplate. We will verify which of the five cross-reference numbers applies to your specific build and confirm connector type, mounting pattern, and plunger stroke. Sample units are available for fitment confirmation before you place a fleet-level order.

Frequently Asked Questions

Q: How do I confirm which of the five reference numbers fits my specific Thermo King unit? A: Provide your unit model and serial number, or a clear photograph of the existing solenoid and nameplate. We cross-reference against Thermo King production revisions to identify which of the five numbers—41-9100, 42-0100, 41-4306, 41-7886, or 42-1700—matches your specific build. This verification covers superseded numbers and variant differences that catalog listings alone do not resolve.

Q: My nameplate is worn or painted over—can I identify the right solenoid from the machine model alone? A: Yes, though accuracy improves with additional information. The machine model narrows the range of compatible variants. A photograph of the existing solenoid's connector type, mounting flange, and any visible markings on the coil housing allows us to confirm the correct variant even without a readable nameplate.

Q: Are 41-9100 and 42-0100 interchangeable, or do they fit different unit generations? A: These numbers may reference functionally similar solenoids produced in different revisions, but connector configuration and mounting dimensions can differ between them. We verify interchangeability against your specific unit serial number rather than assuming cross-compatibility based on catalog listings alone.

Q: Can I get a sample to test fitment before ordering for my whole fleet? A: Yes. Minimum order is one piece. Request a sample unit, install it on one machine to confirm physical fitment, connector match, and functional operation, then proceed with a fleet-level order once verified. This approach eliminates the risk of receiving a full shipment that does not match your units.

Q: What connector type and pin configuration does this solenoid use? A: Connector type varies by Thermo King unit generation and production revision. After receiving your unit model and serial number, we confirm the exact connector type, pin count, and pin depth required for your solenoid. This ensures the replacement mates directly with your existing wiring harness without adapters.