System-Matched Supply — Verified against specific DPA and DPS injection pump variants to prevent electrical mismatch and fuel cut-off failure during engine rebuilds.
Technical Specifications
| Parameter |
Value |
| Part Number |
7167-620B |
| Product Type |
Stop Solenoid |
| Cross-Reference |
7167-620B, 7167620B, 9009-049, 9009049 (reference only for identification purposes) |
| Machine Fitment |
Models utilizing CAV LUCAS DPA/DPS fuel systems |
| Voltage |
12V |
| Compatible Systems |
DPA, DPS |
| Condition |
New Aftermarket |
| Warranty |
3-12 months against manufacturing defects |
| Certification |
ISO 9001 |
Application Suitability
| Engine System |
Related Components |
| Fuel Injection Pump (CAV LUCAS DPA) |
Pump seal kits, fuel transfer lines, injection nozzles |
| Fuel Injection Pump (CAV LUCAS DPS) |
Electronic governor wiring, fuel filters, return line fittings |
| Engine Shutdown Circuitry |
Wiring harness connectors, relay switches, ignition key contacts |
| Diesel Fuel Delivery System |
Primary and secondary fuel filters, water separators, feed pumps |
Why the Same Stop Solenoid Fails Repeatedly on the Same Machine
A replacement 12V Fuel Cut-off Stop Solenoid engine rebuild unit often fails within weeks when the root cause lies elsewhere in the system.
In mining operations across Latin America, I have watched workshops replace this solenoid multiple times on a single machine, only to have it burn out again. The problem usually traces back to voltage supply issues—corroded connectors, damaged wiring harnesses, or a failing relay sending erratic current. Contaminated fuel causes the internal valve to stick, forcing the solenoid to work harder until the coil overheats [NEED_CITE: diesel fuel contamination effects on injection system components]. Without addressing these system-level issues, even a perfectly manufactured stop solenoid will fail prematurely.
Matching the Solenoid to Your Specific Fuel Injection System
The 12V Fuel Cut-off Stop Solenoid engine rebuild component must match the exact DPA or DPS injection pump variant on your machine. Production runs of the same engine model sometimes used different pump configurations, requiring solenoids with different connector types or mounting patterns. Before ordering, verify the injection pump serial number and cross-reference it against the solenoid specifications to ensure electrical and mechanical compatibility.
System-Level Diagnostics Before Component Replacement
When a stop solenoid fails, investigate the entire fuel cut-off circuit. Check voltage at the connector during engine shutdown—insufficient voltage indicates wiring degradation or poor connections [NEED_CITE: electrical system diagnostic procedures for diesel injection components]. Inspect fuel quality for particulate contamination that could jam the solenoid valve. Replace fuel filters and clean the fuel tank if contamination is present, addressing the fault that destroyed the previous solenoid rather than just replacing the failed part.
Electrical Specifications and Operational Demands
The 12V rating means this solenoid operates within standard heavy equipment electrical systems, but actual voltage fluctuates during engine cranking and alternator charging cycles. The coil must withstand voltage spikes when the ignition circuit opens, and sustained current draw generates heat that degrades insulation over time [NEED_CITE: electromagnetic coil thermal management in diesel applications]. Quality aftermarket units use winding specifications and insulation materials designed for these thermal cycles, not just initial engagement function.
The Hidden Cost of Repeated Rework
Replacing a stop solenoid seems straightforward until you factor in the cumulative downtime from multiple failures, the labor cost of repeated disassembly, and the risk of damaging adjacent fuel system components during each removal. Workshops that skip system diagnostics and simply swap parts end up spending more over time than those who invest in proper troubleshooting upfront [NEED_CITE: total cost of ownership analysis for diesel fuel system repairs]. A single misdiagnosis can cascade into weeks of machine unavailability.
Why Source This Component Through XUNPO
We maintain stock of both self-produced and qualified sourced fuel system components under one warranty and one account. Our technical team verifies DPA/DPS pump compatibility against engine serial numbers before shipment, catching variant mismatches that generic cross-reference tables miss. Minimum order from one piece means you can test fitment before committing to bulk. Each unit ships with quality inspection records documenting coil resistance testing and engagement cycle verification, plus part compatibility sheets confirming the cross-reference match to your specific injection system.
Documentation & Verification
- Commercial invoice listing stop solenoid quantity and cross-reference numbers for customs clearance
- Part compatibility sheet confirming DPA/DPS pump variant match (cross-reference only)
- Quality inspection record showing coil resistance and functional cycle test results
- Warranty terms covering manufacturing defects for 3-12 months from dispatch date
- Packing photographs documenting condition before shipment
- HS code documentation support for fuel system component import classification
Installation & Rebuild Sequence
- Disconnect battery before removing old solenoid to prevent electrical shorts during installation
- Clean mounting surface on injection pump housing to ensure proper seal and alignment
- Verify connector pin condition and replace corroded terminals before attaching new solenoid
- Torque mounting bolts to manufacturer specification—overtightening distorts the solenoid body
- Test fuel cut-off function before reassembling engine covers to confirm proper engagement
- Document installation date and machine hours for future maintenance tracking
Requesting a Compatibility Quote
Provide your engine model, injection pump serial number, and any previous rebuild history so we can verify which DPA or DPS variant your machine uses. If the nameplate is worn or painted over, send clear photographs of the pump body and existing solenoid connector—we can identify the correct part from physical features alone. Mention any recurring electrical or fuel delivery issues you have experienced so we can advise on system-level components that may need attention alongside the stop solenoid.
Frequently Asked Questions
Q: How do I confirm which DPA/DPS variant my injection pump is?
A: Check the injection pump data plate for the full model and serial number. If the plate is missing or illegible, photograph the pump body, solenoid mounting area, and electrical connector. We cross-reference these physical features against manufacturer specifications to identify your exact pump variant and confirm solenoid compatibility before shipping.
Q: What other fuel system components should I inspect or replace alongside the stop solenoid?
A: Inspect fuel filters for contamination, check fuel lines for degradation, and verify the fuel transfer pump operates correctly. If the previous solenoid failed prematurely, examine the entire electrical circuit including wiring, connectors, and relays. Addressing these adjacent components prevents the same failure from recurring on your replacement unit.
Q: My solenoid failed again quickly—what system-level issues could cause that?
A: Common causes include voltage supply problems such as corroded connectors, damaged wiring, or failing relays that send erratic current. Fuel contamination causing the internal valve to stick forces the coil to overwork until it burns out. Systematic diagnosis of the electrical and fuel delivery systems identifies these root causes before they destroy another replacement component.
Q: Do different engine serial numbers within the same model use different solenoids?
A: Yes, manufacturers sometimes changed injection pump suppliers or configurations during production runs, resulting in different solenoid requirements for the same engine model. The engine serial number determines which pump variant was originally installed. We verify this against your specific serial number rather than relying solely on the engine model designation.
Q: How do I verify the electrical supply is not causing premature solenoid failure?
A: Measure voltage at the solenoid connector during engine shutdown to confirm it reaches specification. Check for voltage drops along the wiring harness that indicate resistance from corrosion or damage. Inspect relay contacts for pitting or arcing. Replace any degraded components in the circuit to ensure stable current delivery to your new stop solenoid.
