12V Fuel Cut-off Solenoid 7167-620B | Verified Fitment for CAV LUCAS DPA DPS

Cross-reference verified — every 7167-620B stop solenoid ships with a dimension-checked plunger and housing interface to match CAV LUCAS DPA and DPS pump variants.

Technical Specifications

Application Suitability

When the Part Number Matches but the Pump Rejects It

Superseded numbers and variant suffixes hide dimensional changes that a catalog listing alone will never reveal.

I have stood on a job site in Central Asia watching a machine sit idle for days because a 7167-620B replacement solenoid had its inlet port clocked 90 degrees off from the pump housing bore. The part number was correct. The variant was wrong. Cross-reference tables copied between sellers carry these errors forward without anyone checking the physical interface [NEED_CITE: CAV LUCAS DPA DPS pump variant identification practices]. A 12V Fuel Cut-off Solenoid for CAV LUCAS DPA DPS cross reference demands more than a number match — it demands dimensional verification against the specific pump serial range sitting on your bench.

Identifying the Correct DPA or DPS Variant

The CAV LUCAS DPA and DPS families span multiple production generations, each introducing subtle changes to the solenoid mounting interface. A 12V Fuel Cut-off Solenoid for CAV LUCAS DPA DPS cross reference must account for these generational shifts. Earlier DPA pumps often use a two-bolt flange with a specific clocking angle, while later DPS units may employ a three-bolt pattern or a twist-lock collar. We verify your pump serial number against known build variations before confirming the solenoid variant, so the plunger seats flush and the port aligns without modification.

Interface Details That Decide Fitment

The difference between a direct installation and a returned part often lives in three measurements: plunger diameter and travel length, housing bore depth, and electrical connector orientation. On DPA systems the connector typically exits at a fixed angle relative to the fuel inlet, while DPS variants rotate the connector position to accommodate updated harness routing. We check port position against your existing pump housing photograph or drawing [NEED_CITE: dimensional tolerance standards for fuel injection solenoid interfaces]. Bolt hole spacing, O-ring groove diameter, and plunger tip profile are each confirmed so the solenoid drops in without adapter plates or improvised wiring.

Reading the Specifications for Real-World Use

The copper coil on this stop solenoid is wound to hold stable resistance across the -40°C to +120°C operating window, which matters when an excavator idles in a cold morning start and then works under full hydraulic load by midday. Copper's thermal conductivity keeps coil temperature uniform, reducing the chance of an open circuit mid-shift. The hardened steel plunger resists wear from thousands of actuation cycles against the pump bore, maintaining the sealing face integrity that prevents fuel weep past the shut-off point. The 12V rating matches standard machine electrical systems without requiring relay upgrades or voltage droppers.

What Happens When the Wrong Variant Gets Installed

A solenoid that bolts on but has the wrong plunger depth will either fail to cut fuel completely — leaving the engine running after key-off — or bottom out inside the pump bore, creating a shearing load that cracks the plunger tip within hours. A misaligned port forces the installer to bend the fuel line, introducing a stress point that eventually weeps diesel onto a hot exhaust manifold. These are not theoretical failures; they are the exact outcomes I have documented on machines where the reference number was right but the variant was not [NEED_CITE: fuel injection pump solenoid misalignment failure analysis]. The hidden cost is never just the part — it is the second teardown, the second gasket set, and the second day the machine does not earn.

Why Verify Fitment Here Before Ordering

Our technical team cross-references 7167-620B and 9009-049 against known supersession paths, catching cases where a catalog lists them as interchangeable but the physical parts are not. 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 — meaning you get consistent dimensional control whether the batch is self-produced or sourced. A sample unit ships for fitment confirmation before you commit to a bulk order, which matters when standardizing across a mixed fleet. Part identification works from a worn number, a machine model, or a photograph of the existing solenoid and its pump housing.

Documentation & Verification

• Commercial invoice listing 7167-620B with cross-reference 9009-049 noted as reference only
• Dimensional check sheet covering plunger length, bore depth, and bolt pattern before dispatch
• Quality inspection record with coil resistance and actuation test results
• Warranty terms document specifying coverage against manufacturing defects
• Packing photographs showing solenoid orientation and protective wrapping
• HS code and customs classification support for international shipment

Fitment Check Before Installation

• Compare new solenoid plunger length against removed unit to confirm seating depth
• Verify port clocking angle by aligning fuel inlet with pump housing bore before tightening
• Test coil resistance with a multimeter to confirm continuity matches specification
• Dry-fit the solenoid without fuel lines to check bolt pattern alignment and clearance
• Confirm connector type matches existing harness before final electrical connection
• If variant mismatch is found, retain original solenoid and contact us with pump serial for re-verification

Send Us the Details That Confirm Fitment

To verify compatibility before shipment, share your pump model designation, serial number, and ideally a photograph of the existing solenoid showing the connector and port orientation. If the nameplate is worn or painted over, provide the machine model and we will cross-reference the injection system variant. For fleet orders, send the full machine list so we can flag any variant differences across your equipment.

Frequently Asked Questions

Q: How do I confirm this stop solenoid fits my specific DPA or DPS injection pump? A: Provide the pump serial number or machine model so we can cross-reference the correct variant. DPA and DPS families have sub-generations with different plunger depths and port orientations. We verify dimensional compatibility against your specific pump build before confirming the order.

Q: Are 7167-620B and 9009-049 interchangeable for every application? A: Not universally. While they appear as cross-references for identification purposes, certain pump serial ranges accept one number but not the other due to connector orientation or plunger travel differences. We check your specific pump variant before confirming either number will fit.

Q: My nameplate is worn and I only have the machine model — can you still identify the right solenoid? A: Yes. We trace the machine model back to its original injection pump configuration, then narrow down the solenoid variant. A photograph of the existing solenoid and pump housing helps us confirm port position and connector type remotely before shipping.

Q: Can I order a sample to verify fitment before placing a larger order? A: A sample unit is available so you can physically check plunger depth, bolt pattern, and port alignment on your pump before committing to fleet quantities. This step eliminates trial fitment risk when standardizing across multiple machines with different pump generations.

Q: Why does the same base part number appear with different suffixes across listings? A: Suffix variations often indicate changes in connector type, plunger material, or port clocking introduced during production revisions. These differences are real but rarely documented in aftermarket catalogs. We map the suffix to the specific pump serial range it was designed to serve.