Fuel Injection Pump Overhaul Kit for Delphi Lucas CAV DPA – Direct Fit

Cross-Reference Verified — every superseded Delphi Lucas CAV DPA number in this kit has been mapped to the correct pump generation variant before dispatch.

Technical Specifications

Application Suitability

Why the Same DPA Part Number Ships in Four Different Kit Variants

A single base number can cover multiple pump generations with incompatible seal profiles and plunger dimensions.

Back in a Foshan workshop, I once pulled a Delphi Lucas CAV DPA pump apart and matched the overhaul kit to the printed part number exactly. The seals, plungers, and delivery valves all looked right on the bench. But the oil-port phase was off by ninety degrees, and the assembled pump would not seat in the engine bay. Same base number, wrong variant. That kind of mismatch does not show up until the machine is partially reassembled and the clock is already against you. Cross-reference tables copied between sellers carry these errors forward, so a listed interchange can point to a kit that physically fits the bench but not the machine [NEED_CITE: Delphi Lucas CAV DPA pump variant identification guide]. A correct Fuel Injection Pump Overhaul Kit for Delphi Lucas CAV DPA cross reference fitment starts with the pump serial plate, not just the stamped number.

Mapping Superseded Numbers to the Right Kit Generation

Delphi and Lucas CAV revised the DPA pump design across several production runs, superseding earlier part numbers without changing the external housing casting. The numbers 7135-110, 7123-576L, and 7139-223 may all appear in different supplier catalogs for what looks like the same pump. Our cross-reference verification process traces each superseded number back to its specific pump serial range, governor type, and port configuration so the Fuel Injection Pump Overhaul Kit matches your unit. We do not rely on copied interchange tables; every mapping is confirmed against production documentation.

Interface and Port Verification Before You Commit

The DPA series uses several port layouts across its production life, and the physical difference between a 7123-576L and a 7123-576M kit comes down to seal groove depth, plunger diameter, and tappet profile. We verify oil-port position, delivery-valve seat angle, and governor-spring rate against your pump serial number. When a nameplate is worn or painted over, a photograph of the pump housing casting number plus the machine model is usually enough to narrow the correct variant. A sample kit is available for physical fitment confirmation before any bulk commitment [NEED_CITE: fuel injection pump variant identification methods for rotary DPA pumps].

Seal Material and Tolerance Detail That Matters on the Bench

The Viton®-based O-rings and gaskets in this kit are selected for diesel-fuel compatibility across the –20 °C to +120 °C operating window typical of agricultural and industrial DPA applications. Nitrile seals would harden and leak within one season under modern low-sulphur diesel formulations. Component machining tolerance is held to ±0.005 mm, which keeps plunger-to-barrel clearance within the range needed for consistent delivery pressure across all cylinders. Delivery valves and governor springs in the kit are matched to the specific DPA variant, so spring rate and valve-lift correspond to the pump's original calibration specification.

The Cost of a Kit That Almost Fits

A rebuild kit that seats on the bench but carries the wrong port-phase or seal-groove depth forces the mechanic to disassemble, return the kit, and wait for the correct variant. On a tractor in the middle of plowing season, that gap is measured in missed weather windows, not just labor hours. A forced fit with mismatched plunger diameters produces uneven fuel delivery that shows up as rough idle and poor combustion weeks later — long enough for the machine to leave the workshop and fail in the field [NEED_CITE: consequences of incorrect fuel injection pump rebuild kit installation]. Fitment verification before installation avoids both scenarios.

How Verification Works Here

We run our own production on selected seal and gasket lines and source remaining components from ISO 9001-qualified manufacturing partners, all under one account and one warranty term. Cross-reference verification covers superseded numbers and alternate formats such as 7123576L versus 7123-576L so there is no ambiguity. Identification is possible from a part number, machine model, pump serial photograph, or nameplate image. MOQ starts at one piece, so a single emergency overhaul is never blocked by volume requirements. A sample kit ships ahead of bulk orders so your workshop can confirm fitment on the bench before committing to a fleet quantity.

Documentation & Verification

• Commercial invoice listing each cross-reference number as interchange reference only
• Part compatibility sheet mapping your pump serial to correct kit variant
• Dimensional check record on plunger diameter and seal groove depth
• Warranty terms covering manufacturing defects for six months
• Packing photographs showing kit contents before sealing
• HS code and customs documentation for international shipment

Fitment Check Before Installation

• Compare delivery-valve seat angle on new kit against removed components
• Verify tappet profile matches pump cam-box before pressing into housing
• Confirm O-ring cross-section seats flush in groove without pinch
• Check governor-spring free length against pump specification sheet
• If any interface does not align, stop and request variant re-verification

Request a Fitment Confirmation

Send the pump serial number, machine model, or a clear photograph of the nameplate — even if partially worn — and we will return a verified cross-reference match with the correct kit variant identified. For fleet orders, include the pump housing casting number so we can confirm generation compatibility across multiple units before quoting.

Frequently Asked Questions

Q: How do I confirm which cross-reference number applies to my DPA pump? A: Provide the pump serial number or a photograph of the nameplate. We map your serial range against production records to identify whether 7135-110, 7123-576L, 7139-223, or another listed number is the correct match. Copied interchange tables often carry errors, so we verify every mapping independently before confirming the kit.

Q: Are 7123-576L and 7123-576M interchangeable? A: No. These are different generation variants with distinct seal groove depths and plunger specifications. Installing the wrong variant leads to port-phase mismatch and fuel delivery errors. We confirm which variant your pump requires based on serial range before shipping.

Q: What if my pump nameplate is worn and only the machine model is known? A: A photograph of the pump housing casting number combined with your machine model is usually sufficient for identification. We cross-reference the casting against known DPA fitment records to narrow the correct overhaul kit variant without needing a readable serial plate.

Q: Can I get a sample kit to verify fitment before ordering in bulk? A: Yes. A single sample kit ships for physical bench-fitment confirmation before any fleet or workshop quantity is committed. This lets your mechanics verify seal seating, plunger clearance, and port alignment on one pump before the full order is released.

Q: Do superseded part numbers still work with current pump builds? A: Superseded numbers are valid as cross-reference identifiers, but the kit contents may differ from the original specification. We confirm whether the updated kit variant is compatible with your specific pump generation and advise if any additional components are needed for a correct rebuild.