Description
The 7180 977S pump head and rotor is a critical component used in rotary/distributor-style diesel injection pumps (e.g., Delphi CAV, Lucas DPA). This assembly includes the head (rotor housing), rotor, barrel, and plunger—manufactured to OEM specifications for accurate fuel delivery and timing control:
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Features a 3/8.5 mm plunger diameter with right-hand rotation
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Restores precise pressure generation within the pump, essential for correct fuel atomization
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Made from durable steel alloys, built for high-wear resistance and long service life
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Serves as a direct-fit part for rebuilding engines like the Perkins 240/265/285/290 and many industrial diesel applications
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Typically supplied with a 3–6 month warranty, depending on supplier
This OEM-style head/rotor is engineered to meet original equipment tolerances, ensuring smooth engine performance, fuel efficiency, and longevity after pump rebuilds.
Key Specifications
| Attribute | Details |
|---|---|
| Part Number | 7180 977S |
| Configuration | Hydraulic head + rotor assembly |
| Plunger Size | 3/8.5 mm (approx. 8.5 mm) |
| Rotation Direction | Right-hand |
| Pump Type | DPA-style (Delphi/Lucas CAV) |
| Material | Steel/alloy for wear resistance |
| Warranty | 3–6 months supplier warranty |
| Applications | Perkins DPA pumps, farm machinery, industrial diesels |
Why It Matters:
Replacing the pump head and rotor rejuvenates worn DPA injection pumps by restoring internal tolerances. This leads to stable fuel pressure, improved engine performance, smoother idle/transitions, and lower emissions.
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