Description
The FW2-3540S is a high-performance, solid-shaft triplex plunger pump from General Pump (GP). It belongs to the FW series, which is known for its compact design and high-pressure output relative to its size. Because it runs at 1450 RPM, it is designed for a belt-drive or flexible-coupling setup with an electric motor or a gear-reduced gas engine.
Technical Specifications
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Flow Rate: 3.4 GPM (12.9 LPM)
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Max Pressure: 4000 PSI (275 bar)
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Speed: 1450 RPM
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Shaft Diameter: 24 mm (Solid Shaft)
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Inlet Port: 1/2″ NPT-F
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Discharge Port: 3/8″ NPT-F
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Weight: ~19 lbs
Maintenance & Repair Kits
To keep this pump hitting that 4000 PSI mark, you’ll need to keep an eye on the “wet end” components.
| Kit Description | Part Number | Purpose |
| Complete Valve Kit | 10001-01607 | Rebuilds all 6 valves (Inlet & Discharge). |
| Seal Kit (15mm) | 10001-01104 | High/Low pressure seals for all 3 plungers. |
| Oil Seal Kit | 10001-01101 | Crankcase oil seals (behind the plungers). |
| Ceramic Plunger | 10001-01501 | Individual 15mm ceramic plunger. |
| Pump Oil (16 oz) | GP Series 100 | ISO 68 Non-Detergent (Standard GP Oil). |


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