CAT Pumps 5CP2140WCS.3400 Pump, 4.0 GPM, 2500 PSI
Genuine Cat Pumps OEM — Cat Pumps Corporation, HQ Minneapolis, MN — supplied by ForeverPure Corporation, an authorized Cat Pumps distributor in Santa Clara, California.
The Cat Pumps 5CP2140WCS.3400 is a triplex plunger pump in the Cat Pumps 5CP Series Triplex Plunger Pump family, rated for 4.0 GPM at 2500 PSI. 5CP is Cat Pumps' professional-grade compact triplex plunger pump series with ceramic plungers, hardened shaft, and high-pressure service rating — an industry-standard direct-drive pump for OEM pressure washers and detailed spray equipment.
Typical Applications & Industries
Common Applications
- Professional pressure washers
- Car wash equipment
- Carpet cleaning
- Industrial cleaning systems
- Small reverse osmosis
Industries Served
- Water treatment & desalination
- Commercial car wash & detailing
- Agriculture & irrigation
- Oil & gas (produced water)
- Food & beverage processing
- Industrial cleaning & facility services
Documentation & Service
📄 Cat Pumps Data Sheet (PDF)🔧 Cat Pumps CP Plunger Service Manual (PDF)
The data sheet carries the specifications, the exploded view, the numbered parts list and the seal and valve kit tables. The service manual covers installation and start-up, valve and seal servicing, the torque chart and troubleshooting.
Servicing the seals — Cat Pumps 5CP2120W / 5CP2140WCS / 5CP2150W / 5CP2120B / 5CP2140BCS / 5CP2150B — Cat Pumps
Servicing the valves — Cat Pumps 5CP2120W / 5CP2140WCS / 5CP2150W / 5CP2120B / 5CP2140BCS / 5CP2150B — Cat Pumps
Dimensions & Mechanical Data
Overall size: 10.31 x 10.00 x 5.79" (262 x 254 x 147) — pump weight 19.14 lbs (8.7 kg). The shipping weight shown at checkout already allows for packaging.
| Mechanical specification | U.S. | Metric |
|---|---|---|
| Rated pump speed | 950 rpm | 950 rpm |
| Inlet pressure range (950 rpm) | -5–60 psi | -0.35–4.1 bar |
| Inlet pressure range (1725 rpm) | Flooded to 60 psi | Flooded to 4.1 bar |
| Max. liquid temperature (NBR) | 160° F | 71° C |
| Bore | 0.787" | 20 mm |
| Stroke | 0.709" | 18 mm |
| Crankcase capacity | 17 oz | 0.50 l |
| Inlet ports (2) | 1/2" NPT(F) | 1/2" NPT(F) |
| Discharge ports (2) | 3/8" NPT(F) | 3/8" NPT(F) |
| Shaft diameter | 0.787" | 20 mm |
Figures from the Cat Pumps data sheet for this model (5CP2120W_L). Cat publishes the overall envelope and the port and shaft interface above; if you need a fully dimensioned drawing for a skid layout, ask us and we will request it from Cat Pumps.
Performance & Sizing
The 5CP2140WCS.3400 is a positive-displacement triplex plunger pump, so it has no flow-versus-pressure curve in the sense a centrifugal pump does, and Cat Pumps does not publish one. Flow is set by the plunger displacement and the shaft speed and stays essentially constant as discharge pressure rises. Pressure is set by the restriction downstream — the nozzle, orifice or membrane array — and capped by the regulating device, not by the pump.
The 5CP is a belt-drive frame, so the drive ratio sets the pump speed. To run at a speed other than the rated 950 rpm, or to size a motor and pulleys, use the relations printed on the Cat Pumps data sheet:
| Flow at another speed | Desired GPM = Rated GPM × (Desired RPM ÷ Rated RPM) |
| Required horsepower | HP (electric brake) = GPM × PSI ÷ 1460 |
| Motor pulley size | Motor pulley OD = (Pump pulley OD × Pump RPM) ÷ Motor RPM |
Maximum ratings apply individually — do not assume maximum flow and maximum pressure can be taken together. A primary pressure-regulating device and a secondary safety relief device are both required in the system. Talk to us before ordering if your duty sits near a limit.
Frequently Asked Questions
What is the Cat Pumps 5CP2140WCS.3400?
The Cat Pumps 5CP2140WCS.3400 is a triplex plunger pump from the Cat 5CP Series Triplex Plunger Pump family, rated at 4.0 GPM and 2500 PSI maximum pressure. Cat Pumps are positive-displacement triplex pumps supplied by Cat Pumps Corporation, headquartered in Minneapolis, Minnesota, USA.
What is the Cat Pumps 5CP2140WCS.3400 used for?
Typical applications include professional pressure washers, car wash equipment, carpet cleaning, industrial cleaning systems. Cat Pumps triplex pumps are preferred in continuous-duty industrial service because their positive-displacement plunger or piston design delivers smooth constant flow at high pressure with long service life.
How much does the Cat Pumps 5CP2140WCS.3400 cost?
Pricing is quote-based and depends on configuration, quantity, and delivery schedule. ForeverPure Corporation, as an authorized Cat Pumps distributor, provides factory-direct pricing with same-day quotes. Call +1-408-969-2688 or use the Request a Quote form.
What parts and service kits are available for the Cat Pumps 5CP2140WCS.3400?
A full line of genuine Cat Pumps OEM service kits, seals, valves, plungers, and accessories is available. The specific kits compatible with 5CP2140WCS.3400 depend on the pump's frame, material, and seal material — contact ForeverPure for a cross-reference list and current pricing.
Where is the Cat Pumps 5CP2140WCS.3400 manufactured?
Cat Pumps Corporation is headquartered in Minneapolis, Minnesota (1681 94th Lane NE, Minneapolis, MN 55449) and has been the Cat Pumps brand owner since 1968. Cat Pumps triplex pumps, spare parts, and accessories are manufactured at the company's US and Japan production facilities to Cat Pumps Corporation's ISO 9001:2015 factory specifications — the country of origin for this specific SKU is listed in the technical specifications table above.
How do I get a quote or datasheet for the Cat Pumps 5CP2140WCS.3400?
Call ForeverPure Corporation at +1-408-969-2688, email sales@foreverpure.com, or request a quote through the website. As an authorized Cat Pumps distributor, ForeverPure provides factory-direct pricing, datasheets, cross-reference support, and same-day turnaround on most quote requests.
What is the warranty on the Cat Pumps 5CP2140WCS.3400?
Cat Pumps factory warranty: 1 year on complete pumps, 90 days on parts and accessories, from date of purchase from an authorized distributor. ForeverPure honors and administers Cat Pumps warranty claims for customers in North America.
Service Videos
Cat Pumps’ own service videos for this pump. Follow them alongside the service manual and data sheet — the manual carries the torque figures and the exploded view.
Servicing Seals - Cat Pumps Model 5CP2120W, 5CP2140WCS, 5CP2150W, 5CP2120B, 5CP2140BCS, 5CP2150B
Servicing Valves - Cat Pumps Model 5CP2120W, 5CP2140WCS, 5CP2150W, 5CP2120B, 5CP2140BCS, 5CP2150B
Recommended Accessories for This Pump
Cat Pumps specifies these accessories for this pump. A regulator or unloader and a relief device are required on any high-pressure system; an inlet filter and the correct crankcase oil are what actually determine how long the pump lasts.
| Accessory | Cat Pumps part |
|---|---|
| Pressure Regulator | 7003 |
| Pop-Off Valve - High Temp. | 33962S |
| Pulsation Dampener-Rechargeable-FPM | 6030 |
| SS Pressure Gauge | 6073 |
| Crankcase Oil | 6107 |
| Oil Drain Kit | 34334 |
| Inlet Pressure Stabilizer | 711500 |
Accessory pairings as published by Cat Pumps for this model. Not sure which you need? Send us your duty point and we will specify the set.
