Well Service Pumps WS305

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Key Specs

Maximum Input
3000 BHP
2237 bkW
Maximum RPM
275 r/min
275 r/min
Number of Plungers
5 plg
5 plg


When your job needs a stimulation pump, we're ready. Our full line of well stimulation pumps are designed and manufactured by Caterpillar, in Caterpillar factories for single-sourcepackage confidence. WS305 well stimulation pumps are ideal for well stimulation applications using Cat 3512C (HD) engines and TH55 transmissions. Cat well stimulation pumps arebacked by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty. Cat WS223 Well Stimulation Pump. Maximumpower input: 2237 bkW (3000 bhp) @ 275 rpm.

Product Specifications for WS305

Maximum Input 3000 BHP 2237 bkW
Maximum RPM 275 r/min 275 r/min
Number of Plungers 5 plg 5 plg
Stroke - Length 10 in 254 mm
Pump Weight 24000 lb 10886 kg
Gear Ratio 5.55:1 5.55:1
Rod Load 250000 lb 113398 kg
Bore Centers 13 in 330.2 mm

WS305 Standard Equipment

Fluid Ends

  • Valve-over-valve design simplifies valve, seat, and plunger installation
  • Full line of 1502 discharge flanges - male, female, and blank
  • Zoomie or Log-style suction manifold available
  • Grooveless valve stop, grooveless design eliminates stress risers present with a grooved valve stop design
  • Plungers with advanced surface technology
  • Premium plunger packing
  • Polypak seals for more reliable sealing at suction cover and discharge flanges
  • Fluid end components designed to maximize interchangeability across our fluid end line and with industry standard fluid ends
  • Optimized autofrettage process

Power Ends

  • Reverse helical pinion and bull gear design - great reliability
  • Fully welded structure with additional internal supports
  • Two-piece stay rod design - pretensioned stay rod lowers cyclic loading and fatigue stress
  • Nose plate-to-frame design includes a dovetail interlocking design, which increases the structural strength
  • Forged or fabricated bull gears - no cast material
  • Forged crankshaft - one piece

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