Oil Enquiries

Oil Enquiries

Popular Questions

• What type of oil is does my pump require?
How much oil does the pump require?

When should I change my oil?
• Why is my pump leaking oil?
• Why is my oil a milky color? 


What type of oil does my Cat Pump require?

Premium base stocks are the backbone of the formulation that provides superior lubricity to protect internal drive components. The proprietary high technology additive system offers a number of superior performance advantages:

  • Anti-wear additives protects metal to metal drive surfaces extending drive life
  • High oxidative and chemical stability resists deposit formations and provides consistent fluid performance
  • Premium anti-corrosion additives offer protection in the most demanding operating environments

Cat Pumps Genuine Crankcase Oil Part Numbers:

Part Number
Description Litre per Bottles
6132 Cat Pumps Crankcase Oil 1
6133 Cat Pumps Crankcase Oil 4
6134 Cat Pumps Crankcase Oil 25

Download our MSDS Sheet         Download our Sell Sheet



How much oil does my Cat Pump require?


All Cat Pumps pressure wash pumps feature a oil bubble gauge located on the rear cover at the crankcase. Ensuring the pump is on a level surface, fill the crankcase until the oil level is in the center of the red dot.

If too much oil is added, oil will spit from the red fill cap. Although this will not harm the pump, reduce the oil level to center of the bubble gauge.

If you need to know how much oil is required, capacities can be found on pump data sheets. 

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How often should I change my oil?

Optimum pump life is achieved by following Cat Pumps service recommendations. Crankcase oil should be changed after the initial 50-hour running period, then every 3 months or 500 hours thereafter unless a written waiver from Cat Pumps is issued based on application parameters.

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Why is my pump leaking oil?


To properly diagnose an oil leak, you must first determine the source. Find your source below to determine proper fix.

Oil Cap - If the source of you leak is out the top of the oil cap, the oil level is too high. Drain oil until level is at center of bubble gauge.

Between crankcase and manifold - If the source is in this area, the oil seals are worn and are in need of replacement. Replacement part numbers can be found on data sheets.

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Why is my oil a milky color?


If the pump is allowed to run after the low-pressure seals and high-pressure seals have become worn, water may eventually travel back along the plunger rod and past the oil seal. Water is a contaminant to the crankcase oil and can cause damage to the drive-end components. The water will cause the oil color to change to a milky consistency initially and in severe situations can cause damage to the drive-end. Remember to replace the plunger retainer O-ring each time the seals are replaced. The plunger retainer O-rings are supplied in the seal kit for the pump.

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