Cat Pump Oil – 21oz Bottle

Cat Pumps 6107 21oz Pump Oil

The Cat Pumps 6107 Crankcase Oil is the genuine 21 oz high-pressure pump oil specified by Cat Pumps for its piston and plunger pump crankcases. On marine watermaker installations using Cat Pumps high-pressure pumps, using the correct crankcase lubricant is an important part of scheduled pump maintenance.

Key Features & Technical Information

• Cat Pumps part number 6107
• One 21 oz bottle
• Premium-grade petroleum-based ISO 68 hydraulic oil
• Custom blended for Cat Pumps
• Anti-wear additive package
• Protection against oxidation, rust and corrosion
• Cat Pumps states it is suitable for all of its piston and plunger pumps
• Manufacturer maintenance guidance: change after the first 50 hours, then every 500 hours

Models, Capacity & Selection

Cat Pumps also lists the same ISO 68 crankcase oil in larger packages, but 6107 is the individual 21 oz bottle. Always verify the oil capacity of the specific pump model before filling the crankcase.

Why This Matters Onboard

For a yacht watermaker or pressure system fitted with a Cat Pumps high-pressure pump, the oil level and condition should form part of routine engineering checks. Milky oil may indicate water contamination and should be investigated rather than simply topped up.

Explore more marine watermakers from Yacht-Mate.

Frequently Asked Questions

Is one 21 oz bottle enough for an oil change in my Cat pump?

The required quantity depends on the pump model’s crankcase capacity. Check its data sheet before buying or filling; part 6107 identifies the 21 oz package, not a universal one-pump service quantity.

Can I substitute another ISO 68 oil for Cat Pumps 6107?

Cat Pumps does not recommend alternative oils, even where the grade appears to match. It specifies its own formulated crankcase oil because changes in other manufacturers’ formulations have caused pump problems.

When should I replace the oil in a standard Cat piston or plunger pump?

Cat Pumps specifies the first oil change after 50 operating hours, then every 500 hours. Use the installed pump’s data sheet to determine how much oil to add.

Will topping up with 6107 fix milky oil in my Cat pump?

No. Cat Pumps identifies milky oil as a sign of water contamination that can be associated with worn seals. Investigate the source of water entry rather than treating a top-up as the repair.