CAT Pump Oil is the ISO 68 non-detergent crankcase oil CAT Pumps blends for its own triplex plunger pumps. It runs in the drive end, not the fluid end, lubricating the crankshaft, bearings, and crosshead rods. Buy a single 21 oz bottle (6107) or a 12-bottle case (6100). Key Features ISO 68, non-detergent: Water and grit settle out instead of mixing in, so contaminated oil turns milky and you catch a failing seal before it kills the pump. Anti-wear ZDDP package: Protects the crankshaft, bearings, and crosshead rods at high RPM and pressure, where thinner oil lets metal touch metal. Runs cool and holds its film: Resists oxidation, foaming, and viscosity breakdown (VI 135) through long days in the 150 to 180°F range these pumps run. Anti-rust and anti-corrosion additives: Keeps the drive end protected through wet storage and humid mornings. The oil CAT specifies: Running a CAT pump without CAT oil can void the warranty. This is the OEM oil. Specifications Oil type Petroleum-based, non-detergent (not synthetic) Viscosity grade ISO 68 (about SAE 20) Volume 21 oz per bottle Sold as 1 bottle (SKU 6107) or 12-bottle case (SKU 6100) Change interval First 50 hours, then every 3 months or 500 hours Flash point 400°F (Cleveland Open Cup) Weight 1 bottle about 1.25 lb; 12-bottle case 17 lb What's Included 6107: one 21 oz bottle of ISO 68 crankcase oil 6100: twelve 21 oz bottles (case) Oil only. No hardware. It fits the crankcase (drive end) of CAT Pumps piston and plunger pumps, and other high-pressure plunger pumps that call for ISO 68 non-detergent oil. Most direct-drive triplex models hold 8 to 10 oz, so check your pump's data sheet for the exact fill. It doesn't fit CAT R-Series or Specialty Model pumps, and it isn't gear lube for the gear end of gearbox pumps. Some models call for ISO 100 instead of ISO 68, so confirm your model first. How It Works The oil fills the crankcase and lubricates the parts that turn the engine's rotation into the back-and-forth stroke of the plungers. It's sealed off from the fluid end where water or chemical moves through, so it never touches what you're pumping. CAT specs a non-detergent oil on purpose. Water and debris separate out and settle instead of staying in suspension, so contamination shows up as milky oil you can see and drain clean. Check the level at the bubble gauge with the pump off on level ground, and fill to the red dot. Pairs Well With In-Line Filter Comet P40 Oil Kit Industrial Pressure Washer Pump Oil Frequently Asked Questions Can I use regular motor oil in my CAT pump? No. CAT specs its own non-detergent ISO 68 oil. Detergent motor oils foam and hold water in suspension, which hides contamination and can cost you the pump. CAT also pulled its old alternative-oil approvals after third-party formula changes caused problems, and off-brand oil can void the warranty. How often should I change CAT pump oil? Change it after the first 50 hours to flush out break-in metal, then every 3 months or 500 hours, whichever comes first. If the oil ever turns milky, change it right away and check your seals. Water is getting past them. Is the single bottle (6107) the same oil as the case (6100)? Yes. Both are the identical ISO 68 crankcase oil. The only difference is packaging. The 6107 is one 21 oz bottle, the 6100 is a case of twelve.
