Pressure washer pump oil keeps your triplex or piston pump crankcase running cool and sealed. This is a non-detergent, non-foaming oil for general industrial pumps, sold as a 1-liter bottle. One bottle covers several oil changes on most pumps.
Key Features
-
Non-detergent and non-foaming: A pump crankcase has no oil filter. This oil won't foam under pressure cycling and starve the seals the way motor oil does.
-
Anti-wear and rust inhibitors: Cuts friction and heat on the crank, rods, and crossheads, and keeps the crankcase from rusting between jobs.
-
Built for general industrial pumps: Made for triplex and piston pump crankcases on gas or electric machines.
-
1-liter bottle: Most pump crankcases hold 5 to 27 ounces, so one bottle covers several changes.
Specifications
| Type |
Non-detergent, non-foaming pump crankcase oil |
| Additives |
Rust and oxidation inhibitors, anti-wear, foam suppressant |
| Container |
1 liter (about 33.8 fl oz), single bottle |
| Use |
General industrial triplex and piston pump crankcases |
| Change interval |
First change at 50 hours, then every 150 hours |
| Not for |
Engines, the high-pressure water side, or pump gearboxes |
What's Included
- One 1-liter bottle of pump oil
Works as a maintenance oil for general industrial triplex and piston pumps, including many General Pump and Comet crankcases and standard AR pumps. Check your pump manual before you switch oils. CAT pumps call for their own ISO 68 oil, and AR's synthetic-only XJ, SJ, and BK pumps require AR's. The wrong oil in those can void the warranty. Keep this oil off the high-pressure water side and out of your chemical lines.
How It Works
Pump oil sits in the crankcase at the drive end and lubricates the crankshaft, bearings, rods, and crossheads, cutting friction and heat at high RPM. It has to be non-detergent because a pump crankcase has no oil filter. Detergent motor oil foams under pressure cycling, creates air pockets, and starves the seals. Fill to the sight-glass midpoint, never over, and change it on a schedule rather than running it until it's used up.
Pairs Well With
Frequently Asked Questions
What viscosity is this pump oil?
The grade isn't listed on this bottle, so check your pump manual for the oil weight your pump calls for and confirm it matches before you fill. If your manual specifies a grade like CAT's ISO 68, use the oil your pump maker specifies instead.
Is pump oil the same as motor oil?
No. Motor oil's detergents foam under the pressure cycling inside a filterless pump crankcase, which causes air pockets, lost lubrication, and seal failure. Use a non-detergent pump oil only.
How often should I change pump oil?
For a general industrial pump, change it after the first 50 hours, then every 150 hours. Intervals differ by brand, so check your manual. General Pump lists every 500 hours or 3 months, and CAT lists every 500 hours after break-in.
