If you're talking about the P/S cooler, I run one on everything I use off road. Learned that lesson on 24hrs on the Hammers, an ARB sponsored
event around 1998ish. We ran our ARCA 2F FJ40 with a Saginaw conversion. There were 30 some trucks, all makes. The object was to continuously run all
the Hammers back to back until the seven Hammers that existed at the time were complete. Best time wins. Jason Bunch took first. I don't remember second. Pat Gremillion ( Pull Pal and Premier Power Welder ) took third and we took fourth. With just what was in the pump reservoir, we boiled it over by the second
trail. We had two extra quarts of p/s fluid and 4 quarts of motor oil. By the sixth trail we'd gone through all the P/S fluid and the motor oil, keeping the power steering working so we could turn the 38" Swampers. The last trail was run with water in the reservoir. It got us through, maybe cost us a position, but we finished in 4 1/2 hours. After 24 hours a third to half the trucks were still on the trail. When we got back home I built a one gallon reservoir for the power steering. Never boiled over again in any event.
It's not just an issue with competition rigs where you're pushing to the limit. I boiled over my stock 60 system on the John Bull trail.
