---
kind: "section"
citation: "46 C.F.R. § 58.30-10"
title: "46"
number: "58.30-10"
heading: "Hydraulic fluid."
url: "https://uscodex.org/cfr/46/58.30-10"
---

# §58.30-10. Hydraulic fluid.

- (a) The requirements of this section are applicable to all fluid power transmission and control systems installed on vessels subject to inspection.
- (b) The fluid used in hydraulic power transmission systems must have a flashpoint of not less than 200 °F for pressures below 150 psig and 315 °F for pressures 150 psig and above, as determined by ASTM D92 (incorporated by reference, see [§ 58.03-1](/cfr/46/58.03-1.md)), Cleveland “Open Cup” test method.
- (c) The chemical and physical properties of the hydraulic fluid must be suitable for use with any materials in the system or components thereof.
- (d) The hydraulic fluid must be suitable for operation of the hydraulic system through the entire temperature range to which it may be subjected in service.
- (e) The recommendations of the system component manufacturers must be considered in the selection and use of hydraulic fluid.

## Notes

### Source

Source: USCG-2020-0634, 89 FR 50179, June 12, 2024, unless otherwise noted.

### Authority

Authority: 43 U.S.C. 1333; 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation No. 00170.1, Revision No. 01.4.

### Source

Source: CGFR 68-82, 33 FR 18878, Dec. 18, 1968, unless otherwise noted.