University of Kentucky – Hydraulics
Event: 2025 IQS
Category: Safety B
Subcategory: Hydraulics
This table shows this tractor’s tech status for each rule in this subcategory. Click a rule number to see the rule-specific detail page.
| Rule # | Description | Status |
|---|---|---|
| (Sec 7.10.4) | All test ports and components necessary for the pressure checking must remain on the vehicle at all times. (Sec 7.10.4) | Pass |
| (Sec 1.5) | For all questions about the rules please contact the Competition Rules Chair (Sec 1.5) | Pass |
| (Sec 1.5.1) | Kent Thoreson, kthoreson@vermeer.com (Sec 1.5.1) | Pass |
| (Sec 7.5) | The maximum system working pressure allowed for hydraulic systems on a vehicle is 4,000 + 50 psi (276 + 3.4 bar). (Sec 7.5) | Pass |
| (Sec 7.5.1) | Maximum pressure must be controlled by a relief valve, and (Sec 7.5.1) | Pass |
| (Sec 7.5.1.1) | It must be set equal to or less than the lowest intermittent pressure rating of any component in the system. (Sec 7.5.1.1) | Pass |
| (Sec 7.5.2) | Non-powered brake and steering system are exempt. (Sec 7.5.2) | Pass |
| (Sec 7.6) | Hydraulic hoses, tubes, and fittings must be rated for the corresponding system working pressure. (Sec 7.6) | Pass |
| (Sec 7.6.1) | Hoses must be clearly marked with the OEM working pressure rating. (Sec 7.6.1) | Pass |
| (Sec 7.7) | Pipe thread fittings are only allowed on pump suction lines, tank sight gages, or OEM components (i.e. hydraulic cylinder, hand powered steering pump, etc.). (Sec 7.7) | Pass |
| (Sec 7.7.1) | The hydraulic line attached to the OEM component port may ONLY utilize a pipe thread fitting to make the connection at the OEM component, unless the connection at the other end meets the exceptions defined by this rule. (Sec 7.7.1) | Pass |
| (Sec 7.7.2) | Note: OEM (Original Equipment Manufacturer) components are defined as components sourced from another completed product (a direct component supplier is not an OEM). (Sec 7.7.2) | Pass |
| (Sec 7.7.2.1) | For an OEM component with pipe thread fittings to be accepted for use at competition, documentation from the equipment manufacturer must be provided for the component to show it is rated for the working pressure of the vehicle’s hydraulic system. This documentation must be submitted with the documentation required in rule 7.13. (Sec 7.7.2.1) | Pass |
| (Sec 7.8) | Hose clamps are only acceptable on pump suction lines and tank sight gages. (Sec 7.8) | Pass |
| (Sec 7.9) | Components, regardless of system pressure, may not be welded or braised with the exception of pump suction lines or a reservoir. (Sec 7.9) | Pass |
| (Sec 7.10) | A method for checking the system pressures must also be considered. The vehicle must meet the following requirements. (Sec 7.10) | Pass |
| (Sec 7.10.1) | Non-powered brake and steering system are exempt (Sec 7.10.1) | Pass |
| (Sec 7.10.2) | An easily accessible test port, meeting SAE J1502, must be present at the high-pressure side of the pump in each separate circuit. (Sec 7.10.2) | Pass |
| (Sec 7.10.3) | The vehicle must provide a means (i.e. ball valves, solenoid valves, needle valves, blockers, lockouts) for all system pressures to be tested without having to install external hardware into the systems during technical inspection. (Sec 7.10.3) | Pass |
| (Sec 7.11) | Hydraulic lines must be located and routed robustly and must meet the following requirements: (Sec 7.11) | Pass |
| (Sec 7.11.1) | ALL exposed hoses during normal operation must be completely covered with a protective hose covering or continuous shielding. (Sec 7.11.1) | Pass |
| (Sec 7.11.2) | Are not subject to damage from debris or from installing or removing adjacent components (Sec 7.11.2) | Pass |
| (Sec 7.11.3) | Prevent operator contact when mounting or dismounting the operator station. (Sec 7.11.3) | Pass |
| (Sec 7.11.4) | Must not rub any sharp edges or are properly guarded where damage may result. (Sec 7.11.4) | Pass |
| (Sec 7.11.5) | Have a mechanism (clip/clamp intended for hydraulic use) to guide multiple hoses through their range of motion to prevent fouling (rubbing) or abrasive action. (Sec 7.11.5) | Pass |
| (Sec 7.12) | Fasteners for hydraulic lines must be designed to withstand the line movement caused by pressure fluctuations in the system. (Sec 7.12) | Pass |
| (Sec 7.13) | A unitized hydro (Combined pump/motor in common case, no external high pressure line) is allowed as long as: (Sec 7.13) | Pass |
| (Sec 7.13.1) | Schematic and component specifications are submitted (Sec 7.13.1) | Pass |
| (Sec 7.13.2) | Original settings are maintained for pressure limiters/relief valves (Sec 7.13.2) | Pass |
| (Sec 7.13.3) | Any external, high pressure plumbing (charge/cooler/steering/etc.) will need to be checked (Sec 7.13.3) | Pass |
| (Sec 7.14) | If a hydraulic system is used on the vehicle, some additional pre-competition requirements are to be met. The team must provide the following to the rules chair, identified in Section 1.5, by the last Friday in March: (Sec 7.14) | Pass |
| (Sec 7.14.1) | Hydraulic system schematic (Sec 7.14.1) | Pass |
| (Sec 7.14.1.1) | The schematic must include system components (tank, pumps, valves, motors, relief valves, check valves, test ports, etc.) drawn with standard symbols (refer to ISO 1219), as well as specifications pertaining to those components that dictate system operating characteristics (relief valve setting, flow from a pump, check valve ratings, orifice diameters, pump speed ratio, etc.). See example in Figure 4, below. (Sec 7.14.1.1) | Pass |
| (Sec 7.14.1.2) | Component list with factory specified pressure ratings, see example in Figure 4, below. (Sec 7.14.1.2) | Pass |
| (Sec 7.14.1.3) | If not received by the above stated date, the team will not be eligible for "First Time Through" award for tech inspections. (Sec 7.14.1.3) | Pass |
| (Sec 7.14.1.4) | Any changes after the due date must be submitted to the rules chair, identified in Section 1.5, immediately. Unpowered hydraulic steering systems do not require this (Sec 7.14.1.4) | Pass |