Okla. Admin. Code § 730:50-7-4

Current through Vol. 42, No. 3, October 15, 2024

Section 730:50-7-4 - Equipment requirements

Each licensee shall insure that the operation of special combination vehicles complies with the following rules in addition to other equipment requirements established by state or federal laws or rules:

(1)Power. All truck-tractors shall be powered to provide adequate acceleration and hill climbing ability under normal operating conditions, and to operate on level grades at speeds compatible with other traffic. The ability to maintain a minimum speed of 40 mph under normal operating conditions on any grade over which the combination is operated is required.

(2)Traction. All truck-tractors shall have adequate traction to maintain a minimum speed of 20 mph under normal operating conditions on any grade over which the combination is operated and to be able to resume a speed of 20 mph after stopping on any such grade and, except in extreme road or weather conditions, to negotiate at any speed all grades encountered.

(3)Tires. Stiff sidewall tires are recommended. Adequate tread and safe condition is required.

(4)Fifth wheel. A heavy duty fifth wheel is required. All fifth wheels must be clean and lubricated with a light duty grease at all times while operating in this state.

(5)Pick-up plates. Pick-up plates must be of equal strength to the fifth wheel.

(6)King pin. The kingpin must be of a solid type and permanently fastened. Screw out or folding type kingpins are prohibited.

(7)Pintle hook and eye. All hitch connections must be of a no-slack type, preferably air actuated ram. Air actuated hitches which are isolated from the primary air transmission system are recommended.

(8)Drawbar. The length of the drawbars (a beam which serves as a point of connection for some trailers) shall be consistent with the clearance required between trailers for turning and backing maneuvers.

(9)Axles. Axles must be those designed for the width of the body.

(10)Brakes. All braking systems must comply with state and federal requirements. In addition, fast air transmission and release valves must be provided on all trailers, semi-trailers and converter dolly axles. A brake force limiting valve, sometimes called a "slippery road" valve may be provided on the steering axle if Federal Motor Carrier Safety regulations would so allow. Indiscriminate use of engine retarder brakes is prohibited.

(11)Mud flaps or splash guards. As required by state law. [47 O.S. §12-405.3]

Okla. Admin. Code § 730:50-7-4

Adopted by Oklahoma Register, Volume 40, Issue 24, September 1, 2023, eff. 9/11/2023