What does the tractor protection valve do? Question What does the tractor protection valve do? Answers Protects the tractor from being stolen Protects the tractor from exceeding a set speed Keeps air in the braking system, should the trailer break away or develop a leak Ensures oil adequately lubricates the engine Explanation The tractor protection valve keeps air in the tractor or truck braking system, should the trailer break away or develop a bad leak. This questions appears in the following tests: Indiana Combination Mississippi Combination Nebraska Combination Nebraska Combination New Jersey Combination Tennessee Combination Wyoming Combination
