ASE T5 Suspension & Steering (Medium/Heavy Truck) case studies
ASE T5 Suspension & Steering (Medium/Heavy Truck) · Put your knowledge to work in context.
ASE T5, formally the Medium-Heavy Truck Suspension and Steering certification, is one of the ASE truck series credentials that identifies a technician as competent in the systems that keep a commercial vehicle tracking straight, riding correctly, and coupling safely. It is aimed at working technicians in fleet shops, dealerships, and independent garages who service Class 3 through Class 8 trucks, plus vocational students preparing to enter those roles. The ASE T5 Suspension & Steering (Medium/Heavy Truck) case studies are 6 cases and about 4,039 words.
12.5 Inches of Free Play on a High-Mileage Tractor
2014 Class 8 tractor, 13,200 lb steer axle, integral power steering gear, 780,000 miles. The driver reports highway wander and 2.5 in of free play measured at the rim of a 20 in steering wheel.
707 words, about 4 min2Rear Air Suspension: Correct Average Height, One Inch Split
2018 tandem-drive tractor, 46,000 lb rear GAWR, four-bag rear air suspension with one height control valve per axle feeding both bags through a tee. The driver says the left rear sits low in the morning and the suspension takes about four minutes to come up; there is a faint hiss at the left rear.
665 words, about 3 min3Off-Center Steering Wheel, Right Pull, and a Thrust Angle
2016 6x4 tractor, 240 in wheelbase, 13,200 lb steer axle with a solid I-beam, single drag link, and tie rod with 14 threads per inch on the adjusting sleeve. Complaint: the steering wheel sits 25° right of center going straight, the truck pulls right, and the left front tire shows feathered tread.
674 words, about 3 min4Load, Inflation, and a Mismatched Dual Pair
Class 7 straight truck, 12,000 lb front axle, 21,000 lb rear axle with duals. Tires are 11R22.5 load range G, currently all at 100 psi cold.
665 words, about 3 min5Fifth Wheel Clunk and a Frame Rail Crack
2015 day-cab tractor, 48 in fifth wheel on a slider, 250,000 miles. The driver reports a clunk on acceleration and braking and says the trailer 'walks' the tractor.
674 words, about 3 min6Air Cab Suspension: One Inch Low and Bottoming Out
2019 conventional cab tractor with air cab suspension: two bags at the rear of the cab fed through a tee from one height control valve, plus two cab shocks. The driver complains the cab bottoms out on bridge joints and that the left rear corner of the cab sits low.
654 words, about 3 min