ASE H8 Preventive Maintenance & Inspection (Transit Bus) case studies
ASE H8 Preventive Maintenance & Inspection (Transit Bus) · Put your knowledge to work in context.
This page is an independent study companion for the ASE H8 Preventive Maintenance and Inspection (Transit Bus) certification test. Important: when we retrieved the official ASE H8 page on 2026-10-31 it returned a "Page not found" error, so we could not verify the test's item count, time limit, fee, passing score, retake rules, or recertification policy. The ASE H8 Preventive Maintenance & Inspection (Transit Bus) case studies are 5 cases and about 4,066 words.
1Low-Air Complaint on a High-Mileage Low-Floor Bus
A 2017 40-foot low-floor transit bus, 318,000 miles, comes off a late pull-in with the low-air telltale lit and the buzzer sounding at idle. The operator says the light came on twice during the shift and cleared each time he revved the engine.
778 words, about 4 min2Coolant Loss With No Puddle
A 2015 40-foot bus with an 8.9L diesel, 297,000 miles, has used about 1 gallon of coolant every 450 miles for three weeks. There is no puddle under the bus and the pressure cap holds.
788 words, about 4 min3Every-Third-Morning No-Crank on a 12-Volt Dual-Battery Bus
A 2019 40-foot bus with two group 31 AGM batteries (950 CCA, 100 Ah each), a 270-amp alternator, and 186,000 miles will not crank on roughly every third cool morning. The operator jump-starts it and it runs fine the rest of the day.
817 words, about 4 min4PMI Findings on the Steer Axle
During a 6,000-mile PMI on a 2016 40-foot bus at 265,000 miles, the technician records: right front tire 3/32 inch at the outer shoulder with feathered tread edges; left front 8/32 inch with a flat spot; right front air spring leaking at the upper bead plate under soap test; two right steer-axle lug nuts found below torque with rust streaking from the chamfer; drag link ball stud play measured at 1/8 inch against an OEM maximum of 1/16 inch; steering wheel 20 degrees off center while tracking straight; and the J1939 history shows a right front ABS wheel-speed fault logged on 14 of the last 30 days. Tire date codes are 2019 right front and 2021 left front, same size and model.
834 words, about 4 min5Warm Air on an 88-Degree Day
A 2018 40-foot bus at 202,000 miles is written up for warm air on an 88 F day. With manifold gauges connected at 1,500 engine rpm, the compressor clutch engaged and the condenser fan running, readings are 58 psi low side and 155 psi high side.
849 words, about 4 min