Saskatchewan Air Brake case studies
Saskatchewan Air Brake · Put your knowledge to work in context.
The Saskatchewan Air Brake Endorsement is the credential a driver adds to a Saskatchewan licence in order to legally operate a vehicle equipped with an air brake system - typically heavy trucks, tractor-trailers, buses and other commercial vehicles covered by Classes 1, 2 and 3. Because air brakes behave very differently from hydraulic brakes, the endorsement is treated as a separate knowledge requirement rather than something absorbed into general driving study. The Saskatchewan Air Brake case studies are 5 cases and about 3,117 words.
1Cold-Start Build-Up and Governor Behaviour on a Grain Truck
A 2013 tandem-axle grain truck with a 12.0 L diesel and a single-cylinder compressor has been parked outside overnight at -28°C near Yorkton. The driver drains both wet and dry tanks, finding about a cup of water and milky emulsion from the wet tank.
553 words, about 3 min2Pre-Trip Leak Test on a Tractor-Trailer
A driver is doing a pre-trip on a 2016 three-axle tractor and a tandem-axle van trailer at a Saskatoon yard at +5°C. After building to 120 psi and shutting down, the driver releases the parking brake, waits one minute, and records a drop from 120 to 116 psi over the next minute.
677 words, about 3 min3Loaded Grain Trailer on a Steep Prairie Grade
A 2018 tractor with a tandem-axle end-dump grain trailer is descending a 7% grade into the Qu'Appelle Valley, grossing 39,500 kg. The driver selected a gear that lets the engine hold about 1,900 rpm, but the truck is still accelerating.
625 words, about 3 min4Automatic Slack Adjuster That Will Not Hold Adjustment
A 2015 highway tractor with automatic slack adjusters on the front and rear axles comes in with a complaint of a hot right rear drum and a pull to the right when braking. The right rear Type 30 chamber has a pushrod stroke of 2 3/4 inches (70 mm) with the brakes applied at 100 psi; the left rear is 2 1/4 inches (57 mm).
646 words, about 3 min5After a Brake Job: Adjustment and Balance on a Tandem Axle
A shop has just replaced the rear brake shoes and drums on a 2012 tandem-axle dump truck. The truck has manual slack adjusters and Type 20 clamp-type chambers on both rear axles.
616 words, about 3 min