Red Seal Heavy Duty Equipment Technician case studies
Red Seal Heavy Duty Equipment Technician · Put your knowledge to work in context.
The Red Seal Heavy Duty Equipment Technician credential is a Canadian interprovincial trade certification for people who diagnose, repair, and maintain heavy mobile equipment such as excavators, dozers, graders, haul trucks, loaders, and cranes. It is written for apprentices completing their technical training and for experienced working technicians who want their skills recognised across provinces and territories. The Red Seal Heavy Duty Equipment Technician case studies are 5 cases and about 4,820 words.
1Burst Boom Hose Over a Frozen Yard Draining to a Creek
At 02:40 on a night shift in an aggregate yard (-9 °C), a 40-tonne excavator's boom hose bursts while the operator is stockpiling. Roughly 50–70 L of ISO VG 46 hydraulic oil sprays over the boom, the engine cover and the frozen gravel below, and the pool is spreading toward a storm drain 12 m away that discharges to a fish-bearing creek.
868 words, about 4 min2Slow 24 V Crank on a Wheel Loader: Batteries or Cables?
An operator reports that a 24 V wheel loader cranks slowly and occasionally fails to start on the first attempt; the problem appeared with cold weather (-5 °C). The machine carries two 12 V, 1,150 CCA batteries in series, both 26 months old.
931 words, about 5 min3Boom Drift Plus Slow Functions on a 22-Tonne Excavator
A 22-tonne excavator with 8,700 h has three complaints from the same operator: the boom drifts down about 150 mm in 10 minutes with the engine off and the oil at 55 °C; the arm and both travel functions are slow; and the hydraulic oil runs about 15 °C hotter than on the identical sister machine. On a calm day the drift is measured with the bucket empty and the arm fully retracted.
1,051 words, about 5 min4Fourth-Gear Flare on a Powershift Haul Truck
A 9,200-hour articulated dump truck with a six-speed powershift transmission flares about 200 rpm and loses ground speed in fourth gear under load on a grade; first through third feel normal. There are no active fault codes, but a stored event reads 'clutch 4 fill time out of range'.
967 words, about 5 min5Coolant Loss With No External Leak on a Tier 4F Loader
A 5,400-hour, six-cylinder turbocharged diesel in a wheel loader (cooled EGR, DOC) loses about 4 L of coolant per 10-hour shift but shows no external leak, no steam and no coolant on the dipstick. Coolant is a fresh-looking 50/50 mix.
1,003 words, about 5 min