Construction Plant Fitting case studies
Construction Plant Fitting · Put your knowledge to work in context.
Construction Plant Fitting is a vocational trade area concerned with the installation, assembly, maintenance and repair of the mechanical, hydraulic and structural systems found on construction machinery - excavators, telehandlers, dumpers, rollers, crushers and similar site equipment. Candidates for this credential are typically apprentices, trainee plant fitters and experienced operatives in the plant-hire, civil engineering and groundworks sectors who want their competence recognised and their career pathway formalised. The Construction Plant Fitting case studies are 5 cases and about 3,048 words.
1Boom drift on a 22-tonne excavator
A 22-tonne hydraulic excavator (8,600 h) is on a residential groundworks site. The operator reports that with the engine stopped, oil at 55 °C and the boom raised about 1.2 m, the boom settles 35–45 mm in five minutes.
649 words, about 3 min2Torque converter overheating on a loaded grade
An articulated dump truck (40 t payload, 12,400 h) is hauling 36 t of wet clay up a 12% grade 1.8 km long. After six minutes on the grade the torque converter oil temperature reaches 122 °C and the dash warning illuminates; on the flat it stabilises at 95 °C.
612 words, about 3 min3Wire rope inspection before a critical lift
During a pre-lift inspection of a 50 t crawler crane, a 24 mm 6×36 IWRC main hoist rope (4,200 h, 8 years) is found to have seven broken wires within one 144 mm lay length (6d). Three of the breaks are in valleys between strands and two are adjacent to a single strand.
615 words, about 3 min4Nuisance RCD tripping on a generator-supplied compound
A 500 kVA diesel generator supplies a site compound through a 400 A distribution board. The alternator star point is bonded to the generator frame and to a local earth electrode (3.2 Ω).
567 words, about 3 min5Outrigger hose repair on a concrete pump
A 37 m concrete pump is on a high-rise site. The outrigger hydraulic hose bursts while the boom is being unfolded; 60 L of oil is lost and the reservoir sight glass is below minimum.
605 words, about 3 min