NZ CoF Inspector case studies
NZ CoF Inspector · Put your knowledge to work in context.
The New Zealand Certificate of Fitness (CoF) Inspector credential is the authorisation that lets a person inspect and certify heavy vehicles and certain other vehicles for continued road use in New Zealand. It is aimed at experienced automotive technicians and inspection staff who work for inspecting organisations and who need to sign off certificates of fitness rather than warrants of fitness. The NZ CoF Inspector case studies are 5 cases and about 2,273 words.
1Air Brake Pressure Buildup and Leak-Down on a Log Truck
A 2011 8x4 logging truck with a full air system is presented for a Certificate of Fitness. The inspector notes the following during the brake test.
500 words, about 3 min2Cracked Chassis Rail at a Crossmember on a B-train Prime Mover
A 2009 6x4 prime mover used in a B-train configuration is presented for CoF. During the underbody inspection, the inspector finds a crack approximately 40 mm long in the web of the left-hand chassis rail, running vertically from the top flange downward, located directly at the rear crossmember attachment bracket.
444 words, about 2 min3Brake Test on a Light Truck with a Suspect Load-Sensing Valve
A 2015 4x2 light truck (GVM 4,500 kg) is presented for CoF. On the roller brake tester, service brake results are: front axle 62% efficiency, rear axle 38% efficiency, with a left/right imbalance on the rear axle of 24%.
437 words, about 2 min4Inspector Obligations When a Vehicle Fails and the Owner Disputes
An inspector completes a CoF inspection on a 2013 refrigerated box truck. The vehicle fails on three items: a worn steering tie-rod end with excessive play, a non-functioning left rear brake light, and a cracked windscreen in the driver's wiper sweep.
473 words, about 2 min5Fifth Wheel, Coupling and Load Restraint on a Stock Truck
A 2012 6x4 stock truck with a tandem-axle stock trailer is presented for CoF. The inspector finds: the fifth wheel jaws have visible wear and the coupling has noticeable slack when the trailer is rocked; the trailer's safety chain is attached but one link is stretched and deformed; the stock crate has a bent side rail with a sharp protruding edge at head height; and the trailer's rear underrun bar is missing.
419 words, about 2 min