CLASSIC MACHINES
An early International 433 on test at IH’s proving ground in Arizona. It is fitted with a Pay Mate loading attachment. Early 433s had the headlights mounted low down just above the bumper.
Compared to previous International scrapers, the 400 series machines looked quite angular in appearance with most of the body panels being flat or squared off. This cut down the cost of manufacturing considerably with very few compound curves to worry about. The bowl held 14 cubic yards struck and 21 cubic yards heaped and was equipped with 4-section reversible and interchangeable cutting edges. Two vertically mounted double-acting hydraulic cylinders attached directly from the top of the gooseneck to the bowl spreader bar to provide lift and cutting edge penetration. These produced some 28 tons of down force. Ejection was bulldozer style, powered by two double-acting hydraulic cylinders. A bowl spill-guard was fitted as standard equipment and helped prevent spillage of large chunks of earth or ‘tombstones’ falling over the back of the bowl onto the rear engine enclosure and fuel tank. Compared to some of International’s previous scraper offerings, the 433 had very good visibility all round, even the exhaust stack and aircleaner inlet being set back to allow the operator a better uninterrupted view to the right. An instrument panel was set to the right of the steering column and contained all the necessary gauges and also included a tachometer. A smaller panel containing the rear engine’s gauges was set inside the rear left hand side cowl of the scraper unit. The 433 was usually delivered with a Bostrom air suspension seat and an open, non-ROPS cab with windshield wiper as standard equipment.A full ROPS air-conditioned cab was available as an option for colder climates. The 433s could also be supplied with International’s “Pay Mate” dual loading system. This allowed two 433s to load each other without the use of a separate push tractor similar to Caterpillar’s “Push-Pull” and Terex’s “Twin-Hitch” systems. Pay Mate was factory installed and could not be retrofitted to existing machines as reinforcement was required to the machine’s frame. At the rear the scraper’s push block, which contained the Pay Mate hook, was extended and a substantial radiator guard for the rear engine was installed.
scrapers in his spread. The 433s appear to have changed hands a couple of times subsequently and it is not known if they are still operational or even in New Zealand. Can any of our readers fill in the blanks?
For the model collector n
Only one model of International’s 433 has been produced. This is to 1:25th scale and manufactured by First Gear. n It is of exceptionally good quality, very accurate and fully functional with very little missing from the model other than oil leaks and an operator! n The model has been issued with a couple of variations since its first release in 2004 – a limited run ‘mining white’ version, a gold plated example, and as a very rare matched pair equipped with IH’s Pay Mate dual machine loading system. An impressive model worth adding to any large scale collection. n
The New Zealand connection As far as the author is aware there were only two 433 scrapers imported by International-Harvester New Zealand. Both were delivered new to John McLaughlin Ltd, an established IH user who already had some IH E211 elevating 42 AUGUST 2012 CONTRACTOR
One of John McLachlin’s two International 433s at work on a housing subdivision just north of Johnsonville, Wellington, 1974. It is fitted with Pay Mate gear and an extension to the top of the apron to prevent chunks of material fouling the bowl lift cylinders. Your author did a couple of rounds on this machine and found it very nice to operate.