The truck was driven around the test track three times, traveling approximately 14.4 km (9 mi) during the test.
The two thimbles holding the wheels on for this test, fell off just before the first turn at approximately 60 km/h (40 mph). While going around the corner, the wheels came off the studs. The rim started making contact with the hub and the outside tire made contact with the outside bar. Smoke was produced as shown in FIGURE 16.
FIGURE 17 shows the scuffing on the tire from contact with the retaining device. It also shows the damage done to the inside of the wheel rim, where all of the material back to the bolt holes was ripped off.
FIGURE 18 shows that sufficient fore-aft movement existed to allow contact between the tire tread and the bolt head connecting the brace to the rear member.
The outside tire went flat. Unexpectedly, the two stud bolts that were left on the hub were intact at the end of the test. The bolts retaining the hub cap were broken and the hub cap came off. A combination of factors also caused the outside wheel bearing to seize and come apart.
The wheel retention device held the wheel in place. One bolt, holding the rear brace on came loose because of insufficient tightening. This allowed some vibration of the device to occur.
本文转自：China Industry News