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The Chevrolet HHR (an initialism for Heritage High Roof) [1] is a retro-styled, high-roofed, five-door, five-passenger, front-wheel drive wagon [2] [3] designed by Bryan Nesbitt and launched by the American automaker Chevrolet [4] at the 2005 Los Angeles Auto Show [citation needed] as a 2006 model.
A wheel cylinder is a component of a hydraulic drum brake system. [1] It is located in each wheel and is usually positioned at the top of the wheel, above the shoes. Its function is to exert force onto the shoes so as to bring them into contact with the drum and stop the vehicle with friction. [2]
Drum brake (upper right) with the drum removed (lower left, inside facing up), on the front of a Ford Falcon Sprint A rear drum brake on a Kawasaki W800 motorcycle. A drum brake is a brake that uses friction caused by a set of shoes or pads that press outward against a rotating bowl-shaped part called a brake drum.
The brakes were controlled from one end of the train. To release the brakes the guard wound up the rod to compress the springs, whereupon they were held off by a single ratchet under his control (although in an emergency the driver could draw on a cord to release the ratchet). When the ratchet was released the springs applied the brakes.
On all pickup trucks, the model line was fitted with front disc brakes and rear drum brakes (4-wheel disc brakes were exclusive to the C3500HD [18]). Anti-lock brakes (ABS) were introduced as part of the redesign. From 1988 to 1994, ABS was used on the rear wheels (on K-Series trucks, only when in two-wheel drive [8]). From 1995 to 2000 ...
During the 1997 model year, the Tahoe was offered with the Z56 police option using suspension components from the discontinued 454SS truck – the first Tahoe Z56s were available only in 2WD until the GMT400 was phased out. The original prototype had rear disc brakes based on the B-body 9C1s whereas the production Z56s came with rear drum brakes.
Four-wheel cast-iron 11-inch drum brakes remained standard but were now wider, for an increase in effective braking area. Sintered-metallic linings, segmented for cooling, were again optional. So were Al-Fin brake drums, which not only provided faster heat dissipation (and thus better fade resistance) but less unsprung weight. [14]
It can be identified by its straight axle tubes, 10 bolt asymmetrical cover, and an "80" cast into the housing. Dana 80's are made as full floating, rear axles only and are a step up in overall strength compared to the Dana 70. 1988 Ford was the first company to use the Dana 80.