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|OE NO:||45390-26050 45390-26041||Car Model:||TOYOTA|
steering drive shaft,
steering universal joint
Steering Knuckle for Toyota Hiace 45390-26050 45390-26041
Part Name : steering shaft
Applicable Models : TOYOTA HIACE LH13(19)
OEM NO.: 45390-26050 45390-26041
The steering shaft universal joint coupling, or simply steering u-joint is a small but important part of the steering system. In most cars with an intermediate steering shaft, there are two u-joint couplings. The top u-joint connects the intermediate shaft to the steering column. The lower u-joint connects the intermediate shaft to the steering rack, see the diagram. To accommodate the steering tilt and telescope function, as well as for crash safety, the steering shaft u-joint must rotate at an angle.
The steering shaft u-joint must transfer the steering force from the steering wheel to the steering rack at an angle, without resistance or play. A faulty u-joint can cause looseness or seizing felt in the steering wheel. A vehicle with a bad steering u-joint is unsafe to drive.
A collapsible steering column is a mechanism that is used to transfer energy from the steering wheel into the steering gear box, which transfers energy to turn the wheels of a vehicle. Though the designs for steering columns have varied since their inception, a typical collapsible steering column looks like two interlocking shafts that attach directly to the steering wheel and the steering gear box. The steering column is the shaft directly under the steering wheel in which the ignition and automatic shift levers are often located.
When the steering column was first invented, it consisted of a single, long, steel rod connecting the steering wheel to the steering gear box. While this single-piece construction was efficient, and effective in controlling the vehicle, it soon became apparent that its design was unsafe in frontal collisions. Under the single-piece system, when such an impact occurred, the steering column would often impale the driver as it was rammed toward the rear of the vehicle. The unsafe attributes of single-piece steering columns called for the invention of a safer steering column design, which is why Bela Barenyi designed the collapsible steering column to replace it. The safely enhanced construction of the collapsible steering column, no matter which design is used, absorbs, rather than transfers, frontal impact energy by collapsing or breaking upon impact. In this way, drivers involved in frontal impact collisions are able to avoid the dangers of non-collapsible steering parts.
Collapsible steering columns still consist of a long shaft that connects the steering wheel to the steering gear box. However, the collapsible design is composed of an inner and an outer sleeve, pressed tightly together with a number of steel bearings in between. These steel bearings are pressed into the metal sleeves, and are held in place with a strong safety resin, which is designed to harden and then shatter when a specific level of pressure is applied. In the event of a frontal impact, the steel bearings
The steering shaft u-joint must transfer the steering
force from the steering wheel to the steering rack at an angle, without
resistance or play. A faulty u-joint can cause looseness or seizing felt i
n the steering wheel. A vehicle with a bad steering u-joint is unsafe to drive.
How easy is it to replace the steering u-joint?
In most cars, it's not very difficult, although the u-joint is often seized on the shaft and might be difficult to remove. In some cars, it's important to mark the steering u-joint position on the steering rack shaft and the intermediate shaft splines, as the new u-joint must be positioned in the same way. In some cars, the u-joint must be replaced with the shaft. It's best to consult the service manual for the vehicle for the proper repair procedure.
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