“CROSSROADS” OF THE DRIVING SHAFT
Arriving at the store to buy a universal joint shaft for a VAZ car, you can see three types of them on the counter - “small”, “medium” and “large”.
Our correspondent Sergei MISHIN received advice on their use in the chassis finishing department of the VAZ Scientific and Technical Center.
To begin with, the cars that are leaving the factory gates today have crosses made at VAZ under the license of the German company Ina.
On all “Lada” “fifth” crosses are used (the catalog number of the hinge is 2105–2202025), which replaced the old “first zero” (2101–2202025) in mid-1987. But both of them go to spare parts, both separately and with a driveshaft.
What is the difference between a new cross and an old one? Despite the same external dimensions (the outer diameter of the bearing and the center distance), there are many differences. Firstly, the “fifth” crosspiece has a tenon diameter that is approximately two millimeters larger than that of the “first” one. More and the number of needles in the bearing, although their diameter is smaller. These changes allowed to reduce the specific load in the bearing, which made it more durable. By the way, the bearing housings of the new cross are stamped, not turned, like the old.
Secondly, the new cross has a fundamentally different bearing seal - it protects against dirt much more reliably. This is done again to increase durability.
Thirdly, the lubricant supply from the tenon hole to the bearing is more evenly organized due to the use of special plastic spacers in each tenon, which have three radial channels (at an angle of 120 degrees to each other) for supplying grease to the needles.
From all this, it becomes clear that bearings from the “first” will not fit the spike of the “fifth” crosspiece, and vice versa. So when buying bearings separately from the crosspiece, this must be borne in mind.
CROSSES FOR "NIVA"
“Niva” since 1987 are also produced with their own original cross. Its most serious differences from the “classical” one are the increased sizes and the availability of a grease fitting.
This crosspiece has a catalog number 21211–2202025. The outer diameter of its bearing is slightly more than 28 millimeters, so even if it is without a grease fitting (which should not be), it is impossible to confuse it with the "classic" one. Naturally, this crosspiece is not interchangeable with the two previous ones. It differs fundamentally from the “fifth” double bearing seal. Taking this opportunity, we recall that it is necessary to syringe crosses every 10 thousand km of run. Grease 158 is best suited for these purposes. You can also use Fiol-2U, but the latter is available in very limited quantities.
Having received information about the VAZ crosses, we also learned that there are