3.3.14. Radical bearings and bearings of rods
Causes of wear of bearings
| 1. Decrease in strength of metal; fragmentary scratches 2. It is incorrectly put; the bright (polished) strips 3. It is scratched by dirt; dirt ate in a surface |
4. Lack of oil; the top layer was wiped 5. Excessive wear; the top layer was wiped on all surface 6. The bearing is deformed; the top layer was wiped around |
In spite of the fact that at an engine partition old inserts of bearings are replaced with new, it is necessary to examine old inserts carefully. Survey of an insert can establish the reason of its wear.
Damage of bearings happens because of a lack of lubricant, availability of dirt and other foreign debris, an overload of the engine and corrosion. Anyway, the cause of damage of bearings needs to be removed prior to assembly of the engine.
Selection of inserts
For the correct selection of inserts be guided by the size of a lubricant gap which can be measured by means of a plastic measuring tape. At emergence of any problems with selection of inserts address experts.
Radical bearings
Sizes necessary for determination of thickness of inserts of radical bearings (4-cylinder engines)
| The sizes of radical bearings for 4-cylinder engines are beaten out on the joined surface of the oil pallet and on the block of cylinders (A), the sizes of necks of radical bearings are beaten out on a counterbalance of a bent shaft (B). In 6-cylinder engines the sizes of bearings are beaten out on the block of cylinders over a bent shaft, and the sizes of necks of bearings are beaten out on the first counterbalance of a bent shaft. |
Having put the corresponding numbers on the block and on a bent shaft, you receive the necessary size of an insert for the four-cylinder engine. To pick up inserts for six-cylinder engines use the table.
|
Sum
| |||||
| Figure on the block of cylinders (A) plus figure on a bent shaft (B) |
0 – 5
|
6 – 11
|
12 – 17
|
18 – 23
|
24 – 28
|
| Use N insert |
3
|
4
|
5
|
6
|
7
|
Example: Figure on the block of cylinders 06 + figure on a bent shaft 08 in the sum give 14 – use N5 insert.