3.25. The sizes of the main interfaced details of the engine and limits of admissible iznos in operation
|
The interfaced details |
The sizes of the interfaced details, mm |
Admissible gap in interface, mm
| |
|
Opening
|
Shaft
| ||
| The piston – the cylinder: | |||
|
Class A |
76,00–76,01 * / 79,0–79,01 |
75,94–75,95 / 78,93–78.94 |
0,15 |
|
Class B |
76,01–76,02 / 79,01–79,02 |
75,95–75,96 / 78,94–78,95 |
0,15 |
|
Class C |
76,02–76,03 / 79,02–79,03 |
75,96–75,97 / 78,95–78,96 |
0,15 |
|
Class D |
76,03–76,04 / 79,03–79,04 |
75,97–75,98 / 78,96–78,97 |
0,15 |
|
Class E |
76,04–76,05 / 79,04–79,05 |
75,98–75,99 / 78,97–78,98 |
0,15 |
|
The piston – a piston finger **: | |||
|
21,982–21,986 |
21,970–21,974 |
– |
|
21,986–21,990 |
21,974–21,978 |
– |
|
21,990–21,960 |
21,970–21,982 |
– |
|
The top head of a rod – a piston finger *** |
21,940–21,960 |
21,970–21,982 |
– |
|
The piston – the top compression ring |
1,535–1,555 (flute width) |
1,478–1,490 (ring height) |
0,15 |
|
The piston – the lower compression ring |
2,015–2.035 (flute width) |
1,978–1,990 (ring height) |
0,15 |
|
The piston – an oil scraper ring |
3,957–3,977 (flute width) |
3,925–3,937 (ring height) |
0,15 |
|
The cylinder – a piston ring (a gap in the lock of rings): | |||
|
0,30–0,45 |
0,30–0,45 |
The compression in the cylinder has to be not less than 10 kgfs/cm 2 |
|
0,25–0,40 |
0,25–0,40 | |
|
The block of cylinders plus radical inserts – a bent shaft |
54,507–54,520+2(1,824–1,831) |
50,775–50,795 |
0,15 |
|
Bent shaft (length of a back neck) – the block of cylinders (width of a back support) plus persistent half rings |
27,975–28,025 |
23,14–23,20+2(2,31–2,36) |
0,35 |
|
Rod plus connecting rods – a bent shaft |
51,330–51,346+2(1,723–1,730) |
47,814–47,834 |
0,1 |
|
The case of bearings of the camshaft – the camshaft: | |||
|
46,000–46,025 |
45,915–45,931 |
0,2 |
|
45,700–45,725 |
45,615–45,631 |
0,2 |
|
45,400–45,425 |
45,315–45,331 |
0,2 |
|
45,100–45,125 |
45,015–45,031 |
0,2 |
|
43,500–43,525 |
43,415–43,431 |
0,2 |
|
The directing plug – the inlet valve |
8,022–8,040 |
7,985–8,000 |
0,15 |
|
The directing plug – the final valve |
8,029–8,047 |
7,985–8,000 |
0,15 |
|
The roller of the drive of auxiliary units – the forward plug |
48,084–48,104 |
48,013–48,038 |
0,15 |
|
The roller of the drive of auxiliary units – the back plug |
22,00–22,02 |
21,94–21,96 |
0,15 |
|
Gear wheel of the drive of the oil pump – the plug |
16,016–16,037 |
15,970–15,985 |
0,15 |
|
The case of the oil pump – a gear wheel: | |||
|
30,055–30,117 | 29,956–29,989
|
0,2 |
|
34,08–34,12 | 33,940–33,970
|
0,25 |
* In numerator – for the engine 2103, in a denominator – for 2106. Since 1988 on engines 2106 diameter of the piston is increased by 0,01 mm in comparison with specified in the table.
** The greased piston finger at admissible wear should not drop out on lugs if to keep it in the piston vertically.
*** At admissible wear slipping of a finger under load of 400 kgfs is not allowed.