Интернаука №16 (часть3) 2020 - [29]

№ 16 (145), часть 3, 2020 г.

Serviceability Limit Reliability

79,4

9

Front axle

16

1035

4.7

25.9

534,726.4

4.3

13368.2

10 Rear axle

27

1094

5,0

27.4

571,869.7

4.6

14,296.7

11 Steering

7

802

3.6

20.1

468,990.8

3,7

11724.8

Fuel system

12

22

499

2,3

12.5

385,402.4

3,1

9635.1

Fuel pump

13 Compressor

fifteen

621

2,8

15,5

328,116.7

2.6

8202.9

14 Cardan drive

2

46

0.2

1,2

43055.8

0.3

1076.4

Electrical

15 equipmente

12

1558

7.1

39.0

196674,2

1,6

4916.9

Body

16 Engine mount

4

200

0.9

5

74,597.7

0.6

1864,943

Total

251

21974

100

549.3

12512442.1

100

312811,1

Source: calculated by the author based on data from

For

example , for reliability of

the

en-

the Mercedes-Benz service in Tashkent

gine I ( (table № 4) on the reliability of the engine cool-

Reliability and maintainability indicators were de-

ing system ( (table № 5)

termined for all units of Mercedes-Benz O 405 buses, at

a range of 0 ÷ 1250 thousand km .

Table 4.

Engine Reliability

The

ce

ht,

Total

s

amount of

Name kt s and

er

s ,

it

un

Number

costs on Spare

ic

rt

if

costs per

No.

details s /

te

weig

ht%

un

of failures

parts to the elimi-

l bo

ra

ic

%

ec

bus ,

Detail number

pa

Numb

if

of

in

ta

per bus

nation of failures ,

Sp

o

ec

weig

thousand

T

thousand soums

Sp

soums

Sleeve , piston

1

group A 447 030

6

347

18.6

8.7

215447.6

29.1

5386.2

09 37

2

Insert kit t

6

520

27.9

13.0

107144.4

14.5

2678.6

Piston ring A

3

6

347

18.6

8.7

87025,2

11.8

2175.6

422 030 01 24

Reliability-limited reliability

65.1

Cylinder block A

4

1

6

0.3

0.2

72,577.4

9.8

1814.4

447 010 07 08

Crankshaft A

5

1

17

0.9

0.4

58815.2

8

1470.4

496 030 02 01

Serviceability Limit Reliability

73.2

Camshaft

6

1

25

1.3

0.6

62840.3

8.5

1571.0

A 447 050 11 01

Connecting Rod A

7

6

132

7.1

3.3

54043,7

7.3

1351.1

447 030 04 20

Set gasket set A

8

1

79

4.3

2.0

35871.6

4.8

896.8

427 010 00 05

Oil pump A

9

2

31

1.7

0.8

19321.8

2.6

483.0

403 180 27 01

Inlet and outlet

10

valve A 442 050 05

12

336

18.1

8.4

14127.4

1.9

353.2

26

Oil cooler A

11

1

13

1.7

0.3

8383.7

1,1

209.6

001 188 31 01

Cylinder head A

12

6

8

0.4

0.2

4027.2

0.5

100.7

447 010 01 20

1861

100

46.5

739 625.6

100

18,490.6

37

Журнал «Интернаука»

№ 16 (145), часть 3, 2020 г.

Source: calculated by the author based on data from

the Mercedes-Benz service in Tashkent

Table 5.

Indicators system reliability s engine cooling

Total

The

f

ce

ht,

o

s

Number

costs

amount of

un

ic

Name details s /

er

s

it

of fail-

app. failure

if

costs per

No.

rt

te

weig

ht%

detail number

un

l bo

ic

%

ec

pa

ra

ures per

repair parts ,

bus ,

in

ta

if

Sp

Numb

o

ec

bus

thousand

weig

thousand

T

Sp

soums

soums

water pump rem. set

1

1

225

12,2

5,6

166804.6

21.6

4170.1

A.403.200.73.01

rem. set of water pump

2

1

225

12,2

5,6

96149.3

12.5

2,403.7

A.422.200.06.04

set of laying wa-

3

1

433

23.5

10.8

86123.6

11.2

2153.1

ter. A.422.200.09.01 pump

Fan belt kit L 1125 A 005 997

4

1

200

10.8

5,0

20090.4

2.6

502.3

17 92

Reliability-limited reliability

58.7

radiator system cooling ICE A

5

1

34

1.8

0.9

100045.6

13.0

2501.1

671 501 March 1

6

thermostat A.005.203.26.75

1

40

2.2

1,0

2793.4

0.4

69.8

7

viscose fan A 002 205 65 06

1

40

2.2

1,0

96,425.2

12.5

2410.6

expansion tank / assembly A

8

1

40

2.2

1,0

44,549.3

5.8

1113.7

629 500 00 49

Serviceability Limit Reliability

76.6

viscose fan shaft

9

1

40

2.2

1,0

22392.4

2.9

559.8

A 301 205 00 02

viscose fan bearing

10

1

40

2.2

1,0

26163.4

3.4

654.1

A 005 981 48 25

fan pulley

11

1

3

0.2

0.1

511.8

0.1

12.8

A 407 200 06 70

fan pulley shaft

12

1

40

2.2

1,0

13521.1

1.8

338.0

A 357 506 00 07

13

fan bearing A 007 981 49 25

1

40

2.2

1,0

9698.4

1.3

242.5

Water branch pipes

14

4

160

8.7

4.0

53953.3

7.0

1348.8

357 501 03 82

Water pump belt L 1250 A

15

1

126

6.8

3.2

9322.3

1,2

233.1

003 997 07 92

Tensioner belt kit L 1750

16

1

160

8.7

4.0

23258.0

3.0

581.5

A 005 997 41 92

total

1847

100

46.2

771802.1

100

19,295.1

Source: calculated by the author based on data from

The studies continues the operational reliability of

the Mercedes-Benz service in Tashkent.

vehicles operating in high altitude and hot climate of Uzbekistan.

References:

1. Alikhodjaev A.A. Management of standards for maintenance and repair of vehicles, taking into account operating conditions. Dis. Cand. those. sciences. - Tashkent: TADI, 2008 .-- 227 p.

2. Musadzhanov M.Z., Azimov A, Chukov O, Rokotyansky A

1. "Increasing the operational reliability of buses - an important reserve of improving their efficiency of use of" Proceedings of the All-Union Scientific-Technical Conference "Improving the efficiency and with the use of road transport in hot climates and high-ra nd ones", Tashkent, 1977.

2. Musadzhanov MZ, ways to improve the system Okhla railway Denia engines. Abstracts of All-Union Scientific-technical meeting rooms n tion "Increased efficiency and with the use of road transport in hot climates and high altitudes", Tashkent, 1985.

3. Musadzhanov M.Z., Alikhodjaev A.Umarov I.Razhabov E.Usmanov D.

38

Журнал «Интернаука»

№ 16 (145), часть 3, 2020 г.

4. Final report x / d No. 134-75 Inventory No. B952191 of 05/21/1981

5. Sharafutdinov T . T . P Accelerating reliability of vehicles for the carriage of petroleum products through the pass

"By amchik". Dis. Cand. those. sciences. - Tashkent: TADI, 2012 .-- 208 p.

6. Regulation on maintenance and repair of rolling stock of motor vehicles. - M .: Transport, 1986.- 73 p.

7. Musaev D.Kh. Musadzhanov, M.Z. Modes of technical serviceability cars , « the MAN the TG A 26400, 19400,"