11
14.7
wear
14
9.8
wear
6 Oil pump
-
wear
1
0.7
wear
7 Head gasket
11
14.7
burnout
14
9.8
burnout
8
Connecting rod
-
wear
4
2,8
wear
9
Head cover gasket
11
14.7
burnout
15
10.5
burnout
10 Pusher
-
wear
3
2,3
wear
11 Yoke
-
wear
3
2,3
wear
12
Barbell
-
wear
6
4.3
wear
13
Crankshaft
1
1.3
wear
1
0.7
wear
35
Журнал «Интернаука»
№ 16 (145), часть 3, 2020 г.
14
Exhaust manifold gasket
5
6.6
burnout
15
10.5
burnout
1 5 Piston pin
-
wear
4
2,8
wear
1 6 ICE pillow
3
4.1
wear
5
3,5
wear
Total
75
100
142
100
Bus operating conditions in Tashkent. The tempera-
Service by year (once a year, three years 1 time,
ture of the air - a maximum of + 44 ° , minimum, -29 °
five years 1 time)
C , , average - 14.8 ° C . Humidity air : - in the period of In order to determine the reliability indicators of
time is hot - 21%, - a cold time - 55%. About 429 mm Mercedes-Benz O 405 buses in hot climates and heavy
of precipitation falls annually. Barometric pressure
traffic in a big city, taking into account the specific con-
is 1.0 kg per 1 cm 2 . The average annual wind speed is ditions of operation on the city routes , Mercedes-Benz 1.4 m/s.
O 405 buses were tested
The reliability of buses for specific operating condi-
A study was conducted to select the equivalent of
tions largely depends on the accepted modes of bus ser-
motor oils for Mercedes-Benz and Otayul buses from
vice, which characterizes the frequency, list of opera-local production instead of imported ones and establish
tions, and their complexity.
the optimal timing for their replacement. [1 9 ]
The system of service for specific maintenance
Was conducted controlled operation of 40 buses,
conditions buses designed with buses Guidance Docu-
"Mercedes-Benz O 405" 8 - the bus fleet of the city of ment "Mercedes-Benz" joint analysis of the operating Tashkent . Units and parts critical to reliability have experience of the service station, chronometry results been identified [ 20 ].
data and expert evaluation specialists [1 5 16,17,18 ] .
Reliability maps of Mercedes-Benz O 405 buses
After-sales service of Mercedes-Benz buses is di-
have been developed, which are necessary for improv-
vided into the following types:
ing the design, production and operation of buses [ 21 ].
daily maintenance (performed in the ATP).
Were first identified indicators buses reliability
after-sales service with a frequency of 15.0
properties of the "Mercedes-Benz O 405" for the com-thousand km (S-15000km.)