MTW Belarus 90, Operating Manual

Page: 108 / 123

Section G. Maintenance Belarus – 90/92 Operating manual
108
Adjusting characteristics of fuel pumps 4UTNI and 4UTNI-
Т
on stand
Table 1
Description of characteristic Unit
measure
4UTNI
D-243.1
Angle of commencement of fuel delivery by section on the meniscus
to upper dead point of tappet (on cam profile) degree 57±1
Rated speed of the pump camshaft rpm 1100±5
Cyclic fuel delivery at rated speed mm
3
/cycle 70±1,4
Rotation frequency when regulator taking effect rpm 1115-
1125
Irregularity in fuel delivery between sections at rated frequency, no
more % 6
Rotation frequency appropriate to the engine idle running rpm 1160
Cyclic delivery at maximum idle speed, no more mm
3
/cycle 22,5
Irregularity in fuel delivery between sections at maximum idle speed,
no more % 35
Rotation frequency appropriate to the maximum torque rpm 800…850
Rotation frequency appropriate to the shutdown of corrector rpm 1030-
1090
Cyclic fuel delivery at pump camshaft speed 80-100 rpm, no less mm
3
/cycle 140
Head pressure of fuel pump at the camshaft rated speed MPa
(kgf/
с
m
2
)
0,07-0,13
(0,7-1,3)
Rotation frequency appropriate to the total automatic trip of fuel
delivery through the nozzles, no more rpm 1250
105-115
mm
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