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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