Belarus 80.1/80.2/82.1/82.2/82
Р — Operation and Service Manual
Section 11. Specifications to be Adjusted
129
11. SPECIFICATIONS TO BE MAINTAINED BY ADJUSTMENT
Table 16
Description
Unit of
measurement
Value
DIESEL-ENGINE
Oil pressure in lubrication system on a warmed-up diesel-
engine, at rated crankshaft r.p.m.
kgf/cm
2
(MPa)
2,5-3,5 (0,25-0,35)
Fan leg (located in-between alternator and crankshaft pulleys)
sagging, at a 4 kgf (40 N) applied force
mm
15-20
Recommended coolant temperature (temperature condition)
°С
75-95
Clearance in-between rocker-arm head and valve stem end-
face on cold engine
mm
0,25-0,30
Fuel injection commencement pressure at nozzle (atomizer
needle rise pressure)
kgf/cm
2
(MPa)
220
+10
(21,6
+0,9
)
Fuel injection advance angle setting to TDC:
with fuel pump
4УТНИ
deg.
19…21
Tightening torque:
kgf
•
m (N
•
m)
main bearing bolts
20-22 (200-220)
cylinder head attachment bolts
19-21 (190-210)
connecting-rod bearing nuts
18-20(180-200)
flywheel attachment bolts
18-20 (180-200)
crankcase pulley bolt
24-28 (240-280)
crankshaft weight bolted attachment
12-14 (120-140)
nozzle bolted attachment
2-2,5 (20-25)
centrifugal oil filter hood nuts
3,5-5,0 (35-50)
FUEL PUMP (test-bench check)
4УТНМ
4УТНИ
Pump shaft rated speed
r.p.m.
1100±5
1100±5
Rotational speed under governor control
r.p.m.
1115
–1125 1115–1125
Rotational speed corresponding to diesel-engine idling
r.p.m.
15
10
1160
15
10
1160
Rotational speed under adjuster control
r.p.m.
1040
–
1100
1030
–
1090
Rotational speed corresponding to maximum torque
r.p.m.
850
850
Rotational speed at automatic cut-off of fuel through nozzles,
not over
r.p.m.
1210
1250
Cyclic fuel feed at 40
– 50 r.p.m. of the camshaft,
not less than
mm
3
/cycle
140
140
Cyclic fuel feed at rated r.p.m.
mm
3
/cycle
72,3±1,4
70±1,4
Cyclic fuel feed at maximum idling r.p.m., no more than
mm
3
/cycle
22,5
22,5
Pressure in fuel pump head at rated r.p.m. of the camshaft
kgf/cm
2
(MPa)
0,7
– 1,2
(0,07
–0,12)
0,7
– 1,3
(0,07
–0,13)
Fuel feed irregularity at rated r.p.m. of the crankshaft,
no more than
%
6
6
Fuel feed irregularity in-between sections at maximum idling
r.p.m., no more than
%
30
35
Fuel feed by section as determined by meniscus method to
valve lifter TDC (over cam profile)
deg.
57 ± 1
57 ± 1
