MAN D20_eng
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Published by Silas F Pimenta
Common Rail System
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D:\Auto\TRUCK\MAN\MAN Series\
_ \
\en\D20_eng.doc Page 15
5
Installed dimensi
ons Wear limit
1 Compression ring
0,40 - 0,55 mm 1,5
0 mm
2 Compression ring
0,47 - 0,70 mm 1,5
0 mm
3 Oil scraper ring
0,25 - 0,55 mm 1,5
0 mm
Exhaust valve recess
0,60 - 0,8 mm
Inlet valve recess
0,60 - 0,8 mm
Inlet valve clearance
0,5 mm
Exhaust valve
clearance
0,8 mm
- with EVB
0,6 mm
D:\Auto\TRUCK\MAN\MAN Series\
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\en\D20_eng.doc Page 15
6
D 20-CR
TIGHTENING
TORQUES
Item Thread
Strengthclass
Tighteningtorque
NmInitialtightening
Nm
Tighteningangle
Remarks
1
Main bearing cap to cra
nkcase M 18x2 10.9 30
0+30 90+10 Do not r
e-use screws2 Large int
ermediate gearwheel pi
n M14 10.9 100+10 90
3 Thrust washer at timi
ng case M8 12.9 404 Ca
mshaft gearwheel to ca
mshaft M16x1,5
10.9 100 150+10 905
Flywheel to crankshaft
M14x1,5 10.9 140+10
1X90+10 Not to be re
-used6
Big end cap to connecti
ng rod M12x1,5 11.9 10
0+10 90+10 Not to b
e re-used7 Rocker beari
ng pedestal to cyl. head
M12 10.9 105+108 Loc
knut at adjusting screw
M10x1 10.9 409 Exhaus
t manifold to cylinder h
ead M10 60+5
90+10 Torx E 1410 Fl
ame start pre-heat plug
M32x1,5 max. 25 Nm11
Injector lines M14x1,5 1
0 60/30Initial fitting
60Later fitting
3012 CR injector wire
connection M4 1,5+0,2
513 Control unit decoup
ling M8
8.8 12+2 Loctite 27014
High-pressure pump dri
ve gear 105
515 Ribbed V-belt pulle
y to alternator M16x1,5
80
516 Vibration damper
M16x1,5 10.9150
1090+1017 Cooling f
an hub to fan shaft M16
x1,5 100 90+10 Left-
hand thread18 Air com
pressor drive gear M18
x1,5 80+1019 Pressure
relief valve at compress
or M26x1,5 90+1020 Fil
ter cover for oil module
40+1021Cylinder head
bolts M18x2
10.9 10 +80+ 300
3x90+10 Optimol Whi
te T (oil)
D:\Auto\TRUCK\MAN\MAN Series\
_ \
\en\D20_eng.doc Page 15
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ABO U T
The Series D2066 LF
series of inline engines
was a new
development for the
heavy Trucknology
Generation (TGA)
series of MANtrucks:
New, higher power-
output and torque
ratings and
steeper torque curves.
Increased peak
effective pressure in
the engine and the
newcombustion
principle with
common-rail (CR) fuel
supply havedistinctly
improved engine
efficiency and lowered
fuelconsumption over
large area of the
operating range.
The system used to
bolt down the
individual cylinder
heads, the cylinder
head gaskets, the
cylinder liners and the
crankcase have all
been redeveloped to
withstand the
higher ignition
pressures.
Adoption of the
second-generation
Bosch Common Rail
fuel injection system
(1600 bar).
Engine management
by EDC7 and
communication with
FFRvia the CAN bus.
Depending on
operating conditions
and the quality of the
fueland oil, oil-change
intervals of up to
120.000 m can
beachieved, so that
the customers
operating costs are
lower.
The new D2066LF
10.5-litre engine
concept is designed
toachieve even higher
reliability.
The engine braking
effect has been
increased in
conjunctionwith a
developed version of
the pressure-controlled
exhaustvalve brake
(EVB) which is
available as
an optional extra.
