Scania OC16 Gas. Industrial engine en-GB 2 831 273. Operator’s manual - part 5

 

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Scania OC16 Gas. Industrial engine en-GB 2 831 273. Operator’s manual - part 5

 

 

Quality requirements for fuel
Quality requirements for
fuel
IMPORTANT!
The operator is responsible for using the correct
type of gas to ensure that local laws are complied
with.
Methane amount and calorific
value per power level
The lowest permitted methane number and calo-
rific value varies depending on engine power, ac-
cording to the table below.
The methane number is calculated according to
the MWN method in EN 16726:2015. Use the
calculator on the Euromot website.
The calorific value is calculated according to
standard ISO 6976. Use Natural gas calorific
value calculator on the Unitrove website. This
calculator can also be used for biogas.
Engine power
Power class
Type of fuel
Lowest methane
Lowest calorific val-
number
ue
1,500/1,800 rpm
(MJ/m3)1
333/372 kW
PRP
Natural gas
70
23.5
372/411 kW
PRP
Natural gas
72
24.5
407/426 kW
PRP
Natural gas
75
26.5
360/360 kW
PRP
Pure biogas
70
21.5
330/350 kW
COP
Natural gas
70
23.5
320/320
COP
Pure biogas
70
21.5
1.
Lower calorific value at the reference state of 15°C (59°F) and 101.325 kPa.
64
Quality requirements for fuel
Other quality requirements
Requirements
Value
Natural gas
Biogas
Supply pressure to gas regula-
20-35 mbar (0.3-0.5 psi)
20-35 mbar (0.3-0.5 psi)
tor1
Fuel temperature
10-40°C (50-104°F)
Max. water content
A maximum of 60 per cent relative humidity at the lowest fuel temperature.
There is no water, other visible impurities or condensation.
Max. sulphur content (H2S)
40 mg/Nm3
Max. sulphur content (total)
150 mg/Nm3
Max. ammonia content
20 mg/Nm3
Max. halide pollution content
65 mg/Nm3
Max. hydrogen content
12% (v/v)
Max. siloxane content
1 mg/Nm3
5 mg/Nm3
Max. particle quantity
10 mg/Nm3
Max. particle size
5 μ (filtration with 99% cleaning above 5 μ is recommended)
Max. fluctuation speed in gas
5 mbar/30 s (0.07 psi/30 s)
pressure
Max fluctuation speed in calorif-
1% Ch4/30 s
0.5% Ch4/30 s
ic value
1. The values also apply at full load. Lower values may be permitted if they have first been approved by Scania. If lower values are used,
the maximum output is reduced.
With normal cubic metres (Nm3), gas is assessed
at the following temperature and pressure:
T = 273.15 K, p = 101.325 kPa.
65
Preparing the engine for storage
Preservative coolant
Preparing the engine for
Use coolant containing 50% by volume of gly-
storage
col. Example: BASF MPG Glysacorr P113 and
If the engine is not being used for an extended
Valvoline Zerex P113 FP.
period its cooling system, fuel system and com-
bustion chamber and outside must be protected
WARNING!
against rust.
The engine can normally stand idle for up to
Ethylene glycol can be fatal if ingested and can
6 months without needing preparation. For
cause skin irritation and eye damage.
longer periods of than 6 months, however, the
measures in the following sections must be tak-
en. These measures provide protection for ap-
proximately 3 years, then the preparing
procedure must be repeated. An alternative to
preparing the engine for long-term storage is to
start the engine and warm it up every 6 months.
Preparation means that the following measures
are taken:
Preparations for storage
• The engine is cleaned thoroughly.
• Run the engine for a specific period using
Environment
special preservative fuel, oil and coolant.
• Otherwise prepare the engine for storage (fil-
Use a suitable container. Used oil and coolant
ter renewal, lubrication, etc.).
must be disposed of as specified in national and
international laws and regulations.
Preservative products
1. Remove plugs and tape from the coolant
Preservative engine oil
connections, air intake and exhaust pipe.
Use a normal engine oil that meets the require-
2. Drain the oil.
ments in the Oil grade section.
3. Renew the oil filter and fuel filter in the gas
supply installation.
Preservative oil for combustion
chambers
4. Clean the centrifugal oil cleaner.
Suitable preservative oils are supplied by most
5. Fill with engine oil to the minimum level on
oil companies. Use a preservative oil based on
the oil dipstick.
mineral oil and propellant which must be com-
6. Drain and flush the cooling system of any old
pletely ventilated away.
coolant.
The oil should have as few other additives as
7. Top up with preservative coolant.
possible and must not contain PTFE or silicone.
An example of a good product to use is CRC Mo-
tor Protect.
66
Preparing the engine for storage
8. Start the engine and run it at low idling for
approximately 20-25 minutes if the coordi-
nator allows it. If it is not possible to run at
idling, run the engine at approx. 1,500 rpm
without load.
9. Detach the hose to the solenoid valve return
connection. Continuously spray preservative
oil into the inlet pipe until white smoke is ob-
served in the exhaust gases for at least
8 seconds.
Solenoid valve return connection.
10. Switch off the engine and refit the hose to the
magnet valve return connection.
11. Drain the coolant if the engine is not to be
stored with coolant in the system. Plug and
tape all coolant connections if the engine is
to be stored without coolant in the cooling
system.
12. Renew the filter elements in the air cleaner.
13. Cover the air intake and exhaust pipe.
14. Spray the outside of the alternator and starter
motor with water-repellent anti-corrosive
oil: CRC 226, LPS1 or equivalent.
15. Spray the outside of bright engine parts, first
with penetrating preservative oil such as
Dinitrol 25B and then with Dinitrol 112 or
the equivalent.
16. Detach the fuel hose from the throttle at the
gas mixer.
17. Spray the outside of the throttle with water-
repellent anti-corrosive oil, for example
LPS1 or equivalent. Make sure that the oil
reaches the holes for the throttle shaft in the
throttle housing.
18. Clearly mark the engine with the storage
Throttle at the gas mixer.
preparation date, and state that the engine
must not be started or cranked.
67
Preparing the engine for storage
Batteries
When the engine is to be taken into
operation again
WARNING!
1. Remove plugs and tape from the coolant
connections, air intake and exhaust pipe.
Wear protective gloves and protective goggles
2. Fill the cooling system with coolant.
when charging and handling batteries. The bat-
3. Drain the preservative oil.
teries contain a highly corrosive acid.
4. Renew the oil filter and fuel filter.
5. Fill with new engine oil.
Remove the batteries and trickle charge them at
6. Remove the rocker covers and lubricate the
the battery charging station. This does not apply
valve mechanisms with pushrods and the
to batteries specified as maintenance-free by the
valve tappets, as well as the injector mecha-
manufacturer.
nism, using a liberal amount of oil. Refit the
The same applies to short-term storage, even if
rocker covers.
the engine has not been prepared for storage as
7. Carry out a visual inspection of the engine
above.
and the engine compartment.
8. Wash off any preservative oil on the outside
Storage
using white spirit.
After the preparation, the engine should be
9. Renew the spark plugs.
stored indoors in a dry location at room temper-
ature. The engine must be packed in packaging
made of VCI plastic to protect against dust, dirt
and moisture.
68
Technical data
Technical data
General data
Number of cylinders and configuration
90° V8
Working principle
4-stroke engine
Cylinder diameter (mm/in)
130/5.118
Piston stroke (mm/in)
154/6.06
16.4/1,001
Displacement (l/in3)
Firing sequence
1 - 5 - 4 - 2 - 6 - 3 - 7 - 8
Compression ratio
12.2:1
Engine direction of rotation viewed from rear
Anti-clockwise
Fan direction of rotation viewed from front
Clockwise
Cooling
Coolant
Valve clearances, cold engine
Intake valve (mm/in)
0.45/0.017
Exhaust valve (mm/in)
0.80/0.031
Number of teeth on the flywheel
158
Low idling speed (rpm)
1,000
Operating speed (rpm)
1,500/1,800
Fuel
Natural gas or pure biogas
Approximate weight, without coolant and oil (kg/lb)
1,352/2,981
Lubrication system
40-48/2.4-2.9
Oil volume (l/in3)
Oil cleaning
Centrifugal oil cleaning
Oil cooler
Coolant cooled, full flow
Oil filter
Paper filter from Scania
Interval between oil changes (h)
500
Oil pressure (bar/psi)
Normal with the engine at operating temperature, operating speed
3-6/44-87
Minimum permitted at idling speed
0.65/9
Crankcase pressure with closed crankcase ventilation (mbar)
-5.4 to 2.0
69
Technical data
Fuel system
Type
Zero pressure gas supply system with
venturi function
Engine management system
OCE1
Cooling system
68/18
Coolant volume including 1.5 m2 radiator (dm3/US gallons)
Coolant temperature (°C/°F)
90-95/194-203
Number of thermostats
1
Thermostat opening temperature (°C/°F)
80/176 and 87/189
Intake system
Permissible pressure drop in the intake system with cleaned filter
30/0.4
(mbar/psi)
Permissible pressure drop in the intake system with blocked (dirty) fil-
65/0.9
ter (mbar/psi)
Electrical system
Type
1-pin, 24 V, DC
Starter motor, standard equipment
1-pin, 24 V, 7.0 kW
Alternator, standard equipment
1-pin, 28 V, 100 A
70
Scania Assistance
Scania Assistance
Wherever you are, you can always get assistance
from the Scania service organisation, Scania As-
sistance, all day, every day of the year.
Always call the contact for your country.
AR
0800 999 722 642
LU
+32 226 400 000
AT
+43 1 256 44 11
MA
+32 2264 0000
AU
1300 SCANIA
ME
+381 60 8484 122
1300 722 642
MW +27 11 2265005
BA
+387 61 225 917
MY
1800 08 8500
BE
+32 2 264 00 00
+603 55909077
BG
+359 886 660 001
MX
01 800 4SCANIA
BR
0800 019 42 24
NA
+27 11 226 5005
BW
+27 11 226 5005
NL
+31 76 52 54 111
CA
+1-800-2-SCANIA
NO
+47 223 217 00
CH
+41 800 55 24 00
PE
0800 51 727
CL
188 800 722 642
PL
+48 22 331 22 33
CZ
+420 225 020 225
PT
+34 91 678 9237
DE
+49 261 887 8888
RO
+40 723 27 27 26
DK
+45 333 270 44
RS
+381 60 8484 122
EE
+372 5153 388 (Tallinn)
SE
+46 42 100 100
+372 5126 333 (Tartu)
SG
(65) 6591 7180
+372 5071 477 (Pärnu)
+65 6861 9181
+372 5047 655 (Rakvere)
SI
+386 1 2427 606
ES
+34 91 678 80 58
SK
+421 903 722 048
FI
+358 10 555 24
TR
+90 444 72 44
FR
+33 2 41 41 32 32
TZ
+27 11 226 5005
GB
0 800 800 660
US
1-800-2-SCANIA
+44 1274 301 260
UY
0800 8351
GR
+30 6944 420 410
ZA
0800 005 798
HU
+36 209 727 197
+27 11 226 5005
IE
+353 71 963 4000
ZM
+27 11 2265005
IT
+39 0461 996 222
ZW
+27 11 2265005
KR
+82 1588 6575
Other countries: +46 8 52 24 24 24
Calls will be recorded for training purposes.
71
General tightening torques for screw joints
General tightening torques
for screw joints
Hexagon screws, hexagon
socket screws, Torx screws,
hexagon nuts
Metric thread. Strength class 8.8/8.
Tightening torque
Thread
Nm
Lb-ft
M4
2.9
21
M5
6
4
M6
9.5
7
M8
24
18
M10
47
35
M12
84
62
M14
135
100
M16
210
155
M18
290
214
M20
420
310
M22
580
428
M24
730
538
Flange screws with hexago-
nal head and hexagonal
flange nuts
Metric thread. Strength class 8.8/8.
Tightening torque
Thread
Nm
Lb-ft
M5
6.7
5
M6
10.2
8
M8
26
19
M10
50
37
M12
92
38
M14
149
110
M16
184
136
72
General tightening torques for screw joints
Hose clamps
Specifications in the tables show tightening
torque when tightening by hand.
A = width
Tightening torque
(mm)
Nm
Lb-ft
7.5-9
1.5
1
12
5
4
A
The maximum tightening torque for a new unfitted
hose clamp is 1 Nm (0.7 lb-ft).
A = width
Tightening torque
(mm)
Nm
Lb-ft
20
10
7
25
20
15
A
A
73

 

 

 

 

 

 

 

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