6. LUBE OIL SYSTEM
6.3 External lube oil system
LH1
ENGINE
TI TI
C91
LR1 A
C B
C59 1112
PDSH PDI LF2 TSHH TT PSLL PSL PT PI TI
1203 1202 1106 1103
1104 1102 1105
EC1 LR2 LP1
LF4 C58
PI PSL 1142
LP2
LF4
C46a
C65
C61
LT2
LI LSL 1301
C60
LF4 LP9 LS1
LH2
TI TI PI
02 03 04 05 06
07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22
6.3 External lube oil system
W
H
02 03 04 05
06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22
Lube oil stand-by force pump LP2 (separate) This pump is a stand-by to the force
pump LP1.
It is a gear or screw type pump.
It is a requirement of the classil cation societies for single-engine plants.
This pump will also be used for prelubricating.
Capacity Motor power W H Weight
[m³/h] [kW] [mm] [mm] [kg]
6/8/9 M 25 E 400 V / 50 Hz440 V / 60 Hz 70
70 37
36 628
628 1,773
1,728 701
588
Fig. 6-5 Lube oil stand-by force pump LP2
A C
E B D
DN 80/50
DN 80/50
Suction pipe
Strainer
02 03 04 05 06
07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22
Prelubricating pump LP5 (separate)
This pump can be installed instead of a stand-by force pump in multiple engines plants.
This pump can only be used for prelubricating, not as stand-by for the force pump.
Capacity see technical data.
Fig. 6-6 Prelubricating pump LP5
Dimensions [mm] Motor
power Weight
A B C D E [kW] [kg]
6 M 25 E 400 V / 50 Hz 400 V / 60 Hz 980
820 338
290 354
324 DN 80
DN 50 210
190 5.5
4.8 124
80 8/9 M 25 E 440 V / 50 Hz
440 V / 60 Hz 1,020
1,020 338
338 354
354 DN 80
DN 80 210
210 7.5
9.0 139
130 The pumps can be installed in horizontal or vertical position.
Suction strainer LF4 (separate) This strainer shall only protect the pumps.
It is not in the Caterpillar Motoren scope of supply.
Mesh size 2 – 3 mm.
Fig. 6-7 Suction strainer LF4
480 L
225
1365200
1715
02 03 04 05
06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22
Oil pressure regulating valve LR2 (l tted)
The pressure control valve controls the lube oil pressure at engine inlet by giving only the adequate oil m ow to the engine. Excessive oil m ow will be led back into the engine oil pan.
Lube oil cooler LH1 (separate)
A plate cooler with plates of stainless steel will be used to dissipate the heat to the LT fresh water system.
Fig. 6-8 Lube oil cooler LH1
L Weight
[mm] [kg]
6 M 25 E 534 471
8 M 25 E 634 499
9 M 25 E 634 513
G
H 30
A
C B
øD
F
02 03 04 05 06
07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22
Lube oil temperature control valve LR1 (separate)
A wax operated control valve will be used to control the oil inlet temperature into the engine.
It has an emergency manual adjustment.
Option: Electric driven valve with electronical controller.
Fig. 6-9 Lube oil temperature control valve LR1
Dimensions [mm] Weight
DN D F G H [kg]
6 M 25 E 80 200 171 267 151 27
8/9 M 25 E 100 220 217 403 167 47
Centrifugal l lter LS2 (separate)
A centrifugal l lter can be used for cleaning of lube oil. This may extend the lube oil change intervals.
D
A 2 1
3
CB
02 03 04 05
06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22
Lube oil temperature control valve LR1 (electric driven valve), option
Fig. 6-10 Lube oil temperature
control valve LR1 (electric driven valve)
Dimensions [mm] Weight
DN A B C D [kg]
6 M 25 E 80 310 624 155 170 58
8/9 M 25 E 100 350 646 175 170 70
Lube oil separator LS1 (separate)
The most effective cleaning of lube oil is carried out by means of separation.
Separation is mandatory for HFO driven plants and highly recommended for MGO/MDO operation.
Layout for MGO/MDO operation
Automatic self-cleaning separator; Operating temperature 85 - 95 °C
V [l/h] = 0.18 · Peng [kW] Peng= Power engine [kW]
Layout for HFO operation
Automatic self-cleaning separator; Operating temperature 95 °C
V [l/h] = 0.29 · Peng [kW] Peng= Power engine [kW]
For the layout of separators, please follow the separator manufacturer‘s guidelines.
LH1
ENGINE
TI TI
LR1 A
C B
C91
C59 1112.2
PDSH PDI 1112.1
LF2 TI PI
TT PSLL PSL PT TSHH
1203 1202 1106 1104 1105
LR2
EC1 LP1
C53 y
LS1
PI TI
TI LH2 LF4 LP9
LF4 LF4
LI
LSL LT1
C51 z z
LP2 PI
PSL 1142 C58
02 03 04 05 06
07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22
Lube oil system with dry sump
Pipes are to be connected free of tension to the engine connection points..
Fig. 6-11 System diagram, dry sump tank
EC1 Exhaust gas turbocharger LF2 Self-cleaning lube oil l lter LF4 Suction strainer
LH1 Lube oil cooler LH2 Lube oil preheater LP1 Lube oil force pump
LP2 Lube oil stand-by force pump LP9 Transfer pump (separator) LR1 Lube oil temperature control valve LR2 Oil pressure regulating valve LS1 Lube oil separator
LT1 Sump tank LI Level indicator LSL Level switch low PDI Diff. pressure indicator PDSH Diff. pressure switch high
PI Pressure indicator PSL Pressure switch low PT Pressure transmitter TI Temperature indicator TSHH Temperature switch high high TT Temperature transmitter (PT100) C51 Force pump, suction side C53 Lube oil discharge C58 Force pump, delivery side C59 Lube oil inlet, lube oil l lter C91 Crankcase ventilation to stack y Provide an expansion joint.
z Max. suction pressure - 0.4 bar
LH1
ENGINE
TI TI
LR1 A B C
PI PI
LP5 LP7
LF4 LF4
C59 C91
PDI PDSH
LF2
C48 PSLL
TSHH
PI PT
TT TI PSL
LP1 LR2 LP3
C52 C58
y y
d
e
LI
LSL
LT1
LF4 f
LS1 C51
y
TI
LH2
TI PI
LP9 LF4
02 03 04 05
06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22
Lube oil system with high level circulating tank
If there is no sufl cient space for a separate circulating tank below the engine itself and an engine with wet sump is not applicable, a separate circulating tank can be foreseen adjacent to or even above the engine.
The maximum height of the oil level in the circulating tank is limited to 2.5 m above the crankshaft centre.
In this case a lube oil recirculation pump and a respective standby pump will be necessary.
Power of recirculation pump and standby pump see technical data.
In this case please contact Caterpillar Motoren.
Fig. 6-12 System diagram, high level tank
02 03 04 05 06
07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22
LF2 Self-cleaning lube oil l lter LF4 Suction strainer
LH1 Lube oil cooler LH2 Lube oil preheater LP1 Lube oil force pump LP3 Lube oil suction pump LP5 Prelubrication force pump LP7 Prelubrication suction pump LP9 Transfer pump (separator) LR1 Lube oil temperature control valve LR2 Oil pressure regulating valve LS1 Lube oil separator
LT1 Lube oil sump tank LI Level indicator LSL Level switch low PDI Diff. pressure indicator PDSH Diff. pressure switch high PI Pressure indicator PSL Pressure switch low PSLL Pressure switch low PT Pressure transmitter TI Temperature indicator TSHH Termperature switch high TT Temperature transmitter (PT100)
C48 Stand-by suction pump, suction side C51 Force pump, suction side
C52 Suction pump, delivery side C58 Force pump, delivery side C59 Lube oil inlet, duplex l lter C91 Crankcase ventilation to stack d Opening pressure 1.0 bar e Filling pipe
f Drain
y Provide an expansion joint
Main and stand-by pump suction pipe
Oil cap. 1.0 - 1.36 l/kW
Separator suction
Separator return
D D
Discharge DN200 from engine with compensator
80% Oil filling
ca. 60 % Oil minimum alarm
H = 0.5 x D H = 0.5 x D