
ALPHA SERIES ENGINES WORKSHOP MANUAL
81
8.2 TECHNICAL DATA - LPWS
LPWS2
LPWS3
LPWS4
LPWST4
Type of fuel injection
Indirect
Number of cylinders
2
3
4
4
Direction of rotation - looking on flywheel
Anti-clockwise
Nominal cylinder bore - refer to "07.7 Dimensions of
wearing Parts" for machining tolerances
mm
86.0
86.0
86.0
86.0
in
3.38
3.38
3.38
3.38
Stroke
mm
80.0
80.0
80.0
80.0
in
3.15
3.15
3.15
3.15
Cylinder capacity - total
litre
0.930
1.395
1.860
1.860
in³
56.75
85.13
113.50
113.50
Compression ratio
22:1
22:1
22:1
22:1
Mean piston speed at 3000r/min
m/sec
7.99
7.99
7.99
ft/min
1575
1575
1575
Firing order - (number 1 cylinder is at the gear end)
1 - 2
1 - 2 - 3
1 - 3 - 4 - 2 1 - 3 - 4 - 2
Lubricating oil pressure at 3000r/min and with the oil at
110ºC
(230ºF)
bar
2.0
2.0
2.0
2.0
lbf/in²
29.0
29.0
29.0
29.0
Lubricating oil pressure at idle
bar
1.0
1.0
1.0
1.0
lbf/in²
14.5
14.5
14.5
14.5
Oil pressure relief valve setting
bar
3.4 - 4.1
3.4 - 4.1
3.4 - 4.1
lbf/in²
48.0 - 60.0 48.0 - 60.0 48.0 - 60.0
Number of flywheel ring gear teeth
96
96
96
96
Idling speed:
Build 73
Build 76
Build 84
All other Builds
r/min
800 - 850
r/min
1025 - 1050
r/min
950 - 1000
r/min
850 - 900
Minimum full load speed
r/min
1500
Fuel lift pump maximum lift
mm
3048
3048
3048
in
120
120
120
Fuel lift pump maximum head
mm
600
600
600
in
23.6
23.6
23.6
Radiator fan ratio
1:1
1:1
1:1
Maximum continuous crankshaft end thrust
kgf
180
180
180
lbf
400
400
400
Dry engine weight - approximate and based on Build 01.
Refer to Lister Petter Power Systems for actual figures
kg
112
150
180
lb
247
330
396
Maximum permissible intake restriction at full load
mm H
2
O
254
254
254
254
in H
2
O
10.0
10.0
10.0
10.0
Maximum permissible exhaust back pressure
mm H
2
O
762
762
762
in H
2
O
30.0
30.0
30.0
20.0
Maximum top hose temperature
°C
103º
103º
103º
°F
217º
217º
217º
Fuel filter nominal rating
micron
5 - 7
5 - 7
5 - 7
Содержание 0600123LPW3A01
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