MAN B&W 5L28/32H, Manual

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08028-0D/H5250/94.08.12
It should, however, be observed that during the
running in period the lubricating oil consumption
may exceed the values stated.
Quality of Oil
Only HD lubricating oil (Delegent Lubricating Oil)
should be used, characteristic stated in "Lub. oil
spec. B 12 15 0".
B 12 00 0
L28/32H
1613544-6.4
Page 2 (4)
Internal Lubricating Oil System
99.48
Quantities in litres for engine,
incl. cooler, filters and pipes on engine
823
963
1100
1240
1380
5
6
7
8
9
Engine type
Table 1 Quantities for starting-up the engine incl. cooler, filters and
pipes on engine.
Max. velocity recommendations for external lubrica-
ting oil pipes:
– Pump suction side 1.0 - 1.5 m/s
– Pump discharge side 1.5 - 2.0 m/s
Lubricating Oil Consumption
The lubricating oil consumption of MCR is:
Consumption at MCR
kg/hours
0.83
0.99
1.16
1.32
1.49
5
6
7
8
9
Engine type
Table 2 Lubricating oil consumption, tolerance ±25%.
System Flow
The lubricating oil pump draws oil from the oil sump
and presses the oil through the cooler and filter to the
main lubricating oil pipe, from where the oil is distri-
buted to the individual lubricating points. From the
lubricating points the oil returns by gravity to the oil
sump.
The main groups of components to be lubricated are:
1 – Turbocharger
2 – Main bearings, big-end bearing etc.
3 – Camshaft drive
4 – Governor drive
5 – Rocker arms
6 – Camshaft
1) For priming and during operation, the turbo-
charger is connected to the lub. oil circuit of the
engine, the oil serves for bearing lubrication.
The inlet line to the turbocharger is equipped
with a fixed throttle in order to adjust the oil flow
and a non-return valve to prevent draining
during stand-still.
The non-return valve has back-pressure func-
tion requiring a pressure slightly above the
priming pressure to open in normal flow direc-
tion. In this way overflooding of the turbo-
charger is prevented during stand-still periods,
where the prelubricating pump is running.
2) Lubricating oil for the main bearings is sup-
plied through holes drilled in the engine frame.
From the main bearings it passes through
bores in the crankshaft to the connecting rod
big-end bearings.
The connecting rods have bored channels for
supply of oil from the big-end bearings to the
small-end bearings, which has an inner cir-
cumferential groove, and a pocket for distribu-
tion of oil in the bush itself and for supply of oil
to the pin bosses and the piston cooling through
holes and channels in the piston pin.