WÄRTSILÄ Vasa R22, Instruction Manual

Page: 35 / 297

Fast and great changes may indicate abnormal operation of the
engine or of a system.
c) Compensate for oil consumption by adding maximum 10 %
new oil at a time. Adding larger quantities can disturb the
balance of the used oil causing, for example, precipitation of
insolubles. Measure and record the quantity added. Attention
to the lubricating oil consumption may give valuable informa-
tion about the engine condition. A continuous increase may
indicate that piston rings, pistons and cylinder liners are
getting worn, a sudden increase motivates pulling the pistons,
if no other reason is found.
d) Guidance values for oil change intervals are to be found in
chapter 04. The intervals between changes are influenced by
operating conditions, fuel quality, centrifuging efficiency and
total oil consumption. Efficient centrifuging and large systems
(dry sump operation) generally allow for long intervals be-
tween changes. It is recommended to follow up that the BN
value of the lubricating oil keeps within Wärtsilä Diesel’s
limits during the whole oil change interval.
When changing oil the following procedure is recom-
mended:
1 Empty oil system while oil is still hot. Be sure that oil
filters and coolers are also emptied.
2 Clean oil spaces, including filters and camshaft comp-
artment. Insert new filter cartridges.
3 Fill a small quantity of new oil in the oil sump and circu-
late with the pre-lubricating pump. Drain.
4 Fill required quantity of oil in the system, see chapter 01,
section 01.1.
Oil samples taken at regular intervals, analysed by the oil
supplier and the analysis results plotted as a function of op-
erating hours is an efficient way of predicting oil change in-
tervals.
Send, or ask the oil supplier to send copies of oil analyses
to the engine manufacturer who will then assist in the evalu-
ation.
02.2.4 Lubricating oil for the governor
See the Instruction Book for the governor (attached). An oil of
viscosity class SAE 30 and SAE 40 is normally suitable and
usually the same oil can be used as in the engine system. Turbo-
charger oil can normally also be used in governor. Oil change
interval: 2000 h service.
22-9601 Fuel, Lubricating Oil, Cooling Water 02
VASA 22 02 - 15