WinGD X72 User Manual

Operation0750−1/A1
Winterthur Gas & Diesel Ltd.
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2.1 Oil Care
2.1.1 System Oil
To keep the lubricating oil in good condition for long periods, good oil treatment is
necessary. To do this, a self-cleaning, centrifugal separator is used.
The self-cleaning, centrifugal separator is used as a purifier in by-pass mode. The oil
flows from the oil tank through the centrifugal separator. The system oil volume must
be put through the centrifugal separator a minimum of three times each day. The
manufacturer of the centrifugal separator sets the output. The recommended oil
temperature for this treatment is 95_C unless the centrifugal separator supplier
recommends differently.
Solid contaminants (dirt) and water must be removed from the oil as completely as
possible. There is always a risk that water, specially sea water, can enter the system
and cause corrosion on engine parts. Water contamination can also cause bacterial
infection of the oil, which gives a decrease in lubrication and heavy corrosion of the
system. Good maintenance is the best precaution to keep water out of the oil. The
water content of the lubricating oil must not be more than 0.2% by mass during a long
period. If higher water contamination is seen, special procedures such as treatment in
the centrifugal separator, or in a renovating tank must be done.
The coarse and fine filters of the servo oil system must be serviceable. For more
data, see the documentation of the fine filter manufacturer and paragraph 2.3.2.
2.2 Limits for Selected System Oil Parameters
You make an analysis of the selected parameters to estimate the condition of the
lubricating system oil. Regular checks can find deterioration early and procedures can
be done to correct the problems.
Make sure that the limits of the system oil are not more than those given in the
Table 1 for long periods in service.
Table 1: Alert Limits of System Oil Parameters
Parameter Limit Test Method
Viscosity at 40_C
Maximum 140 mm
2
/s [cSt] ASTM D 445
Flash point (PMCC)
Minimum 200_C
ASTM D 92
Total insolubles Maximum 0.70% m/m
1)
ASTM D 893b
Base Number (BN) Maximum 12 mg KOH/g ASTM D 2896
Water content Maximum 0.20% m/m ASTM D 95 or ASTM D 1744
FZG gear machine
test
Minimum failure load
stage 9
ISO 14635-1(test method
A/8.3/90)
1) % m/m means by mass, e.g. a water content of 0.20% m/m means that the water
content is 0.20% of the mass of the total solution.
2016−11
Lubricating Oils

WinGD X72 Specifications

General

Brand	WinGD
Model	X72
Category	Engine
Language	English