12.3.5
Recommended procedure for samples
WinGD recommends to get a sample of the system oil each 3000 operating hours for regular oil
analysis and each 6000 operating hours for additional FZG and particle count (ISO 4406 and NAS
1638) analysis. Get the oil samples at the correct oil sample points:
•
For an engine with servo oil filter, get the samples as follows:
○
Get a sample from the sample point at the engine inlet.
○
If the analysis shows unusual values, get a sample from the sample point after the
servo oil filter.
•
For an engine without servo oil filter, get the sample from the sample point at the engine
inlet.
For the procedure to get a sample, refer to
9.1 Do an analysis of the system oil
.
Send the samples immediately to a laboratory to do the correct analyses.
With these regular checks you can find deterioration in time. Thus you can do procedures to correct
the problems.
12.3.6
Recommended procedures related to the results
If one or more of the alert values in
Table 12-4 - Alert and condemnation limits for system oil
are
given, you must do applicable procedures to correct the problem. WinGD recommends that you
speak to the system oil supplier in such a condition. Applicable procedures are as follows:
•
Increase the purification in the separator (decrease the flow rate and/or adjust the
temperature).
•
Treat the oil in a renovating or settling tank.
•
Replace a part of the system oil.
If an alert value is given, stop the engine and do the correct procedures.
If a condemnation value is given, immediately replace a part of the system oil until the values are
satisfactory. If you cannot change a part of the system oil immediately, stop the engine until you
could change a part of the system oil. This prevents damage to the engine.
12.3.6.1
Base Number (BN) increases suddenly
If the Base Number (BN) of the system oil increases suddenly, do a check of all piston rod gland
boxes and of the piston rod conditions. If necessary, replace the sealing rings of the related gland
box or repair the gland box.
NOTE:
If the BN increases a small quantity, this is usually an indication that the system oil
consumption is low. A usual consumption and replenishment of system oil is necessary
to keep the system oil in good condition.
12.3.6.2
Flash point decreases
If the flash point of the system oil decreases below the values given in
condemnation limits for system oil
, do a replenishment of the system oil. This prevents an increase
of the BN of the system oil.
X52
AA00-0000-00AAA-030F-A
Operation Manual
System oils
Winterthur Gas & Diesel Ltd.
- 451 -
Issue 002 2018-11
