12.3.3
Alert and condemnation limits for system oil
Table 12-4 - Alert and condemnation limits for system oil
shows the WinGD recommendations for
alert and condemnation limits for system oil.
Tab 12-4
Alert and condemnation limits for system oil
Parameter
Alert limit
Condemnation limit
Unit
Test method
Viscosity at 40°C
Maximum 140
Maximum 150
mm
2
/s [cSt]
ASTM D 445
Flash point
Minimum 200
Minimum 180
°C
ASTM D 92/93
Total insoluble materials
Maximum 0.7
Maximum 1.0
ASTM D 893b
Base Number (BN)
Maximum 12
Maximum 15
mg KOH/g
ASTM D 2896
Water content
Maximum 0.20
Maximum 0.30
% m/m
ASTM D 95 or
ASTM D 1744
Strong Acid Number (SAN) 0.0
0.0
mg KOH/g
ASTM D 664
Calcium
-
Maximum 6000
mg/kg [ppm]
ICP
Zinc
-
Minimum 100
mg/kg [ppm]
ICP
Phosphorus
-
Minimum 100
mg/kg [ppm]
ICP
Minimum failure
load stage (FLS) 9
Minimum failure
load stage (FLS) 8
-
A/8.3/90
(ISO 14635-1)
1
% m/m means by mass, eg a water content of 0.20% m/m means that the water content is 0.20% of
the mass of the total solution.
2
To do the FZG gear oil test is recommended one time each year.
NOTE:
Use these limits as a guide. You cannot make an estimate of the system oil by one
parameter. Get also other oil parameters to find the causes of problems.
12.3.4
Particle count and size classes
The requirements for particle size analysis applies only for hydraulic systems. These systems
operate the exhaust valves, the cylinder oil system and the fuel injection system (if applicable).
Abrasive particles in the oil can cause wear on different parts of the engine. Some types of WinGD
engines have a filter for servo oil.
12.3.4.1
Specifications
There are two different specifications for particle classes:
•
ISO 4406
•
NAS 1638 and SAE AS 4059
The (newer) ISO 4406 particle count and size classes for oils are given in
count and size classes ISO 4406
X52
AA00-0000-00AAA-030F-A
Operation Manual
System oils
Winterthur Gas & Diesel Ltd.
- 447 -
Issue 002 2018-11