from Blackstone Labs...12-16-04
...When the oil serves sintered bronze clutch discs we expect to find copper,lead and tin in the oil. Since this oil serves hydraulics, we think it is long past the point at which the oil should be changed. Typically, clean hydraulics do not have more than 10 ppm of any metals in them. Neither should the insolubles read this high. The TAN was 0.4, showing mild acidity. No moisture was found, but the oil is no longer serviceable.
Alum 2
Chrom 1
Iron 32
COPPER 140
LEAD 67
Tin 4
Moly 2
Nick 0
Silver 0
Tit 0
Pot 0
Boron 19
Silcon 9
Sodium 5
Calcium 3037
Mag 18
Phos 1033
Zinc 1262
Barium 5
SUS viscosity 49.1 should be 50-59
insoluables 0.1 should be less than 0.1
Sauer Sundstrand hyd pump 828508400700
make up oil 1 gallon(approx)
1254 hours(electric)on fluid
filters(3) changed twice during this period.
...When the oil serves sintered bronze clutch discs we expect to find copper,lead and tin in the oil. Since this oil serves hydraulics, we think it is long past the point at which the oil should be changed. Typically, clean hydraulics do not have more than 10 ppm of any metals in them. Neither should the insolubles read this high. The TAN was 0.4, showing mild acidity. No moisture was found, but the oil is no longer serviceable.
Alum 2
Chrom 1
Iron 32
COPPER 140
LEAD 67
Tin 4
Moly 2
Nick 0
Silver 0
Tit 0
Pot 0
Boron 19
Silcon 9
Sodium 5
Calcium 3037
Mag 18
Phos 1033
Zinc 1262
Barium 5
SUS viscosity 49.1 should be 50-59
insoluables 0.1 should be less than 0.1
Sauer Sundstrand hyd pump 828508400700
make up oil 1 gallon(approx)
1254 hours(electric)on fluid
filters(3) changed twice during this period.