One of hydraulic oil report of a loco is pasted below.Is the pump failure due to the oil or any other reasons?

Parameter Test Method Value
Flash Point, COC, ░C ASTM D 92 224
Kinematic Viscosity @ 40░C, cSt ASTM D 445 67.08
Kinematic Viscosity @ 100░C, cSt ASTM D 445 10.21
TAN, mg KOH/g ASTM D 664 1.75
Viscosity Index ASTM D 2270 133
Water, % wt. ASTM D 95 0
Wear Metals - Aluminium, ppm ICP 3
Wear Metals - Chromium, ppm ICP 0
Wear Metals - Copper, ppm ICP 47
Wear Metals - Iron, ppm ICP 13
Wear Metals - Lead, ppm ICP 11
Wear Metals - Nickel, ppm ICP 0
Wear Metals - Silicon, ppm ICP 1
Wear Metals - Tin, ppm ICP 5

The sample collected from a loco, hydraulic system after 2500 hrs of running in a cement company.

thanks in advance

What type pump, operating pressure and what about the fluid cleanliness code?
Tom

Dear Mr.Tom,

This is Danfoss make 90 series variable displacement pump (hydraulic piston pump) with a pressure of 380 bar.Servo valve is in action.The problem is pressure drop.pressure goes down to 50 bar even......

Piston pumps and servo valves require clean fluid(esp. the servo) around 13/9 cleanliness level per ISO 4406-there is also a manufacturers recommendation for optimum viscosity for all pumps, piston pumps being somewhat more sensitive to cleanliness level and viscosity than other types. Sorry I can not answer your question with the lab report you provided as I am not proficient in the
"oil analysis". With other comonents working correctly in the circuits( i.e. relief valve) i would suspect three body abrasion that goes with particulate contamination. Hope this helps,
Tom