Thanks for you answer, but I was solve the problem today :)
"Does it boil over or lose coolant?" - No.
How problem solved: I just touched and a little shake (and turned it on some degree around axis) "HYDRAULIC FAN PUMP ACTUATOR" and spray WD-40 on surface. And cooler fan now work properly, with all speed range. How I understand, problem was in fan speed - it was too low all time. May be dirt or something some.
Saturday, April 14th, 2018 AT 11:22 AM