Volvo EC360B - Page 242

Return Piping
Return check valve produce some amount of backpressure, which is used for make-up function. 4.5bar
check valve is used for bypass function when hydraulic oil cooler is clogged.
27: 3.0k Return check valve
28: 4.5k Return check valve
29: Hydraulic oil cooler
34: Hydraulic tank
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