HYDRAULICS 1.45 Non-return valve (63) (Up to Machine S/No.51200317 only) This is a simple non-return valve, which maintains system pressure for the parking brake circuit, in the event of hydraulic or engine failure. Pressure relief valve (64) (Up to Machine S/No.51200471 only) The cartridge pressure relief valve is attached to the cooling fan motor (7) and relieves excess pressure in the hydraulic fluid supply to the motor. The valve relieves pressure by diverting hydraulic fluid flow to the hydraulic tank (1).
Specifications Pressure relief valve 160 bar (2320 psi) Breather (70) The breather is fitted to the overflow line from the filler neck to tank return and ensures that the hydraulic tank is vented. This prevents any build up of positive or negative air pressure inside the tank, which would cause damage to the tank or restrict fluid flow.