GENERAL / Bleeding Air from Hydraulic Circuit BLEEDING AIR FROM HYDRAULIC OIL TANK CAUTION: Escaping fluid under pressure may penetrate the skin and eyes, and cause serious injury. Release the pressure before disconnecting the hydraulic piping or removing other equipment. Hot hydraulic oil just after operation may spout out and cause severe burns. Wait for oil in order to cool before starting any work. Do not turn cap (2) of hydraulic oil tank (3) quickly. Cap (2) may fly off by internal pressure. Release any remaining pressure before removing cap (2). Preparation 1 2 3 1. Park the machine on a solid and level surface. Set the front attachment in position for checking hydraulic oil level. 2.
Stop the engine. Push air bleed button (1) of hydraulic oil tank (3) and bleed air from hydraulic oil tank (3). 3. Remove cap (2) of hydraulic oil tank (3). W1R7-01-04-001 4. Install vacuum pump (a) to the position where cap (2) has been removed. Operate vacuum pump (a) and maintain negative pressure in hydraulic oil tank (3). NOTE: Operate vacuum pump (a) continuously while working. W1R7-01-04-002 W1-4-1 a b c a-Vacuum Pump b-Hose c-Adapter a b c acuum Pump ose dapter a-V b-H c-A acuum Pump ose dapter