AFTER ASSEMBLY Installation and bleeding SPECIAL PRECAUTIONS To avoid physical injury and damage to the equipment: Read the installation, maintenance and repair procedures in the Repairs and Maintenance Manual.
WARNING To avoid injury and damage to the product: Hold the product down firmly on a grooved work platform or in a vice.
1. Connect a transparent vinyl hose 5 x 8mm (3/16 x 5/16”) (internal/external diameter) 1.5m (5 feet) long to each of the bleed screws and hold it in place with hose clips. Place the vinyl hoses in a clean 20-litre (5 gallons) can to collect the bleed oil. In some cases, the oil may be able to be returned to the reservoir when the procedure is complete. TYPICAL CONFIGURATION OF AN ACTUATOR USED FOR ROTATING A WORK PLATFORM
WARNING Fluid projections: Contents under high pressure. Wear approved eye protection. Be careful when removing plugs and connections.
BLEED HOLES
ADVICE To avoid contaminating the wear parts: Be careful to work in a clean environment.
After installing the actuator on the equipment, it is important that the safety devices, such as the ties and safety cables, should have been reconnected correctly. To bleed the air from the hydraulic lines, connect them together to create a closed loop and use them to pump the hydraulic fluid. Consult the original manufacturer’s operating manual or hydraulic system diagram to determine which hydraulic lines must be connected. The length and the diameter of the hydraulic supply lines and the pump’s capacity determine the pumping time required to bleed the hydraulic system. Bleeding may be necessary if excessive rebound occurs after connecting the actuator to the hydraulic system. The original manufacturer does not specify all the actuators with bleed connections; please see their location on the drawing below. The procedure below is recommended when at least 8 litres (2 gallons) are being bled.
2. With an operator on the platform, open the two bleed nipples a quarter-turn. Turn the platform hydraulically up to the rotation end stop (in either direction, clockwise or counter-clockwise) and maintain the hydraulic pressure. Oil with tiny bubbles of air flows down the hoses. Bleed off at least 2 litres (0.5 gallon) of fluid from the actuator. 3. Keep the connections open and turn the platform in the opposite direction up to the end stop. Maintain the hydraulic pressure until an additional 2 litres (0.5 gallon) of fluid has been pumped into the receptacle. 4. Repeat steps 2 and 3. After bleeding off the last 2 litres (0.5 gallon), close both the bleed nipples before leaving the end stop position. 23
