COMPARTMENT - MOT SEAT 9EL7881 - Caterpillar

Illustration 1 g01516213
(1) Cartridge
(2) Inspection window
(3) Lubricant fitting
(4) Pump element
(5) Pressure limiting valve
(6) Outlet for pressure relief of lubricant
(7) Eccentric shaft
(8) Lateral relief hole
(9) Throttle
(10) Hydraulic motor The lubrication pump is hydraulically actuated. The pump is used to lubricate the hammer. The pump is designed to be mounted on the housing of the hammer.The hydraulic supply line for the pump is connected to the inlet side of the hammer. The hydraulic return line for the pump is connected to the outlet side of the hammer. The lubricant supply line is connected to port (G) on the valve housing of the hammer.The supply line and the return line for the lubricant pump must be connected to the hammer's hydraulic system via a bypass line.When the auxiliary circuit for the hammer is activated, hydraulic oil is supplied to hydraulic motor (10). The hydraulic oil is returned to the system through the outlet port of the pump.The speed of the hydraulic motor is controlled by throttle (9). Hydraulic motor (10) rotates eccentric shaft (7). Eccentric shaft (7) rotates in order to force pumping element (4) to move lubricant from cartridge (1) to the outlet port on the pump. The rotation of the eccentric shaft can be verified by looking through the sight glass that is located on the front of the pump.The lubricant pump is equipped with pressure relief valve (5). The valve opens if the outlet port is blocked or the line to the hammer is pinched. The relief valve opens at 280 bar (4060 psi). Lubricant will exit the pump at the outlet for pressure relief valve (6).Cartridge (1) holds the lubricant for the pump. The level of lubricant is indicated by a red piston inside the cartridge. When the piston is visible in inspection window (2), the cartridge must be replaced.Lubricant will exit the pump through the lateral relief hole (8) when pumping element (4) needs to be replaced.