GMG-LEZ Operation manual
Page 16 of 37
B0840
4.4 Pump elements
4.4.1 GMG-LEZ Pump elements
The pump elements of the GMG-LEZ unit are hooked into the eccentric shaft.
During suction stroke, the delivery piston (2.1) is moved into the direction of the eccentric
shaft (3). In such motion, the lubricant being available in the reservoir (1) is drawn through
the suction hole (2.3) into the metering chamber (2.4).
During delivery stroke, the eccentric shaft (3) displaces the delivery piston (2.1). Thereby, the
suction hole (2.3) is closed and the lubricant volume being available in the metering chamber
(2.4) delivered through the check valve (2.5) to the outlet (2.6).
The 0.11 cm³ delivery volume pump element is marked by a green ring R, whereas the
0.04 cm³ delivery volume pump element is marked by a white ring R.
4.4.2 Relief valve
The relief valves of the GMG-LEZ unit are hooked into the eccentric shaft.
The check valve (2.5) is getting pushed by the relief piston (similar 2.1). Thereby the
pressure of the pressure line drops
Delivery stroke:
Suction stroke:
2.1
2.3
2.4
2.5
2.6
