
GMG-K / GMG-L Operation manual
Page 18 of 58
B0793 / B0796
4.5 Pump elements
4.5.1 GMG-K pump elements
The pump elements of the GMG-K unit are provided with a spring reset.
During suction stroke, the pressure spring (2.2) moves the delivery piston (2.1) against 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 0.16 cm³ delivery volume pump element is marked by a black ring R, whereas the 0.04
cm³ delivery volume pump element is marked by a white ring R.
4.5.2 GMG-L Pump elements
The pump elements of the GMG-L 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.