GMG-B Operation manual
Page 25 of 45
B0743
b) Bleeding the pump unit
Bleeding at the pump element
If no progressive distributor is attached, the pump needs to be switched on until the
lubricant leaves the pump elements‘ outlets free of air. Please note: Due to the
bigger distance to the filling nipple
4
, the bleeding of the right-side pump element
takes a little bit longer.
Bleeding at the pressure control valve or lock screw 1
(Version with progressive distributor 3)
On the connection casing
2
mounted in between the pump casing
5
and progressive
distributor
3
, a pressure control valve or lock screw
1
is installed.
a) Demount the pressure control valve or lock screw
1
.
b) Switch the pump on until the lubricant comes out of the connection thread free of
air.
c) Bleed the progressive distributor
3
:
Bleeding with additional filling nipple:
If available, screw the filling nipple (Order no. 752.502-91) into the open
thread and fill, by using a hand or filler pump, the distributor with lubri-
cant until it comes out free of air from all outlets of the progressive distri-
butor. Then remove the filling nipple and remount the pressure control
valve or lock screw
1
.
Bleeding without additional filling nipple:
Screw the pressure control valve or lock screw
1
in. Then switch the
pump on until the lubricant comes out free of air from all outlets of the
progressive distributor
3
.
2
1
4
3
5
1