SKF P203 - Pumps with a Follower Plate; Display and Control Elements

16
3.2 Pumps with a follower plate
Fig.
4
P203 with a follower plate
1 Contact rod
2 Follower plate or double-
lip follower plate
In addition to the components shown, pumps with
follower plates also have the components described
below:
Follower plate
The follower plate is positioned on top of the lubricant
and presses it with spring force in the direction of the
pump elements. Its pressure improves the suction
characteristics of the pump.
Double-lip follower plate (with XBD reservoirs)
The two sealing lips of the double-lip follower plate
provide improved sealing for lubrication greases that tend
to separate under pressure. This prevents grease or oil
elements from penetrating into the space above the
double-lip follower plate.
Contact rod (with XBF reservoirs)
The contact rod of the follower plate houses the reed
contacts for the full and low-level signal functions. The
follower plate contains a magnet that activates a reed
contact when one of the switching points is reached. The
reed contact for the low-level signal is located at the
bottom switching point, and the reed contact for the full
signal is located at the top switching point.
Float switch (with YLBO reservoirs)
In reservoirs with lubrication oil, the signals indicating the
fill level of the reservoir are sent by a float switch.
3.3 Display and control elements
Fig.
5
Display and control elements of the control circuit board
1 Screw cap
2
Control circuit board
3
LED for power supply
4
Rotary switch for pause
time (blue)
5 Rotary switch for
lubrication time (red)
6
LED for operation
7
“Additional lubrication /
Reset fault” button
Screw cap for control circuit board
The transparent screw cap allows viewing of the LED
indicators (of operational and fault states) on the control
circuit board. The control elements (rotary switches for
setting the lubrication and pause times, button for fault
reset and additional lubrication) can be accessed by
removing the screw cap.
Control circuit board
The control circuit board is located behind the screw cap.
The control circuit board is equipped with an EEPROM.
This protects the control circuit board from data loss.