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Manual operation
SKF Maxilube pumping centre can be operated by a manual procedure in the event of an electrical malfunction or when
commissioning before electrification. Pressurise the system by using the manual control screws of the pumping centre's
solenoid valve group (Fig. 3).
If the system is channelled with shut-off valves, the shut-off valve of the channel to be pressurised must be before the
pressurisation of the piping so that the lubricant can be distributed to the lubrication points downstream the shut-off valve.
See SKF CLV-2 shut-off valve.
Electric shock
Ensure that the pumping centre/control centre is turned off during manual operation. Power
must be turned off before any work involving the handling of conductive parts or the
opening of
any pos. of the system or product.
A lubrication cycle is performed in manual operation as follows (Fig. 3)
1. Turn the manual control screw of solenoid valve MV1 90° clockwise so that the control valve will direct the
pressure to line 1.
2. Turn the manual control screw of solenoid valve MV3 90° clockwise as well: the pump will start.
3. When the pressure reading in line 1 pressure gauge of the pumping centre has increased to 200–250 bar
(3,000–3,600 psi), turn the manual control screw of solenoid valve MV3 to its initial position (90° counter-
clockwise). This will stop the pump.
4. Let the pressure act in line 1 for a couple of minutes so that all the dosers have sufficient time to operate.
5. Turn the manual control screw of solenoid valve MV1 to its initial position (90° counter-clockwise). This will
discharge the pressure from line 1.
6. Line 2 can be pressurised after the pressure reading has fallen below 50 bar (700 psi) in the pressure gauge of
the line 1 pressure control unit.
7. Turn the manual control screw of solenoid valve MV2 90° clockwise so that the control valve will direct the
pressure to line 2.
8. Turn the manual control screw of solenoid valve MV3 90° clockwise as well: the pump will start.
9. When the pressure reading in line 2 pressure gauge of the pumping centre has increased to 200–250 bar
(3,000–3,600 psi), turn the manual control screw of solenoid valve MV3 to its initial position (90° counter-
clockwise). This will stop the pump.
10. Let the pressure act in line 2 for a couple of minutes so that all the dosers have sufficient time to operate.
11. Turn the manual control screw of solenoid valve MV2 to its initial position (90° counter-clockwise). This will
discharge the pressure from line 2.
12. If necessary, line 1 can be repressurised after the pressure reading of the line 2 pressure control unit has fallen
below 50 bar (700 psi).
13. Repeat the steps 1–5.
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