SAF
– 4500
910101-000341 / 07.2019
Page 13 of 26
MAINTENANCE
General inspection
Initiate a flush cycle by closing the 1/4" valve at the low pressure sensing port of the pressure differential switch for 5 seconds.
Check that the exhaust valve opens, that the scanner moves properly, and when it reaches the limit switch - verify that the
exhaust valve closes.
Weekly maintenance:
1. Perform a general inspection as described above.
2. Clean the 3/4" filter connected to the exhaust solenoid. (Close the 3/4" valve and activate a flush cycle in order to release
pressure and then unscrew the filter bawl).
3. Check that there is grease on the drive shaft, and drive bushing. Add grease if necessary.
4. Check for any leakage from the scanner shaft. If necessary, replace the sealing nut internal O-ring (40)
Changing the sealing nut internal O-ring:
1.
Close the inlet valve to the filter and release the pressure.
2.
Remove the cover (35) from the drive shaft housing (14) by unscrewing the wing nuts.
3.
If the Suction Scanner is in the outer position, operate a flush cycle and bring it to the inner position.
4.
Remove the split pin (20) and pull out the connecting pin (19).
5.
Operate a flush cycle.
6.
Power down the unit when the drive shaft is half way through its cycle. The drive shaft is now separated from the suction
scanner.
7.
Unscrew the sealing nut (38).
8.
Remove the used internal O-ring and clean the O-ring seat.
9.
Insert a new O-ring (40)
10. Apply some grease on the external O-ring and on the shaft.
11. Tighten the sealing nut (38).
12. Re-connect the drive shaft to the suction scanner shaft.
13. Operate the control board and open the filter inlet valve.
Maintenance prior to long term shutdown (end of season):
The following must be done if the filter will not be in operation for longer than a month.
1. Perform a flush cycle (If possible, with a closed downstream valve).
2. Release pressure from the filter.
3. Power down the unit when the drive shaft is half way and none of the limit switches is pressed.
4. Disconnect the power supply to the control board.
5. Grease the drive shaft and the drive bushing.
6. Clean the 3/4" control filter.
7. Clean the coarse screen.
Maintenance prior to renewing filter operation:
1. Connect the control board to the power supply.
2. Check proper operation of the filter, especially noting proper rotation.
3. Grease the drive shaft and the drive bushing.
4. If necessary, change the sealing nut internal O-ring.
IMPORTANT!!
THE DRIVE SHAFT MUST BE LUBRICATED WITH HEAVY-DUTY, WATER RESISTANT GREASE THAT WILL NOT OXIDIZE. (SHELL,
DARINA EP-2 OR SIMILAR).
