Fresenius Medical Care 2008k Technical Manual page 205

3. Carefully remove the end plate to reveal the input and output nozzles,
springs, seals and O-rings.
4. Replace the inlet and outlet springs.
U
Caution: Be certain the correct springs are used on concentrate pumps.
See Figure 9 on previous page.
5. Inspect the seals. Replace them if there is any sign of swelling or wear.
6. Inspect the O-rings. Replace them if there is any sign of wear.
7. Reassemble the pump as follows:
• The outlet seal goes toward the pump membrane.
• The inlet seal faces away from the pump membrane.
• Reinstall the spacer in the outlet nozzle if one was removed from
the pump.
• Ensure the outlet nozzle is oriented so it will be at the top of the
pump solenoid to help avoid air locks in the pump.
8. Replace the long screws into the end plate and tighten.
9. Replace the pump in the machine and reconnect the electrical and
hydraulic lines. Orient the pump so the outlet nozzle is above the inlet
nozzle to help avoid air locks.
Fresenius 2008K Preventive Maintenance Procedures
P/N 507297 Rev. A
Page 43