Change the Water Filter Cartridge and Inspect O-ring

The water filter removes debris from the incoming water. See the Maintenance Schedule for the recommended frequency for this task.

1. Turn OFF the machine.

Figure 487  

2. Disconnect the power cord from the electrical outlet.
3. Turn OFF the water supply.
4. Ensure there is no pressurized water in the high-pressure lines.
a. Open the lid and lock it in the upright position.

Use care when opening or closing the lid to avoid injury. Never let the lid free-fall. Keep hand, fingers, or body parts away from the side of the table when closing the lid.

b. Loosen the gland nut [1] to release the pressure; water can leak from the inlet body weep hole.

Figure 488  

c. Tighten the gland nut [1].

Figure 489  

5. Remove the water filter housing [1].

Figure 490  

6. Remove and discard the filter element.
7. Wash and rinse the filter housing to remove all sediment and coatings from inside the filter housing.
8. Inspect the filter housing O-ring [1] for damage and replace it if needed (Figure 491).
9. Apply a light coat of silicone to the filter housing O-ring [1], then insert it into the water filter housing.

To prevent leaking, do not twist or bind the O-ring.

Figure 491

10. Place the new filter element [1] into the filter housing [2].

The filter element is bi-directional and can be installed in either direction.

Figure 492  

11. Install the lower filter housing assembly to the upper filter housing and hand-tighten.

Do not tighten the filter housing with the water filter wrench. Damage to the filter housing or filter housing O-ring can occur and can cause leaks.

12. Turn ON the water supply.
13. Place a rag over the top of the filter, then hold down the air bleed button [1] to release air from the filter.

If all of the air is not purged from the filter, the pump cannot develop sufficient pressure, and the pump shuts down.

Figure 493  

14. Reset the pump to recalibrate the pump pressure.
15. Verify the water pressure when the pump is running.