SSI America 90-2581 REV B Changing the Piston, Condition the new seal as described in Section

2.Place a self-flush replacement seal on the seal insertion/removal tool so that the spring in the seal is visible when the seal is on the tool. As in the previous step, insert the tool and seal into the seal cavity on the flushing housing, taking care to line up the seal with the cavity, and then withdraw the tool. When the seal is fully inserted only the polymer part of the seal will be visible in the seal cavity.

3.Place seal back-up washer over the high-pressure seal. Place seal back-up plate back into pump housing if it was removed. Orientation is not important in these cases.

4.Attach the pump head as described in Section 5.2.5. Use caution so as not to damage the sapphire piston.

5.Condition the new seal as described in Section 5.3.

5.2.4 Changing the Piston

1.Remove the pump head as described in Section 5.2.1. Use caution so as not to damage the sapphire piston.

2.Grasp the metal base of the piston assembly so that you avoid exerting any side load on the sapphire rod, and remove the piston from the slot in the carrier by sliding it up.

3.Grasp the metal base of the replacement piston assembly, and insert it into the slot in the piston carrier until it bottoms in the slot.

4.Attach the pump head as described in Section 5.2.5. Use caution so as not to damage the sapphire piston.

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