When

To install a replacement support ring after support ring removal

Parts required

  • Support ring

  • Pump head seals for reinstallation if necessary

Tools required

  • Screwdriver, Torx T30

  • Seal-handling tool

12123
Figure: Seal-handling tool (left: closed tool; right: open tool)

No.

Description

1

Removal pin

2

Insertion pin

3

Knurl for opening and closing the seal-handling tool
(opening and closing is required only when using the removal pin)

Parts affected on the pump head

124563
Figure: Support ring (here: for left piston)

No.

Description

1

Pump head

2

Support ring

3

Pump head seals (for seal wash plate and seal wash plate screws)

4

Seal wash plate

5

Screws, seal wash plate (4 screws)

6

Piston

Follow these steps

  1. Slide the support ring onto the insertion pin of the seal-handling tool.

1212
Figure: Sliding the support ring onto the insertion pin

No.

Description

1

Support ring

2

Insertion pin, seal-handling tool

  1. With the insertion pin, push the seal-handling tool into the pump head and remove the tool. The support ring remains in the pump head.

  2. Figure: Support ring installed (here: for left piston)
  3. Check that the pump head seals are correctly installed. If the seals came off or if they do not rest properly in the receiving grooves, reinstall the seals. See Installing the Pump Head Seals.

  1. Place the seal wash plate onto the pump head and insert the screws.

  2. Figure: Screws on seal wash plate (here: left plate)
  3. With the screwdriver, tighten the screws crosswise.

  4. Tighten the screws crosswise once again.

  1. Install the piston. See Installing the Pistons.

  2. Install the pump head. See Installing the Pump Head.