When

To replace the pump head seals

Tools required

  • Screwdriver, Torx T30

  • Tweezers

Preparations

  1. Remove the pump head. See Removing the Pump Head.

  2. Remove the pistons. See Removing the Pistons.

Parts affected on the pump head

123456
Figure: Pump head seals (here: left side of pump head)

No.

Description

1

Pump head

2

Pump head seals, for seal wash plate screws (O-ring seals 6.5x1)

3

Pump head seal, for seal wash plate (O-ring seal 11x1.5)

4

Seal wash plate

5

Seal wash plate screws

6

Piston

Follow these steps

Recommended: Replace all pump head seals of the pump head at the same time (left side and right side of pump head).

  1. With the screwdriver, remove the screws on the seal wash plate.

  2. Figure: Screws on seal wash plate (here: left plate)
  3. Remove the seal wash plate from the pump head.

  1. Remove all pump head seals. Using tweezers facilitates the procedure.

11112
Figure: Pump head seals (here: left side of pump head)

No.

Description

1

Pump head seals, for seal wash plate screws (O-ring seals 6.5x1), resting in the pump head

2

Pump head seal, for seal wash plate (O-ring seal 11x1.5), resting in the seal wash plate, side facing the pump head