Remove the Pump Head Assembly

When

Exchanging pump seals
Exchanging pistons
Exchanging seals of the seal wash option

Tools required

Qty.	p/n	Description
1	8710-0510	Open-end wrench 1/4-5/16 inch
1		Hexagonal key, 4 mm
1	5023-0240	Hex driver, ¼", slitted

Prerequisites

Switch off the pump at the on/off switch.

CAUTION

Damage of the pump drive

Starting the pump when the pump head is removed may damage the pump drive.

Never start the pump when the pump head is removed.

NOTE

Both pump head assemblies use the same internal components. In addition, pump head A is fitted with the purge valve. The following procedure describes the removal and disassembly of pump head A (left). For pump head B (right) proceed in the same way and skip steps that deal with the purge valve.