Technical data

Simple Maintenance 39

3.3 Pump head screws 3.15 Springs

3.4 Housing 3.17 Piston rod

3.5 Bushing, inlet 3.18 Retaining plate

3.6 Bushing, outlet 3.19 Retaining plate screws

3.10 Check valves, inlet and outlet 3.20 Pressure disc

3.10a Distance holder 3.21 O-ring

3.11 Piston seal, high pressure 3.22 Capillary connection

3.11a Piston seal, low pressure 3.23 Screw connection of backflush

3.12 Seal holder (titanium) 3.24 Capillary of backflush

3.13 Pressure plate

3.14 Spacing bolts

Fig. 30 Explosion view of the pump head

3.4

3.20

3.13

3.12

plane areas

180°

3.11

3.11a

3.4 Housing 3.13 pressure plate

3.11 piston seal 3.11a piston seal

3.12 seal holder 3.20 pressure disc

Fig. 31 Parts of the opened pump head

SOP 30 Assembling the pump head

All position numbers of the items described refer to Fig. 30 and Fig. 31.

1. Always exchange the piston seals (item {3.11} and {3.11a}) after

disassembly of the pump head. Exchange the O-rings (item {3.21})

only if necessary.

2. If you have removed the seal holders from the housing, replace

them very carefully with the plane sides facing each other.

Otherwise the seal holders cannot be replaced without damaging

them.