English
5.906-494.0 Rev. 01 (04/11)
13
–
Grease the inside of the motor shaft with copper
paste.
–
Grease the outside of the crankshaft with copper
paste.
Order no. copper paste (100g): 6.869-087.0
Loosen the two fastening screws of the overflow
(HD 25/15-4)
1 Valve screw, suction side
2 Fastening screws
3
Pressure switch
4 Valve screw, pressure side
Loosen the fastening screws.
Carefully pull out the cylinder head using both
hands.
The removed cylinder head
cross section seal setup, see pump diagram.
1 Crown nut
2 Disc
3 Low pressure seal
4 Support ring, low pressure seal
5 Support disc, brass
6 Disc
7 High pressure seal
8 Support ring, high pressure seal
9 Cylinder head
Always replace the entire set of seals.
Grease the low and high pressure seals generous-
ly with special silicone grease prior to installation.
Order no. silicone grease (100 g): 6.288-079.0
Unscrew the valve screws to remove the valve
cages.
Pull the valve cage out with a pliers.
5.4.3 Cylinder head, uninstall
