Technical data

Overhaul

Assembling the cylinder head

11. Clean the cylinder head. If the water distribution

pipe has been disassembled, it must be installed with

the holes turned as indicated in the picture. Install new

valve stem sealings. Oil the valve stems and install the

valves. Make sure to install the valves and the valve

springs in their respective original positions. Install the

valve springs and the “collets”. Use a valve-bow.

Feed-pump

13. Depress the pump lever. If the diaphragm of the

pump sounds squeaky, the diaphragm is faultless.

Changing the diaphragm

14. Remove the six screws, holding the upper and low-

er pump housings together. Remove the pump lever

spring (1) and remove the screw (2) holding the pump

lever shaft.

Reduction valve

12. Remove the cover of the reduction valve and check

to make sure that the spring and the piston are fault-

less. If there are reasons to suspect a fault in the open-

ing pressure of the reduction valve, then check the data

of the spring. See under “Technical Data” - reduction

valve.