19
Pump head repair
CAUTION! It is important that the pistons are not pushed in
tilted at an angle, as this will reduce the service life of the
pump head.
Result
The pump head was repaired and reassembled.
Screwing the pump
head together
Process
Figure
1. Position piston guide
(A).
2. Insert screws with
Allen wrench (B).
3. Manually press the
piston guide (C)
down against the
compression springs.
4. Alternately screw in
the screws with a size
4 Allen wrench to 3
Nm, making sure
that no tilting or jam-
ming occurs.
Fig. 18
Mounting the piston guide
A
B
C
Inserting the piston
rod
Process
Figure
1. Carefully insert the
piston rods (A) indi-
vidually one after the
other by hand.
Fig. 19
Assembled pump head wit-
hout peripherals
A
