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Maintenance by the user
Removing and checking piston rods
SOP 7
Disassembling the pump head
SOP 8
3.
Use a hexagonal spanner no. 3 (3mm) to loosen just two
diagonally opposed head set screws, item 3.3. Remove the
screws.
4.
Loosen the two remaining screws carefully, alternating from
one to the other, approx. half a turn. This prevents the pump
head from tilting and becoming damaged.
5.
Once the spring tension has been reduced, hold the pump
head firmly in one hand while removing the screws
completely with the other hand.
6.
Remove the pump head carefully.
Removing and checking piston rods
1.
Remove pump head as described in SOP 6 Removing the
pump head. If you only wish to check the piston rods, you
don't need to disassemble the pump head any further.
2.
Any piston rod, item 3.17 in Fig. 9 on page 18, may be
removed using pliers. Take the tip of the piston using the
pliers, and pull it out carefully in a straight line.
If one of the rods is broken, the entire pump head needs to be
checked for damage.
Disassembling the pump head
All position numbers of the components are related to Fig. 9 on
page 18.
1.
Apply SOP "Removing and checking piston rods" on page
17.
2.
Loosen the two retaining plate screws, item 3.19 half a turn,
alternating from one to the other to avoid damage the
retaining plate. Because the two screws are very tight, it may
be useful to either clamp the pump head or to press one of
its side surfaces against a table with one hand while
loosening the screws.
3.
Unscrew the two screws strictly alternating due to strong
force of the springs, item 3.15 behind the plate, and remove
them.
4.
Remove the retaining plate, item 3.18.
5.
Remove the spring guide 3.16 and the springs 3.15.
6.
Use a SW 5/16 spanner to loosen the spacing bolts, 3.14.
These bolts are seated very tightly. Follow the advice given
in step 3.
7.
Remove the pressure plate, 3.13.
8.
Remove the pressure discs 3.20 out of the pressure plate
3.13.
17
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