USER MANUAL
30
DESOI GmbH | Gewerbestraße 16 | D-36148 Kalbach | Phone +49 6655 9636-0 | Fax +49 6655 9636-6666 | [email protected] |
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Fig.7.5.12
Fig.7.5.13
Fig.7.5.14
6.
Replacing the valve core
(Fig.7.5.12
–
7.5.14)
(Step 1)
Remove valve housing from pump housing.
(For procedure see Checking / Replacing the Piston Seal)
(Step 2)
Clamp the complete outlet valve securely in a vice. Possible clamping surfaces
(see Fig.7.5.13 marked in
blue)
(Step 3)
Heat the valve housing in the area marked red and
unscrew the valve seat
with an Allen key (
ideally with T-
handle).
(Step 4)
Allow the housing to cool down and clean thoroughly in the area of the valve insert.
(Step 5)
Apply a sealant to the new valve insert in the threaded area and the lower plane surface.
Manufacturer's recommendation:
Use WEICON Lock 305-77 yellow or Loctite 577 yellow.
(Step 6)
Screw the valve seat into the housing and tighten it.
(Step 7)
Remove excess sealant from the housing. (
Consider curing time of the sealant
used
)
7.
(Fig.7.5.12)
Reinstall all disassembled components. Note that the pressure measuring unit (4) and the
pressure control unit including return (3) must also have sealant applied to them. It is important to pay
attention to the position. Sealing components should be greased with conventional multipurpose lubricant
prior to assembly.
Checking / maintaining the pressure measuring unit
Fig.7.5.15
1.
Unscrew the threaded pin (8) and move the pump body to a vertical
position.
2.
Unscrew the pressure gauge (1) using the wrench. Remove residues
of the Teflon sealing tape and remove the two screws (2 & 3). Hold
the entire valve in place where the housing is marked in red.
3.
Let hydraulic oil run out of the pressure measuring unit and dispose
of it properly.
4.
Unscrew the cap (4) using the wrench, keeping the valve in position
over the area marked in red.
5.
Remove O-ring (5) washer (6) and the diaphragm from the housing.
6.
Remove any residue from the housing.
7.
Assembly of the pressure measuring unit:
(Fig.7.5.15)
(Step 1)
Fill the hole in the connection area of the pressure gauge with hydraulic
oil, using a syringe with a suitable cannula.
(Step 2)
Insert the diaphragm (
7
) washer
(
6) and the O-ring
(
5) back into the
housing.
(Step 3)
Lubricate the sealing surface in the threaded area of the closure, screw it
into the housing and tighten.
(Step 4)
Check the position of the diaphragm which must have a downwards
curvature, but must otherwise have no obvious deformations.
Fig.7.5.16
➔