Operating manual High-pressure double diaphragm pumps Cobra 40-10; Cobra 40-25
8 Cleaning and Maintenance
Order number 2340851 | Edition 05/2022 49
2. Empty the pump in a controlled manner in accordance with Chapter Emptying Pump
[844].
3. Place the grounded collection tank under the high-pressure filter.
4. Open ball valve (1).
5. Loosen union nut (3) with a size 70 wrench.
6. Unscrew the union nut (3) and lift slightly so that it does not get dirty in the next step.
7. Remove the filter housing (2) with the union nut (3). The cone spring (12) remains in the
filter housing (2). If the O-ring (5) is not damaged, it remains on the filter housing (2).
8. Remove the filter cartridge (11) and filter socket (10) from the filter housing (2).
9. Clean all parts:
4 Place the filter cartridge (11) and filter support (10) in solvent. Clean using brush.
4 Fill the filter housing (2) approx. 1/3 full with solvent. Close, wearing a glove, and
shake well.
4 Clean the distribution housing (7) using a brush.
10. If necessary, replace the O-ring (5) and/or filter cartridge (11). Order no., see Chapter
High-pressure Filter, 530 Bar [885].
11. Assemble all parts in reverse order.
While doing so:
4 Coat the thread of the distribution housing (7) with anti-seize paste**.
4 Coat the O-ring (5) and pressure ring (21) with Mobilux® EP2**.
4 Observe the installation position of the filter cartridge (11): Push the closed end
with the filter identification ahead into the filter housing (2).
4 Make sure that the cone spring (12) is in the filter housing (note the installation
position). Press on the cone spring after inserting the filter cartridge (11) and filter
support (10); the spring action must be noticeable.
4 Tighten the union nut (3) by hand.
12. Close ball valve (1).
13. Fill the pump in accordance with Chapter Filling the Empty Pump [845].
** Order no., see Chapter Assembly of the Device [857]
8.2.9 Hydraulic Stage Maintenance
Partially disassemble the device on the frame, as shown in the figure, and turn it upside
down. Observe the fill level marking X on the oil tank.
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