Repair
66
WBV.PU.002.EN VX215QD V2.0
9.6.2
Cartridge mechanical seal change on the QD cover
Fig.
“Cartridge mechanical seal on the QD cover”
1.
Reduce the pressure in the two buffer chambers if necessary
Chap.
“Buffer chamber”.
2.
Drain and clean the buffer chamber on the QD cover
Chap.
“Draining and cleaning the buffer
chamber”.
3.
If present, dismount the locking screws or flushing connectors for the circulation system
Chap.
“Circulation system on the cartridge mechanical seal” and
Fig.
“Flushing operation”.
4.
Follow the steps specified in
Chap.
“Opening the QD cover”.
5.
Undo the hexagon head bolts (1) and remove the wear plate (2).
6.
Remove the retaining rings (3), seal carriers (5) and O-rings (4, 6).
7.
Remove the slotted set screws (7).
8.
Put on tool (A) and screw the cylinder head bolts (8) into the extracting boreholes of the cartridge
mechanical seal.
9.
Pull out the cartridge mechanical seal evenly using the three hexagon head bolts (9) of the tool (A).
10.
Place washer (13) on threaded rod (14) with self-locking hexagon nut (15) and push it through the
bearing cover.
11.
Change O-ring (12) in the bearing seal housing.
12.
Clean cartridge mechanical seal in the QD cover.
13.
Insert new cartridge mechanical seal (11).
14.
If a circulation system is present, the flushing connector boreholes in the cartridge mechanical seal
must be aligned with the flushing connector boreholes in the QD cover.
15.
Put on tool (C) with the large internal turning facing the cartridge mechanical seal.
16.
Insert tool (B) in tool (C).
17.
Slowly tighten the cartridge mechanical seal by tightening the hexagon nut (10).
18.
Remove tools (B) and (C).
19.
Reinstall any removed locking screws or flushing connectors.
20.
Assemble seal carriers (5), O-rings (4, 6) and retaining rings (3).
21.
Remove hexagon nut (10), washer (13) and hexagon head bolt (14).
22.
Install wear plate (2).
23.
Close the QD cover as per
Chap.
“Closing the QD cover”.
24.
Top up buffer or quenching fluid.
25.
Readjust the pressure in the two buffer chambers if necessary
Chap.
“Buffer chamber”.