PIETRO FIORENTINI HBC 975, Manual

Page: 107 / 156

107
HBC 975
Use, maintenance and warning manual
SLAM-SHUT VALVE | MAINTENANCE AND FUNCTIONAL CHECKS | REV. 00
EN
Step Action
1 Remove the knob (9).
2
Undo and remove the screws (15).
3 Remove the lid (2) together with the bush (4), spring (13), plug (12) and stem (8).
4 Remove the bush (4), together with the spring (13), plug (12), stem (8) from the lid (2).
5
Remove the O-ring (22) from the lid (2) and replace it, taking care to lubricate it with synthetic grease.
NOTE!
Before inserting the replacement O-ring, clean the retaining slots with a cleaning solution.
6 Fit the plug (12) together with the stem (8).
7 Separate the stem (8) from the plug (12).
8 Insert the plug (12).
9
Remove the O-rings (20, 21, 24) from the bush (4) and replace them, taking care to lubricate them with syn-
thetic grease.
NOTE!
Before inserting the replacement O-rings, clean the retaining slots with a cleaning solution.
10
Undo and remove the screws (6).
NOTE!
Attention do not to ruin the seat profile during this step.
11
Remove the O-ring (21) from the seat (6) and replace it, taking care to lubricate it with synthetic grease.
NOTE!
Before inserting the replacement O-ring, clean the retaining slots with a cleaning solution.
12 Undo and remove the screws (14).
13 Remove the flange (3).
14
Remove the O-rings (22 , 23) from the flange (3) and replace them, taking care to lubricate them with synthetic
grease.
NOTE!
Before inserting the replacement O-rings, clean the retaining slots with a cleaning solution.
15
Remove the O-rings (20) from the flange (3) and replace them, taking care to lubricate them with synthetic
grease.
NOTE!
Before inserting the replacement O-rings, clean the retaining slots with a cleaning solution.
16 Remove and replace the filter (11).
17 Put the flange (3) back in place.
18
Insert and fix the screws (14) according to the following tightening torque:
• HP2/2 > tab. 9.55.
NOTE!
Tighten the screws according to the cross diagram in paragraph 9.4.2.2.