TECHNICAL MANUAL MT103
55
DISASSEMBLING THE 204/A PILOT (FIG. 30)
2)
Slacken the lock nut .
3)
Slacken the adjustment screw for its complete stroke by turning it anticlockwise.
4)
Remove the pilot plug .
5)
Remove the spring support , the spring and the spring support from the pilot.
6)
Slacken the screw and remove the sleeve and the pilot bracket .
7)
Unscrew the lock nut, and remove the protection disc and the bottom diaphgram
.
8)
Slacken the screws and remove the pilot cover along with the spring .
9)
Unscrew the pilot nut and remove the spring , the pilot obturator , the protection disc
and the top diapragm .
10) Unscrew the lock nut from the valve seat .
11) From the pilot body remove the shaft of the valve seat along with the diaphragm support .
12) Clean and carefully check that the valve seat is in good condition.
13)
Replace all the components which are part of the spare parts kit.
REASSEMBLING THE 204/A PILOT
14) On the pilot body , reassemble the shaft of the valve seat , putting the diaphragm support
between them.
15) Screw and tighten the nut .
16) Reassemble the bottom diaphragm , and the protection disc and screw in the pilot lock nut .
17) Insert the pilot obturator , the spring , the top diaphragm and the protection disc .
18) Screw in the pilot nut .
19) Check and centre the diaphragm support .
20) Reassemble the pilot cover along with the spring and fix the screws .
21) Reassemble the sleeve and the pilot bracket on the pilot body and secure it by screwing in the
screws mm.
22) Position the spring support , the spring ,and the spring support and fix the pilot plug
.
DISASSEMBLING THE R14/A PRE-REGULATOR (Fig.30)
23) By slackening the screws , remove the cover , from the pre regulator body .
24) Remove the diaphragm obturator assembly and the spring .
25) Separate the diaphragm assembly and obturator , by unscrewing the lock nut .
26) Unscrew the pre-regulator plug .
9
10
8
7
22
6
14
24
24
25
5
15
16
1
20
2
21
17
16
13
25
4
3
5
3
4
3
5
25
5
16
15
25
17
21
16
15
18
22
20
1
24
4
14
6
24
13
7
8
5
12
10
5
4
1
2
| [email protected] | Phone: 877.566.3837 | Fax: 925.407.2903
