3660 and 3661 Positioners
September 2015
Figure 25. Fisher 3661 Positioner Assembly (continued)
SECTION B‐B
51B3945
Key
Description
R
51
Adhesive, Loctite
4210t Prism
(not furnished with positioner)
54
Self‐tapping screw, stainless steel (2 req'd)
55
Cover plate for 3661, A95052
56* Cover plate gasket for 3661, silicone
57
Hex nut, aluminum/chromate
58
Pipe plug, stainless steel
1 req'd for 3661 w/o output gauge option
2 req'd for 3660 & 3661 w/o instrument
and output gauge option
38
R
Instant Adhesive,
Key
Description
79
Wire tie for 3660 with bypass valve only,
plastic
95* O‐ring, EPDM
(2 req'd for 3660; 3 req'd for 3661)
96
Plain washer, stainless steel
97* Cover screw gasket, silicone (2 req'd)
98
Washer, stainless steel (4 req'd)
99
Flapper spring stop, stainless steel
100* I/P converter module for 3661
*Recommended spare parts
Instruction Manual
D101402X012