Fisher 4195 KB Series Instruction Manual page 40

E-RING
(KEY 27)
RETAINING CLIP
(KEY 26)
PROPORTIONAL
BAND ADJUSTMENT
(KEY 25)
W4193 / IL
PROPORTIONAL
BAND
ADJUSTMENT
KNOB
SET POINT BEAM
BIAS SPRING
SHOE
ADJUSTMENT
SCREWS
SET POINT
BEAM ASSEMBLY
W4194 / IL
necessary, clean it. Also, inspect the plastic washers
and, if necessary, replace them.
15. Inspect the nozzle assembly O-ring (key 24) and,
if necessary, replace it.
Assembly
16. Apply a suitable lubricant, such as key 318 or
equivalent, to the set point beam assembly; then posi-
ADJUSTABLE
SET POINT
PIVOT ASSEMBLY
(KEY 17)
SET POINT
BEAM ASSEMBLY
(KEY 23)
FLAPPER
RETAINING
CLIP
E-RING
CAP
SET POINT
BEAM SHOE
Figure 5–3. Proportional Band Adjustment and Set Point Beam Details
4195KA, KB, and KC Series
RELAY
NOZZLE TUBING
PLASTIC
CAP
ASSEMBLY
WASHER
(KEY 18)
SET POINT
BEAM SHOE
(KEY 29)
LINK 3
tion a plastic washer (key 22) and the proportional
band adjustment knob (key 25) on the set point beam
assembly (key 23) as shown in figure 5–3.
17. Position the retaining clip (key 26) on the three
posts on the proportional band adjustment knob.
18. Place the second plastic washer on the nozzle
assembly. Apply a suitable lubricant, such as key 317
or equivalent, to the nozzle assembly O-ring.
WASHER
(KEY 20)
SCREW
(KEY 19)
O-RING
PLASTIC
WASHER
(KEY 22)
NOZZLE
ASSEMBLY
(KEY 21)
RELAY NOZZLE
TUBING ASSEMBLY
5–7