4660 Pressure Pilot
Instruction Manual
Form 5200
September 2004
14
7. Refer to the alignment of the nozzle beam
procedure in the Operating Information section.
8. Replace the case cover, and attach it with the
case cover screw.
9. Reset the high and/or low set points according to
the procedures presented in the Operating
Information section.
Low or High Set Point Assembly
Replacement
Obtain the set point assembly listed in the parts kit
section, then perform one or the other of the
following procedures.
Pilots Without Set Point Indication
Note
New locking wedges (key 71) must be
installed when performing this
procedure. Refer to the parts list
section and obtain the correct
quantity. Two are required for low or
high versions. Four are required for
high-low versions.
1. Perform steps 1 through 4 of the Bourdon
tube/flapper assembly replacement procedure.
2. Remove the knob (key 67) by loosening the knob
set screw and pulling it away from the front plate
(key 74).
3. Remove the locking disk (key 69) and the locking
nut (key 70).
4. Remove the screws (key 68) and the switch point
assembly.
5. Remove the locking wedges (key 71).
6. Install the new set point assembly and tighten the
screws.
7. Install new locking wedges over the set point
stem.
8. Apply lubricant (key 81) to the locking nut threads
and install it finger-tight.
9. Tighten the locking nut to 5.6 N
S
m (50 lbf
S
in) of
torque. Back the nut out one-quarter turn.
10. Re-tighten the locking nut to 1.1 N
S
m (10 lbf
S
in)
of torque.
11. Install the knob on the stem and tighten the set
screws. Attempt to rotate the knob. If the knob
rotates, repeat steps 9 and 10.
12. Loosen the set screws and remove the knob.
13. Repeat steps 1 through 12 if both set point
assemblies are to be replaced on a high-low version
of the pilot.
14. Install the front plate and the panel mounting
plate (if required).
15. Install the locking disk(s) with the tab(s) as close
to 90 degrees to the right of vertical as possible.
16. If the locking disk(s) cannot be installed as
described in step 15, install the tab(s) between
vertical and 90 degrees, rather than beyond the 90
degree position.
17. Perform steps 6 through 11 of the Bourdon
tube/flapper assembly replacement procedure.
Pilots With Set Point Indication
1. Perform steps 1 through 4 of the Bourdon
tube/flapper assembly replacement procedure.
2. Remove the set point indication module by
loosening the set screws that attach the module to
the set point assembly stem, and pulling it away
from the front plate (key 74).
3. Remove the screws (key 68) and the set point
assembly.
4. Install the new set point assembly and tighten the
screws.
5. Repeat steps 2 through 4 if both set point
assemblies are to be replaced on a high-low version
of the pilot.
6. Install the front plate and the panel mounting
plate (if required).
7. Align the three posts on the set point indication
module(s) with the three holes on the front plate.
8. Push the set point indication module(s) flush with
the front plate and tighten the set screws. Do not
overtighten the set screws.
9. Perform steps 6 through 11 of the Bourdon
tube/flapper assembly replacement procedure.
