ANDERSON GREENWOOD
TyPE 95 POSRV
MAINTENANCE INSTRUCTIONS
Copyright © 2013 Pentair
ANGMC-6026-US-1312
page 5
Engineering Doc. #05.9040.083 Rev. E
4.0 PILOT MAINTENANCE (REFER TO FIGURE 4A)
Anderson Greenwood recommends the pilot be returned to the factory for repair or to
be repaired by a factory serviceman in the field.
Normal maintenance is to completely disassemble the pilot and replace all the
diaphragms, seals and seat. To facilitate assembly, place all parts removed in an
orderly arrangement so that the correct parts are assembled in the proper sequence.
No lubricants are required in the pilot. A small amount of thread sealant should be
used on the pipe threads to prevent leakage. Teflon
®
tape is recommended.
Assembly is done in the reverse order of the disassembly. The following items should
be observed when assembling the pilot:
• The round metal diaphragm is the sense diaphragm. The clear teflon diaphragm is
the boost diaphragm.
• The holes in the spindle diaphragm must be aligned with all the holes in the body.
The small hole in the lower case must be aligned with the hole in the body.
• Two of the six case bolts must be assembled through the holes in the lower case
before it is attached to the body. After attachment there is insufficient clearance to
do so.
• Tighten the spindle nut snugly but not excessively. Three diaphragms are
sandwiched in the spindle/stack assembly and excessive tightening will damage
them. Hold the hex spacer when torquing the spindle nut to prevent the stack
from rotating.
After the pilot is assembled the set pressure must be adjusted. Refer to Section 5.0
for instructions.
Refer to Page 10 for Soft Goods Repair Kits Part Numbers.
ITEM
DESCRIPTION
100
Body
110
Nozzle
120
Hex spacer
130
Boost spacer
140
Sense spacer
150
Sense plate
160
Boost plate
170
Spindle spacer
190, 190A
Pressure adjuster lock nut
200, 200A
Bonnet assembly
(1)
210
Upper diaphragm case
220
Lower diaphragm case
230
Spacer ring
235A
Adapter
240
Case bolt
250
Lock washer
260
Hex nut
320
Boost tube
330
Connector elbow
340
Body bolt
350
Blowdown needle
370
Hex jam nut
For Figures 4A and 4B
ITEM
DESCRIPTION
380
Retainer plug
390
Blowdown bushing
400
Filter screen (not shown)
420
Retainer seat
430
Retainer ring
440A Hex nut
450
Bonnet insert
(1)
460
Wire (not shown)
470
Seal –
1
/
2
" diameter (not shown)
490
Washer shim (for stack height)
500
Spindle diaphragm*
510
Sense/boost diaphragm*
520
Sense diaphragm*
550
Spindle
555A Extension rod
560
Check plate
570
Seat
580, 580A Bonnet gasket*
610
Body bolt seal*
620
Blowdown seal*
630
Bushing seal*
640
Case gasket*
ITEM
DESCRIPTION
660
Spindle seal*
680
Spindle gasket*
690
Spindle diaphragm gasket*
730
Seat base – Type 95
740
Ball
750
Hex nut
760, 760A
Cap
770, 770A
Bonnet bolt
780
Lock washer
790, 790A
Pressure adjustment screw
800
Vent – body (not shown)
805A
Vent – plug
810
Vent – connector
815
Vent – tube
820, 820A
Spring washer
830, 830A
Spring disc
840, 840A
Spring
A = Used in Auxiliary Setter
*
Recommended spare parts for repairs
(1) Part of Item 200 Assembly
