FEBCO Service Procedures

1
FEBCOService Procedures

• Models
• 805Y, 805YD, 806YD
• 825Y, 825YD, 826YD
• 850, 856, 870V, 876V
• 860, 880, 880V
• 830, 831

2
Contents

• Model
• 805Y, 825Y ¾-2
• 805YD, 806YD 21/2-10
• 825YD, 826YD 21/2-10
• 830, 831 4-6
• 850 ½-2
• 860, 880 ½-2
• 850, 856, 870V, 876V 21/2-10
• 860, 880V 21/2-10

• Page
• 2
• 10
• 10
• 19
• 24
• 24
• 34
• 34

3
805Y,825Y 3/4-2
4
Modification Overview

• The 825YA has angled inlet and outlet valves.
• The 825YR has replaceable check seats.
• The 825YS has silicone rubber parts.
• The 805Y was discontinued in 2003.
• The 805YB is still used as a bypass assembly for
  certain models of DCDA.

5
Check Cover Removal

• Cover is threaded into body and o-ring sealed.
• Cover is spring loaded.
• Loosen cover with wrench, then remove by hand
  while holding tightly against spring pressure.

6
Check Valve Removal

• Poppet style check valve.
• The poppet and spring are free once the cover is
  removed.

7
Check Seat Removal

• Earlier models of the 825Y do not have
  replaceable seats.
• Current models that start with a J serial
  have replaceable seats.
• 825YR has replaceable seats.
• Seats are threaded and o-ring sealed.

8
Check Disc Replacement

• Remove screw and disc washer from poppet.

9
Check Valve Reassembly Notes

• Inspect and clean the guide bore on the cover.
• The stem must move freely in the guide bore.
• Reassemble in reverse order.

10
RV Cover Removal

• RV cover is sealed by the diaphragm.
• Spring load is contained.
• Carefully remove sensing port bushing.

11
RV Module Removal

• Module is o-ring sealed.
• Pull module straight out of body.

12
RV Seat Removal

• Replaceable RV seats only standard on units
  manufacturer after 1988.
• RV seat is threaded and o-ring sealed.
• Loosen the allen bolts and remove RV body.
• Remove discharge shield.
• Use socket or pliers to unscrew.

13
RV Seat Replacement Notes

• Reassemble in reverse order.
• Make sure port bushings and discharge shield is
  in place.
• Lubricate o-rings.

14
RV Disc Replacement

• Remove screw, disc washer, and disc.

15
Disassemble RV Module

• Module is spring loaded.
• Hold module firmly and remove button screw.

16
Disassemble RV Module

• Push the main stem through the guide.
• Remove the main stem o-ring.

17
RV Reassembly Notes

• Reassemble in reverse order.
• Lubricate the guide
• o-ring.
• Push the RV module straight into body.

18
RV Reassembly Notes

• Make sure sensing port bushing is in place.
• Position the diaphragm on the cover and tighten
  bolts.

19
805YD,806YD, 825YD, 826YD21/2-10
20
Modification Overview

• 805Y- (1973-1988) Cast Iron body- Threaded in
  seats- Internal check parts are epoxy coated
  iron.
• 805YD- (1988-present) Ductile iron body- Bolted
  in seats- Internal check parts are stainless
  steel.
• 825- (1975-1988) Cast iron body- Threaded in
  seats- Internal check parts are epoxy coated
  iron. Old style RV.
• 825D- (1988-1989) Ductile iron body- Bolted in
  seats- Internal check parts are stainless steel.
  Old style RV.
• 825YD- (1989-present) Ductile iron body- bolted
  in seats- Internal check parts are stainless
  steel. New style RV.

21
Check Cover Removal

• Cover is o-ring sealed.
• 21/2-3 cover is spring loaded.
• Hold cover firmly while removing bolts.
• 4-10 Loosen bolts ½. Spring load is now
  released from the cover and retained by the check
  assembly.
• Verify spring load before removing all the
  bolts.

22
Check Valve Removal

• Center stem guided check assembly.
• 21/2-3 spring, stem, and disc holder are free
  once cover is removed.
• 4-10 disc spring subassembly.
• Slide subassembly straight out of seat and body.

23
Check Seat Removal

• Seats are o-ring sealed and bolted into the body.
• Remove bolts and pull seat straight out of body.
• Inspect the plastic guide bushing in center of
  seat.

24
Check Disc Replacement

• Un-thread nut on stem and remove disc retainer.
• For model (825) spring tension may have to
  be released to replace disc. Consult service
  center.

25
Check Valve Reassembly Notes

• Reassemble in reverse order.
• Apply lubricant to o-rings.
• 21/2-3 Models- inspect and clean the plastic
  guide in the check cover.

26
RV Cover Removal

• Remove external sensing line.
• RV cover is sealed by the diaphragm.
• No spring load on cover.
• Remove outer diaphragm.

27
RV Module Removal

• Module is o-ring sealed.
• Pull module straight out of body.
• Grasp the module (button) with one hand and
  insert fingers (other hand) into RV port and
  apply force to the seat disc.
• Do not twist module.

28
RV Seat Removal

• RV seat is mounted between the RV housing and the
  RV adapter.
• Remove the 4 bolts on the adapter and remove
  housing.
• Seat is o-ring sealed.
• Pull the seat straight out.

29
Disassemble RV Module

• Place the module on a flat surface with lower
  guide facing up.
• Hold the main stem with one hand and unscrew the
  lower guide.

30
Disassemble RV Module

• With lower guide removed, place the module upside
  down on a clean surface.
• Remove center of protective sticker (Save).
• Hold the button firmly and loosen screw.
• Button is spring loaded.

31
Disassemble RV Module

• Remove main stem and unthread the retainer.
• Remove slip ring and inner diaphragm.

32
Inner Diaphragm Replacement

• Position the bead of the inner diaphragm into the
  groove of the upper guide.
• Place slip ring over the diaphragm.
• Thread retainer ring onto upper guide (hand
  tight).

33
Main Stem Replacement

• Push the inner diaphragm back through the upper
  guide assembly.
• Insert main stem inside diaphragm.
• The screw hole on diaphragm and main stem should
  be lined up.

34
Spring / Button Replacement

• Place the spring over the upper guide assembly.
• Place button on spring and hold down firmly.
• Replace button screw.
• Reposition center label piece.

35
RV Disc Replacement

• Replace the RV disc in main stem.
• Replace the disc washer and lower stem guide.
• Replace and lubricate o-ring on main guide

36
RV Reassembly Notes

• Reassemble RV in reverse order.
• Push the RV module straight into body.
• Do not twist.
• Replace outer diaphragm with fabric side against
  button.
• Work the rolled edge into the space between the
  module and body.

37
830, 831 4-6
38
Modification Overview

• Production began in 2000.
• 4-6 sizes only.
• Production stopped in 2006.

39
Single Access Cover Removal

• Cover is o-ring sealed.
• Cover has no spring load.

40
Check Valve Removal

• Check valve modules.
• Modules sealed by o-ring and secured by a
  retainer.
• Slide retainer and flow insert straight out of
  body.

41
Check Valve Removal

• Remove the first check by sliding the module down
  stream.
• Remove the second check by using a screwdriver
  flat to free the module from the body.

42
Disassemble Check Valve

• Hold the module firmly with the disc retainer
  cone facing up.
• Using a large flat head screwdriver, unscrew the
  retainer counter clockwise.

43
Disassemble Check Valve

• Turn the module over.
• Module is spring loaded Hold firmly.
• Use an 1/8 allen wrench to remove the socket
  head cap screws.

44
Check Seat Inspection

• The check seat is free once the module is
  disassembled.

45
Check Disc Replacement

• The disc holder and disc are free once the module
  is disassembled.

46
Check Valve Reassembly Notes

• Reassemble in reverse order.
• Apply lubricant to seat o-ring.

47
850, 860, 880½-2
48
Check Cover Removal

• Check cover is bolted and o-ring sealed.
• There is no spring load on the cover.

49
Check Valve Removal

• Check valve modules.
• Modules are o-ring sealed and secured by a
  retainer.
• Check 1 must be removed before 2.
• Slide retainer straight out of body.
• The checks can now be removed by hand or with a
  screw driver flat.

50
Disassemble Check Module

• Module is spring loaded.
• Firmly grasp the seat section in one hand and the
  guide section in the other hand.
• Rotate counter clockwise until the two parts
  disengage. (approx.1/8 turn)

51
Check Seat Removal

• Check seats are part of each check module.
• If the seat is damaged, then the entire module
  must be replaced.

52
Check Disc Replacement

• Remove retaining screw and disc retainer.

53
Check Valve Reassembly Notes

• Reassemble in reverse order.
• Lubricate o-rings.
• When replacing check retainer, be sure that the
  flanged end of the retainer is touching the back
  side of the 1 check assembly.
• Replace cover with 3 test cock on the upstream
  side.

54
RV Cover Removal

• Cover is sealed by the diaphragm.
• Loosen brass cylinder in center of RV cover. (1/4
  turn) counter clockwise.
• There is a slight spring load on the cover.
• Hold cover while removing the cover bolts.

55
RV Module Removal

• The RV module will be attached to the cover.

56
RV Seat Removal

• The RV seat is sealed by a gasket.
• Simply slide the seat out of body.

57
Disassemble RV Module

• Remove the brass cylinder from the cover.
• Grasp the outer diaphragm and pull away from
  cover until the small diaphragm comes out through
  the hole in the cover completely.
• Remove the two slip rings from cover.

58
Disassemble RV Module

• Unscrew the module by holding the stem retainer
  with a wrench and the disc guide with the other
  hand.

59
RV Rubber Replacement

• The diaphragm and seat disc are free once the
  stem is disassembled.
• Reassemble rubber in reverse order.

60
RV Seat Replacement

• Apply lubricant to both sides of the seat gasket.
  This will help hold it in place.
• Insert the short end of the seat ring in the vent
  opening.
• The lubricant will help hold the seat in
  place.

61
RV Module Reassembly

• Apply lubricant to both sides of one slip ring
  and insert it in the top of the RV cover.
• Form the small diaphragm into a tulip shape.

62
RV Module Reassembly

• Insert the small diaphragm end of the module
  through the hole in the cover.
• Form the small diaphragm so that it lays flat in
  the top of the cover.

63
RV Module Reassembly

• Apply lubricant to both sides of the second slip
  ring and insert on top of small diaphragm.
• Thread the brass cylinder into the RV cover.
  (hand tight)

64
RV Module Reassembly

• Form the large diaphragm so that the bead is
  properly seated in the bore of the RV cover.

65
RV Module Reassembly

• Position the spring over the guide on the RV
  module.
• Check to make sure the sensing line o-ring is in
  place.

66
RV Reassembly Notes

• Once cover is bolted and secure, tighten the
  brass cylinder.

67
850, 856, 870V, 876V860, 880V21/2-10
68
Check Cover Removal

• Cover is bolted and o-ring sealed.
• There is a slight spring load on cover.

69
Disassemble Spring Module

• The spring module is held in position by the
  cover.
• Spring module is captured.
• Remove the retaining clip and hinge pin from the
  arm assembly.

70
Check Disc Replacement

• The check disc is a vulcanized clapper plate.
• Remove jam nut and washer from the back of the
  disc plate.
• When jam nut is tight, check disc is
  designed to wobble.

71
Check Seat Removal

• The seat and arm must be removed as one piece.
• The seat and arm assembly is bolted through the
  body and sealed by a gasket.

72
Check Seat Removal

• Locate and remove the four lock nuts on the
  outside of the body.
• Pull the seat and arm assembly straight out of
  the body.

73
Disassemble Seat Assembly

• Remove retaining clip and hinge pin from arm
  assembly.
• Inspect bushings and hinge pins for wear.

74
Check Valve Reassembly Notes

• Reassemble in reverse order.
• The seat assembly, disc plate, and spring module
  can be assembled together and placed into the
  body as one component.
• The seat ring will only fit into body one way,
  check the alignment of gasket and studs.

75
Check Valve Reassembly Notes

• The spring module is positioned by the cover.
• Make sure the pivot bearing is resting in the
  pivot socket on the cover.

76
RV Cover Removal

• Remove external sensing line.
• RV cover is sealed by the diaphragm.
• No spring load on cover.
• Remove outer diaphragm.

77
RV Module Removal

• Module is o-ring sealed.
• Pull module straight out of body.
• Grasp the module (button) with one hand and
  insert fingers (other hand) into RV port and
  apply force to the seat disc.
• Do not twist module.

78
RV Seat Removal

• RV seat is mounted between the RV housing and the
  RV adapter.
• Remove the 4 bolts on the adapter and remove
  housing.
• Seat is o-ring sealed.
• Pull the seat straight out.

79
Disassemble RV Module

• Place the module on a flat surface with lower
  guide facing up.
• Hold the main stem with one hand and unscrew the
  lower guide.

80
Disassemble RV Module

• With lower guide removed, place the module upside
  down on a clean surface.
• Remove center of protective sticker (Save).
• Hold the button firmly and loosen screw.
• Button is spring loaded.

81
Disassemble RV Module

• Remove main stem and unthread the retainer.
• Remove slip ring and inner diaphragm.

82
Inner Diaphragm Replacement

• Position the bead of the inner diaphragm into the
  groove of the upper guide.
• Place slip ring over the diaphragm.
• Thread retainer ring onto upper guide (hand
  tight).

83
Main Stem Replacement

• Push the inner diaphragm back through the upper
  guide assembly.
• Insert main stem inside diaphragm.
• The screw hole on diaphragm and main stem should
  be lined up.

84
Spring / Button Replacement

• Position flow washer on diaphragm with the cross
  channels facing up.
• Place the spring over the upper guide.
• Place button on spring and hold down firmly.
• Replace flow screw.
• Reposition center label piece.

85
RV Disc Replacement

• Replace the RV disc in main stem.
• Replace the lower stem guide.
• Replace and lubricate o-ring on main guide

86
RV Reassembly Notes

• Reassemble RV in reverse order.
• Push the RV module straight into body.
• Do not twist.
• Replace outer diaphragm with fabric side against
  button.
• Work the rolled edge into the space between the
  module and body.