5
1.
Remove hatch cover bolts.
NOTE:
The 709 is designed so that,
when the bolts are backed off
1
⁄
2
", all the spring load is released
f r o m t h e c o v e r a n d r e t a i n e d b y t h e c h e c k m o d u l e .
CAUTION: Be sure to verify this before removing all the bolts.
2.
Lift check valve module straight out, taking care not to hit and
damage seat ring.
3.
The seat ring may be removed and replaced by pulling out the two
wire retainers. The wire retainers are 10" long. One is drawn out
clockwise and the other is drawn out counterclockwise.
4.
With the retainer wires removed, the seat ring can be lifted straight
up and removed.
CAUTION:
The check valve disc and spring assembly are in
compression. The spring load is captured by the two spring retainers
and the stem The spring retainers are
not
to be removed for servicing.
If there is a need to replace the spring, spring retainer or stem, replace
the disc and spring assembly. If the disc holder has been damaged
by freezing or severe water hammer, it can be replaced in the field.
Remove the disc holder retaining ring and slide the disc holder off the
stem. Remover the o-ring from the stem and replace with a new one.
Apply grease to the o-ring and slide the new disc holder into place. Re-
install the retaining ring.
NOTE:
The disc holder should not be removed
when servicing only the disc, remove allen head screws holding the
disc retaining plate and replace disc.
709 2
1
⁄
2
" – 10" (65-250mm)
EDP No.
Kit No.
Size
First or Second Check Kits
in
mm
0887900
RK 709 CK4
2
1
⁄
2
– 3
65-80
0887901
RK 709 CK4
4
100
0887902
RK 709 CK4
6
150
0887903
RK 709 CK4
8
200
0887904
RK 709 CK4
10
300
Kit includes: Disc & spring assembly and Cover O-ring.
Rubber Parts (for one check)
0887905
RK 709 RC4
2
1
⁄
2
– 3
65-80
0887906
RK 709 RC4
4
100
0887907
RK 709 RC4
6
150
0887908
RK 709 RC4
8
200
0887909
RK 709 RC4
10
250
Kit includes: Disc and Cover O-ring.
Complete Rubber Parts
0887915
RK 709 RT
2
1
⁄
2
– 3
65-80
0887916
RK 709 RT
4
100
0887917
RK 709 RT
6
150
0887918
RK 709 RT
8
200
0887919
RK 709 RT
10
250
Kit includes: Two discs and Two Cover O-rings.
Seat Kits
0887910
RK
709S
2
1
⁄
2
– 3
65-80
0887911
RK
709S
4 100
0887912
RK
709S
6 150
0887913
RK
709S
8 200
0887914
RK
709S
10 250
Kit includes: Seat, Seat o-ring, Retainer Wire and Cover O-ring.
Cover Kits
0887920
RK 709 C
2
1
⁄
2
– 3
65-80
0887921
RK 709 C
4
100
0887922
RK 709 C
6
150
0887923
RK 709 C
8
200
0887924
RK 709 C
10
250
Kit includes: Cover and Cover O-ring.
709DCDA 3" – 10" (80-250mm)
EDP No.
Kit. No.
Size
First Check Kits
in
mm
0887930
RK 709DCDA CK1
3
80
0887931
RK 709DCDA CK1
4
100
0887932
RK 709DCDA CK1
6
150
0887933
RK 709DCDA CK1
8
200
0887934
RK 709DCDA CK1
10
250
Second Check Kits
0887935
RK 709DCDA CK2
3
80
0887936
RK 709DCDA CK2
4
100
0887937
RK 709DCDA CK2
6
150
0887938
RK 709DCDA CK2
8
200
0887939
RK 709DCDA CK2
10
250
Kit includes: Disc assembly, Spring assembly and Cover O-ring.
Rubber Parts (for one check)
0887940
RK 709DCDA RC4
3
80
0887941
RK 709DCDA RC4
4
100
0887942
RK 709DCDA RC4
6
150
0887943
RK 709DCDA RC4
8
200
0887944
RK 709DCDA RC4
10
250
Kit includes: Disc and Cover O-ring.
Seat Kits
0887945
RK 709DCDA S
3
80
0887946
RK 709DCDA S
4
100
0887947
RK 709DCDA S
6
150
0887948
RK 709DCDA S
8
200
0887949
RK 709DCDA S
10
250
Kit includes: Seat, Retainer Wire and Cover O-ring.
Cover Kits
0887950
RK 709DCDA C
3
80
0887951
RK 709DCDA C
4
100
0887952
RK 709DCDA C
6
150
0887953
RK 709DCDA C
8
200
0887954
RK 709DCDA C
10
250
Kit includes: Cover and Cover O-ring.
Spring Retainer
(Do Not Remove)
Spring
O-ring
Spring Retainer
(Do Not Remove)
Disc
Disc Holder
Retaining Ring
Disc Retainer
Allen Head
Socket Screws
Stem
Disc Holder
*Warning: Spring assembly
is factory assembled. DO NOT
DISASSEMBLE.
2
1
⁄
2
", 3" (65-80mm)
4" - 10" (100-250mm)
Cover
Cover
O-ring
*Disc &
Spring
Assembly
Seat
Seat
O-ring
Retainer Wire
Seat
Second
Check
First
Check
Cover
O-ring
O-ring
Service, Replacement Parts and Maintenance 2
1
/
2
" – 10" (65-250mm)
RP-IS-709_709DCDA.indd 5
9/26/08 2:28:15 PM
