5
Servicing First and Second Checks
1.
Remove the hatch cover bolts. NOTE: The 4000CIV is
designed so that when the bolts are backed off
1
/
2
" (15mm),
all the spring load is released from the cover and retained by
the check module.
CAUTION: Be sure to verify this before removing all the bolts.
2.
Lift the check valve module straight out taking care not to hit
and damage the seating.
3.
The seat ring may be removed and replaced by pulling out
the two wire retainers on sizes 4" – 10" (100-250mm) while
on sizes 2
1
/
2
" – 3" (65-80mm), one quarter turn twist
removes seat. 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.
5.
CAUTION:
The check valve spring is in compression. The
spring load is captured by the two spring retainers and the
stem. The spring retainers are not to be removed for servic-
ing. If there is a need to replace the spring, spring retainer or
stem, an assembled module must be obtained from the fac-
tory. These modules are not interchangeable, be sure to
replace the first check with a first check module and the
second check with a second check module.
6.
To replace the disc on sizes 2
1
/
2
" – 4" (65-100mm) simply
remove the retaining nut or for sizes 6" – 10" (150-250mm)
remove the allen head socket screws. Reverse this procedure
to install the new disc.
Repair Kits
When ordering, specify Ordering Code, Kit Number and Valve Size.
First
Check
Second
Check
Relief
Valve
First and second checks
are not interchangeable
Note:
No special tools required
to service 4000CIV
*Disc & Spring Assembly
Seat
Seat O-ring
Cover O-ring
*Disc & Spring Assembly
Retainer Wire
Seat O-ring
Cover O-ring
2
1
/
2
" – 3" (65-80mm)
4" – 10" (100-250mm)
Warning: Spring assembly
is factory assembled.
DO NOT DISASSEMBLE
Lower Stem
O-ring (6" only)
(150mm)
Disc
Seat
ORDERING CODE KIT NO.
SIZE
in.
mm
First Check Kits
7016206
ARK 4000CIV CK1
2
1
⁄
2
-3
65-80
7016207
ARK 4000CIV CK1
4
100
7016208
ARK 4000CIV CK1
6
150
7016209
ARK 4000CIV CK1
8
200
7016210
ARK 4000CIV CK1
10
250
Second Check Kits
7016211
ARK 4000CIV CK2
2
1
⁄
2
-3
65-80
7016212
ARK 4000CIV CK2
4
100
7016213
ARK 4000CIV CK2
6
150
7016214
ARK 4000CIV CK2
8
200
7016215
ARK 4000CIV CK2
10
250
Kit includes: Disc & Spring Assembly, Cover O-
ring and Lubricant
ORDERING CODE KIT NO.
SIZE
in.
mm
Seat Kits for Checks
7016226
ARK 4000CIV S
2
1
⁄
2
-3
65-80
7016227
ARK 4000CIV S
4
100
7016228
ARK 4000CIV S
6
150
7016229
ARK 4000CIV S
8
200
7016230
ARK 4000CIV S
10
250
Kit includes: Seat, Seat O-ring, Cover O-ring,
Retainer Wire and Lubricant
First Check Rubber Parts Kits
7016216
ARK 4000CIV RC1
2
1
⁄
2
-3
65-80
7016217
ARK 4000CIV RC1
4
100
7016218
ARK 4000CIV RC1
6
150
7016219
ARK 4000CIV RC1
8
200
7016220
ARK 4000CIV RC1
10
250
Kit includes: Lower Stem O-ring (6" only),
Check Disc, Cover O-ring and Lubricant
ORDERING CODE KIT NO.
SIZE
in.
mm
Second Check Rubber Parts Kits
7016221
ARK 4000CIV RC2
2
1
⁄
2
-3
65-80
7016222
ARK 4000CIV RC2
4
100
7016223
ARK 4000CIV RC2
6
150
7016224
ARK 4000CIV RC2
8
200
7016225
ARK 4000CIV RC2
10
250
Kit includes: Lower Stem O-ring (6" only),
Check Disc, Cover O-ring and Lubricant
Complete Rubber Parts
7016231
ARK 4000CIV RT
2
1
⁄
2
-3
65-80
7016232
ARK 4000CIV RT
4
100
7016233
ARK 4000CIV RT
6
150
7016234
ARK 4000CIV RT
8
200
7016235
ARK 4000CIV RT
10
250
Kit includes: RC1, RC2, RV
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