172-65254MA-04 (A-COS-10) 22 Apr 2020
18
Reassembly
Assemble the unit using the same procedure as used for disassebling it; but in
reverse order. Observe the following precautions:
1. The PTFE gaskets may be re-used if free from fault, crushing or deformation.
2. Apply anti-seize to the threaded portion of screws and bolts, the spring housing,
ball and adjustment screw. Apply a small amount of anti-seize to the threads of
the valve seat, pilot valve seat and screen holder. Apply anti-seize carefully to
ensure it does not come into contact with other parts.
3. Fasten the bolts one at a time in an alternating
diagonal pattern to provide uniform seating.
4. After assembly, make sure that the piston and the
pilot guide operate smoothly without binding.
1) Fit the piston ring to the outside of the tension
ring.
2) The ring gaps should be opposite each other.
5. Standard fastening torque and the width across
flats for the tools to be used are as follows:
Part
A-COS
Connection Size
Width Across Flats
Tightening Torque
mm
(in)
mm
(in)
N
m
(lbf·ft)
Spring Housing Bolt
All
17
(
21
/
32
)
40
(29)
Pilot Valve Seat
All
19
(
3
/
4
)
70
(51)
Screen Holder
All
24
(
15
/
16
)
40
(29)
Pilot Body Bolt
15
– 40
(
1
/
2
– 1
1
/
2
)
17
(
21
/
32
)
60
(44)
50
(2)
19
(
3
/
4
)
70
(51)
Trap Cover Bolt
15
– 40
(
1
/
2
– 1
1
/
2
)
17
(
21
/
32
)
60
(44)
50
(2)
19
(
3
/
4
)
70
(51)
Valve Seat
15, 20
(
1
/
2,
3
/
4
)
36
(1
7
/
16
)
100
(73)
25
(1)
41
(1
5
/
8
)
125
(92)
32, 40
(1
1
/
4
, 1
1
/
2
)
60
(2
3
/
8
)
250
(185)
50
(2)
70
(2
3
/
4
)
300
(220)
Float Cover Bolt
15, 20
(
1
/
2,
3
/
4
)
8
(
5
/
16
)
7
(5)
25
– 40
(1
– 1
1
/
2
)
10
(
3
/
8
)
10
(7)
50
(2)
13
(
1
/
2
)
20
(15)
Trap Valve Seat
15, 20
(
1
/
2,
3
/
4
)
11
(
7
/
16
)
10
(7)
25
– 40
(1
– 1
1
/
2
)
13
(
1
/
2
)
15
(11)
50
(2)
17
(
21
/
32
)
40
(29)
(1 N
m
10 kg
cm)
NOTE: -If a torque greater than that recommended is applied, the body
or its
components may be damaged.
-Coat all threaded portions with anti-seize.
-If drawings or any other special documentation were supplied for the product,
any torque given there takes precedence over the values shown here.
Piston Ring
Tension Ring
Ring Gaps
Assembling the Piston Ring
