172-65260m-05 (S-COS/S-COSR Pressure Reducing Valve) 27 Oct 2008
20
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 guide, ball
and adjustment screw. Apply a small amount of anti-seize to the threads of the
main valve seat, pilot valve seat and pilot 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
Tightening
Torque
(N
⋅
m)
Distance Across
Flats
(mm)
Bolt for Spring Housing / Pilot Body
25 13
Pilot Valve Seat
50 17
Pilot Screen Holder
40 24
Nut & Bolt for Pilot Body / Main Body
30 13
Bolt for Main Body / Trap Body
(S-COS only)
30 13
Main Valve Seat
70 27
Trap Valve Seat
(S-COS only)
10 11
Bolt for Trap Cover / Trap Body
(S-COS only)
30 13
Cover Plug
(S-COSR only)
120 32
1 N
⋅
m
≈
10 kg
⋅
cm
Caution: If a torque greater than that recommended is applied, the pressure
reducing valve or its components may be damaged.
Note: If drawings or any other special documentation were supplied for the product,
any torque given there takes precedence over the values shown here
Tension Ring
Assembling the Piston Ring
Ring Gaps
Piston Ring