172-65134A-03 (NF6) 16 Dec 2019
5
Maintenance
Take measures to prevent people from coming into direct contact with
product outlets. Failure to do so may result in burns or other injury from
the discharge of fluids.
CAUTION
Be sure to use only the recommended components when repairing the
product, and NEVER attempt to modify the product in any way. Failure to
observe these precautions may result in damage to the product or burns
or other injury due to malfunction or the discharge of fluids.
CAUTION
Operational Check
A visual inspection should be done on a daily basis to determine whether the
product is operating properly or is leaking.
Parts Inspection
When parts have been removed, or during periodic inspections, use the following
table to inspect the parts and replace any that are found to be defective.
Procedure
Valve Disc & Valve Seat: Check for oil film, warping, scratches or other wear
Screen:
Check for clogging or corrosion
Disassembly/Reassembly
When disassembling or removing the product, wait until the internal
pressure equals atmospheric pressure and the surface of the product
has cooled to room temperature. Disassembling or removing the
product when it is hot or under pressure may lead to discharge of fluids,
causing burns, other injuries or damage.
CAUTION
Be sure to use only the recommended components when repairing the
product, and NEVER attempt to modify the product in any way. Failure to
observe these precautions may result in damage to the product or burns
or other injury due to malfunction or the discharge of fluids.
CAUTION
Use the following procedures to remove components. Use the same procedures in
reverse to reassemble. (Installation, inspection, maintenance, repairs, disassembly,
adjustment and valve opening/closing should be carried out only by trained
maintenance personnel.)
Removing/Reattaching the Outer Cover
Part
During Disassembly
During Reassembly
Valve Seat Hold the body with one wrench and
remove the valve seat with another
Consult the table of tightening torques and
tighten to the proper torque
Coil Spring Remove
Reinsert
Valve Disc Remove being careful not to
scratch the seating surface
Insert with the proper orientation
(refer to Configuration and Exploded View)
Valve Disc
Guide
Remove
Insert with the proper orientation
(refer to Configuration and Exploded View)
Screen
Remove without bending
Reinsert without bending
