Operation & Maintenance Instruction
7.1.14 Remove and SCRAP the diaphragm (15) from the
piston (13).
7.1.15 Remove the
diaphragm follower
(16) from the piston
stem (17).
7.1.16
Remove and SCRAP
the vent protector
seal
(27) from
the
washer
(26) in the bottom of the housing (19). The seal
has an interference fit with the
washer
and can be
pulled
out.
7.1.17 WARNING: During the following procedure,
the spring (24) will be compressed. Exercise care
so
that no parts are inadvertently expelled from the
assembly. Inadvertently expelled parts may cause
bodily injury and/or damage to property.
Carefully
depress the washer (25) and spring (24) into the
housing (19), then, while holding these parts depressed,
remove the retaining ring (26) from its groove in the housing
(19).
Slowly release
the
hold
on the
washer
(25) and spring
(24) permitting the spring (24) to extend its full travel.
7.1.18
Remove the washer (25), spring (24)
and exhaust
valve
with seal (21) from the housing (19).
7.1.19
Remove and SCRAP
the
exhaust valve seal
(22) from
the
exhaust valve
(23).
7.2 Cleaning and Inspecting
7.2.1
NON-REUSABLE
PARTS
7.2.1.1 ALL gaskets, o-rings,
seals,
the wire mesh strainer
and diaphragms
ARE
TO BE
SCRAPPED
and
replaced
with
NEW Wabtec
Corporation
parts.
NOTE:
A
Kit of
Rubber Parts
for the
VX Vent Valve
Portion is
available and may be obtained by ordering Part Number
654716. See Parts
Catalog
3211-7, S.7 for parts
included
in
this Kit.
7.2.2
BODY AND
HOUSING
IMPORTANT: Cleaning solvents are to be used in a well
ventilated
area.
7.2.2.1 Using a
clean, lint-free
rag that has been saturated
with the cleaning solvent,
as
described
in
Section
6.1.1, clean
the interior and exterior
surfaces
of the
body
(2) and housing
(19).
7.2.2.2 After these parts are cleaned, they MUST BE
completely
dried. Use a low pressure jet of clean, dry air to
blow the parts dry.
7.2.2.3 Inspect the
body
(2) and housing (19) for damage.
Pay particular attention to the bushings within the housing.
The bushings should be free of nicks, scratches and pits.
Replace
the
body and/or housing
if found to be
damaged,
or
if they
show
signs of excessive wear, or if they are in such a
condition that may result in the unsatisfactory operation of
the VX Vent Valve Portion.
7.2.3
EXHAUST
VALVE
7.2.3.1
Dip the exhaust valve
(23) in a
bath
of
the
prescribed
cleaning solvent, Section 6.1.1 and promptly wipe it clean
with a clean, lint-free cloth.
7.2.3.2
Blow
the
exhaust
valve (23)
completely
dry, using a
low pressure jet of clean, dry air.
7.2.3.3 Inspect the exhaust valve (23). It is to be replaced
if it is found to be nicked, cut, cracked, broken, or damaged
in any
way,
or if it is in such a condition that
may
result in the
unsatisfactory operation
of the VX Vent Valve Portion.
7.2.4
REMAINING REUSABLE
PARTS
7.2.4.1 Wash
all remaining
reusable parts
using the
cleaning
solvent as described in Section 6.1.1.
7.2.4.2 The springs (8, 24) may be wire brushed to assist
in the removal of any dirt, rust or scale.
7.2.4.3 After the parts have been
cleaned, they
MUST BE
completely dried. Use a low pressure jet of clean, dry air
blow to the parts dry.
7.2.4.4 Inspect the piston (13). Replace the piston if it is
bent,
broken, damaged, excessively
worn, or if it is in such a
condition that may result in the unsatisfactory operation of
the VX Vent Valve Portion.
7.2.4.4.1 Remove the
1
/8" choke plug (14) from the piston
(13) and place it in a bath of the
cleaning
solvent to soak.
7.2.4.4.2 While the choke plug is soaking, inspect the
opening in the piston (13) from which the choke plug (14)
was removed to be sure that it is clean and free of dirt. If
necessary,
blow
the
opening clean
with a
low pressure
jet of
clean, dry air.
To Next Page
Loading...