Operation & Maintenance Instruction
Page 22 of 24
August, 2003
4225-50, S.6
properly seated in the bead groove of the body (35). Use
finger pressure to seat the bead in the groove.
7.7.59 Install the spool valve spring (4) in the body (35) so
that it is seated on the diaphragm follower (6).
7.7.60 Install the emergency and auxiliary reservoir check
valve plungers (14) into the proper cavities of the body (35).
7.7.61 Install two NEW check valves (13) into the body (35)
on top of the two plungers (14), then install the two check
valve springs (12).
7.7.62 Install two NEW 1" O.D. ring gaskets (3) into their
grooves in the top cover (2).
7.7.63 Carefully place the top cover assembly (2, 3) onto
the body (35) being sure that the springs (4 and 12) are
properly positioned in the spring cavities of the cover. Secure
the top cover (2) to the body (35) by installing the five
3
/
8
" x
1
1
/
2
" hex head cap screws (1). Equally torque the screws
between 15 and 25 foot-pounds.
7.7.64 Install three cleaned wire mesh filter screens (57) in
place in the release valve portion body (48).
7.7.65 Install a NEW
7
/
8
" O.D. ring gasket (55) and five NEW
13
/
16
" O.D. ring gaskets (56) into their grooves on the mounting
face of the release valve portion (58).
7.7.66 Place the release valve portion (58) on the service
portion body (48) and secure it in place by installing three
3
/
8
" flanged hex nuts (53). Equally torque the nuts between
11 and 30 foot-pounds.
7.7.67 The release valve stem guard (25) is to be installed
after the service portion has been tested. Use a NEW
3
/
16
x
2 cotter pin (24) when installing the guard (25).
7.8
CLEANING & INSPECTING
7.8.1
NON-REUSABLE PARTS
IMPORTANT:
ALL gaskets, o-rings, self-locking or elastic
stop nuts, diaphragms and wear rings ARE TO BE
SCRAPPED AND REPLACED WITH NEW WABTEC
CORPORATION PARTS.
7.8.2
REUSABLE PARTS
7.8.2.1 Wash
ALL
reusable parts in the cleaning solvent
described in Section 6. Springs may be wire brushed to assist
in the removal of any dirt, rust or scale. Care must be taken
not to damage springs.
IMPORTANT:
Cleaning solvents are to be used in a
well ventilated area.
7.8.2.2 The operating portions must be completely
dismantled and all parts inspected and cleaned. Parts,
including the body interior, must be cleaned by an approved
method that will dissolve oil and grease without damage to
the parts. The body must not be submerged in a solution. A
wire brush may be used to assist in the removal of any light
surface dirt, rust or scale on cast parts. The exterior of the
body must be thoroughly cleaned.
7.8.2.3 All pistons, slide valves, graduating valves and
bushings must be thoroughly cleaned. To do this, the piston,
slide valve and graduating valve assembly must be
dismantled.
7.8.2.4 After the parts have been cleaned, they
MUST BE
completely dried. Use a low pressure jet of clean, dry air to
blow the parts dry.
8.0
TESTING AND ADDITIONAL INFORMATION
8.1
After the ABDX-SS Control Valve has been
assembled, but before it has been returned to service, it must
pass a series of tests following the procedures of the current
issue of Wabtec Corporation Test Specification T-664742A/B-O.
8.2
IMPORTANT:
The ABDX-SS portions are not to
be applied to cars exceeding 39 feet in length. Extreme
caution musty be taken to ensure the portions replace like
portions on the car. Failure to heed these instructions may
result in equipment damage and/or personal injury.
8.3
IMPORTANT:
When installing the Emergency,
Service or both Portions on the ABDX-SS Pipe Bracket
Portion,
NEW
gaskets and filters must be used, see
Section 7.2.
