Operation & Maintenance Instruction
August, 2003
Page 9 of 24
4225-50, S.6
7.2.4
Emergency Portion Removal and Installation
See Figure 5
7.2.4.1 Scrape, wipe and blow off with a jet of low
pressure air (less than 30 psi) all dirt adjacent to the gasket
between the pipe bracket and emergency valve portion. Using
the blower hose, blow off the emergency portion, pipe bracket
hopper slopes, car under frames, etc., to free them of all
loose dirt that may otherwise get into the emergency portion
or pipe bracket when the portion is being removed and
reapplied.
7.2.4.2 Remove the vent protector from the failed emergency
portion and apply a WABCO Freight Car Products standard
vent protector plug, as shown in Figure 17.
7.2.4.3 The cleaned emergency portion must be handled
with care to avoid entrance of dirt or water which could
damage the internal parts.
IMPORTANT:
The shipping cover must not be removed
from the clean replacement emergency portion until it is ready
to be mounted to the pipe bracket on the car.
7.2.4.4 Remove the Emergency Portion (1) from the Pipe
Bracket Portion (7) by first removing the three
5
/
8
hex nuts
(8) and apply a shipping cover, as shown in Figure 15, and
tighten nuts.
7.2.4.5 Remove and
SCRAP
the Emergency Portion
Mounting Gasket (2) from the mounting face of the Pipe
Bracket (7).
7.2.4.6 Visually inspect the Pipe Bracket Portion (7) for
damage. This portion need not be removed from the
equipment arrangement unless it is damaged. If it is
necessary to remove the Pipe Bracket Portion (7), car builder
and owner-operating property instructions are to be followed.
7.2.4.7 Inspect the Emergency Portion mounting face of the
Pipe Bracket Portion (7) to be sure that it is clean and is not
damaged or scratched. Be sure that
ALL
parts are clean
and unrestricted. If necessary, the ports can be blown out
with a low pressure jet of clean dry air. Exercise care so that
no dirt is blown into the ports or passages of the Pipe Bracket
Portion (7).
7.2.4.8 Apply a NEW WABCO Freight Car Products
Emergency Portion Mounting Gasket (2) to the Pipe
Bracket (7).
7.2.4.9 Remove the Vent Protector Plug from the new or
satisfactorily repaired and tested Emergency Portion (1).
Install a cleaned or renewed Vent Protector into the new
Emergency Portion (1).
WARNING:
The ABDX-SS portions must not be applied
to cars exceeding 39 feet in length. Such incorrect application
may result in undesired brake action that could cause
equipment damage and injury to bystanders.
7.2.4.10
Remove the shipping cover from the new or
satisfactorily repaired and tested Emergency Portion (1) and
immediately apply the Emergency Portion (1) to the Pipe
Bracket (7). Coat the threads of the mounting studs lightly
with brake cylinder lubricant (M-914) or a compound
consisting of one part graphite, Wabtec Specification [M-
07695-02] (AAR Specification M-913), and two parts oil (SAE-
20) by weight.
7.2.4.11
Tighten the three
5
/
8
hex nuts (8) evenly and firmly
in order to sufficiently prevent gasket leakage and yet not
excessively to cause distortion of the mounting gasket (2).
7.2.4.12
After the Emergency Portion (1) has been
reinstalled and all repairs have been completed, the entire
air brake equipment must be tested in accordance with the
latest issue of the Code of Air Brake System Tests for Freight
Equipment T-664742A/B-O.
7.2.5
Service Portion Removal and Installation
See Figure 5
7.2.5.1 Disconnect the release valve handle or handles,
leaving it attached to the release rod or rods.
7.2.5.2 Scrape, wipe and blow off with a jet of low
pressure air (less than 30 psi) all dirt adjacent to the gasket
between the Pipe Bracket (7) and Service Portion (3). Using
the blower hose, blow off the Service Portion (3), Pipe Bracket
(7), hopper slopes, car underframe, etc., to free them of all
loose dirt that may otherwise get into the Service Portion or
Pipe Bracket when the portion is being removed and
reapplied.
7.2.5.3 The cleaned Service Portion (3) must be handled
with care to avoid entrance of dirt or water which could damage
the internal parts.
