Operation & Maintenance Instruction
Page 10 of 24
August, 2003
4225-50, S.6
7.2.5.4
IMPORTANT:
The shipping cover must not be
removed from the clean replacement Service Portion until it
is ready to be mounted to the Pipe Bracket on the car.
7.2.5.5 Remove the failed Service Portion (3) and apply the
shipping cover and tighten nuts.
7.2.5.6 Apply standard or alternate stem guard (See Figure
16) to the removed Service Portion and hold in place with
cotter pin.
7.2.5.7 Remove Service Portion Mounting Gasket (4) and
discard properly.
7.2.5.8 Remove the strainer nut (5) using strainer nut wrench
then remove and discard the old air strainer (6).
7.2.5.9 Install a NEW air strainer (6). A wooden mandrel of
suitable form will assist in guiding the strainer into proper
position. Make certain its inner end is in engagement with
the sealing bead (if inserted properly, all nut threads will be
visible), then insert strainer nut (5) and tighten it firmly using
the strainer nut wrench.
7.2.5.10
Install a NEW Service Portion Mounting
Gasket (4).
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.
7.2.5.11
Remove the shipping cover from the new or
satisfactorily repaired and tested Service Portion (3) and
immediately apply the portion 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.
7.2.5.12
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 Mounting Gasket (4).
7.2.5.13
Remove release valve stem guard from the new
or repaired service portion and reconnect the release valve
handle or handles (which has been left attached to release
rod) to release valve handle end plate with a new cotter pin.
7.2.5.14
After the Service Portion 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.
7.3
"IN-SHOP" MAINTENANCE PROCEDURES
IMPORTANT:
The procedures which follow are to be
performed in the repair shop.
To obtain satisfactory operation
and reliability of this device only replacement parts supplied
by Wabtec Corporation are to be used in the maintenance of
this device.
IMPORTANT:
When performing the procedures which
follow,
DO NOT
use hard or sharp metal tools to remove
gaskets, o-rings, the dust boot, or diaphragm. Exercise care
so that no damage is done to parts.
WARNING:
When performing the procedures which
follow, springs within the assembly may be under load.
Exercise care so that no parts are inadvertently expelled.
Inadvertently expelled parts may cause bodily injury, and/or
damage to parts.
7.4
DISASSEMBLY of ABDX-SS EMERGENCY PORTION
See Figure 12
7.4.1
Remove the vent protector assembly from the
emergency portion body (58) if it is still in place. The vent
protector assembly is not illustrated in Figure 12.
7.4.2
Small Vent Valve Piston, Inshot Check Valve
7.4.3
Depress the spring retainer (28) into the body (58)
and tilt it so that it is free of the retaining lip in the body
(58) and remove the retainer (28), vent valve spring (29),
and the small vent valve (23) from the body (58).
7.4.4
Depress the spring retainer (25) into the body (58)
and tilt it so that it is free of the retaining lip in the body (58)
and remove the retainer (25), inshot check valve spring (26),
and the check valve (27) from the body (58). SCRAP the
check valve (27).
7.4.5
Emergency Diaphragm Piston, High Pressure Spool,
Emergency Accelerated Release Check Valve
