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2391, S.5
September, 2004
Repair Track Maintenance
2.6
When the valve portions are removed, if conditions are found in the portions or the pipe brackets evidencing
that the car brake equipment has been submerged in water, special additional cleaning operations not regularly
performed will be required as per instructions outlined in Section 4.
IMPORTANT:
The ABDX Type Control Valve Portions and associated air brake equipment details, including
brake pipe angle cocks, are to be removed from the equipment arrangement and taken to a repair facility for
complete overhaul. Wabtec recommends that the portions and other details must be completely disassembled
and the parts must be cleaned or renewed, lubricated, assembled and tested for correct operation at least once
every 144 months, or more frequently if service conditions so indicate.
3.0
PROCEDURES FOR CLEANING ABDX, ABDXL, ABDX-R, & ABDXL-R CONTROL VALVES ON
REPAIR TRACKS
3.1
SERVICE PORTION
If the valve requiring attention is an ABDX or ABDX-R service portion (Figure 1 and 3), the following steps should
be taken:
3.1.1
Close the branch pipe cut-out cock and drain the air out of auxiliary reservoir, emergency reservoir and
brake cylinder by pulling the release valve handle on the service portion.
3.1.2
Remove gaskets in both brake pipe end hose couplings and replace with NEW WABCO Freight Car
Products coupling gaskets. Follow Rule 5 - in the current Field Manual of the AAR Interchange Rules as
to hose renewal.
3.1.3
Blow any dirt or water out of the air supply line and couple air supply to approved Single Car Test Device.
3.1.4
Couple Single Car Test Device to one end of the car, preferably the “B” end.
3.1.5
With both angle cocks open, blow out the brake pipe by moving the test device handle to Position 1. Close
the angle/end cock to apply a dummy coupling. Once the dummy coupling is applied leave both angle/end
cocks open.
3.1.6
Remove the bowl from the dirt collector and leave it off until a cleaned service portion is applied.
NOTE:
Inspect the dirt collector check valve. If made from aluminum, it must be removed, scrapped and
replaced with a NEW WABCO Freight Car Products replacement part.
WARNING: When blowing out the brake pipe, and/or the opening and closing of air valves,
make sure all personnel are clear of the ends of the vehicle as well as under the vehicle to protect
against injury from flying debris as well as potential movement of brake rigging, cylinders, etc.
3.1.7
Carefully open the branch pipe cut-out cock for a few seconds to expel dirt from the branch pipe, then close.
3.1.8
Disconnect the release valve handle or handles, leaving it attached to the release rod or rods.
3.1.9
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 valve portion. Using the blower hose, blow off the service portion, pipe
bracket, 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.