Page 11 of 14
2391, S.5
September, 2004
Repair Track Maintenance
4.0
PROCEDURE FOR CLEANING WABCO FREIGHT CAR PRODUCTS “ABDX” TYPE BRAKES
THAT HAVE BEEN SUBMERGED
4.1
Remove all associated piping from the pipe bracket, auxiliary air device pipe brackets, reservoirs, brake cylinders
and retaining valve. Remove the pipe brackets and reservoirs from the car.
4.2
Remove and clean the emergency and auxiliary reservoir pipe strainers.
4.3
Appropriate equipment must be available to properly and satisfactorily clean the various pipe brackets associated
with a set of air brake equipment. Since the condition of the pipe brackets is critical to proper valve operation,
WABCO Freight Car Products recommends that all pipe brackets that have been submerged in water or other
contaminants be returned to one of WABCO Freight Car Products’ repair centers for restoration to satisfactory
operating condition. Attempts to restore such pipe brackets by others is done so at their own risk.
4.4
Clean all reservoirs and volumes by washing out with high pressure water using a suitable nozzle and drain until
completely dry.
4.5
Thoroughly clean the inside of all pipes by whatever means necessary (hammering, high pressure water, air, etc.).
4.6
Apply new or satisfactorily cleaned and repaired pipe brackets and thoroughly cleaned and dried reservoirs to
the car, replace the auxiliary and emergency reservoir pipe strainers with new parts. Apply NEW WABCO
Freight Car Products gaskets to all flange fittings. After coating the cap screw threads with grease, reconnect
all pipes. All valves and valve portions reapplied to the car must be new or satisfactorily repaired and tested
parts. Brake cylinders must be cleaned in accordance with Wabtec Instruction Leaflet 2391, Sup.1.
4.7
After the necessary repairs have been completed, the entire air brake equipment must be tested in accordance
with the latest issue of Code of Air Brake System Tests for Freight Equipment (AAR Standard S-486, latest
revision).
5.0
RUBBER PARTS, SHELF LIFE AND STORAGE
5.1
New rubber parts such as gaskets, o-rings, rubber seated check valves, seals, diaphragms, etc., must not be
applied if over five years old from date of manufacture. The primary parts such as gaskets and diaphragms
contain date coding.
5.2
To determine shelf life, WABCO Freight Car Products new rubber repair kits are dated with the oldest date (half
year) of rubber components contained within the kit. Major individual WABCO Freight Car Products rubber
parts have the date molded into the rubber where practical.
5.3
The storage area for rubber parts must be cool, dark, and free from dampness and mildew. Since most rubber
goods are affected by ozone, they must not be stored near electrical equipment that may generate ozone.