Page 3 of 14
2391, S.5
September, 2004
Repair Track Maintenance
1.0
SCOPE
1.1
The purpose of this manual is to describe appropriate repair track procedures to be followed by maintainers of
these control valve portions and to avoid unnecessary expense due to careless handling.
IMPORTANT:
This procedure covers the replacement of the ABDX Type Control Valve Portions only. For
repair track information on AB Type Control Valves (AB, ABD, ABC-1, & ABDW), please see Instruction
Leaflet 2391, Sup. 1.
1.2
Rule 3 - Testing of Air Brake Equipment MUST BE in accordance with the current Field Manual of the AAR
Interchange Rules.
2.0
GENERAL REQUIREMENTS
2.1
Each repair track location must be provided with containers so arranged that both the lubricants and brushes
can be protected against dirt, one extra set of shipping covers for service and emergency portions, a release
stem guard for the service portion and a vent protector plug for the emergency portion, a blower hose and
suitable tools such as wrenches, scrapers, clamps, etc.
NOTE:
The air brake shop containers with known approved AAR lubricants must be appropriately
stenciled with AAR specification identification.
Lubricant
Current AAR Specification
Dry Graphite
M-913
Brake Cylinder Lubricant
M-914
2.2
The operating portions or parts thereof must never be dismantled or have any parts removed or replaced at the
car. All cleaning and re-lubricating of the valve portion parts must be done as per WABCO Freight Car Products
recommendation by an AAR Certified shop in accordance with AAR S-477.
The valve portions removed from the car must be transported to the shop for cleaning, lubricating and testing in
accordance with current issue of Instruction Leaflet 2391, Sup. 4 and other WABCO Freight Car Products
specifications.
2.3
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 (AAR Standard S-486, latest revision).
2.4
Inspect angle/end cocks for external damage, including worn, broken or missing handle stops/lugs. Handles
with excessive free movement due to pin wear and/or broken or worn top cover stop lugs exceeding
1
/
16
” on the
top or sides are cause for immediate angle cock removal. Wabtec recommends to replace with an AAR
approved new or satisfactorily repaired and tested cock at least once every 144 months or more frequently if
conditions cited above exist.
2.5
All rubber parts, including pipe bracket gaskets and the control valve pipe bracket strainer must be replaced
with NEW WABCO Freight Car Products parts at the time the portion is renewed and a suitable replacement
applied.
NOTE:
Control valve pipe bracket strainer must be replaced with NEW WABCO Freight Car Products parts at
any time it is exposed whether access is from the service portion or emergency portion side of the pipe
bracket.