Page 5 of 14
2391, S.5
September, 2004
Repair Track Maintenance
3.1.10
The cleaned service 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 service portion until it is ready to
be mounted to the pipe bracket on the car.
3.1.11
Remove the failed service portion and apply shipping cover (Figure 4) and tighten nuts.
3.1.12
Apply standard or alternate stem guard (Figure 5) to the removed service portion and hold in place with
cotter pin.
3.1.13
Remove service portion pipe bracket gasket and discard properly.
3.1.14
Remove the pipe bracket strainer using strainer nut wrench.
3.1.15
Install a NEW WABCO Freight Car Products pipe bracket strainer. 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 apply the holding nut and tighten it
firmly using the strainer nut wrench.
3.1.16
Install a NEW WABCO Freight Car Products service portion pipe bracket gasket.
3.1.17
Remove the shipping cover from the new or satisfactorily repaired and tested service portion and immediately
apply the portion to the pipe bracket. 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.
3.1.18
Tighten the holding nuts evenly and firmly in order to sufficiently prevent gasket leakage and yet not
excessively to cause distortion of covers and gaskets. (Wabtec recommended tightening sequence:
starting at 3 o’clock position on each valve portion and going in counter clockwise direction, torque all hex
nuts to 30 foot-pounds first. Then apply final torque of 70 foot-pounds in same direction and order.)
3.1.19
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.
3.1.20
Clean and blow out the dirt collector bowl. Apply a NEW WABCO Freight Car Products gasket, then
assemble, lubricating the bolt threads 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.
3.1.21
If car is equipped with a reservoir charging check valve mounted on AB Type Pipe Bracket, remove the cap
nut, spring and check valve. Examine the internal parts for excessive wear or damage and replace rubber
check valve with a NEW WABCO Freight Car Products supplied check valve. Worn parts are to be renewed.
Reassemble the check valve.
3.1.22
Check the brake cylinder, reservoir and pipe bracket for loose or missing supporting bolts and nuts and
replace or tighten as necessary.
3.1.23
If any pipe clamps are loose or missing, or if angle/end cocks are broken or improperly located, make
necessary repairs.
3.1.24
After the control valve 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 (AAR Standard S-486, latest revision).