brake component defects Flashcards
lock out magnet valve defective in the open position
your ok
closed your fycked
lock out magnet valve defective in the open position
your ok
closed your fucked, on the EP max 15 to the nearest siding
defective emergency application valve
turn the red EC to preserve BP by initiating the secondary emergency application valve
defective release prevention valve
this is defective if when you move the handle back towards a release position the tripple valve releases the brake and charges the BP (bad)
defective regulating valve
if the BP is low and it’s not depleting rapidly (which would suggest a rupture) it’s the regulating valve, if it’s between 425 and 550 it’s ok under 425 your disables
if you have a CE they can charge another BVICS close yours and 15km nearest siding emergency brakes only
brake controller moving involuntarily
to a more applied position- hold it in place
to a less applied position- unlikely to happen on the air so trip out the EP drive on the air
why can’t we go around with 2 BVICS open
because the second one will charge the BP so we can’t use air brake
why might the auto air brake release during application?
leaking brake cylinders
defective tripple valves
brake controller faults
oil/dirt/water in the braking system
signs it’s releasing:
sound of air in the charging valve
brake cylinder decreasing pressure
ineffective braking - bring the train to a stand and go back to EP fan the handle then trip it back out and make a full service application. then recharge BP
failure of charging valve
if the BVICS is open and the handle isn’t in emergency and it’s not charging:
(RTA SPB) check MR to brake controller
if it’s open close it
trip the EP out and fan the handle between released and emergency (reduces MR pressure and may free the valve) open the cock and see if it charges (check SPB)
if not:
leave BVIC open step 7 EP in
ensure park brakes are applied
open BVICS in another motor
charge BP and apply and isolate
if you can’t fix a charging valve in the lead
you need a CE to charge from another motor and max 15 nearest siding lead BVUCS closed EMY brake only
what is the function of the lockout magnet valve
to prevent an auto air application while your on the rheo
brake unit
MR to seven step
variable load valve
(restricted application valve m cars only)
restricted application limiting valve and ball check valve
dump valve
release ensuring valve
by pass check valve
BP to tripple valve
