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Medha Servo Drives Pvt Ltd.
MAS 696 Operator’s Manual
2.
SAND LIGHT:
It indicates that a sanding request has been made to
the Locomotive Computer by means of a MANUAL SAND switch
actuation on this Locomotive or any Train lined to this Locomotive.
Other Sanding requests are made by the Automatic function (to help
wheel creep or wheel slip control) and the Emergency Air Brake
application on run.
3.
WHEEL SLIP LIGHT:
Four conditions cause the wheel slip light to
switch ON:
○
Locked wheel due to Mechanically Locked Pinion
○
Wheel Slipping momentarily due to Rail conditions being
exceptionally poor
○
Wheel Slip Light by Train lined from consist Locomotives
○
Wheel Over speed due to wheel diameter mismatch
LOCKED WHEEL CONDITION:
Locked wheel is dangerous and requires
immediate action by crew.
Locomotive computer immediately lights WHEEL SLIP indicator and drops
power when the Traction Computer detects Locked Wheel. After 10 seconds
delay (20 if Air Brakes are applied) Locomotive Computer sets fault, Sounds
alarm Bell, continues wheel slip light and displays following Message:
" # n LOCKED WHEEL - OR SPEED SENSOR FAULT-STOP TRAIN AND
VERIFY THAT AXLE ROTATES"
Fault Indications above continue until Driver uses Locomotive computer
Display Unit to reset fault.
Ÿ
Stop train and set throttle handle in IDLE.
Ÿ
Find the Locomotive with Locked wheel Indication.
Ÿ
Slowly run the Unit with indication duly observing for sliding wheels
and listening for unusual noises from Traction Motors and Gear
cases. Are there any wheel sliding and/or Traction Motors or Gear
cases making unusual noises?
Refer to, and follow Rail road rules and regulations concerning
Locked wheel faults.
N
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Locked Wheel on moving Locomotives are very dangerous.
If locked wheel is indicated, perform the following steps.
WA
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N
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