2-22. WHEEL SLIPPING
If slipping occurs, reduce throttle
first. Never apply sand while the
wheels are slipping, as this could
cause a broken traction motor
a. If WHEEL SLIP indicating light (1)
flashes, one or more pairs of wheels are
slipping. Reduce throttle (2) until light
extinguishes. Apply sand with sand lever
(3) and slowly open the throttle.
b. Under extreme rail conditions (excessive
grades, rain, ice, or snow) repeated
slipping may occur. In these instances,
reduce throttle (2) to apply maximum
power without causing wheel slippage.
2-23. LOAD LIMITS
a. Keep the locomotive within proper load limits. The load meters are divided into green and
orange segments. The locomotive may be operated continuously with the needles indicating
in the green segment. If the needles indicate in the orange (overload) segment, the
locomotive must not be operated for more than the number of minutes indicated by the
position of the load meter needles.
b. When the time limit for that overload range is reached, the generator and motors are at their
maximum allowable temperature; to avoid severe damage from overheating, allow excess heat
to dissipate by one of the following methods:
With load cut off and engine idling, allow a cooling period of 15 to 30 minutes, after
which operation in any one of the overload ranges is again permitted with cooling period
Reduce load to continuous range on the dial and continue operation in this range.