Yale 524150797 Maintenance Manual page 61

0620 YRM 1513
PROBLEM
Traction motor does not operate.
POSSIBLE CAUSE
Battery lacks sufficient charge.
Throttle position sensor or neutral
switch broken or out of adjustment.
Stator coil shorted to case.
Stator wires broken-open circuit.
Electric brake assembly not releas-
ing/damaged.
Drive unit internal damage.
Troubleshooting
PROCEDURE OR ACTION
Charge/change battery.
Troubleshoot the throttle position
sensor or neutral switch.
Check resistance between winding
and case. Resistance should be at
50,000 ohms or above. Replace
stator or traction motor assembly if
necessary.
Check resistance between motor
terminals. Resistance should read
less than 1 ohm between each ter-
minal. Replace stator or traction
motor assembly if necessary.
Troubleshoot the electric brake as-
sembly.
Raise the drive tire and check that
the drive unit rotates smoothly.
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