Taylor-Dunn MX-026-00 - Symptoms

Curtis PMC Troubleshooting
Page 2
SYMPTOMS:
If your vehicle exhibits any of the following symptoms then skip the main troubleshooting
sequence and proceed to Symptom Troubleshooting later in this section.
• Runsslowinbothdirectionsplushigharmatureandeldcurrentinbothdirections.NOTE:
Armatureandeldcurrentshouldbeequal.
• Runsslowinbothdirectionsplushigharmaturecurrentinbothdirections.NOTE:Field
current will be very low.
• Runs normal in one direction only plus runs slow or lacks power in the opposite direction
with high armature current in the opposite direction or;
• Accelerates slowly and exceeds normal speed in the opposite direction with high armature
currentonly.NOTE:Fieldcurrentwillbeverylowintheoppositedirection.
• Accelerates slowly and exceeds normal speed in both directions plus high armature current.
NOTE:Fieldcurrentwillbeverylow.
• Fullspeedonly.
• Doesnotrunineitherdirectionplusthereisnoisefrommotor(humorwhine)withhigh
eldcurrentandlowarmaturecurrent.
• Jumps into high speed when direction is selected after depressing the accelerator pedal.
Excessive spark when connecting battery
• Doesnotrunorrunsveryslowwithlowmotorcurrentandhighbatterycurrent.
• Jumps into high speed when direction is selected after depressing the accelerator pedal.
If your vehicle does not exhibits any of the above symptoms then continue with the main
troubleshooting sequence on the following pages.
Note: Vehicles with Dana H12 transmission,
Forward solenoid is in the center.