Taylor-Dunn SC 0-90, Operation, T Roubleshooting And Replacement Parts Manual

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Maintenance, Service, and Repair
Motor Service
Page 6
SERVICE LIMITS
Note: Special and expensive motor testing equipment is required in order to accurately measure motor armature
or field resistance. In most cases, this equipment is not required in order to determine if a motor is faulty.
The majority of motor failures are due to an open circuit in the field or armature windings. If the symptom
of the vehicle is “not running with NO motor current” then a simple continuity test of each winding is all
that is required to determine if the motor is at fault.
Motor Specification
Number
Undercut Depth
Commutator Di-
ameter (min)
Brush Length
(min)
Resistance
(Ohms@75º F)
mm inches mm inches mm inches
Arma-
ture
Field
70-054-40
(XP-1672 or DV1-4002)
0.635 0.025 69.85 2.75 15.87 0.625 .0116 1.20
70-054-41
(XP-1789 or DY2-4001)
0.635 0.025 69.85 2.75 15.87 0.625 0.011 0.43
70-057-40
(XP-1673 or DV1-4003)
0.635 0.025 69.85 2.75 15.87 0.625 0.008 0.58
70-052-40
(XP 1876 or DD3-4004)
0.635 0.025 69.85 2.75 15.87 0.625 0.011 0.73
70-072-41
(XP 1820A)
0.635 0.025 69.85 2.75 15.2 0.6 0.0052 0.79
70-061-40
(XP-1765A)
0.889 0.035 69.85 2.75 15.87 0.625 0.011 0.71