Cub Cadet SLT1500 Series - Manual (Page 87)

Series 1000 and 1500
83
39.28. As an example, if the tractor had a slow-turning
starter, the ground-side voltage drop measured
below 0.1 volts, and there was not a parasitic
load on the engine (e.g. PTO clutch that is not
fully disengaged), it would be logical for the tech-
nician to check voltage drop to the starter. See
Figure 39.28.
39.29. With the starter motor engaged, the voltage drop
reading here is nearly 0.6 volts, indicating a seri-
ous problem in the heavy-gauge circuit between
the starter and the battery.
39.30. Checking voltage-drop at various points along
the circuit can help pin-point the problem.
• Check voltage-drop at the output lug on the
starter solenoid:
If there is a significant difference, the problem
lies between the lug on the solenoid and the lug
on the starter.
If there is little change, the problem lies further
up-stream.
• Check voltage drop at the input lug on the sole-
noid:
If there is significant difference between the
reading here and the reading at the output lug
(greater than 0.10 volt), then the contacts inside
the solenoid may be burned.
If there is little change, the problem lies further
up-stream, between the battery and the sole-
noid.
• Results may be cross-checked by testing volt-
age drop across the two posts of the starter sole-
noid while cranking the starter motor.
39.31. This test may also be applied to the light gauge
circuits on the tractor.
Figure 39.28
39.32. Switches may be bench tested using an Ohm
meter. Generally speaking, safety switches will
have less than 0.2
Ω through the contacts.
39.33. On MTD switches:
• Normally Closed contacts are identified by the
letters “NC” stamped on the spades that connect
to those contacts.
• Paired spades (going to the same set of con-
tacts) are next to each-other flat-to-flat (not edge
to edge).
• It is good to test switch contacts in both modes:
open and closed, confirming that each set of
contacts is neither shorted nor faulted. See Fig-
ure 39.33.
Figure 39.33