Cub Cadet Challenger 550, Service Manual

Page: 33 / 255

General Information
1‐25
Resistance
Resistance is the opposition to the flow of
electricity within a circuit or component and
is measured in ohms. Resistance causes a
reduction in available current and voltage.
Resistance is measured in an inactive
circuit with an ohmmeter. The ohmmeter
sends a small amount of current into the
circuit and measures how difficult it is to
push the current through the circuit. An
ohmmeter, although useful, is not always a
good indicator of a circuit’s actual ability
under operating conditions. This is
because of the low voltage (6-9 volts) the
meter uses to test the circuit. The voltage
in an ignition coil secondary winding can
be several thousand volts. Such high
voltage can cause the coil to malfunction,
even though it tests acceptable during a
resistance test. Resistance generally
Increases with temperature. Perform all
testing with the circuit or component at
room temperature. Resistance tests
performed at high temperatures may
indicate high resistance readings and
cause unnecessary replacement of a
component
Amperage
Amperage is the unit of measurement
for the amount of current within a circuit.
Current is the actual flow of electricity.
The higher the current, the more work
can be performed up to a given point. If
the current flow exceeds the circuit, it
will damage the system.
Basic Service Methods
Most of the procedures in this manual
are straightforward and can be
performed by anyone reasonably
competent with tools. However, consider
personal capabilities carefully before
attempting any operation involving major
disassembly.
1. Front, in this manual, refers to
the front of the UV, The front
of any component is the end
closest to the front the UV.
The left and right sides refer to
the position of the parts as
viewed by the rider sitting on
the seat facing forward
.
2. Whenever servicing an engine or
suspension component, secure
the UV in a safe manner.
3. Tag all similar parts for location
and mark all mating parts for
position. Record the number and
thickness of any shims when
removing them. Identify parts by
placing them in sealed and
labeled plastic sandwich bags.
4. Tag disconnected wires and
connectors with masking tape
and a marking pen. Do not rely
on memory alone.
5. Protect finished surfaces from
physical damage or corrosion.
Keep gasoline and other
chemicals off painted surfaces.
6. Use penetrating oil on frozen or
tight bolts. Avoid using heat