Specifications

I & M BULLETIN
CMCCU-004
BASIC CONTROLLER
Page 11 of 11
probe end to make certain it is not
damaged.
 Replace speed pickup with a new
one.
Clutch will not engage
After pushing and holding the
“Engage/Disengage Button” (start button)
for 3 seconds, the clutch will not engage. If
the clutch will not engage, check the
following items:
 Check that the voltage stamped on
the side of the coil (either 12 or 24
volts) matches that of the
equipments voltage supply. The
stampings on the side of the coil
MUST match the equipments
voltage source.
 The Power LED and the Engine
LED must be illuminated. If not, the
clutch will not engage. Refer to
those sections of the
Troubleshooting section of this
manual.
 The controller must be receiving a
minimum
of 8 volts DC from the
positive terminal of the battery to pin
1 on the back of the controller.
While cranking the engine, if the
machine battery is not fully charged,
the voltage may drop below 8 volts
and cause the controller to behave
erratically.
OIL PRESSURE
Check the following items:
 Check all hoses for leaks.
 Check reservoir fluid level.
 Check oil filter.
 Check cooler for a leak.
 Check pressure switch wires for a
cut wire.
 Install a pressure gauge with an
SAE #4 o-ring fitting into the
manifold at the location stamped
“G”. On the pressure switch in the
manifold, locate the pressure setting
stamped on the pressure switch.
With the engine running, and the
clutch either engaged or
disengaged, the dial on the pressure
gauge should read approximately
15psi higher than the pressure
switch setting. If this condition is
true then there is either a pressure
switch problem or a wiring problem.
 With the pressure gauge connected
and the engine running, check for
continuity across the two pressure
switch leads. If the pressure gauge
indicates that the pressure is good
but there is no continuity across the
pressure switch leads, then the
pressure switch may be bad.
SAFETY SWITCH
Check the following items:
 Trace the wire from pin 9 at the
back of the controller to the safety
switch on the equipment. If no
safety switch is present, then the
wire connected to the controller at
pin 9 must be receiving system
power when the controller is
powered on.