Alamo MACHETE Product Service Manual page 20

CONTROL VALVE - JOYSTICK
JOYSTICK TROUBLE SHOOTING:
The Joystick Wiring Harness has 2 wire connections to link Machete to Tractor Power Supply
(12 Volt DC). One red colored wire (for Positive Connection) and 1 Black colored wire (for Ground
Connection). These wires will provide power to start the Front Auxilary Pump that runs the Cutting
Head Motor Circuit and power to operate the 5 spool Valve Electrical Circuits. The Hydraulics to
operate 5 Spool valve is furnished from Tractor Hydraulic System through the Tractors Internal
Hydraulics.
The Joystick Wiring Harness also has 2 other wires that must connect to Tractor; these are
2 Brown colored wires. These wires connect in to form the Safety Link in the Tractor Start Circuit to
prevent the Tractor Engine from being started when the Machete Electrical Circuit is energized.
These wires (Brown Colored) connect the Starter relay Circuit of the Tractor to the Master "On" / "Off"
Switch (Rocker Switch on later models) on the Joystick Console of the Machete. Caution: These 2
wires (Brown Colored) are to be spliced into Tractor Starter Relay Wire (approximately 3 ") behind
Starter Switch (normally Key Switch). DO NOT splice wires (Brown Colored) any further from Starter
Switch than 3", if further than 3" it may cause electrical interference in other tractor electrical
operations when the Motor Circuit is engaged.
With the Switch (Keyed Switch) of tractor in the "On" position and the Rocker Master Switch
on Joystick Console in the "On" position a Green Light (on Master Switch) should be on. (Note: Early
models did not have a Lighted Master Switch only a Push / Pull Switch). This green light indicates
that electrical power is available to the five movement control circuits of the Valve, and to the start
system of front pump as well as start circuit of Motor. To Check this Current at Switch (Master or
Motor Stop Start Switch) it can be done with a test light or Voltmeter.
VALVE CONTROLS CONNECTION TROUBLE SHOOTING:
1. Proportional Controlled Functions, Only the Swing, Lift and Dipper Functions are
Proportional Controlled, Therefore only these three functions will show progressive readings.
The Tilt and Door Functions are "On" or "Off, when checking keep track of which connection
is being check, as it will make a difference in reading on voltmeter
2. All Connections are marked on plug where they plug onto Valve (See Figure 5)
3. Make sure Tractor Engine is off and cannot be started while you are working on it.
4. Relieve Any Hydraulic Pressure, Make sure any Hydraulic Pressure in any Lines or
Cylinders has been relieved and Mower / Boom are resting on the Ground completely. This
should be done by working the Manual Overrides on Valve to be sure pressures are relieved.
5. Turn on Ignition Switch of Tractor to the "On" position (But DO NOT Start Engine)
6. Switch on the Master Rocker Switch (Push / Pull on older models) to the "On" position.
7. Remove the "Din" connector from the control Valve Section being tested to check voltage.
8. The Spade type Pins will be on the Section of the Valve and the plug will have slots where it
plugs on, Each of these connectors have numbers at the slot to ID which connections (see
Figure 5) connect where, these plugs cannot be reversed, will only plug on one way.
9. Voltage from the No. 1 Slot, Positive (12 Volt DC), Voltage will depend on Battery condition,
it cannot exceed the amount of the voltage in the battery and should not be less than Battery
Voltage when Joystick Switch is activated, So always Know what voltage is in Battery. (See
Figure 5)
MACHETE (Service Manual) 04/04
© 2004 Alamo Group Inc. 20