Alamo MACHETE Product Service Manual page 84

MOTOR - ELECTRICAL CONTROL
MOTOR CONTROL SWITCH
Earlier Model Machetes:
Switch)
The Cutting Head Hydraulic Motor circuit is engaged by two Manually operated Switches lo-
cated on the Joystick controller One is a Push Pull Switch the other is a Push Button Switch, Both
Switches must be actuated in sequence before the Motor Circuit will engage. (Figure 35)
Power is taken from the Ignition Switch through a fuse to the normally open contacts on a
"Push / Pull" Switch. When the Push / Pull Switch is pulled out, it completes a Circuit to the "Hold
Coil" of the Solenoid located on the Pump. The "Hold Coil" does not have enough pull by itself to
move the Control Lever on the Pump so a "Pull Coil" is employed. The "Pull Coil" takes power from
the "Hold Coil" Circuit downstream of the Push / Pull Switch and goes to a manually closed posi-
tion, A Spring Opened (Normally Open) Switch called a "Momentary Switch". When this Switch is
Pushed after the Push / Pull Switch is Pulled, The Pull Coil is energized which moves the control
Lever on the Pump. After the Pump has been engaged the Hold Coil will keep the Control Lever in
the engaged position.
Adjustment of the Solenoid Linkage is Critical to prevent premature burnout of the Sole-
noid. With the Solenoid engaged, adjust the Linkage so that the Valve lever is fully actuated.
Later Model Machetes:
The Cutting Head Hydraulic Motor circuit is engaged by actuating a single On - Off Switch
located on the Joystick controller. The System works in much the same way as the earlier system
except that later machines utilize a Solenoid Valve with a single Coil instead of the earlier arrange-
ment, No Momentary Switch is required.
The "Push / Pull" Switch also acts as a Neutral Start Switch for the motor Circuit, The starting
Circuit of the Tractor is wired through the Switch so that the Starter Circuit is open when the Motor
Circuit is Closed preventing the Operator from starting Tractor while the Motors engaged.
Current Model Machetes:
Switch)
The Cutting Head Hydraulic Motor circuit is engaged by actuating a Push / Pull Switch with a
built in Momentary Switch, The Momentary Switch is actuated by pulling up on Pull Knob after
Push / Pull Switch has been turned on, This is a Spring loaded start and will pull it self back in
when released.
ID Early Model from Late Model:
1. Look at Type Switches mounted in Joystick Console, 2 Push / Pull Switches is Early (Old)
Model and 1 Push Pull Switch with 1 Lighted Rocker Switch is Later (New) Model.
2. The Pump Solenoid Connection changed from 3 Wire Connection to 2 Wire, (See Figure 35)
Below for Plug Design at Pump Solenoid). The early Model Did Not use Plug.
Later Model Pump Solenoid 3 Wire Plug
Machete (Service Manual) 04/04
© 2004 Alamo Group Inc.
(See Wiring Schematic in This section)
FIGURE 36 (w/1 Push Pull Switch &1 Momentary Push Button
FIGURE 37 (w/ 2 Push Pull Switches)
FIGURE 36 (w/ 1 Push Pull Switch & 1 Lighted Rocker
FIGURE 35
Corrent Model Pump Solenoid 2 Wire Plug
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