Alamo MACHETE Product Service Manual page 58

TROUBLE SHOOTING - TESTING
SOLENOID VALVE TEST:
1.
Using this test to determine if the Malfunction is in the Solenoid Valve Assembly
after having performed Isolation Test 1 and 2. This test is used when some
circuits are operating and one or more are not, The Circuit will work manually
as described in Isolation Test 2 but not electrically.
2.
Start with the Engine "OFF" and the Control Valve Cover still removed.
3.
Connect the Solenoid Valves of the inoperative Valve Section to the Harness
connections of a Valve section that is known to be operational (See Valve
Diagram), remember some are proportional and some are not. Connect (for
Testing) Swing, Lift and Dipper Functions (Proportional) or connect Door to Tilt
(Non-Proportional) for testing. In other words connect (Swap) the Harness
connection from Questionable Circuit with a good Circuit.
4.
Operate the Joy stick function for Both swap Circuits, (NOTE: You swapped
connections so the movement of Joystick one way will have a different Cylinder
movement now). KEEP this different movement in Mind.
5.
If the inoperative circuit begins to work now and the former function is inopera-
tive, The problem most likely is in the Joystick Wiring Harness.
6
. If the Inoperative Circuit STILL FAILS to operate, and the Known operative
circuit continues to function properly, The problem is most likely in the Solenoid
Valve (Providing that the Circuit functioned when Manually operated with Manual
Override).
NOTE: See Directions above, Disconnect connector
for malfunctioning circuit and recoonect to a known
operational circuit for testing.
Pressure Port
Inlet Section
5 Spool Valve
(Handles Shown
as Illistration Only)
FIGURE 21
Machete (Service Manual) 04/04
© 2004 Alamo Group Inc.
(See Figure 21)
P
T
A
B
B
A
B
A
B
A
B
58
Tank Port
Swing
Lift
Dipper
Tilt
Door
(Used 1998 & Up)