Alamo MACHETE Product Service Manual page 153

POSSIBLE FAILURE / CAUSE & SOLUTION
Cylinder Moves Intermittent:
CAUSE:
Obvious Causes Check First? (Check These First)
SOLUTION:
Perform all Operational checks, Tank Oil Level , Pump Operation, Control Valve
Circuit (Electrical Supply & Hyd Supply), All Circuits affected or only some Circuits.
If All Circuits will not work the Problem is most likely up-stream of the control Valve
or an electrical Problem (Models with Joystick Controller). The Following Causes
are based on Only some circuits being affected, Not all Circuits.
CAUSE:
Load Sense Signal Not Reaching The Tractor Pump Control?
SOLUTION:
Remove, Inspect and clean Signal Lines from Control Valve to Priority Valve.
Check all orfices to make sure they are clear. Note: it is not unusual for the debris
to drain out of system with the Oil when the pressure is released or the lines are
removed. Everything can appear clear then be pushed back in when pressure is
applied or it may never return, this can be a difficult malfunction to find as well as
correct. This means even though it was checked once it does not mean the problem
is not there.
CAUSE:
Low Oil Level In Tractor ?
SOLUTION:
Fill to Proper Level with recommended Oil. See Specification Chart for
recommended Oil type.
CAUSE:
No Voltage to Joystick Controller?
SOLUTION:
Check for Voltage to Controller. repair or replace as required, Wiring, Fuses,
Switches, etc.
CAUSE:
Faulty Joystick Controller ?
SOLUTION:
Check for Voltage output from Controller. With power to Controller and Joystick
function actuated, Check for Voltage at Harness end of Solenoid Valve Connector
for that function that is actuated. If there is no Output Voltage from Controller, check
Controller End of Harness, If still no Voltage Repair or Replace Controller as
needed. If Voltage at Controller then check Harness and Repair or Replace as
needed. (see pages 56 and 57 trouble Shooting / Testing)
CAUSE:
Faulty Tractor Hydraulic System ?
SOLUTION:
Perform Hydraulic ? Electrical isolation Test. If Tractor System is at Fault, Trouble
Shoot and Repair Tractor per Tractor Manufactures Guidelines.
CAUSE:
No or Low Pilot Pressure?
SOLUTION:
Check Pilot Pressure. Test, Adjust or Replace Pilot Pressure Valve as required
Machete (Service Manual) 04/04
© 2004 Alamo Group Inc.
(All Functions)
153