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OPERATION
1900 07/11 Operation Section 4-44
© 2011 Alamo Group Inc.
OPERATION
21. TROUBLESHOOTING GUIDE
Problem Possible Cause Remedy
Boom Breaks Back
Too Easily
Work Port Relief Malfunction
or Failure
Test to confirm, Adjust or Replace as needed
Swing Cylinder Failure Test to Confirm, Rebuild or replace as needed
Cutting head "Plowing" in
Ground
Operator Error, Operator Training
Operator Travelling Too Fast Operator Error, Operator Training
Boom Drops When
Two Functions
Actuated
Low Oil Level on Boom
Function System
Fill oil and bleed s ystem of air
Failed One way Flow
Restrictor in valve
(Gravity Aided Functions Only) Confirm and
replace
Defective or damaged
Controller
Repair or Replace as needed
Incorrect Hose Size to
C
y
linder
(
s
)
Replace with proper OEM part
Boom Moves on Its
Own (Under Power w/
no function actuated
)
Defective or Damaged
Joystick Controller
Repair or Replace as required.
Electronic Joystick
Models
Improper adjustment of
Joystick potentiometer gear
timin
g
Adjust to locate proper neutral setting per the
Service Manual
Solenoid Valves stuck due
to contamination
Repair or replace as required. Flush and fill
Hydraulic System
Failed O-ring on Solenoid
Valves
Replace the O-ring with proper replacement
parts
C.A.N. System Improperly
Adjusted
Consult a Factory Trained Service Technician
to facilitate the proper adjustment of the system
Valve Main Spool Bent or
Stuck
Replace the Valve Section
Improper Wiring Confirm and Repair
Defective or Damaged
Control Module(s)
Replace the module(s)
Boom Moves on Its
Own (Under Power w/
no function actuated
)
Defective or Damaged
Joystick
Repair or replace as required
Mechanical Joysticks
with Cables
Cables Sticking
Bent too sharply Install new cable and route to provide adequate
bend radius
Overheated due to contact
with hydraulic components
Replace Cables and insulate from Hydraulic
Components
Connection at valve
dama
g
ed or failed
Repair or replace as required
Main Spool in Valve Stuck or
bent
Repair or replace as required