Alamo BUSH HOG RMB 1660 Operator's Manual page 167

19. TROUBLESHOOTNG
Problem
Boom Breaks Back
Too Easily
Boom Drops When
Two Functions
Actuated
Boom Moves on Its
Own (Under Power w/
no function actuated)
Electronic Joystick
Models
Boom Moves on Its
Own (Under Power w/
No function actuated)
Mechanical Joysticks
With Cables
RMB 1660 01/22
© 2022 Alamo Group Inc.
OPERATION
Possible Cause
Work Port Relief Malfunction
or Failure
Swing Cylinder Failure
Cutting head "Plowing" in
Ground
Operator Travelling Too Fast
Low Oil Level on Boom
Function System
Failed One way Flow
Restrictor in valve
Defective or damaged
Controller
Incorrect Hose Size to
Cylinder(s)
Defective or Damaged
Joystick Controller
Solenoid Valves stuck due
to contamination
Failed O-Ring on Solenoid
Valves
Improper Wiring
Defective or Damaged
Control Module(s)
Defective or Damaged
Joystick
Connection at valve
Damaged or failed
Solenoid Valves stuck due
to contamination
Operation Section 4-45
Remedy
Test to confirm, Adjust or Replace as needed
Test to Confirm, Rebuild or replace as needed
Operator Error, Operator Training
Operator Error, Operator Training
Fill oil and bleed system of air
(Gravity Aided Functions Only) Confirm and
replace
Repair or Replace as needed
Replace with proper OEM part
Repair or Replace as required.
Repair or replace as required. Flush and fill
Hydraulic System
Replace the O-Ring with proper
replacement parts
Confirm and Repair
Replace the module(s)
Repair or replace as required
Repair or replace as required
Repair or replace as required. Flush
and fill Hydraulic System