Labrie EXPERT Maintenance Manual page 343

Problem
Pump is leaking oil
Packer is moving vertically
or sideways
Tailgate is unlocking or
lowering by itself
Packer does not complete a
full cycle
Packer does not start at all
when pressing the green
button
Possible causes
Faulty hydraulic line
Stuck hydraulic spool inside
valve
Faulty electric dump valve
Loose connections
Damaged pump shaft seal
Worn down packer wear pads
Worn down sliding shoes
Dirty or defective velocity fuse
Inverted hydraulic hoses on
main hydraulic valve
Full body
Garbage behind the packer
Packer proximity switch
adjustment, or presence of
debris
Defective air control systems
switch
PTO
Troubleshooting 335
Solution
Perform a circuit analysis using the
main hydraulic schematics (see
Hydraulic Schematics on page 305).
Make sure that no spool inside the
directional valve is stuck in a
position that could send the
hydraulic flow to the tank.
Replace the electric dump valve.
Tighten all connections to the
pump.
Have the pump repaired by an
authorized service center.
Inspect or replace wear pads as
indicated in Upper Wear Pads on
page 135 and Lower Wear Pad on
page 165.
Inspect or replace sliding shoes as
indicated in Sliding Shoes on
page 127.
Clean or replace the velocity fuse.
See Tailgate-Locking Mechanism on
page 340.
Test the power bleed on the tailgate
section of the valve. See Tailgate-
Locking Mechanism on page 340.
Empty the body as explained in the
™ Operator's Manual.
E
XPERT
Clean behind the packer (see
Cleaning the Hopper on page 30).
Clean the area around the proximity
switches (see Proximity and Limit
Switches on page 200).
See Pneumatic System on page 321.
Make sure that the switch is
PTO
turned on.