Troubleshooting 183
Tailgate Unlocking Spontaneously
If the tailgate seems to unlock by itself when using the packer, the “power bleed” inside the valve
might not be working on the right side of the hydraulic cylinder.
To fix this problem:
1. Apply all safety measures to ensure safety around the vehicle at all times.
2. Ensure that the parking brake is applied.
3. Pull out the red emergency STOP button.
4. Install a pressure gauge on each port of the tailgate section (on the valve).
Figure 8-10
Gauges 1 and 2
5. Start the engine and engage the hydraulic pump.
6. Disconnect the packer extend proximity switch.
This will prevent the packer from returning to its initial position.
7. Push the green “start cycle” button to start the packer and pressurize the system.
Gauge 1 should always indicate 0 psi and gauge 2 should indicate a sudden burst of pressure
(from 0 psi to 3000 psi) each time the packer reaches the end of a stroke. If gauge 1 indicates
pressure, this may be caused by a faulty holding valve, faulty velocity fuse or hydraulic hoses not
properly connected. Refer to the main hydraulic schematic for proper connection (see Main
Hydraulic Schematic (1) on page 185 or Main Hydraulic Schematic (2) on page 186).
Tailgate Lowering Spontaneously
If the tailgate seems to lower by itself, a faulty velocity fuse might be involved.
To fix the problem:
1. Apply all safety measures to ensure safety around the vehicle at all times.
2. Ensure that the parking brake is applied.
3. Make sure that the velocity fuse is clean and that its plunger is moving freely. Replace if necessary.
Fittings
Gauge 1
Gauge 2
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