Troubleshooting 157
Gauge #1 (on the velocity fuse side) 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 or velocity fuse
or by some hydraulic hoses not properly connected. Refer to “Main Hydraulic Schematic” on
page 124 for proper connection.
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. Ensure that the tailgate is closed.
4. Disengage the hydraulic pump and turn OFF the engine.
5. Remove the velocity fuse.
Tailgate must be closed before removing the velocity fuse.
6. Make sure that the velocity fuse is clean and that its plunger is moving freely. Replace if necessary.
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