Priming the pump pushes hydraulic fluid into the system. On rare occasions, there may not be enough hydraulic fluid in the system for the pump to produce force. Priming the pump usually resolves this issue.
Note: If your power unit does not have a relief valve, you cannot prime it.
To prime the pump:
- On the power unit, remove the relief valve, then place a rag over the cavity and hold it there.
- Press Up on the pendant control for a few seconds (until you feel pressure on the rag).
- Reinstall the relief valve.
The pump should now have enough hydraulic fluid to operate normally.