Not all rams have bleed valve so you may have to crack the union on one line at the ram and have someone turn the wheel back and forth (full cycle) and fill the helm pump at the same time. The second person must remain at the ram and tighten the nut when air ceases to bubble out. Crack the other nut at the ram and repeat. This can take five minutes or 1hr. depending on length and angle of lines. You may have to go back to the first nut on the ram and repeat one time. I just installed a new hydraulic system by myself and it was a major bitch running back and forth from the helm to the ram.
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