# Connecting the System

The Atlas Copco hydraulic torque wrench and the power pack are connected by a 10,000 PSI (700 bar) operating pressure twinline hose assembly. The safety ratio of the Atlas Copco Hydraulic Hose is 4/1. On each twin hydraulic hose, one line must be MALE-MALE and the other line must be FEMALE-FEMALE in order to assure a correct interaction between Pump and Machine. Connect the twinline hose to the swivel as shown:

Hydraulic connections

Check all coupler connections because, after the system has been pressurized, you will not be able to tighten the couplers by hand and using tools will damage the couplers.

Avoid gap between hoses and couplers. Red ring appears if gap exits.

Ensure connectors are fully engaged and screwed snugly together.

Never use two twin hydraulic hoses between Pump and Machine. If so, you have the high pressure on the retract side and your machine is no able to work properly. To avoid tool malfunction, do not reverse connectors. Do not try to loosen the swivel assembly at any moment.

WARNING

Electric motors may spark. Do not operate in an explosive atmosphere of in the presence of conductive liquids. Air driven pumps are better suited for these applications.