Atlas Copco RT Manuel de l'utilisateur - Page 6

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3:7

OPERATING THE TORQUE MACHINE

IMPORTANT: The reading of full preset pressure after the cylinder is extended DOES NOT INDICATE that

this pressure (torque) is applied to the bolt. It only indicates that the cylinder is fully extended and cannot turn

the socket or the ratchet link further until the tool automatically resets itself.

Releasing the remote control button will retract the cylinder. The tool will automatically reset itself and the

operator will hear an audible "click" indicating he can again push the remote control button and the socket will

turn. Each time the cylinder is extended and retracted, it is called a cycle. Successive cycles are made until

the tool "stalls" at the pre-set Torque/PSI with an accuracy of +/-3%. Repeatability is +/- 1%.

IMPORTANT: ALWAYS ATTEMPT ONE FINAL CYCLE TO ENSURE THE "STALL" POINT HAS BEEN

REACHED.

Should the tool "lock-on" after the final cycle, push down on the remote control button once more (to build

pressure) and, while maintaining this pressure, pull back on the external disengagement lever (RT) or reaction

Pawl (RTX). Releasing the remote control while continuing to hold back on the pawl lever/reaction pawl will

allow the tool to be removed easily.

Use of the automatic system is only recommended after Point 3.6, 3.7 and 3.8 have been respected.

With an Automatic Pump, cycle the tool one more time without automatic to check the final torque.

3:8

LOOSENING PROCEDURES

First, set the pump to 9,000 PSI (Do not try directly at 10.000 PSI). Change the drive and the reaction arm to

the loosening mode (Left = Loose), assuring the reaction arm abuts squarely off a solid reaction point. Press

and hold the remote control button down. Pressure will decrease as the socket begins to turn. As the cylinder

extends fully, you will hear an audible "click". Release the remote control button, and the cylinder automatically

retracts, at this time you will again hear the audible "click". Repeat this process until the fastener can be

removed by hand.

NOTE: IF THE BOLT DOES NOT LOOSEN WITH THE ABOVE PROCEDURE, IT IS AN INDICATION THAT

YOU NEED A LARGER TOOL TO LOOSEN THE BOLT.

By pushing down on the remote control button in the

advance position, the rear of the tool will be pushed back until

its reaction arm will contact its reaction point.

Continue to hold down the button as the socket or ratchet link

turns until you hear an audible "click" which will signify the hydraulic

cylinder inside the tool is fully extended and will not turn the advance

further.

Continuing to hold down the remote control button will result in a rapid

build up of pressure to the point of where the gauge reads what was preset

prior to applying the wrench.