27
Tightening and loosening a bolted flange connection
Warning:
•
Place the tool with the socket on the nut or the bolt. Make sure that the
socket is placed over the nut or the bolt as far as possible. Obey the safety
instructions for sockets.
• Place the reaction arm against a solid reaction point that can handle the
load. Obey the safety instructions for reaction arms.
•
Make sure that the hydraulic hoses are securely connected. Obey the safety
instructions for hydraulic hoses.
• Make sure that the hydraulic hoses are free of the reaction point and other
obstructions.
•
Pressurize the system momentarily. If the tool tends to creep or stand askew,
stop immediately, turn off the pump, and adjust the reaction arm to a more solid
and secure position.
Tightening a bolted flange connection
1. Start the pump unit and set the torque.
2.
Place the tool onto the nut or the bolt head
correctly. Refer to the marking “TIGHTEN” on
the tool.
3.
Press and hold the start button (B) on the remote
control until the square drive no longer turns. The
piston in the tool is in the fully extended position.
An audible click will sound. The pressure gauge
increases to the set value.
Note:
If the pressure gauge increases to the set value, this does not indicate that the
required torque is applied to the nut or the bolt. It only indicates that the piston
in the tool cannot turn the socket further until the tool automatically resets itself.
4. Release the start button (B) on the remote control. The piston in the tool moves to the fully retracted
position. An audible click will sound.
5. Repeat steps 3 and 4 until the nut or the bolt no longer turns. The nut or the bolt has been
tightened with a torque accuracy of ±3%.
Loosening a bolted flange connection
Caution:
• Always set the pressure as low as possible to loosen the nut or the bolt.
• If you must constantly use a high pressure to loosen the nut or the bolt, use
a larger tool. Contact your local HYTORC representative for more information.
7.6
7.6.1
7.6.2
Operation (Cont’d.)
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