80-0420-23 POWER TONG
Manual № TM12012
Section 3
Page 3.13
©2008-2017 McCoy Global
Installation & Commissioning
3.3.2 Main Hydraulic Connections (Continued):
Perform hydraulic connection when the power unit is not running, or when the hydraulic pump is disengaged.
Wing-type connections are self-sealing, and must always be made up to the connection line on the male
connector to prevent partial closure of the integral check valve.
Self-sealing wing-type hydraulic disconnects should always be fully made up to the “fully engaged” indicator line
on the male side of the connection. Inspect all hydraulic connections before energizing hydraulic power to ensure
secure connections have been made. Supply of full hydraulic pressure without ensuring an established return line
may result in system damage.
Inspect these connections upon activation of the power unit. Leaking components must be repaired before
releasing the tong to the operational environment. Deactivate the power unit and de-pressurize the hydraulic
system according to the procedure on Page 5.5. Disconnect the main hydraulic connections and inspect all four
connectors (two male, two female) for damage or debris. If the connectors cannot be cleaned or easily repaired,
McCoy recommends replacement of the leaking connector. Note that damage to one of the connectors may have
caused damage to its mate.
Turn off power unit and depressurize hydraulic system before disconnecting the main hydraulic lines under normal
working conditions. See Page 5.5 for hydraulic system depressurization. McCoy recommends placing protective
caps over the exposed connectors to protect them from water and impact damage.
Illustration 3.3.2: Hydraulic Connections 02
!
WARNING
A CLEARLY IDENTIFIED REMOTE POWER PACK EMERGENCY STOP MUST BE INSTALLED IN THE
IMMEDIATE VICINITY OF THE TONG OPERATOR.
!
WARNING
ALWAYS TURN OFF HYDRAULIC POWER AND DEPRESSURIZE HYDRAULIC SYSTEM BEFORE
DISCONNECTING MAIN HYDRAULIC LINES.
Fully make up connection to
marked point on male fitting
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