Westco 16-25, Product Manual, Page: 12 / 49

Section 2 Page 2
Power
Before installing the tong for field operations, ensure that an appropriate power unit
is available and that the power unit is adjusted for use with the tong. To operate the
tong within its full capability, the relief valve on the hydraulic power unit should be adjusted
to 2,500 psi and the bypass valve to 900 to 1,000 psi. Refer to the power unit manual for
the procedure on power unit valve adjustments. Normal care should be exercised in
locating the power unit and connecting the tong. Excessive distance between tong and
power source will result in pressure losses.
Figure 2-2: Torque gauge Figure 2-3: Installation of Power Tong
Accessories
The accessories necessary for the type of operation to be performed must
be available.
Torque Gauge Assembly - Once installed, the torque gauge assembly becomes
an integral part of the unit. To install the torque gauge on the tong, proceed
as follows:
1. With mounting screws, mount torque gauge into position on torque
Gauge plate (Figure 2-2).
2. Route hose to avoid interference with tong operation.
3. Secure one side of load cell to backup line bracket on rear of tong.
Lift Cylinder - If the system is not counterbalanced, a lift cylinder should
be used. For lift cylinder operation, the tong must be equipped with an additional
valve section. The lift cylinder should be suspended from the line that will hang the
tong, as shown in Figure 2-3.
Spring Hanger - A typical spring hanger installation is shown in Figure 2-3.
For a counterbalanced support line, the spring mount is suspended from the line.
When a lift cylinder is used, the spring mount may be installed above or below
the lift cylinder as shown in Figure 2-3.
Section 2 Page 3