Farr HD8625 Technical Manual page 37

s & o
eTup peraTion
Making A Connection (Continued):
j) Push the motor control valve toward the tong to rotate the cage plate in the make-up direction.
k) Push the rotation control handle toward the centre of the tong up to the stop once the tong jaws cam on to the tubing This threads
the connection together at high speed. As the joint becomes fully made up the increasing torque demand will stall the motor, and
displayed torque will increase.
l) Stop rotation, and set motor to low speed and shift to low gear (low speed/high torque - See Section 2.G.2 for instructions for
setting motor to low speed, and Section 2.G.3 for shifting to low gear). This will enable the tong to produce adequate torque for
making up the joint to specification.
m) Push the rotation control handle all the way in to complete the connection at low speed/high torque. Observe the torque gauge
- stop rotation when the specified make-up torque is reached. Reverse the rotation control valve to release the tong jaws from
the tubing (see Illustration 2.H.6).
I 2.H.5: m
llustratIon otor
I 2.H.6: m
llustratIon otor
C - m -
ontrol ake uP
C - r j
ontrol eleasIng aws
hD8625 8- " 35K T
5
/
ong
8
T M
echnical anual 2.21