Kelly W36, Operating Instructions Manual

Page: 30 / 46

30
Correct hydraulic chain tensioning
The chain tension is managed by combination of telescopic cylinders, a nitrogen
accumulator and a pressure control valve. Pressure is applied to the circuit by unfolding
the wing. When the appropriate working pressure is reached (69 bar/1000psi), isolate the
circuit by engaging the tension isolation valve.
A chain tension pressure of 69 Bar/ 1000psi is recommended for most situations. Refer to Fig 12.
It may however be necessary in different situations to increase the pressure (Max 138 Bar/ 2000psi).
Loosen the lock nut, open the tension isolation valve (Fig 14), activate the unfold circuit while using an
allen key to turn the screw in the direction (Fig 25) until the desired pressure is reached on the tension
pressure gauge.
To decrease the tension pressure wind the screw all the way out, activate the fold circuit to release the
tension pressure. Reactivate the unfold circuit while slowly winding the screw until the desired pressure
is reached. (Fig 26.)
When finished close the tension isolating valve (Fig 14) and tighten the lock nut.
Fig 25.