Have you checked the Mob / Demobilisation valve?
it might have been only partially closed by mistake. (See Below for Lawson instructions)
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1. Position skid, A-frame and snubber assembly on deck.
2. Weld the two outboard sacrificial weld brackets, bolted to skid, to the
deck.
3. Position Power pack adjacent to skid.
4. Connect A-frame main cylinder hoses to "A-frame erection valve" on
power pack.
5. Connect power pack power supply.
6. Turn mobilisation key switch on HPU panel. This isolates the winch safety
circuit.
7. Check motor rotation is correct, only motor 1 will operate during
mobilisation.
8. Start Motor 1 on the power pack, wait for motor to switch to delta, approx.
5 seconds.
9. Switch valve (98), drawing Sw1618X-0003, located at the rear of the Skid
(see fig 1), to supply oil to L.H. cylinder only.
10. Remove bolts from sliding cylinder mount of the R.H. cylinder.( See fig
2).
11. Extend the L.H. cylinder until the R.H. cylinder mount has slid into its
intermediate position. CAUTION – it is not possible to slide the cylinders
along the skid with the tall weld down brackets (for the winch) in place.
The fittings to the cylinders foul.
12. Bolt R.H. cylinder mount in place.
13. Remove bolts from L.H. cylinder mount.
14. Retract the L.H. cylinder, which pulls the L.H. cylinder mount forward
into its intermediate position.
15. Bolt L.H. cylinder mount in place.
16. Extend the L.H. cylinder until the R.H. cylinder mount has slid into its
forward socket.
17. Bolt R.H. cylinder mount in place. (Torque = 800Nm)..
18. Remove bolts from L.H. cylinder mount.
19. Retract the L.H. cylinder, which pulls the L.H. cylinder mount forward
into its socket.
20. Bolt L.H. cylinder mount in place. (Torque = 800 Nm).
21. Switch valve (98), drawing SW1618X-0003, to centre position
22. Disconnect power pack to A-frame hoses.
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Dan
dan@workocean.com
Workocean Limited
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