LAWSON ENGINEERS LTD Ref : PJ1682
Issue Date : 06.06.2006
To release the R.O.V., hoist the R.O.V. fully into the snubber. Pull the latch release
toggle switch then lower the R.O.V. until the umbilical termination is clear of the
docking box. The latch release toggle switch can now be returned to neutral.
SNUBBER ROTATE
The snubber can rotate
through 200º.
There are no end of travel limit switches; the
rotating frame comes up against a steel stop and the pressure will relieve over the relief
valve. This does not harm the snubber or the hydraulics in any way. Maximum speed
for this is set by a flow control valve (108) which is part of the 5 stack valve under the
skid deck.
SNUBBER UP / DOWN
Do not operate with the snubber in the lower position unless the vehicle is latched in and
the umbilical is slack. Only use this function with the A-Frame inboard. Only use this
function with the snubber in damped mode.
Ensure umbilical is slack when lowering.
6.6 TROLLEY
EXTEND
The skid base can be extended out to a distance of 2.6 m by operating the appropriate
toggle switch which controls valve 88. The extended platform section is to provide extra
space for maintenance if the TMS is to be split from the ROV.
In the extended position the trolley is capable of supporting the full SWL (ROV + TMS +
Work Package). We recommend however that the trolley is not loaded thus Offshore.
The trolley is capable of supporting the TMS offshore.
6.7 HPU CONTROLS and SYSTEM MONITORING.
Start /stop controls
A duplicate set, as fitted to the Winch Start/stop
panel.
Motor Overloads
High current / heat in the electric motors shuts the
motor down.
Low Oil Level
A lack of hydraulic oil in the Reservoir shuts the HPU
down.
High Oil Temp
A hydraulic oil temp in excess of 70 degrees C shuts
the HPU down.
High Gearbox Oil Temp
A gearbox lubricating oil temp in excess of 90
degrees C shuts the HPU down.
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