User Manual
Document no. / rev.: ROX000337352_AE
Hydraulic Retrieval Tool
18
28. The pressure inside the retrieval tool must be released (contact control room and inhibit gas
detectors in the area). Use the bleed-off valve on the retrieval tool. Have a bucket ready to catch the
liquid that will come out. Put absorbent pads down as added protection against spillage. A hose can
be connected to the bleed off valve if needed to direct the flow. The bleed-off valve should be open
as long as there is liquid or gas coming out from the retrieval tool. This is to get as much liquid as
possible out of the retriever tool before it is disconnected from the service valve.
With the pressure in the retrieval tool reduced to 0, it must be checked that the service valve is
sealing properly. This is done by closing the bleed-off valve and leaving it closed for 1-2 minutes.
Then open it again, to see if there has been any pressure build-up inside the retrieval tool. If the
service valve leaks, then check if it is properly closed. Also check that the by-pass valve is closed. If
leaks in the valve cannot be stopped, the device must be reinstalled, and the valve must be
serviced. If a double service valve is being used close the upper service valve ball.
Figure 5: Steps 25 – 28
29. If the service valve is sealing properly, the retriever can be removed from the service valve. Loosen
the hammer nut, and unscrew it from the valve. This should be able to be done without any
resistance between the valve and tool. Then lift the retrieval tool away from the service valve. Be
aware of liquid that might flow out as the retriever is disconnected from the service valve. If the
access fitting is in the 6 o’clock position, the retriever might be filled with liquid, and therefore, after
being disconnected it must be held in the same position until it can be emptied into a bucket.
Figure 6: Steps 29 & 30
30. Place the retrieval tool with the hammer nut end up, and set the pump to “install”. Pump the
plug/probe assembly out of the retrieval tool. The probe/probe assembly can now be inspected,
It is imperative to make sure that it is only the retrieval tool that is loosened from the
service valve, and that the service valve is still kept properly tightened onto the access
fitting.
Furthermore one must be careful when loosening hammer nut on retriever. The tool is no
longer attached to the plug and will fall down or tip over if not handled properly.
