LUCAS® Chest Compression System – Service Manual
3323809-001, © 2017 Physio-Control, Inc.
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10.2. Mechanics Test
With the device turned off perform the following tests:
Piston Check
Pull the Suction Cup down and up to check that the Decompression Spring moves smoothly
and without any unusual noise.
Pull the Suction Cup down and continue to slowly pull down until the Carry Ball Nut has
reached its lower position, check that it runs smoothly and without unusual noise.
Attention: If you push to fast you will feel resistance in steps because the Electrical Motor is affected,
instead push slowly in one long stroke.
Push the Suction Cup back up to its top position, check that it runs smoothly and without
unusual noise.
Claw Lock
Mechanism
Check
Check for play between the Release Ring and the Support Legs:
Pull the Release Ring gently to unlock the mechanism and open the Claws.
Move your finger around in the Release Ring; verify that you can detect some play between
the Ring and the Support Leg. You should be able to hear a rattle from the play in the Ring
when moving the Release Ring from side to side. If the Support Ring is tight against the
Support Leg with no play, then the check has failed.
Figure 10.2-1: Release Ring Check