Steris Amsco 3085 SP, Руководство по обслуживанию

Страница: 107 / 228

7-2
764332-898
system cleanliness, using common sense and good
practices, and being dedicated to contamination
control should lead to success.
To prevent contamination from entering the hydraulic
system, all possible care must be taken during field
hydraulic servicing. The system is designed to
maintain oil and component cleanliness during normal
operation. When any hydraulic line or component is
opened, the system is vulnerable to the entrance of
contaminants (i.e., solid particles). Average particle
sizes in the oil are normally about 25 microns, or
0.001 inches. Some components may fail in a
hazardous way if subjected to particles greater than
100 microns, or 0.004 inches.
7.2.2 Work Place
The Operating Room would be the ideal place to
perform hydraulic service, but a maintenance area or
some other “back room” is the more probable location.
Avoid, at all costs, working in or next to a room where
any woodworking is carried out. Almost as bad is an
area where metal work, especially grinding, is done.
The airborne particles generated by these or other
similar operations are devastating and uncontrollable.
If you have no choice, at least ensure no such activities
have been performed there for several hours and none
will occur during servicing.
Try to work in a place with no nearby doors through
which people will be continually passing. The less
people-traffic around you, the better. Stay away from
heating and cooling vents that also put particulates
into the air.
7.2.3 Tools
Tools, gauges, hydraulic plugs, caps, etc., must be
extremely clean during servicing. Clean tools with a
clean, lint-free cloth if possible. Hands and fingernails
must also be clean when handling hydraulics. Scrub
fingernails with a brush.
Always place tools and parts on a clean surface as work
is being done. And, of course, no smoking, eating or
drinking when working with hydraulics.
7.2.4 General Procedures
Wipe all components to be serviced, and areas adjacent
to them, with a clean, lint-free cloth.
•
Breaking connections -
If connection is to remain
broken for any length of time, both ends of
connection must be plugged or capped with clean
parts. If this is impractical, at least cover open port
with a clean, lint-free cloth. A rubber band can be
used to hold cloth in place.
• Removing components - When a component is
removed, place it on and cover it with a clean, lint-
free towel.
• Handling parts - Try to handle all hydraulic
components by touching only those surfaces which
do not interact with hydraulic system oil.
• Assembling - Examine all surfaces coming into
contact with hydraulic system oil (wetted surfaces).
Any visible particles (i.e., 0.002 inch or more in
diameter) must be removed. Also examine O-rings
and O-ring seats for scratches and/or tears, as well
as contamination.
Be careful any critical surfaces do not unnecessarily
touch anything during assembly.
Ensure all fittings, valves, etc., are torqued per
specifications.
• Completing work - Clean external surfaces of work
area as before. Any leaks will be more easily
detected if all areas are clean before checking.
When the work is complete, verify the table functions
normally ... not only the function that was repaired,
but all functions.
7.3 IPX4 PROCEDURES
NOTE: Units with Serial Numbers B420702-025 and
higher have the Level Protection Against Fluid Intrusion
(IPX4) changes.
Adherence to IPX4 standards introduced the following
changes to the 3085 SP surgical table:
NOTE: The most noticable changes are the replacement of
the plastic cap shroud assembly (with a sealed flexible
bellows), the repositioning of the override switches and the
relocation of the hand control, foot control and Hermes
interface cable (if applicable). The flexible bellows, override
switches and connection receptacle plates are sealed with
black RTV to prevent fluid intrusion.
1. Back and seat cylinder hydraulic hoses run inside
bellows and exit through a sealed clamp on right
side of new bracket mounted to saddle. Hoses run
vertically between back and seat sections. Black
RTV is used to seal around hoses and wires where
they go through this clamp. If either hose or wiring
needs replaced, remove clamp and split adhered
area apart. When reassembling, work new RTV into
crevices in this sealing area, align and reapply
clamp.
NOTE: STERIS suggests letting table sit (without
moving top sections) for at least four hours to permit
sealant to harden. Otherwise, hoses may slip from the
pulling forces as the top sections move. Full cure time is
24 hours.