Stryker Medical Renaissance Series, Руководство по обслуживанию

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Service Information
7
HYDRAULIC DESCENT RATE ADJUSTMENT
The descent rate of either end of the bed can be adjusted by turning the needle valves on the manifold assem-
blies located on the base of the bed (see illustration page 11). To access the manifold assemblies, lift and
support the foot end of the hood assembly (see page 15). The needle valve for the head end jack is located
on the left side of the bed if you are standing at the foot (control) end of the bed. The needle valve for the
foot end jack is located on the right side of the bed if you are standing at the foot end. To slow the jack descent
rate, turn the needle valve clockwise. To increase the jack descent rate, turn the needle valve counterclock-
wise.
NOTE
The descent rate was preset at the factory.
BLEEDING AIR FROM THE HYDRAULIC SYSTEM
If the lift motion is jerky or sluggish when the ”BED UP” button is pressed or when the lift pedal is pumped,
and/or the litter is not firm when it is pushed down, there may be air in the hydraulic system. This may have
been caused when the bed was unloaded from the shipping carton if it was lifted out by the litter instead of
by the brake rings.
To bleed air from the hydraulic system, plug the bed into a properly grounded wall receptacle and turn on the
main power switch at the foot end of the bed. Press and Hold the ”BED UP” button on the foot end keypad.
Raise the litter to full up and continue to hold the button to run the pump for an additional 30–45 seconds after
full up is reached. Press the ”BED DOWN” button and lower the litter to full down. Repeat the procedure
2–3 times or until the bed motion is smooth.
Raise the litter to full up using the lift pedal and continue to pump 10–12 times after full up is reached. Lower
the bed using the foot pedals. While continuing to hold the foot pedals down, pump the lift pedal an additional
10–12 times. Repeat the procedure 2–3 times or until the bed motion is smooth and the pedal action is firm.
CHECKING HYDRAULIC OIL LEVEL
1. Lift and support the base hood (see page 15). The hydraulic oil reservoir is located at the foot end of the
bed on the patient’s left.
2. With all cylinders full up, assure the hydraulic oil is at the required level as indicated on the reservoir.
3. If replacement oil is required, use Mobil Aero HFA or Mobil Aerex 903 hydraulic oil (Stryker part number
2020–70–475).
4. Replace the base hood (see page 15).