Service Information
21
JACK DESCENT RATE ADJUSTMENT
Required Tools:
Screwdriver Bungee Cords
Adjustment Procedure:
1. Pump the litter up to full height.
2. Lift the base hood, separating the hood from the base frame. Using the bungee cords, support the base
hood.
3. The descent rate needle valve is located on the base of the jack. Turn the needle valve clockwise, with
a screwdriver, to decrease the rate of descent. Turn it counterclockwise to increase the rate of descent.
4. Adjust the needle valve so that the foot end of the stretcher descends slightly faster than the head end.
(The factory settings are 3/4 turn from closed for the head end and 1 1/2 turn from closed for the foot end.)
NOTE
The larger percentage of a patient’s weight is located in the torso area. Adjust descent rate accordingly.
5. Remove the bungee cords supporting the base hood and secure the hood to the base frame.
NOTE
The jack descent rate was preset at the factory to drop the foot end faster than the head. It is recommended
that the foot drop faster to avoid patient disorientation.
REMOVAL OF EXCESS AIR (VACUUM) FROM THE HYDRAULIC SYSTEM
Procedure:
1. Verify all hydraulic linkages are secure and operating properly (see pedal linkage adjustment procedure
page 14).
2. Using pump pedal, actuate system several times. This will force the air through the system and the jack
should now pump up.
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