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1. Make sure that the trolley hydraulics have sufficient oil in the reservoir when the lifting arms are all the way down. Look
for any leaks and repair, if necessary.
NNoottee -- The oil level should be just below the fill port.
2. Close the docked/locked latch and use the trolley control panel to cycle the lifting arms up and down a few times without
a cot.
3. Check for proper operation of the support sensor (6390-001-452). Make sure that both switches have continuity when
you apply weight < 100 lb to the lifting arms.
a. If no continuity, replace the rod end assembly (6390-001-040).
4. Check for loose cable connections from support sensors to the control board.
5. Replace the hydraulics assembly (6390-001-039).
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1. Check the angle position sensor (APS) (6390-001-397) calibration set point. Contact Stryker Technical Support.
2. Remove the patient right side cover and make sure that the hydraulic cylinder is not “over-stroking.”
NNoottee -- A ~1/8" back settle in the rod of the hydraulic cylinder at full extension is a sign of the over-stroke condition
3. Check for damage of components in the chain of load bearing parts from the lifting arms to the patient right side plate
(6390-001-344).
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Check the trolley control panel LEDs.
NNoottee -- The LEDs should be solid green without any solid amber error indication.
1. If no trolley control panel LEDs are illuminated, press the main power button to turn the product on.
NNoottee -- You may need to turn the product on and then off to make sure that the PPoowweerr--LLOOAADD is not in sleep mode.
2. If trolley control panel LEDs are illuminated:
a. Flashing amber means the battery is low.
b. Return the trolley to the transport position.
c. Make sure that the product begins to charge as indicated by a flashing green battery LED.
NNoottee -- Low battery indication (flashing amber) may continue while the battery recharges.
d. Solid green battery LED and solid amber LED means system error. Contact Stryker Technical Support for advanced
troubleshooting.
3. Check the following items:
a. Hydraulics assembly (6390-001-039)
b. Motor cable (6390-101-431)
c. Angle position sensor (APS) (6390-001-037)
d. Control board assembly (6390-101-014)
4. Pull the trolley from the transport position. If you hear the motor running as you pull the product from the transport
position toward the loading position, the problem is with the hydraulic unit.
5. Check the magnet in the anchor pawl at the head end that initiates jog down. Make sure that the pawl is securely
connecting with the catch on the trolley when the trolley is in the transport position and that the trolley is not stuck.
EN 24 6390-309-002 Rev AB.0
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