www.stryker.com 6390-009-002 REV D 27
Troubleshooting
Trolley does not lock in the loading position
If the trolley is unlocking from the transfer
1. Remove the cot.
2. Put the trolley in the middle of the transfer.
3. On the extended transfer (located just to the head end of the foot end fastener), the transfer trolley pawl (6390-001-
073) should be sticking out of the transfer about 1/2”. If the pawl is not sticking up or does not return when pressed,
check its return spring. Make sure that there is no debris jamming the return spring.
4. Make sure that the pin of the roller in the pawl is not sticking out on either side.
5. Remove the transfer head end dead stops.
6. Remove the transfer from the anchor.
7. Clear any debris or foreign material from the top of the anchor and the channels in the transfer.
Note: Foreign objects that do not allow the trolley to reach the full out position could cause the mechanism to not
operate properly.
8. Inspect the trolley stop ramp (6390-001-325) on the underside of the trolley middle mechanism to make sure that it
is present and secure.
If the transfer is unlocking from the anchor
1. Remove the cot.
2. Move the trolley to the mid position.
3. Check for debris around the transfer lock trigger (6390-001-231).
4. Push the transfer all the way to the transport position.
5. Pull on the transfer to make sure it is locked.
6. If the transfer is not locked, the problem is likely that the transfer lock pin in the anchor is stuck or broken.
7. Check the return spring and look for burrs or debris.
Trolley will not unlock from the transfer position
1. Remove the cot.
2. Using the head end transfer lock override slide (6390-001-261), move the transfer in and put the trolley in the mid
position.
Trolley pump runs for an extended time after cot jog up
1. Check the angle position sensor (APS) (6390-001-397) calibration set point. Call Stryker Service.
2. Remove the patient right side cover. Make sure that the hydraulic cylinder is not “over-stroking.”
Note: Over-stroke condition is evidenced by a ~1/8 in. back settle in the rod of the hydraulic cylinder at full
extension.
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).
Cot does not lock into the trolley and LEDs flash amber
1. Remove the cot from Power-LOAD.
2. Make sure that the cot is a Power-LOAD compatible cot and that the load wheel horns and pins (6500-002-104) are
present, properly tightened, and in good condition.
3. Make sure that the handle release mechanism (6390-001-046) moves freely and the release handles return to the
full down position. Make sure that there is no debris under the release handles.
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