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Chapter Five – Maintenance Procedures – Litter
100
5.4 KNEE SECTION (CONTINUED)
DRIVE SCREW AND NUT REPLACEMENT – KNEE MOTOR (CONTINUED)
A
B
C
F
E
TOP VIEW
D
G
H
J
6. Place the carriage assembly on a work bench in the position shown in the illustration above. Remove the
motor if it hasn’t already been done (see page 101).
7. Using a 3/16” punch and a hammer, remove the roll pin (A) at the left end of the carriage assembly.
8. Remove the washer (B) and bushing at the left end of the carriage assembly.
9. Turn the drive screw (C) counterclockwise to access the roll pin (H) holding the coupler (D) on the drive
screw.
10. Support the drive screw on the carriage housing. Do not let the plastic portion of the coupler rest on the
carriage housing.
11. Using a 3/16” punch and hammer, remove the roll pin (H) holding the coupler on the drive screw.
12. Pull the coupler off the drive screw and remove the bearing, washer and bushing.
13. Turn the drive screw clockwise and out of the right end of the carriage.
14. Remove the washer (J) from the right end of the drive screw.
15. Slide the drive screw back to the right and through the end of the carriage.
16. Turn the drive screw to remove it from the drive screw nut (E).
17. Using a 7/16” socket and 7/16” open end wrench, remove the nut, bolt and washer (F) holding the drive
screw nut and the cam wire link to the main link (G).
18. Reverse the above steps to install the new drive screw and nut and to reattach all components to the bed.
Check bushings removed in steps 7 and 11 for wear and replace, if necessary.
NOTE
Generously apply grease to the drive screw nut when installing the new nut.
Before reinstalling the carriage assembly on the litter, manually turn the drive nut approximately half–way
down the length of the drive screw. This will allow easier realignment to the litter.
CAUTION
Assure the knee motor stops properly at both upper and lower electric limits. If it does not, refer to page 97
for ”Limit Setting – Knee Motor”.
Summary of Contents for Secure 3000
Page 78: ...Notes 78 ...
Page 106: ...Notes 106 ...
Page 184: ...Notes 167 2 ...
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Page 243: ...Appendix B Circuit Board Locations Bed Wiring Diagrams 224 This page intentionally left blank ...
Page 249: ...DH 3 94 3000 000 020 REV B 420 Alcott Street Kalamazoo MI 49001 ...