4.14 Electric Stretcher Potentiometer
Chapter 4: Removal, Replacement, and Adjustment Procedures
Page 4 - 44
TranStar® PC-100/PC-200/PC-300/PC-350/PC-400/PC-450/
PC-500/PC-550/TR-500/SG-500/OB-450/OB-550/EL-550
Series Stretcher Service Manual (man115re)
10. Lower the head section with the CPR release handle to gain access to the
potentiometer (L).
11. Using the ratchet and the T25 Torx® head bit, remove the screw (K) and
cable clamp (J).
12. Using the ¼" Allen™ wrench, remove the setscrew (B) from the side of the
potentiometer cable assembly (A).
13. Using the ¼" Allen™ wrench, remove the setscrew (D) from the
potentiometer weldment (F).
14. Using the ¼" Allen™ wrench, remove the setscrew (C) from the
potentiometer can (E).
15. Pull the potentiometer can back that has the wiring assembly going
through, and disconnect the potentiometer cable assembly (A).
16. Remove the potentiometer cable assembly (A), the potentiometer
weldment (F), and the potentiometer can (E) from the potentiometer
tube (G).
NOTE:
The potentiometer tube is welded to the upper frame.
Replacement
Perform the removal procedure in reverse order.
Adjustment
1. Plug the stretcher into an appropriate power source, and put the back
section down by pressing the head down arrow on the patient control
switch located on the siderail (see figure 2-1 on page 2-28).
2. Using the 6" straight edge, measure the gap between the bottom surface of
the back section (O) and the top of the head section support bracket (P)
(see figure 4-23 on page 4-45). The gap must be 1/8" (3.2 mm) to
½" (12.7 mm). If the measurement is 1/8" (3.2 mm) to ½" (12.7 mm), no
further adjustment is necessary. If not, go to step 3 of Adjustment.
