4.21 Electric Stretcher Head Drive Assembly
Chapter 4: Removal, Replacement, and Adjustment Procedures
TranStar® PC-100/PC-200/PC-300/PC-350/PC-400/PC-450/
Page 4 - 67
PC-500/PC-550/TR-500/SG-500/OB-450/OB-550/EL-550
Series Stretcher Service Manual (man115re)
4
WARNING:
Do not use retaining rings that are overextended. Personal injury and
equipment damage could occur.
2. Using the retaining ring removal/installation tool, install the retaining ring
(A) onto the actuator mounting pin (E).
3. Install the O-ring (Q) onto the head drive assembly (O). Make sure the O-
ring is seated against the flange of the head drive assembly (see figure 4-32
on page 4-66).
4. Connect the two electrical connectors (P), and install the head motor
housing (G).
5. Using the phillips head screwdriver, install the four screws (D) and
washers (C) that secure the head motor housing (G) (see figure 4-31 on
page 4-65).
6. Using the ratchet and the T25 Torx® head bit, install the ground screw (B)
that secures the ground strap (F) to the head drive assembly (O).
7. Support the head drive assembly (O), and put the gearbox shaft in the head
drive assembly.
8. Apply blue Loctite® 242 adhesive to the threads of the cable attachment
screws (M) and actuator mounting bolts (J).
9. Using the ratchet and ½" socket, install the two cable attachment screws
(M) that secure the head drive assembly (O) and the CPR cable assembly
(N).
10. Using the torque wrench, torque the two cable attachment screws (M) to
210 + 30 in-lb (23.7 + 3.4 N·m).
11. Using the ratchet and ½" socket, tighten the four actuator mounting bolts
(J) that secure the head drive assembly (O) to the base frame bracket (L).
12. Align the hole in the gearbox shaft with the hole in the head drive
assembly (O). Using the hammer, install the roll pin (H) through the
gearbox shaft and the head drive assembly (O).
13. Plug the stretcher into an appropriate power source, and check for proper
operation.