Service Information
12
BIG WHEEL CAM GAS SPRING DAMPENER REMOVAL
Required Tools:
1/2” Socket 3/8” Drive Ratchet Needle−Nose Pliers
1. Remove the litter top from the stretcher (see page 11).
2. Lift the base hood off the base frame.
3. Remove the two clevis pins and rue ring cotters connecting the brake rods to the drive arm at the center
of the base near the cam bracket assembly.
4. Pull the brake shafts straight out away from the base.
5. Remove the four hex washer head screws holding the cam bracket assembly to the base frame and re-
move the cam bracket assembly.
6. Remove the rue ring cotter from the dampener mounting pin and remove the pin.
7. Lift up on the (patient) left side of the cam bracket and remove the rue ring cotter holding the dampener
to the dampener arm and remove the dampener.
8. Reverse steps 1−7 to install the new dampener.
SIDE CONTROL BIG WHEEL LINKAGE ASSEMBLY REMOVAL
Required Tools:
1/4” Punch Hammer Needle−Nose Pliers
String or Bungee Cords
1. Pump the litter up to full height.
2. Lift the base hood and support it from the litter using string or bungee cords.
3. Using a hammer and 1/4” punch, drive out the slotted spring pin connecting the butterfly “V” pedal on the
patient’s right side to the side control wheel axle.
4. Remove the butterfly “V” pedal and set it aside.
5. Using the hammer and 1/4” punch, drive out the slotted spring pin holding the side control Big Wheel link-
age yoke weldment to the side control wheel axle.
6. Pull straight out on the patient’s left side butterfly “V” pedal and remove the side control wheel axle.
7. Using needle−nose pliers, remove the hair pin cotter and washer holding the toggle pivot plate to the side
control Big Wheel carriage assembly.
8. Remove the rue ring cotter and clevis pin connecting the side control Big Wheel linkage rod end link to
the end control brake rod.
9. Remove the side control Big Wheel linkage assembly and set it aside.
10. Reverse steps 1−9 to reinstall the linkage assembly.
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