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ADJUSTABLE PRESSURE COMPENSATED (P.C.) VALVE REPLACEMENT
P.C. Valve Part Number 5050−70−50
WARNING
To avoid personal injury or damage to the stretcher, always remove the litter and the base hood before begin-
ning service on the jacks. Lower the jack rod completely to relieve the pressure on the pump piston side of
the jack.
Required Tools:
3/8" Wrench
Replacement Procedure:
NOTE
It requires two people to safely perform this procedure.
1. Apply the stretcher brakes. Raise the litter to full up. Raise the Fowler and the siderails.
2. Using a 3/8" wrench, remove the bolts in the litter support tubes above the black bellows on both ends
of the litter.
3. With the assistance of another person, lift the litter off the base and set it aside, taking care not to damage
the leg section linkages and other litter components.
4. Push down on the jack actuator to put the jack in the full down position.
5. Lift off the plastic base hood, separating the Velcro holding it to the base frame.
6. Using a 13/16" wrench, remove the adjustable P.C. valve (see
7. Check for any contaminants in the valve as well as in the jack base.
8. Install the replacement P.C. valve. Moisten the O−ring seal with hydraulic fluid to ensure a tight seal.
9. Tighten the valve manually and then an additional 1/8−1/4 turn with a 13/16" wrench. Do not over −tight-
en or damage may occur to the O−ring seal.
10.
Pump up the jack to the maximum height and fully lower it to verify proper operation.
11.
Check for any hydraulic fluid leaks before replacing the base hood and litter.
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Service Information
13/16" Wrench
16
page 31
for part reference).
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