Service Information
20
JACK ASSEMBLY TORQUE SPECIFICATION
Jack Assembly with Threads Oiled
1. Jack Cap Assembly to Jack Actuator Cylinder 75 to 85 Foot Pounds
2. Jack Actuator Cylinder to Jack Base Assembly 55 to 65 Foot Pounds
Jack Base Assembly with Threads Oiled
1. Jack Pump Cylinder to Jack Base Machined 45 to 55 Foot Pounds
2. Jack Pin Housing to Jack Base Machined 35 to 45 Foot Pounds
3. Jack Base Plugs to Jack Base Machined 8 to 12 Foot Pounds
4. Jack Valve Plug to Jack Base Machined 8 to 12 Foot Pounds
5. Flow Control Valve to Jack Base Machined 16 to 20 Foot Pounds
CHECKING HYDRAULIC FLUID LEVEL
Required Tools:
3/8 Open End Wrench 3/4 Open End Wrench
Procedure:
WARNING
To avoid personal injury or damage to the stretcher, remove the litter and the base hood before beginning
service on the jacks.
1. Using a 3/8 open end wrench, remove square head set screws from both head and foot end jack support
tubes. Remove litter top and set aside.
2. Lift base hood off base frame and set aside.
3. Be sure there are no hydraulic leaks. If there are, jack replacement will be necessary.
4. Lower the jack to the full down position.
5. Using a 3/4 open end wrench, slowly turn the fill plug located on the side of the reservoir counterclockwise
to allow excess system pressure to vent. Remove the fill plug.
6. The hydraulic fluid should be visible at the bottom of the fill hole. If it is not, add Mobil Aero HFA hydraulic
fluid (Stryker part number 2020−70−475) until the fluid is visible at the bottom of the fill hole. Replace the
fill plug.
CAUTION
Use of other types of oil may damage hydraulic units.
7. Replace the hood and the litter.
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