Stryker Stretcher 721

Pump the litter up to full height

Lift the base hood and support it from the litter frame using bungee cords

Using a 9/16” wrench, remove the two side bolts on the cam adjuster block

Release the brakes and engage the big wheel

Adjust the two top bolts on the adjuster block equal amounts so the foot end casters are raised off the floor 1/4”. Reinstall the two side bolts on the cam adjuster block after applying Loctite to both bolts

Remove the bungee cords and reinstall the base hood

Verify the brake and steer functions are working properly before returning the bed to service

Warning: Ensure the caster is stable before starting the procedure

Cover aligned with axle nut or bolt head

Single prong engaged with caster horn

Upload a photo of the installed cover

Large screwdriver inserted into cut-out in side of wheel cover and into the space between the double prongs

Cover disengaged from double prongs

Cover disengaged from single prong

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.

Lift base hood off base frame and set aside.

If there are hydraulic leaks, jack replacement will be necessary.

Lower the jack to the full down position.

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.

Is the hydraulic fluid visible at the bottom of the fill hole?

If the hydraulic fluid is not visible at the bottom of the fill hole, add Mobil Aero HFA hydraulic fluid (Stryker part number 2020-70-475) until the fluid is visible.

Refer to Pneumatic Fowler Assemblies, page 54 or page 55 for parts reference.

Fowler moved to 75 or higher for easier access

Nuts (item E) in the actuator arms on the end of the trip bar (M) loosened using a 1/2” open end wrench

Fowler adjusted using a 5/32” hex Allen wrench to turn the Allen screws (item J) 1 to 2 turns counterclockwise if the Fowler will not move or 1 to 2 turns clockwise if the Fowler will not hold its position

Fowler travels from flat to 90 and down again and holds its position when weight is applied before returning the stretcher to service

Sign off on the Pneumatic Fowler Adjustment

Raise Fowler to full up and raise siderails

Remove the bolt in the litter support tube above black bellows on both ends using a 3/8” wrench

Lift off the stretcher litter and set it aside, taking care not to damage the siderails, etc.

Push down on the jack actuator to put the jack in the full down position

Lift off the plastic base hood, separating the Velcro holding it to the base frame

Remove the four bolts, washers and nuts holding the jack support straps to the base frame using a 1/2” socket and 1/2” wrench

Remove the two cotter keys on the pump link and remove the pump link using needle-nosed pliers