Stryker 721, Maintenance Manual

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8
Service Information
PEDAL LINKAGE ADJUSTMENT – DUAL SIDE CONTROL BASE
Required Tools:
3/32 Hex Allen Wrench
7/16 Open End Wrench
1/2 Open End Wrench
(2) Wooden blocks (10 – 12 inches in length)
Adjustment Procedure:
1. Pump the litter up to full height.
2. Lift the base hood, separating the hood from the base frame. Using the wooden blocks, support the base
hood.
3. To adjust the foot end descent pedal, use a 5/32 hex Allen wrench to loosen the set screw (C) in the stop
collar (D) on the release rod. Hold the pedal parallel to the floor and slide the collar up to the bracket on
the release rod. Tighten the set screw on the stop collar. Be sure the head end and foot end descent
pedals are level with each other. Repeat for the head end pedal, if necessary.
4. Once the pedals are level, be sure the paddle on the end of the release rod for the foot end jack is slightly
touching the actuating stem on the jack base. If it is not, use a 3/32 hex Allen wrench to loosen the set
screw on the paddle hub. Adjust the paddle to
JUST
touch the stem of the jack. Tighten the set screw
in the paddle hub. Repeat for the head end jack, if necessary.
5. Depress the pedal for the foot end jack. The jack should start to descend about the same time the paddle
on the end of the rod contacts the sleeve on the jack actuating stem. The bracket on the foot pedal body
should hit the stop screw (B). Any further movement could cause damage to the stem components inside
the jack housing. To adjust the stop screw, use a 1/2 open end wrench to loosen the hex jam nut (A).
Turn the screw and re–tighten the hex jam nut. Repeat for the head end jack.
6. Pump the litter up to full height.
7. Step on both descent pedals at the same time. Both ends of the litter should lower with the foot end lower-
ing slightly faster than the head end. If it does not, refer to the procedure for adjusting the jack descent
rate.
8. Remove the wooden blocks supporting the base hood. Use the pedal cut–outs on the side of the hood
as a guide for proper re–positioning.