Hill-Rom DuraStar Series, Service Manual

Page: 82 / 165

4.7 Stretcher Hydraulic Cylinder
Chapter 4: Removal, Replacement, and Adjustment Procedures
DuraStar™ Series Stretcher Service Manual (man268) Page 4 - 25
4
9. Check the pump release adjustment (refer to procedure 4.10).
10. Install the base shroud, bellow, and bellow attachment plates over the
cylinder (see figure 4-6 on page 4-14).
WARNING:
Ensure you use proper lifting methods. Personal injury can occur. The
weight of the lower frame, with one end of the upper frame still secured
to the hydraulic cylinder, acts as a counterweight during the lifting
process. One person can safely perform this procedure.
CAUTION:
Be careful not to damage the base shroud when you install the upper
frame assembly.
11. Lift the upper frame, and put the round crosstube (C) onto the cylinder (see
figure 4-10 on page 4-21).
12. Using the ratchet and the 9/16" socket, install the washer (D), lockwasher
(B), and bolt (A) to secure the upper frame to the hydraulic cylinder.
13. Using the torque wrench, torque the bolt (A) to 125 + 19 in-lb (14.1 + 2.1
N·m).
14. Raise the stretcher to the high position.
15. If more than 24 pumps are required to raise the stretcher to the high
position, purge the hydraulic cylinders as follows:
a. Push the release pedal, and lower the stretcher to the low position.
b. Hold the release pedal down, and pump one of the pump pedals
approximately 30 times.