Stryker Medical 1050, Maintenance Manual

Page: 14 / 108

Service Information
9
HYDRAULIC SYSTEM TROUBLESHOOTING
NOTE
Be sure the pedal linkage has been adjusted properly before beginning service on the jacks (see page 6).
PROBLEM/SYMPTOM SOLUTION
Jack will not raise to full height. Check for leaks. Add hydraulic fluid (see p. 10).
Jack will not hold in raised position. Check linkage to ensure it is not engaged. If linkage is
engaged, use a 7/16” socket or wrench to back off the nut
until the jack drift stops.
If the jack still does not hold, replace valve #1 (see p. 12).
Jack will not pump up and the jack actuator
rod
does not
move.
Close the needle valve. If the jack still will not pump up
after the needle valve is closed, replace valve #2 (see p.
13).
Jack will not pump up but the jack actuator rod
does
move when the pump pedal is activated.
Replace valve #2 (see p. 13).
Jack will not pump up and the jack actuator
rod may or may not move. Remove excess air (vacuum) in system (see p. 10).
Contact Stryker technical service at 1–800–327–0770 for further assistance
ELECTRICAL SYSTEM TROUBLESHOOTING
PROBLEM/SYMPTOM SOLUTION
Power light not on after power cord is plugged in.
Check wall receptacle for power.
Remove control board cover & check for voltage (12
VDC) – test point 12 VDC ref. to gnd.
If voltage is present, check power cord and replace,
if necessary.
Check fuses F1, F2, F3, F4 on logic board.
Bed will not raise electrically. Check fuse F4 on logic control board. Replace, if
necessary.
Plug power cord in, depress pump pedal fully and
listen for switch activation. Check adjustment of
switch inside the motor enclosure at the foot end of
the stretcher. Replace switch, if necessary.
Check power cord and replace, if necessary.
Replace pump motor.
No Gatch/Fowler function in either siderail. Check if lockout switch is on at either end of the
stretcher. Be sure siderail controls are activated.
Plug in power cord, press Gatch/Fowler switch and
listen for switch activation – replace switch, if neces-
sary.
If only one siderail is not working, replace switch
board in that siderail.
Check fuses F2 (Gatch) and F3 (Fowler) on logic
control board.
Check patient control switch cable and replace, if
necessary.
Replace Gatch and/or Fowler motors).