Stryker 3000 - S 3.5 Knee Gatch Does Not Raise;Lower Electrically

Chapter Three – Troubleshooting Guides
42
3.5 KNEE (GATCH) SECTION RAISE/LOWER TROUBLESHOOTING GUIDE
(CONTINUED)
PROBLEM/SYMPTOM SOLUTION(S)
Knee Gatch does not raise electrically.
Knee Gatch does not lower electrically
(continued).
E. Check knee up/down motor (p/n 3000–300–
419) for operation. If motor is not operating, check
for 110 VAC supply to motor. If 110 VAC is pres-
ent and motor does not turn, replace motor (see
page 101). Check knee up/down motor capacitor
(p/n 3000–300–401). Replace, if necessary (see
page 101).
F. Check for +5 VDC at pendant port cable (p/n
3000–915–839), pin11. If voltage is not present,
check pin 11 of connector P5 on the headwall IFC
board. Use connector P1, pin 7 as a ref. point.
Replace headwall IFC and cables, if necessary
(see page 199 & 211 for board & cable locations).
G. Check headwall IFC board for +5 VDC (P5, pin
11) output to pendant switches. Use connector
P1, pin 7 as a ref. point. Replace headwall IFC
and cables, if necessary (see page 199 & 211 for
board & cable locations).
H. Replace any one of the following boards, if nec-
essary. (Verify interconnecting cables and con-
nections prior to board replacement.):
1.) Foot board IFC board (p/n 3000–500–955)
2.) Litter CPU board (p/n 3000–300–941)
3.) Signal junction board (p/n 3000–300–963)
4.) Headwall IFC board (p/n 3000–303–933). (See
page 199 for board locations).
I. If motor is operating and knee does not move or
moves incorrectly, check the following mechanical
items:
1.) Screw shaft turns but knee section does not
move: Gatch nut damaged (see page 99 & 100).
2.) Motor coupling not turning with motor shaft:
check coupling and set screw. Replace and tight-
en as necessary. Check coupling for proper op-
eration. Check key on motor drive shaft. If key is
missing or damaged, coupling will not turn with
motor properly.
3.) Main lift bracket not raising and lowering in
conjunction with screw shaft. Check for broken/
missing bolt.
J. Check mechanical mechanisms for excessive
noise. Inspect and align/lubricate the following:
1.) Motor mount bushings
2.) Gatch nut slide surface
3.) Motor coupler (blue bushing)
4.) Bushings on litter sections