Stryker Medical Renaissance Series User manual

Renaissance Series
1050/1550 Extended Stay Stretcher
MAINTENANCE MANUAL
For Parts or Technical Assistance:
1–800–327–0770
IMPORTANT
File in your
maintenance
records

Table of Contents
Introduction
Specifications 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning / Caution / Note Definition 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preventative Maintenance
Cleaning 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checklist 4.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Information
Siderail Latch Adjustment 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pedal Linkage Adjustment 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caster Assembly Replacement 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caster Maintenance 7.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caster Cover Installation And Removal 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Hydraulic Fluid Level 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal Of Excess Air (Vacuum) From The Hydraulic System 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jack Descent Rate Adjustment 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Check Valve Replacement – Non Electric Lift Base
Replacement Of Valve #1 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement Of Valve #2 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement Of Valve #3 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Pressure Hose Replacement 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Lubrication Points 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Adjustment 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Cam Replacement 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Ring Replacement 16, 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Cord Replacement 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Static Discharge Precautions 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switch Replacement/Adjustment 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jack/Motor Replacement 20, 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fowler Lift Motor/Actuator Replacement 21, 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gatch Lift Motor/Actuator Replacement 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fowler And Knee Gatch Motor/Actuator Adjustment 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fowler And Knee Gatch Limit Switch Adjustment 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Logic Circuit Board Replacement 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Patient Control Lockout Switch Replacement 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Patient Control Lockout LED Replacement 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siderail Patient Control Replacement 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement Parts 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly Drawings and Parts Lists
Base/Hood Assembly without Electric Lift 28, 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Side Control Base Assembly (with Brakes) 30, 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Adjuster Assembly 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Cam Assembly 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caster Assembly with Steerlock 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caster and Caster Cover Replacement Kits 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fifth Wheel Assembly 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Side Control Base Assembly (with Jacks) 36, 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Pedal Assembly 38, 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
Assembly Drawings and Parts Lists (Continued)
Jack Assembly, Non–Electric Lift Base 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jack Base Assembly, Non–Electric Lift Base 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electric Lift Base Assembly 42–45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switch Assembly 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Connecting Rod Assembly 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jack/Pump Motor Assembly 48, 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jack Assembly, Electric Lift Base 50, 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jack Base Assembly, Electric Lift Base 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Labeling Assembly 53–55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litter Assembly 56–67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fowler/Gatch Quick Drop Assembly 68–69.2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quick Drop Assembly, Fowler Only 70–71.2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powered Fowler and Gatch Assembly 71.4, 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Push Handle Assembly 73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fowler Crankscrew w/Actuator 74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fowler Crankscrew Assembly, Non–Quick Drop 75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gatch Crankscrew w/Actuator 76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gatch Crankscrew Assembly, Non–Quick Drop 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siderail Assembly 78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Housing Assembly 79, 80. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–Stage I.V. Pole Mounting Assembly 81. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–Stage I.V. Pole Assembly 82. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–Stage I.V. Mounting Assembly 83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–Stage I.V. Pole Assembly 84, 85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2nd Stage Assembly 86. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3rd Stage Assembly 87. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Upright Oxygen Bottle Holder Assembly 88. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fowler X–Ray Cassette Assembly 89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
X–Ray Cassette Mounting Assembly 90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defibrillator Tray Assembly 91. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C–Spine Cassette Holder Assembly 92. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C–Spine Support Pole Assembly 93. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C–Spine Storage Bracket Assembly 94. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limited Warranty
Obtaining Parts and Service 95. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supplemental Warranty Coverage 95. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Return Authorization 96. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Freight Damage Claims 96. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3
Introduction
INTRODUCTION
This manual is designed to assist you with the maintenance of the 1050/1550 Synergy Series Extended Stay
Stretcher. Read it thoroughly before using the equipment.
SPECIFICATIONS
1050 1550
Maximum Weight Capacity 500 pounds 500 pounds
Overall Bed Length/Width 83.5”/31”83.5”/34”
Minimum/Maximum Bed Height 22”/35”22”/35”
Knee Gatch Angle 0_to 30_0_to 30_
Fowler Angle 0_to 70_(Electric), 0_to 90_
(Crank) 0_to 70_(Electric), 0_to 90_ (Crank)
Trendelenburg/Reverse Trendelenburg +12_/–18_+12_/–18_
Electrical Requirements 110 VAC, 60 Hz, 5.0 Amp 110 VAC, 60 Hz, 5.0 Amp
WARNING / CAUTION / NOTE DEFINITION
The words WARNING, CAUTION and NOTE carry special meanings and should be carefully reviewed.
WARNING
The personal safety of the patient or user may be involved. Disregarding this information could result in injury
to the patient or user.
CAUTION
These instructions point out special procedures or precautions that must be followed to avoid damaging the
equipment.
NOTE
This provides special information to make maintenance easier or important instructions clearer.
WARNING
Patients should be discouraged from sitting directly on the ends of the stretcher. Excessive weight will cause
the litter surface to tip up, possibly causing patient injury.

4
Preventative Maintenance
CHECKLIST (PERFORM A MINIMUM OF BIANNUALLY)
All fasteners secure (reference all assembly prints)
Siderails move and latch properly (page 5)
All casters lock with brake pedal engaged (page 15)
Steer function working properly
All casters secure and swivel properly
Body restraints working properly
I.V. pole intact and operating properly (page 81–87)
Oxygen bottle holder intact and operating properly (page 88)
Fowler operates properly
Knee Gatch operates properly
Trendelenburg/Reverse Trendelenburg operates properly
No rips or cracks in mattress cover
Ground chain intact
No leaks at hydraulic connections
Hydraulic jacks holding properly (page 9)
Hydraulic drop rate set properly (page 11)
Hydraulic oil level sufficient (page 10)
Lubricate where required, including the brake adjuster assembly and brake cam (page 15)
Accessories and mounting hardware in good condition and working properly
Serial No.
Completed By:_________________________________ Date:_____________

Cleaning
4.1
Clean Velcro AFTER EACH USE. Saturate Velcro with disinfectant and allow disinfectant to evaporate. (Ap-
propriate disinfectant for nylon Velcro should be determined by the hospital.)
In general, when used in those concentrations recommended by the manufacturer, either phenolic type or
quaternary type disinfectants can be used with Staph–Chek fabrics. Iodophor type disinfectants are not rec-
ommended for use on Staph–Chek fabrics because staining may result. The following products have been
tested by the Herculite Laboratory and have been found not to have a harmful effect on Staph–Chek fabrics
WHEN USED IN ACCORDANCE WITH MANUFACTURERS RECOMMENDED DILUTION.*
TRADE NAME DISINFECTANT
TYPE MANUFACTURER *MANUFACTURER’S
RECOMMENDED
DILUTION
A33 Quaternary Airwick (Professional Products Division) 2 ounces/gallon
A33 (dry) Quaternary Airwick (Professional Products Division) 1/2 ounce/gallon
Beaucoup Phenolic Huntington Laboratories 1 ounce/gallon
Blue Chip Quaternary S.C. Johnson 2 ounces/gallon
Elimstaph Quaternary Walter G. Legge 1 ounce/gallon
Franklin Phe-
nomysan F2500 Phenolic Purex Corporation 1 1/4 ounce/gallon
Franklin Sentinel Quaternary Purex Corporation 2 ounces/gallon
Galahad Phenolic Puritan Churchill Chemical Company 1 ounce/gallon
Hi–Tor Quaternary Huntington Laboratories 1/2 ounce/gallon
LPH Phenolic Vestal Laboratories 1/2 ounce/gallon
Matar Phenolic Huntington Laboratories 1/2 ounce/gallon
Omega Quaternary Airwick (Professional Products Division) 1/2 ounce/gallon
Quanto Quaternary Huntington Laboratories 1 ounce/gallon
Sanikleen Quaternary West Chemical Products 2 ounces/ gallon
Sanimaster II Quaternary Service Master 1 ounce/gallon
Vesphene Phenolic Vestal Laboratories 1 1/4 ounce/ gallon
Quaternary Germicidal Disinfectants, used as directed, and/or Chlorine Bleach products, typically 5.25% So-
dium Hypochlorite in dilutions ranging between 1 part bleach to 100 parts water, and 2 parts bleach to 100
parts water are not considered mild detergents. These products are corrosive in nature and may cause dam-
age to your stretcher if used improperly. If these types of products are used to clean Stryker patient handling
equipment, measures must be taken to insure the stretchers are rinsed with clean water and thoroughly dried
following cleaning. Failure to properly rinse and dry the stretchers will leave a corrosive residue on the surface
of the stretcher, possibly causing premature corrosion of critical components. Failure to follow the above
directions when using these types of cleaners may void this product’s warranty.
REMOVAL OF IODINE COMPOUNDS
This solution may be used to remove iodine stains from mattress covers and foam.
1. Use a solution of 1–2 tablespoons Sodium Thiosulfate in a pint of warm water to clean the stained area.
Clean as soon as possible after staining occurs. If stains are not immediately removed, allow solution to
soak or stand on the surface.
2. Rinse surfaces exposed to the solution in clear water before returning the stretcher to service.

Notes
4.2

Service Information
5
SIDERAIL LATCH ADJUSTMENT
Required Tools:
1/8 Hex Allen Wrench
WARNING
The siderail latch adjustment is pre–set at the factory, and there should not normally be a need for readjust-
ment. If adjustment must be done it is important to follow the procedure below. If it is not done properly, injury
to the patient or user could occur.
Adjustment Procedure:
1. Using a 1/8 hex Allen wrench, adjust the hex Allen screw located on the latch assembly opposite the latch.
Turning the Allen screw clockwise will DECREASE the amount of ”play”in the latching mechanism. Turn-
ing counterclockwise will INCREASE the amount.
NOTE
The amount of ”play”in the siderail, when in full up engaged position, should be approximately 1/8 to 3/16
inches.
CAUTION
Too much ”play”when the siderail is in the full up engaged position will give the siderail the appearance of
being unstable and could also cause premature wearing of the latch system.
Too little ”play”will obstruct the latch and keep it from engaging completely in the full up position, which may
cause damage to the latch and/or injury to the patient or user.

Service Information
6
PEDAL LINKAGE ADJUSTMENT –DUAL SIDE CONTROL BASE

Service Information
7
CASTER ASSEMBLY REPLACEMENT

Service Information
7.1
CASTER MAINTENANCE

Notes
7.2

Service Information
8
CASTER COVER INSTALLATION AND REMOVAL
Double Prongs
Single Prong
align cover with axle nut or bolt head, as shown.
Push down on the opposite side of the cover until
single prong engages with caster horn.
Push with palm on cover until
ProperlyAttached
Cover
To remove wheel cover, insert large screwdriver into cut–out in
side of wheel cover and into the space between the double prongs.
Pry up cover to disengage double prongs and push sharply upward
double prongs engage.
1.
2.
3.
Looking through the larger of the two side cut–outs,
Top View (Cut–Away)
Top View (Cut–Away)
Top View (Cut–Away)
to disengage single prong.

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).

Service Information
10
CHECKING HYDRAULIC FLUID LEVEL
Required Tools:
3/8 Open End Wrench 3/4 Open End Wrench
Procedure:
WARNING
To avoid personal injury or damage to the stretcher, remove the litter and the base hood before beginning
service on the jacks.
1. 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.
2. Lift base hood off base frame and set aside.
3. Be sure there are no hydraulic leaks. If there are, jack replacement will be necessary.
4. Lower the jack to the full down position.
5. 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.
6. The hydraulic fluid should be visible at the bottom of the fill hole. If it is not, add Mobil Aero HFA hydraulic
fluid (Stryker part number 2020–70–475) until the fluid is visible at the bottom of the fill hole. Replace the
fill plug.
CAUTION
Use of other types of oil may damage hydraulic units.
7. Replace the hood and the litter.
REMOVAL OF EXCESS AIR (VACUUM) FROM THE HYDRAULIC SYSTEM
Procedure:
1. Verify all hydraulic linkages are secure and operating properly (see pedal linkage adjustment procedure
page 6).
2. Using pump pedal, actuate system several times. This will force the air through the system and the jack
should now pump up.

Service Information
11
JACK DESCENT RATE ADJUSTMENT
Required Tools:
Screwdriver Bungee Cords
Adjustment Procedure:
1. Pump the litter up to full height.
2. Lift the base hood, separating the hood from the base frame. Using the bungee cords, support the base
hood.
3. The descent rate needle valve is located on the base of the jack. Turn the needle valve clockwise, with
a screwdriver, to decrease the rate of descent. Turn it counterclockwise to increase the rate of descent.
4. Adjust the needle valve so that the foot end of the stretcher descends slightly faster than the head end.
(The factory settings are 3/4 turn from closed for the head end and 1 1/2 turn from closed for the foot end.)
NOTE
The larger percentage of a patient’s weight is located in the torso area. Adjust descent rate accordingly.
5. Remove the bungee cords supporting the base hood and secure the hood to the base frame.
NOTE
The jack descent rate was preset at the factory to drop the foot end faster than the head. It is recommended
that the foot drop faster to avoid patient disorientation.

Service Information
12
HYDRAULIC CHECK VALVE REPLACEMENT –NON–ELECTRIC LIFT BASE
Required Tools:
3/8 Box End Wrench Stiff Wire (with bent, pointed end) Small Needle Nose Pliers
3/4 Open End Wrench Torque Wrench (with Ft. Lbs. adjust.)
7/32 Hex Allen Wrench 1/2 Inch Diameter Rod
Replacement of Valve #1
WARNING
To avoid personal injury or damage to the stretcher, remove the litter and the base hood before beginning
service on the jacks. Lower the jack rod completely to relieve the pressure on the pump piston side of the
jack. This will prevent large hydraulic fluid loss and possible damage when the base plugs are removed.
1. Using a 3/8 box end wrench, remove square head set screws from both head and foot end jack support
tubes. Remove litter top and set aside.
2. Lift base hood off base frame and set aside.
3. Lower jack to full down position. The actuator must be manually lowered while depressing the appropriate
release pedal.
4. Remove the pin body assembly (4) with a 3/4 open end wrench and discard the housing gasket (5).
NOTE
Although the hydraulic fluid is not under pressure, some fluid loss will occur. The fluid loss should be minimal
but covering the floor is advisable.
5. Using a 7/32 hex Allen wrench, remove the valve plug (6).
6. Using a stiff wire with a bent pointed end, remove and discard the valve (1) and the seal (7).
7. Install the new seal (7) flat to the bottom of its hole with a 1/2 inch diameter rod and install the new valve
(1) with the beveled end out (as shown in the illustration).
8. Install the valve plug (6) with the countersunk end first and the beveled end out. Tighten to 10 ft.–lbs torque.
9. Install the pin body assembly (4) with the new housing gasket (5) and tighten to 10 foot–pounds torque.
10. Pump up the jack to the maximum height. Apply weight to be sure the jack holds its position and there
are no hydraulic leaks before replacing the base hood and the litter.

Service Information
13
HYDRAULIC CHECK VALVE REPLACEMENT –NON–ELECTRIC LIFT BASE (CONTINUED)
Replacement of Valve #2
WARNING
To avoid personal injury or damage to the stretcher, remove the litter and the base hood before beginning
service on the jacks. Lower the jack rod completely to relieve the pressure on the pump piston side of the
jack. This will prevent large hydraulic fluid loss and possible damage when the base plugs are removed.
1. Remove the base plug (8) and discard the seal (9).
2. Remove the valve plug (10).
3. Using a stiff wire with a bent, pointed end, remove the valve (2) and the seal (11) and discard the seal.
4. Install the new seal (11) flat to the bottom of its hole with a 1/2”diameter rod.
5. Install the new valve (2) with the beveled end out (as shown in the illustration).
6. Install the valve plug (10) and tighten to 10 foot–pounds torque.
7. Install the new seal (9) with the base plug (8) and tighten to 10 foot–pounds torque.
8. Pump up the jack to the maximum height.
9. Be sure there are no hydraulic leaks before replacing the base hood and the litter.
Replacement of Valve (Poppet) #3
WARNING
To avoid personal injury or damage to the stretcher, remove the litter and the base hood before beginning
service on the jacks. Lower the jack rod completely to relieve the pressure on the pump piston side of the
jack. This will prevent large hydraulic fluid loss and possible damage when the base plugs are removed.
1. Remove the base plug (12) and discard the seal (13).
2. Remove the compression spring (14).
3. Using a small needle nose pliers, remove the poppet (3).
4. Install the new poppet (3).
5. Install the compression spring (14).
6. Install the new seal (13) and the base plug (12) and tighten to 10 foot–pounds torque.
7. Pump up the jack to the maximum height to check its operation.
8. Check for hydraulic leaks before replacing the base hood and the litter.

Service Information
14
HYDRAULIC PRESSURE HOSE REPLACEMENT
40”Hose Part Number 1550–71–136”Hose Part Number 1550–71–7
Required Tools:
Large Phillips Screwdriver 9/16”Open End Wrench 11/16”Open End Wrench
6”3/8 Drive Extension 3/8”Drive Ratchet Paper Towels or Rags
String or Bungee Cord Modified Flair Nut Wrench –p/n 1550–570–5
Procedure:
1. Raise the litter to the full up position. Unplug the stretcher power cord from the wall socket.
NOTE
If the hydraulic system is completely disabled, manually lift up on the litter to raise the jack actuator.
2. Remove the four Phillips head screws securing the base hood to the base frame. Lift the hood and secure
it to the litter using string or bungee cords. Use caution when lifting the hood so none of the wires leading
to the litter are pulled loose.
3. Locate the black pressure hose leading from the top of the jack casting to the head of the pump. Using
a 9/16”open end wrench, remove the hose from the 90_fitting. Before removing the hose from the jack
base, pack a paper towel or rag around the fitting to soak up the hydraulic oil that will run out of the hose.
Using the modified flair nut wrench, loosen the hose fitting and remove the hose.
4. To install the new hose, pass it behind the jack brace and thread it onto the jack base fitting.
CAUTION
Do not over–tighten the fitting. Thread the brass nut by hand and tighten approximately 60_or one flat of
the nut.
5. Attach the other end of the hose to the pump and tighten as described above. If the hose is tight or stressed,
it may be necessary to change the angle of the fitting on the pump. Using an 11/16”open end wrench,
loosen the nut against the pump 1/2 turn, reposition the fitting and tighten the nut. Remove the paper towel
or rag used to soak up the hydraulic oil.
6. To replace the hydraulic oil lost when the hose was removed, remove the jack filler plug and add approxi-
mately 1 ounce of Mobil AW–32 hydraulic oil (Stryker part number 1550–570–10). Do not fill to the bottom
of the fill hole because most of the oil is in the actuator cylinder when the litter is raised.
7. After the new hydraulic hose or hoses have been installed, plug the stretcher power cord into a properly
grounded wall receptacle. Cycle the litter up and down approximately 10 times and inspect the hose(s)
and fittings for leaks.
8. Before installing the base hood, inspect all wires and connectors and be sure none has pulled loose. Posi-
tion the hood being sure no wires are hanging out or pinched. Replace the four screws to secure the hood.

Service Information
15
BRAKE ADJUSTMENT