Stryker Medical Renaissance Series User manual

IMPORTANT
File in your
maintenance
records
Renaissance Series
2020 Critical Care Bed
MAINTENANCE MANUAL
For Parts or Technical Assistance
1–800–327–0770

Table of Contents
Introduction
Specifications 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning / Caution / Note Definition 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preventative Maintenance 4, 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Information
Mechanical Troubleshooting 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Descent Rate Adjustment 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bleeding Air From The Hydraulic System 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Hydraulic Oil Level 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caster Cover Installation and Removal 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steer Caster Linkage Adjustment 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Valve/Release Pedal/Spring Adjustment 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Manifold Replacement Parts 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Troubleshooting 12,13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Static Discharge Precautions 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Hood Removal And Reinstallation 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frame End Removal – Foot End 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Patient Control Replacement 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litter Control Board Replacement 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litter Control Board Alignment
Fowler Display Alignment 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trendelenburg Display Alignment 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cardiac Chair Fowler Limit Alignment 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scale System Diagnostics And Service
Diagnostic Mode 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying Individual Load Cell Outputs 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing A Load Cell 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Scale CPU 23, 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Board Replacement 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switch Board Replacement 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Junction Board Replacement 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly Drawings and Parts Lists
Base Assembly 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caster/Base Frame Assembly 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caster and Wheel Cover Assembly 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caster Assembly with Steer 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Assembly 32, 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Assembly with Standard Power Cord 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Assembly with Coil Power Cord 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Assembly with 110 V. Outlet Option 36, 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulics Base Assembly 38–41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Assembly, Electrical 42, 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International Base Assembly, Electrical 44, 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hood and Base Assembly 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International Hood and Base Assembly 47–49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litter Assembly, Electrical 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litter Assembly 51–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litter Assembly, Basic Bed 54, 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litter Assembly, Position Option 56, 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litter Assembly, Position Option w/o Head End Keypad 58, 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
Assembly Drawings and Parts Lists (Continued)
Litter Assembly, All Options 60–62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litter Assembly, All Options w/o Head End Keypad 64, 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litter Assembly, Scale Option 66–68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frame End Assembly, Basic 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frame End Assembly, Position Option 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frame End Assembly, All Options 70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frame End Assembly, Scale Option 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frame End Assembly, Procedural (Head End) 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Knee Gatch Assembly 73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calf Section Assembly 74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Knee Gatch Crankscrew Assembly 75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fowler Crankscrew Assembly 76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siderail Assembly, Fold–to–Head 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siderail and Bumper Assembly, Fold–to–Head 78, 79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siderail Assembly, Fold–to–Foot 80. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siderail and Bumper Assembly, Fold–to–Foot 81, 82. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siderail Assembly, Split 83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siderail and Bumper Assembly, Split 84, 85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siderail Assembly, Fold Head, with In–Rail Control Option 86, 87. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siderail and Bumper Assembly, Fold Head, with In–Rail Control Option 88, 89. . . . . . . . . . . . . . . . . . . . . .
Siderail Assembly, Fold Foot, with In–Rail Control Option 90, 91. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siderail and Bumper Assembly, Fold Foot, with In–Rail Control Option 92, 93. . . . . . . . . . . . . . . . . . . . . . .
Split Siderail Assembly, with In–Rail Control Option 94, 95. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siderail and Bumper Assembly, Split, with In–Rail Control Option 96, 97. . . . . . . . . . . . . . . . . . . . . . . . . . .
Gatch/Fowler Control Spindle Assembly 98, 99. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lift/Trend Control Spindle Assembly 100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Patient Control Assembly 101. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Extension/Fowler Assembly 102. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Extension Assembly 103. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Folding I.V. Holder Assembly 104. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Isolated I.V. Socket Assembly, Standard I.V. Pole 105. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Permanent, Isolated I.V. Pole Assembly 106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oxygen Bottle Holder Assembly 107, 108. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defibrillator Tray Assembly 109. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foot Extension/Defibrillator Tray Assembly 110. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foley Bag Holder Assembly 111. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fowler X–Ray Cassette Assembly 112. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fowler X–Ray Cassette Retro–Fit Assembly 113. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Integrated Dynamic Mattress System Assembly 114–116. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dynamic Mattress System Control Spindle Assembly 117. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Integrated Dynamic Mattress Assembly 118. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Infustion Pump Mounting Assembly 119. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty
Obtaining Parts and Service 120. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supplemental Warranty Coverage 120. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Return Authorization 121. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Freight Damage Claims 121. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction
3
INTRODUCTION
This manual is designed to assist you with the maintenance of the 2020 Renaissance Series Critical Care
Bed. Read it thoroughly before using the equipment or beginning any maintenance on it.
SPECIFICATIONS
Maximum Weight Capacity 500 pounds
Overall Bed Length/Width 90”/38”
Minimum/Maximum Bed Height 22.5”/35”–20.5”/33”(low height option)
Knee Gatch Angle 0_to 35_
Fowler Angle 0_to 90_
Trendelenburg/Reverse Trendelenburg –12_to +12_
Weigh System Accuracy (optional equipment) + / –1% of total patient weight
Electrical Requirements 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.

Cleaning
4
Hand wash all surfaces of the stretcher with warm water and mild detergent. Dry thoroughly. DO NOT
STEAM CLEAN, PRESSURE WASH, HOSE OFF OR ULTRASONICALLY CLEAN. Using these methods
of cleaning is not recommended and may void this product’s warranty.
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. Iodophor type disinfectants are not recommended for use be-
cause staining may result. The following products have been tested and have been found not to have a harm-
ful effect on fabrics WHEN USED IN ACCORDANCE WITH MANUFACTURERS RECOMMENDED DILU-
TION.*
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
Phenomysan 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 damage 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 cor-
rosive residue on the surface of the stretcher, possibly causing premature corrosion of critical components.
NOTE
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 cover and foam footrest pad surfaces.
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 which have been exposed to the solution in clear water before returning bed to service.

Preventative Maintenance
5
CHECKLIST
All fasteners secure
Siderails move and lock properly
All casters lock with brake pedal engaged
Foot end steering caster locks with steer engaged (page 9)
Fowler crank operating properly (page 76)
Knee Gatch crank operating properly (page 75)
Lift pedal operating properly (page 6)
Trendelenburg/Reverse Trendelenburg pedals operating properly (page 6)
All functions on head and foot end control panels operating properly –head end is optional equipment–
(page 12)
Patient and/or nurse control functions operating properly (optional equipment)
Weigh system operating properly (page 20)
Safety switches on Knee Gatch and Fowler operating properly
I.V. pole working properly (page 104–106)
O2 bottle holder working properly (page 108)
Restraint strap mounting points secure to litter
Restraint straps working properly (optional equipment)
Head and foot boards secure in frame ends
No cracks or splits in head and foot boards
No rips or cracks in mattress cover
Before continuing the checklist, raise the bed to full up, unplug the power cord from the wall receptacle, and
lift and support the hood assembly.
Power cord not frayed; no loose connections (page 34 or 35)
No cables worn or pinched
All electrical connections tight
All grounds secure to frame
_____ Ground impedance of optional 110 volt outlet not more than 100 milliohms
Ground chain intact and in place
Hydraulic oil level sufficient (page 7)
No leaks at hydraulic connections
No hoses worn, kinked or leaking
Fowler slides securely in tracks and tracks well greased (use MPG Dubois or equivalent)
Lexan securely fitted; no cracks
Brake cam pad not excessively worn

Service Information
6
MECHANICAL TROUBLESHOOTING
PROBLEM/SYMPTOM SOLUTION(S)
Litter will not lower with foot pedals depressed. Adjust valve control linkage rods (page 10).
Litter will not lift when foot pedal pumped. Add hydraulic fluid (page 7).
Bleed air from hydraulic system (page 7).
Change pump pedal cylinder(s).
Litter ”drifts”.Bleed air from hydraulic system (page 7).
Adjust valve control linkage (page 10).
Check for leaking hoses or fittings and replace.
Disconnect hose from affected jack, install cap on
fitting and watch for drift to determine if jack is
faulty.
If jack is O.K., replace check valve #6. If this does
not solve the problem, replace valve #1. If the litter
still drifts, replace valve #5 (see page 11 for valve
references).
Steer wheel doesn’t engage or disengage properly. Adjust steer wheel linkage (page 9).
Replace tension spring.

Service Information
7
HYDRAULIC DESCENT RATE ADJUSTMENT
The descent rate of either end of the bed can be adjusted by turning the needle valves on the manifold assem-
blies located on the base of the bed (see illustration page 11). To access the manifold assemblies, lift and
support the foot end of the hood assembly (see page 15). The needle valve for the head end jack is located
on the left side of the bed if you are standing at the foot (control) end of the bed. The needle valve for the
foot end jack is located on the right side of the bed if you are standing at the foot end. To slow the jack descent
rate, turn the needle valve clockwise. To increase the jack descent rate, turn the needle valve counterclock-
wise.
NOTE
The descent rate was preset at the factory.
BLEEDING AIR FROM THE HYDRAULIC SYSTEM
If the lift motion is jerky or sluggish when the ”BED UP”button is pressed or when the lift pedal is pumped,
and/or the litter is not firm when it is pushed down, there may be air in the hydraulic system. This may have
been caused when the bed was unloaded from the shipping carton if it was lifted out by the litter instead of
by the brake rings.
To bleed air from the hydraulic system, plug the bed into a properly grounded wall receptacle and turn on the
main power switch at the foot end of the bed. Press and Hold the ”BED UP”button on the foot end keypad.
Raise the litter to full up and continue to hold the button to run the pump for an additional 30–45 seconds after
full up is reached. Press the ”BED DOWN”button and lower the litter to full down. Repeat the procedure
2–3 times or until the bed motion is smooth.
Raise the litter to full up using the lift pedal and continue to pump 10–12 times after full up is reached. Lower
the bed using the foot pedals. While continuing to hold the foot pedals down, pump the lift pedal an additional
10–12 times. Repeat the procedure 2–3 times or until the bed motion is smooth and the pedal action is firm.
CHECKING HYDRAULIC OIL LEVEL
1. Lift and support the base hood (see page 15). The hydraulic oil reservoir is located at the foot end of the
bed on the patient’s left.
2. With all cylinders full up, assure the hydraulic oil is at the required level as indicated on the reservoir.
3. If replacement oil is required, use Mobil Aero HFA or Mobil Aerex 903 hydraulic oil (Stryker part number
2020–70–475).
4. Replace the base hood (see page 15).

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
STEER CASTER LINKAGE ADJUSTMENT
Tools Required:
Phillips Head Screwdriver 3/8”Open End Wrench 1/2”Open End Wrench
5/32”Allen Wrench
FE
BC
A
D
E
Adjustment Procedure:
1. Lift up and support base hood (see page 15).
2. Using a 5/32”Allen wrench and 3/8”open end wrench, remove items (D), (E) and (F).
3. Using a 1/2”open end wrench, loosen jam nut (C).
4. Tighten item (A) into item (B) for more lever engagement or away from item (B) for less engagement.
5. To reassemble linkage, reverse steps 2 and 3.
6. Check steering wheel engagement. When properly adjusted, the locking tab should clear the notch in
the steer caster when in the neutral position, and should fully engage when in steer.
7. After proper adjustment is determined, reinstall base hood.

Service Information
10
HYDRAULIC VALVE/RELEASE PEDAL/SPRING ADJUSTMENT
Required Tools:
3/8”Open End Wrench (2) 7/16”Open End Wrench Phillips Screwdriver
Adjustment Procedure:
1. Lift and support base hood (see page 15).
2. Using a 7/16”open end wrench, adjust pedal stop bumper so that top of pedal is parallel with floor. The
pedal should not be able to raise above this point.
3. After pedal stop bumper has been adjusted properly, manual valve should be closed and litter should stay
firm.
4. If litter does not stay firm, adjustments to the linkage will be required.
5. Depress the pedal to the floor and be sure the return spring is completely bottomed out. If it is not, use
both 3/8”open end wrenches to adjust the ball nut at the pedal end of the linkage rod. Retighten the ball
and jam nut.
6. Release the pedal and adjust the ball nut at the manual valve arm so that there is approximately 1/16
inch freeplay between the valve arm and the ball nut. Retighten the ball and jam nut.
7. Reinstall the base hood (see page 15).
Washer

Service Information
11
2020 HYDRAULIC MANIFOLD REPLACEMENT PARTS
6
351
4
2
Item Part No. Part Name
1 2020–170–105 Toggle Valve Assembly
2 2020–170–102 Needle Cartridge Valve Assembly
3 2020–170–106 Coil & Wire Assembly*
4 2020–170–101 Relief Valve Assembly
5 2020–170–107 Cartridge Assembly
6 2020–170–103 Check Valve Assembly
*Attached wiring harness can be used for head and foot end coil.

Service Information
12
ELECTRICAL TROUBLESHOOTING
Before attempting to diagnose an apparent electrical problem, be sure the power cord is plugged into a prop-
erly grounded hospital grade wall receptacle and the power switch at the foot end of the bed is on. If both
these things are done, proceed with diagnosis.
WARNING
After diagnosing the problem, always unplug the power cord from the wall socket before servicing the bed.
PROBLEM/SYMPTOM SOLUTION(S)
Bed doesn’t respond to head end keypad but re-
sponds to all other keypads. Check head end switch board (page 26). Check head end keypad cable.
Replace litter control board (page 17).
Bed doesn’t respond to foot end keypad but re-
sponds to all other keypads. Check foot end switch board (page 26). Check foot end ribbon cable.
Replace litter control board (page 17).
Bed doesn’t respond to patient controls but re-
sponds to other keypads. Check patient control connections. Check patient control & patient control cable.
Replace litter control board (page 17).
Bed doesn’t respond to any commands. All dis-
plays are dead. Check main fuse at junction board. Check power going to litter control & power
boards.
Scale system will not turn on. Check scale system lockout toggle switch.
Check scale system switch board.
Replace scale CPU board (page 23).
Litter won’t lift electrically. Check motor capacitor.
Litter won’t lift electrically. No motor sounds. Check motor (push relay override button at junc-
tion board. If motor runs, it’s OK)
Check motor capacitor connections.
Check motor capacitor.
Check voltage to all boards.
Litter won’t lower electrically. Check fuse #3 at power board.
Check for voltage at solenoids by placing a screw-
driver on the solenoid valve stem. (The stem is
magnetic when the coil is energized). The voltage
at the solenoid terminals on the junction board
must be at least 99 V(AC) to activate coils.
Check control switch board.
Check voltage to all boards.
Motor sounds ”slushy”, lift is not smooth. Bleed air from system (page 7).
If there are air bubbles in suction line, replace mo-
tor.
No positioning functions, power lights still on. Check Fowler and Gatch safety switch tapes for
obstruction or damage.
Fowler and Knee Gatch both move when one
function activated. Unplug each patient control to check for problem. Check litter control board.
Isolated problem(s) with Knee Gatch or Fowler
motor movement. Check fuse #2 at power board. Switch motor connectors at power board to isolate
problem.
Replace power board (page 25).

Service Information
13
ELECTRICAL TROUBLESHOOTING (CONTINUED)
PROBLEM/SYMPTOM SOLUTION(S)
Fowler and/or Knee Gatch doesn’t lower during
Emergency Drop mode. Check position of switches on bellows caps. Check switch capability.
Cardiac Chair doesn’t achieve proper positioning. Check potentiometer adjustment on litter control
board (page 18 & 19).
Emergency Drop delay longer than 3 seconds. Replace litter control board (page 17).
LED position lights not accurate. Check potentiometer positions on litter pots and
litter control board pots (page 18 & 19).
Trendelenburg and/or Reverse Trendelenburg
doesn’t work with bed in lowest position. Check position of switches on bellows caps. Check solenoids.
Power board hums. Replace power board (page 25).
Weigh system shuts off prematurely. Check connections on all weigh cables.
Check individual load cells (page 21)
Replace scale CPU board (page 23).
Weigh system not accurate. Check all load cells for a physical binding on litter
top.
Check individual load cells in diagnostic mode
(page 21).
Check calibration of load cells.
Replace scale CPU board (page 23).

Service Information
14
STATIC DISCHARGE PRECAUTIONS
The electronic circuits in the 2020 are completely protected from static electricity damage only while the bed
is assembled. It is extremely important that all service personnel always use adequate static protection when
servicing the electronic systems of the 2020. Whenever you are touching wires, you should be using static
protection.
Static Protection Equipment
The necessary equipment for proper static protection is:
S1 static wrist strap; 3M part number 2214 or equivalent,
S1 grounding plug; 3M part number 61038 or equivalent,
S1 test lead with a banana plug on one end and an alligator clip on the other; Smith part number
N132B699 or equivalent.
CAUTION
All electronic service parts will be shipped in static shielding bags. Do not open the bags until you have com-
pleted steps 2 and 3 of the following procedure. Do not place unprotected circuit boards on the floor. All circuit
boards to be returned to Stryker Medical should be shipped in the static shielding bags the new boards were
shipped in.
Static Protection Procedure
1. Turn off the main power switch at the foot end of the bed and unplug the power cord from the wall recep-
tacle.
2. Insert the grounding plug into a properly grounded hospital grade wall receptacle. Plug the banana plug
of the test lead into the receptacle on the grounding plug. Connect the alligator clip on the other end of
the test lead to the ground chain of the bed.
3. Place the static control wrist strap on your wrist. Connect the alligator clip at the other end of the wrist
strap cord to the ground chain of the bed.
BED
GROUNDING DIAGRAM

Service Information
15
BASE HOOD REMOVAL AND REINSTALLATION
Required Tools:
Phillips Head Screwdriver 5/32”Ball Driver Bungee Cords or String
Procedure:
1. Raise bed to full up and unplug power cord from wall receptacle.
2. Remove four Phillips head screws holding hood to base assembly and separate Velcro that secures hood
to base tubes.
3. Secure hood to litter using bungee cords, string, etc. so that bed servicing can be easily performed.
4. If more room is needed for service, bellows can be raised above plastic bellows cap. For maximum ac-
cess, disconnect bellows cover switch from its cable. Using a 5/32”Ball driver, remove two Allen bolts
holding bellows cap to jack and remove bellows cap and bellows cover switch.
5. To reinstall hood after bed service has been completed, remove whatever was used in step 3 to secure
hood to litter and place hood back in correct position on base assembly.
6. Reinstall four Phillips head screws that hold hood to base assembly and press down on hood to secure
Velcro holding hood to base tubes.
7. If bellows cover switch was removed, place switch back into bellows cap and reconnect cables. Put bel-
lows and bellows cap onto jack cylinder. Be sure to install caps into ”cutout”groove in jack cylinder. Rein-
stall Allen bolts removed in step four and tighten.
CAUTION
If bellows caps are not installed in the proper location, damage to the caps and switch could occur, or insuffi-
cient activation of the switch may result.
8. Put first pleat at top of bellows around bellows cap and tuck bottom of bellows into base hood.

Service Information
16
FRAME END REMOVAL –FOOT END
If service is required on the electronic portions of the bed, it may be necessary to remove the frame end at
the foot end of the bed.
Required Tools:
Phillips Screwdriver
Removal Procedure:
1. Using the electrical function or the manual crank, move Knee Gatch to full up.
2. Unplug power cord from wall receptacle.
3. Remove foot board from receptacles.
4. Using Phillips head screwdriver, remove two Phillips head screws located on front of frame end on frame
end metal bumper.
5. Slowly lift up on frame end at footboard receptacle area and lay frame end on foot of Knee Gatch
CAUTION
Do not lift frame end quickly, electrical cables are attached to frame end.
6. To replace frame end after service is complete, reverse steps 5–3.
PATIENT CONTROL REPLACEMENT
Required Tools:
Phillips Head Screwdriver 5/32”Allen Wrench 3/8”Open End Wrench
Replacement Procedure:
1. Unplug the power cord from the wall receptacle.
2. Using a Phillips screwdriver, remove access cover(s) located under midsection of litter at the side of the
bed needing the control change.
3. Disconnect the damaged patient control from the patient control cable.
4. Using a 5/32”Allen wrench and a 3/8”open end wrench, remove fasteners and cable clamps used to
attach the patient control to the bed.
5. Connect new patient control to patient control cable being sure to make the proper connection.
6. Attach new patient control to bed using fasteners removed in step 4.
7. Plug the power cord into a properly grounded wall receptacle.
8. Test functions on new patient control.
9. Reinstall access cover(s).

Service Information
17
LITTER CONTROL BOARD REPLACEMENT (P/N 2020–2–670)
Required Tools:
Phillips Head Screwdriver Small Screwdriver
Replacement Procedure:
1. Unplug the bed power cord from the wall receptacle.
2. Properly ground yourself (see page 14 for static discharge precautions).
3. Remove the foot end frame end (see page 16).
4. Disconnect the wires and cables from the litter board being sure to note the position of each of the connec-
tors so the new litter board will be installed properly (see illustration above).
5. Using a small screwdriver, remove the 4 cap screws holding the litter board and remove the litter board
from the spacers on the litter computer plate.
6. Using the cap screws, install the new litter board on the spacers.
7. Reconnect all wires and cables removed in step 4 (see illustration).
8. R8, R9, and R17 must be adjusted if bed has LED position option (see pages 18 and 19).
9. Reinstall the frame end (see page 16).
10. Plug the power cord into a properly grounded wall receptacle. Check all bed operations before returning
the bed to service.

Service Information
18
LITTER CONTROL BOARD ALIGNMENT
Required Tools:
Phillips Head Screwdriver 3/32”Allen Wrench Needle–Nose Pliers
Volt/Ohm Meter Jewelers Screwdriver Thread Loctite
Red Lacquer (Finger Nail Polish)
Fowler Display Alignment Procedure:
NOTE
The following procedure is necessary when replacing the litter control board or when LED alignment is not
correct on Fowler and Trend. LED positioning.
Mechanical Alignment of the Fowler Potentiometer Shaft:
NOTE
The Fowler potentiometer shaft is located under the litter midsection at the patient’s right side.
1. Using a Phillips screwdriver, remove the access panel under the litter midsection.
2. Using a 3/32”Allen wrench, loosen the set screws holding the Fowler pot shaft in the linkage arm.
3. Using the manual crank, lower the Fowler to flat.
4. Using needle–nosed pliers, turn the Fowler pot shaft fully clockwise to its mechanical stop.
5. Remove the foot end frame end (see page 16).
6. Unplug the Fowler pot cable and measure the resistance between the black wire and the green wire. Turn
the Fowler pot so that the resistance is between 55 and 65 ohms; lock down the set screws holding the
Fowler pot shaft and measure the resistance again.
7. Apply thread loctite compound to the set screws.
8. Reinstall the access panel.
Electrical Alignment of the Fowler Potentiometer:
1. Complete the mechanical procedure above.
2. Raise the Fowler to full up.
3. Using a jewelers screwdriver, adjust R8 on the litter control board so that the 90 degree LED on the Fowler
display is lighted. (Turning R8 clockwise will move the lighted LED toward the 0 degree end of the dis-
play). Adjust R8 so that it is positioned in the center of the range that keeps the 90 degree LED lighted.
This point is approximately 5 turns past the point at which the LED first lights.
4. Paint the adjusting screw of R8 with red lacquer.
Trendelenburg Display Alignment Procedure:
Mechanical Alignment of the Trendelenburg Potentiometer Linkage:
NOTE
The Trendelenburg potentiometer linkage is located under the frame end at the patient’s head, left side.
1. Using a 3/32”Allen wrench, loosen the set screws securing the Trend pot shaft in the linkage arm.
2. Using the foot pedal, raise the bed fully. Again, using the foot pedal, put the bed in full reverse Trendelen-
burg.

Service Information
19
LITTER CONTROL BOARD ALIGNMENT (Continued):
Trendelenburg Display Alignment Procedure (Continued):
Mechanical Alignment of the Trendelenburg Potentiometer Linkage (Continued):
1. Using a jewelers screwdriver, turn the Trend pot shaft fully clockwise to its mechanical stop.
2. Remove the foot end frame end (see page 16).
3. Unplug the Trend pot cable and measure the resistance between the black wire and the green wire. Turn
the Trend pot so that the resistance is between 14 and 16 ohms. Lock down the set screws holding the
Trend pot shaft and measure the resistance again.
4. Place approximately 200 pounds on the litter (sit near the head end of the bed). The resistance measure-
ment should not exceed 23 ohms with the weight on the litter. Repeat steps 5 and 6, if necessary.
5. Apply thread lock compound to the set screws.
Electrical Alignment of the Trendelenburg Display:
1. Complete the mechanical procedure above.
2. Using the foot pedal, raise the bed fully. Again, using the foot pedal, put the bed into full Trendelenburg.
3. Using a jewelers screwdriver, adjust R9 on the litter control board so that the +12 degree LED on the
Trend display is lighted. (Turning R9 clockwise will move the lighted LED towards the –12 degree end
of the display). Adjust R9 so that is positioned in the center of the range that keeps the +12 degree LED
lighted. This point is approximately 3 turns past the point at which the +12 degree LED first lights.
4. Paint the adjusting screw of R9 with red lacquer.
Cardiac Chair Fowler Limit Alignment Procedure:
Mechanical Alignment:
1. Complete the Fowler pot mechanical alignment procedure.
2. Raise the bed fully with the litter level. Raise the Fowler to 90 degrees using an inclinometer or a protrac-
tor to achieve the correct angle.
Electrical Alignment:
1. Complete the mechanical procedure above.
2. Remove the foot end frame end (see page 16).
3. Using a jewelers screwdriver, adjust R17 on the litter control board so LED 1 on the control board switches
from brightly lighted to dim. Adjust R17 so it is positioned in the center of the range of adjustment that
keeps the LED dim. This point is approximately 1 1/2 turns past the point at which the LED first goes
dim.
4. When properly adjusted, the Fowler should stop between 40 degrees and 50 degrees in cardiac chair.
Test with the Fowler starting at 0 degrees and again with the Fowler at 90 degrees. Turning R17 clockwise
one turn will raise the Fowler stopping point approximately 3 degrees.
5. Paint the adjusting screw of R17 with red lacquer.
6. Reinstall the foot end frame end.