Stryker 721 Maintenance Manual

IMPORTANT File in your

maintenance

records

Transport Stretcher

Model 721

MAINTENANCE MANUAL

For Parts or Technical Assistance 1−800−327−0770 (Option 2)

Table of Contents

Introduction

Specifications 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warning / Caution / Note Definition 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preventative Maintenance

Checklist 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cleaning 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Information

Caster Cover Installation and Removal 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Caster Removal 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Brake Rod Removal 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Side Control Brake Rod Removal 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Release Pedal Adjustment 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Foot End Release Pedal Replacement 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Foot End Release Pedal Rod Removal 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Brake Ring Removal 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fifth Wheel Assembly Removal 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Big Wheel Hubcap Removal 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Litter Top Removal 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Big Wheel Carriage Removal 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Big Wheel Removal 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Big Wheel Cam Gas Spring Dampener Removal 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Side Control Big Wheel Linkage Assembly Removal 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Jack Descent Rate Adjustment 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removal of Excess Air from the Hydraulic System 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Head End Hydraulic Jack Removal 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Foot End Hydraulic Jack Removal 16, 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pneumatic Fowler Adjustment 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transfer Board Counterbalance Adjustment 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Folddown Siderail LatchAdjustment 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Quick Reference Replacement Parts List 19, 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents

Assembly Drawings and Parts Lists

Fifth Wheel Base Assembly 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fifth Wheel Assembly 22, 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Base Assembly with Standard Brakes (Fifth Wheel Base) 24, 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Brake Rod Assembly 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Drive Link Assembly 27, 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Caster Assembly 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Base Assembly with Four−Sided Brakes 30, 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Side Control Brake Rod Assembly 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Brake Rod Assembly 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Base Assembly with Dual Side Hydraulics (Fifth Wheel Base) 34−36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Release Pedal Assembly 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pump Pedal Assembly 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Base Labeling Assembly 39−41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Big Wheel Base Assembly 43−45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Base Assembly with Standard Brakes (Big Wheel Base) 46, 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Drive Link Assembly 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Brake Rod Assembly 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Base Assembly with Dual Side Hydraulics (Big Wheel Base) 50−52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cam Bracket Assembly 54, 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Big Wheel Carriage Assembly 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Side Control Big Wheel Base Assembly 57−59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Side Control Big Wheel Carriage Assembly 60, 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Side Control Big Wheel Linkage Assembly 62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Base Labeling Assembly 63, 64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Variable Descent Hydraulic Jack Option 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Constant Descent Hydraulic Jack Option 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Litter Assembly 67−69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Siderail Assembly 70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual Fowler Assembly 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pneumatic Fowler Assembly 72−74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transfer System Assembly 75−80. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents

Assembly Drawings and Parts Lists (Continued)

Removable I.V. Pole Assembly 81. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tethered I.V. Pole Assembly 82, 83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−Stage I.V. Assembly 84−86. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−Stage I.V. Assembly 87−89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C−Spine Cassette Holder Assembly 90−92. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Defibrillator Tray Assembly 93. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Foot Extension/Defibrillator Tray Assembly 94. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Foot Board 95. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

O2 Bottle Holder 95,96. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mattresses and Siderail Pads 97, 98. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warranty

Obtaining Parts and Service 99. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Contract Coverage 99. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Return Authorization 100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Freight Damage Claims 100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction

INTRODUCTION

This manual is designed to assist you with the maintenance of the Model 721 Advanced Transport Stretcher. Read it thoroughly before using the equipment or beginning any maintenance on it.

SPECIFICATIONS

Maximum Weight Capacity 500 pounds Overall Stretcher Length \ Width 83” / 30” Minimum \ Maximum Bed Height 21.5” / 36” Fowler Angle 0_ to 90_ Trendelenburg \ Reverse Trendelenburg +18_ to −18_

Stryker reserves the right to change specifications without notice.

WARNING / CAUTION / NOTE DEFINITION

The words WARNING, CAUTION and NOTE carry special meanings and should be carefully reviewed.

WARNING

Alerts the reader about a situation, which if not avoided, could result in death or serious injury. It may also describe potential serious adverse reactions and safety hazards.

CAUTION

Alerts the reader of a potentially hazardous situation, which if not avoided, may result in minor or moderate injury to the user or patient or damage to the equipment or other property. This includes special care necessary for the safe and effective use of the device and the care necessary to avoid damage to a device that may occur as a result of use or misuse.

NOTE

This provides special information to make maintenance easier or important instructions clearer.

Preventative Maintenance

CHECKLIST

All fasteners secure Siderails move and latch properly Engage the brake pedal and push on the stretcher to ensure all casters lock securely All casters secure and swiveling properly Body restraints working properly I.V. pole intact and operating properly Oxygen bottle holder intact and operating properly Fowler operates and latches properly Trendelenburg/Reverse Trendelenburg operating properly No rips or cracks in mattress cover Transfer boards intact and operating properly Ground chain intact No leaks at hydraulic connections Hydraulic jacks holding properly Hydraulic drop rate set properly Hydraulic oil level sufficient Lubricate where required Accessories and mounting hardware in good condition and working properly

Serial No. ______________ ______________ ______________ ______________ ______________

Completed By:_________________________________ Date:_____________

NOTE

Preventative maintenance should be performed at a minimum of annually. A preventative maintenance program should be established for all Stryker Medical equipment. Preventative maintenance may need to be performed more frequently based on the usage level of the product.

Cleaning

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. (Appropriate 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 because staining may result. The following products have been tested and have been found not to have a harmful effect WHEN USED IN ACCORDANCE WITH MANUFACTURERS RECOMMENDED DILUTION.*

*MANUFACTURER’S

TRADE NAME DISINFECTANT

TYPE 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

MANUFACTURER

RECOMMENDED

DILUTION

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 corrosive 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 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.

Service Information

CASTER COVER INSTALLATION AND REMOVAL

Double Prongs

Looking through the larger of the two side cut−outs, align the cover with the axle nut or bolt head, as shown.

Single Prong

Push down on the opposite side of the cover until the single prong engages the caster horn.

Top View (Cut−Away)

Push on the cover with your palm until the double prongs engage.

To remove the wheel cover, insert a large screwdriver into the cut−out in the side of the wheel cover and into the space between the double prongs. Pry up the cover to disengage the double prongs and push sharply upward to disengage the single prong.

Top View (Cut−Away)

Properly Attached

Cover

Top View (Cut−Away)

CASTER REMOVAL

Required Tools:

9/16” Open End Wrench

1. Remove the caster cover.

2. While keeping pressure on the caster bolt with your index finger, use a 9/16” open end wrench to remove

the nylock hex nut on top of the caster assembly.

3. Using the brake ring, lift up on the base assembly and pull the caster assembly down to remove it.

4. Reverse steps 1−3 to install the new caster.

Service Information

BRAKE ROD REMOVAL Required Tools:

Hammer 7/32” Punch String or Bungee Cords

Fifth Wheel Base

1. Pump the litter up to full height.

2. Lift the base hood and support it from the litter using string or bungee cords.

3. Remove the hex head cap screws connecting the brake rod supports to the base frame.

4. Remove the bolt connecting the drive link assembly to the fifth wheel cam.

5. Remove the rue ring cotter and clevis pin connecting the rod end link to the side control link.

6. Remove the rue ring cotter connecting the drive link assembly to the bearing pivot support on the base

frame (under the brake ring weldment).

7. Remove the three hex washer head screws holding the brake rod assembly to the base frame.

8. Remove the slotted spring pins connecting the butterfly “V” pedals, drive link assemblies and side control

link to the brake rod.

9. Reverse steps 1−8 to reinstall the brake rod. When reinstalling the brake rod supports, torque the hex

head cap screws to 12−15 ft.−lbs.

CAUTION

When reattaching the brake rod assembly to the base frame, set the torque specs no higher than 15 ft.−lbs. or damage could occur to the bolts.

Big Wheel Base

1. Pump the litter up to full height.

2. Lift the base hood and support it from the litter using string or bungee cords.

3. With the brake/steer pedal in the steer position, remove the clevis pin and rue ring cotter connecting the

brake rod to the brake rod drive link at each end of the stretcher.

4. Remove the two clevis pins and rue ring cotters connecting the brake rods to the drive arm at the center

of the base near the cam bracket assembly.

5. Pull on the butterfly “V” pedals to remove the brake rods from the base.

6. Reverse steps 1−5 to reinstall the brake rod.

Service Information

SIDE CONTROL BRAKE ROD REMOVAL Required Tools:

Fifth Wheel Base

1. Pump the litter up to full height.

2. Lift the base hood and support it from the litter using string or bungee cords.

3. Remove the rue ring cotter and clevis pin connecting the rod end link to the side control link.

4. Remove the four bolts holding the brake rod assembly to the base frame and remove the entire assembly.

5. Using a hammer and 7/32” punch, drive the slotted spring pin out of the butterfly “V” pedal on the patient’s

left side and remove the pedal,

6. Using a hammer and 7/32” punch, drive the slotted spring pin out of the hard stop in the center of the

support weldment.

7. Using a hammer and 7/32” punch, drive out the slotted spring pin connecting the side control link to the

side control brake rod on the patient’s right side.

8. Pull on the butterfly “V” pedal on the patient’s right side to remove the side control brake rod from the base.

9. Reverse steps 1−8 to reinstall the brake rod. When reinstalling the assembly, torque the hex head cap

screws to 12−15 ft.−lbs.

CAUTION

When reattaching the brake rod assembly to the base frame, set the torque specs no higher than 15 ft.−lbs. or damage could occur to the bolts.

Hammer 7/32” Punch Needle Nose Pliers String or Bungee Cords

Big Wheel Base

1. Pump the litter up to full height.

2. Lift the base hood and support it from the litter using string or bungee cords.

3. Using a hammer and 7/32” punch, drive the groove pin out of the butterfly “V” pedal on the patient’s left

side and remove the pedal.

4. Using a hammer and 7/32” punch, drive out the groove pin connecting the side control link to the side

control brake rod.

5. Pull on the butterfly “V” pedal on the patient’s right side to remove the side control brake rod from the base.

6. Reverse steps 1−5 to reinstall the brake rod.

RELEASE PEDAL ADJUSTMENT

1. Manually disengage the release pedal swivel (item J on page 35) from the release pedal assembly.

2. To increase the release rod engagement with the release valve, turn the release pedal swivel clockwise

on the threaded release rod.

3. To decrease the release rod engagement with the release valve, turn the release pedal swivel counter-

clockwise on the threaded release rod.

NOTE

If the pedal swivel assembly is threaded too far onto the release rod, the release valve will be partially activated and the jack will drift.

Service Information

FOOT END RELEASE PEDAL REPLACEMENT

Required Tools:

1. Apply the stretcher brakes.

2. Disconnect the release pedal return springs from the foot end release pedals.

3. Remove the rue ring cotters and the clevis pins connecting the foot end release pedals to the mounting

bracket.

4. Rotate the pedals upward.

5. Remove the rue ring cotters connecting the head end and foot end release rods to the foot end release

pedals and remove the pedals.

6. Reverse steps 2−5 to install the new pedals.

Needle Nose Pliers

FOOT END RELEASE PEDAL ROD REMOVAL

Required Tools:

1. Remove the foot end release pedal (see procedure above).

2. Remove the snap in nyliners holding the foot end pedal release rods in the pedal mounting bracket.

3. Unsnap the foot end pedal release rods from the white plastic release rod brackets.

Needle Nose Pliers

4. Dislodge the side control release pedal swivels from the studs on the side control release pedal weldments.

5. Remove the foot end pedal release rods.

6. Reverse steps 1−5 to reinstall the pedal rods.

Service Information

BRAKE RING REMOVAL Required Tools:

9/16” Socket w/Extension 3/8” Drive Ratchet Needle−Nose Pliers String or Bungee Cord

1. Pump the litter up to full height.

2. Lift the base hood and support it from the litter using string or bungee cords.

3. Using needle−nose pliers, unhook the extension springs from the top of the base caster tubes.

4. Remove the plastic caster covers.

5. While putting pressure on the caster carriage bolt, use a 9/16” socket and a 3/8” drive ratchet to remove

the caster nut on both sides of the stretcher.

6. Remove the casters.

7. Remove the brake rod (see procedure).

8. Remove the cotter pin from the clevis pin in the center of the brake ring weldment.

9. Remove the cotter pin from the bearing pivot support.

10. Remove the 3/4” nylock hex nut from the bearing pivot support.

11. Remove the drive link assembly.

12. Pull the brake ring down and out away from the stretcher base frame.

13. Reverse steps 1−12 to reinstall the brake ring.

FIFTH WHEEL ASSEMBLY REMOVAL

Required Tools:

1/2” Socket 3/8” Drive Ratchet

1. Using a 1/2” socket and 3/8” drive ratchet, remove the 1/2” bolt holding the fifth wheel cam drive link and

fifth wheel drive link to the fifth wheel cam.

2. Remove the two 1/2” bolts holding the fifth wheel mounting bracket to the base frame weldment.

3. Remove the fifth wheel assembly.

4. Reverse steps 1 and 2 to reinstall the fifth wheel. When reinstalling the assembly , torque the hex head

cap screws to 12−15 ft.−lbs.

CAUTION

When reattaching the fifth wheel assembly to the base frame, set the torque specs no higher than 15 ft.−lbs. or damage could occur to the bolts.

Service Information

BIG WHEEL HUBCAP REMOVAL Required Tools:

Large Standard Screwdriver

1. Using a large standard screwdriver, pry evenly around the entire edge of the Big Wheel hubcap until it

pops off the mounting studs on the wheel.

CAUTION

Do not attempt to pull off the hubcap after prying up only one side. Damage to the slots on the hubcap or the mounting studs on the wheel could result.

2. To reinstall the hubcap, place it on the wheel, aligning the slots in the hubcap with the mounting studs

on the wheel. Press down evenly on the edges of the hubcap until it snaps into place.

LITTER TOP REMOVAL Required Tools:

1. Using the foot pedal, pump up the litter top to full height.

2. Remove the stretcher mattress

3. Remove the round, black hole plugs from the jack supports at each end of the litter to expose the jack

support tube truss head screws.

4. Using a 1/2” socket, and a 3/8” drive ratchet, remove the truss head screws holding the jack support tubes

to the jack shafts.

1/2” Socket w/Extension 3/8” Drive Ratchet Standard Screwdriver

5. Thread a 7/16−20 fine thread bolt far enough into the top of the jack supports to separate the litter top

from the jack shaft.

6. With the assistance of another person, lift the litter straight up to remove it from the jack shafts and set

it aside.

Service Information

BIG WHEEL CARRIAGE ASSEMBLY REMOVAL

Required Tools:

1/2” Socket 3/8” Drive Ratchet Needle−Nose Pliers

1. Remove the litter top from the stretcher (see page 12).

2. Lift the base hood off the base frame.

3. With the brake/steer pedal in the steer position, remove the clevis pin and rue ring cotter connecting the

brake rod to the brake rod drive link at each end of the stretcher.

4. Remove the two clevis pins and rue ring cotters connecting the brake rods to the drive arm at the center

of the base near the cam bracket assembly.

5. Pull the brake shafts straight out away from the base.

BIG WHEEL REMOVAL

Required Tools:

Large Standard Screwdriver Small Standard Screwdriver String or Bungee Cords

1. Lift the base hood and separate the Velcro holding it to the base frame. Support the hood from the litter

using bungee cords so it is out of the way.

2. Using a large, standard screwdriver, pop off the big wheel cover.

3. Using a small, standard screwdriver, remove the spiral retaining ring from the groove on the Big Wheel axle.

4. Remove the Big Wheel.

5. Reverse steps 1−4 to reinstall the Big Wheel.

6. Remove the four hex washer head screws holding the cam bracket assembly to the base frame and re-

move the cam bracket assembly.

NOTE

On a base with 4−sided brakes, remove the rue ring cotter and clevis pin connecting the side control big wheel linkage assembly to the yoke weldment on the end control brake pad at the foot end of the stretcher.

7. Remove the two hex washer head screws holding the carriage weldment to the base frame and remove

the carriage assembly.

8. Reverse steps 1−7 to reinstall the carriage assembly.

Service Information

BIG WHEEL CAM GAS SPRING DAMPENER REMOVAL

Required Tools:

1/2” Socket 3/8” Drive Ratchet Needle−Nose Pliers

1. Remove the litter top from the stretcher (see page 12).

2. Lift the base hood off the base frame.

3. Remove the two clevis pins and rue ring cotters connecting the brake rods to the drive arm at the center

of the base near the cam bracket assembly.

4. Pull the brake shafts straight out away from the base.

5. Remove the four hex washer head screws holding the cam bracket assembly to the base frame and re-

move the cam bracket assembly.

6. Remove the rue ring cotter from the dampener mounting pin and remove the pin.

7. Lift up on the (patient) left side of the cam bracket and remove the rue ring cotter holding the dampener

to the dampener arm and remove the dampener.

8. Reverse steps 1−7 to install the new dampener.

SIDE CONTROL BIG WHEEL LINKAGE ASSEMBLY REMOVAL

Required Tools:

1/4” Punch Hammer Needle−Nose Pliers String or Bungee Cords

1. Pump the litter up to full height.

2. Lift the base hood and support it from the litter using string or bungee cords.

3. Using a hammer and 1/4” punch, drive out the slotted spring pin connecting the butterfly “V” pedal on the

patient’s right side to the side control wheel axle.

4. Remove the butterfly “V” pedal and set it aside.

5. Using the hammer and 1/4” punch, drive out the slotted spring pin holding the side control Big Wheel link-

age yoke weldment to the side control wheel axle.

6. Pull straight out on the patient’s left side butterfly “V” pedal and remove the side control wheel axle.

7. Using needle−nose pliers, remove the hair pin cotter and washer holding the toggle pivot plate to the side

control Big Wheel carriage assembly.

8. Remove the rue ring cotter and clevis pin connecting the side control Big Wheel linkage rod end link to

the end control brake rod.

9. Remove the side control Big Wheel linkage assembly and set it aside.

10. Reverse steps 1−9 to reinstall the linkage assembly.

Service Information

JACK DESCENT RATE ADJUSTMENT Required Tools:

Screwdriver Bungee Cords (or equivalent)

Adjustment Procedure:

1. Pump the litter up to full height.

2. Lift the base hood, separating the hood from the base frame. Support the hood from the litter using bun-

gee cords so it is out of the way.

3. The descent rate needle valve is located on the base of the jack. Turning the needle valve clockwise,

with a screwdriver, will decrease the rate of descent. Turning it counterclockwise will increase the rate of descent.

NOTE

The larger percentage of a patient’s weight is located in the torso area. Adjust descent rate accordingly.

4. Remove the bungee cords supporting the base hood and secure the hood to the base frame.

NOTE

The jack descent rate is preset at the factory and adjustment is not recommended.

REMOVAL OF EXCESS AIR (VACUUM) FROM THE HYDRAULIC SYSTEM

1. Verify all hydraulic linkages are secure and operating properly.

2. Using the pump pedal, actuate the system several times to force the air through the system. The jack

should now raise properly.

Service Information

HEAD END HYDRAULIC JACK REMOVAL

Required Tools:

1. Remove the litter top from the stretcher (see page 12).

2. Using a 1/2” socket with extension and a 3/8” drive ratchet, remove the two hex head screws holding the

jack base to the stretcher base frame.

3. Remove the two hex head screws holding the jack reservoir clamp to the base frame and remove the

clamps.

4. Lift straight up on the pump connecting rod and disconnect the pump piston from the connecting rod.

5. Disconnect the pump pedal swivel from the release pedal mounting plate.

6. Remove the head end release rod from the release valve assembly.

7. Using a 1/2” socket with extension and a 3/8” drive ratchet, remove the two hex head screws holding the

jack base to the stretcher base frame.

8. Lift out the jack assembly.

9. To reinstall the jack, install the bolts on the jack and reservoir clamp but do not tighten them fully.

10. Reinstall the pump connecting rod and release rod.

11. Depress the pump pedal fully (to the floor). This will properly locate the jack onto the base frame.

12. Tighten the bolts on the jack and reservoir clamp.

13. Pump up the litter and apply weight to verify the jacks hold and do not drift.

1/2” Socket w/Extension 3/8” Drive Ratchet

NOTE

The jack descent rate is preset at the factory and adjustment is not recommended.

FOOT END HYDRAULIC JACK REMOVAL (BASE WITH DUAL CONTROLS)

Required Tools:

1/2” Socket 3/8” Drive Ratchet Pliers

1. Remove the litter top from the stretcher (see page 12).

2. Lift the base hood off the base frame.

3. Remove the two hex washer head screws and washers connecting the pump pedal link to the foot end

pump pedal assembly and pump connecting rod.

4. Remove the foot end release rod from the release valve on the jack assembly by dislodging the release

pedal swivel from the pins on the release pedal weldment.

5. Dislodge the jack pump piston from the pump connecting rod.

6. Remove the two hex washer head screws holding the reservoir clamp.

7. Remove the jack assembly.

8. Reverse steps 1−7 to install the new jack.

NOTE

The jack descent rate is preset at the factory and adjustment is not recommended.

Service Information

FOOT END HYDRAULIC JACK REMOVAL (BIG WHEEL BASE WITH 3−SIDED CONTROLS)

Required Tools:

1/2” Socket 3/8” Drive Ratchet Pliers

1. Remove the litter top from the stretcher (see page 12).

2. Lift the base hood off the base frame.

3. Remove the hair pin cotter and washer connecting the side control Big Wheel linkage toggle pivot plates

to the side control Big Wheel carriage weldment.

4. Remove the rue ring cotter and clevis pin connecting the side control Big Wheel rod end link to the yolk

weldment on the end control brake rod.

5. Remove the Big Wheel carriage assembly (see page 13).

6. Remove the two hex washer head screws and washers connecting the pump pedal link to the foot end

pump pedal assembly and pump connecting rod.

7. Remove the foot end pump pedal return spring.

8. Remove the cotter pin from the center of the foot end pump pedal assembly and slide out the pivot pin.

9. Slide the foot end pump pedal assembly up and over the foot end mounting bracket.

10. Remove the four hex washer head screws fastening the foot end mounting bracket to the base frame and set the bracket aside.

1 1. Remove the foot end release rod from the release valve on the jack assembly by dislodging the release

pedal swivel from the pins on the release pedal weldment.

12. Dislodge the jack pump piston from the pump connecting rod.

13. Remove the two hex washer head screws holding the reservoir clamp.

14. Remove the jack assembly.

15. Reverse steps 1−11 to install the new jack.

NOTE

The jack descent rate is preset at the factory and adjustment is not recommended.

PNEUMATIC FOWLER ADJUSTMENT

Required Tools:

5/32” Hex Allen Wrench 1/2” Open End Wrench

1. Refer to the pneumatic Fowler assembly drawing on page 73 for parts reference.

2. For easier access, raise the Fowler to 75_ or higher.

3. Using a 1/2” open end wrench, loosen the hex nuts (item E) in the actuator arms on the end of the trip bar (item M).

4. To adjust the Fowler, use a 5/32” hex Allen wrench to turn the Allen screws (item J) 1 to 2 turns count- er−clockwise if the Fowler will not move or 1 to 2 turns clockwise if the Fowler will not hold its position.

5. Retighten the hex nuts. Be sure the Fowler travels from flat up to 90_ and down again and holds its position when weight is applied before returning the stretcher to service.

Service Information

TRANSFER BOARD COUNTERBALANCE ADJUSTMENT

Required Tools:

7/16 Open End Wrench

1. Raise the transfer board to the full up position.

2. Unhook the extension spring at the eye bolt.

3. Using a 7/16 open end wrench, loosen the jam nut at the eye bolt.

4. Adjust the eye bolt to the desired position.

5. Tighten the jam nut.

6. Hook the extension spring to the eye bolt.

7. Allow the transfer board to lower on its own.

8. Repeat steps 1−7 until the desired counterbalance is achieved.

FOLDDOWN SIDERAIL LATCH ADJUSTMENT Required Tools:

1/8” Hex Allen Wrench

WARNING

The siderail latches are preset at the factory, and do not normally need adjustment. If adjustment must be done, it is important to follow the procedure below. If adjustment is not done properly, injury to the patient or user could result.

1. Using a 1/8” hex Allen wrench, adjust the hex Allen screw located on the latch assembly opposite the latch. Turning the screw clockwise will DECREASE the amount of ”play” in the latching mechanism. Turning 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 result in damage to the latch and/or injury to the patient or user.

Quick Reference Replacement Parts List

PART NAME PART NUMBER

Cam Replacement Kit, Big Wheel 1040−700−003. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Caster Assembly (1 complete) 0753−010−020. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chartholder 0946−028−100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C−Spine Cassette Holder 1001−070−000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Defibrillator/Equipment Tray 0926−039−000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Defibrillator Tray/Foot Extension 1010−050−100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Foot Board/Chartholder Combination 0926−040−100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Foot Board (1 per package) 0946−029−001. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Foot Board (2 per package) 0946−029−100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hydraulic Jack Assembly, Constant Descent 0753−002−001. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hydraulic Jack Assembly, Variable Descent 0753−002−070. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Instrument/Serving Tray 1052−026−000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I.V. Pole, Standard Removable 0390−025−000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I.V. Pole Kit, Permanent 2−Stage, Head and Foot End 0721−400−001. . . . . . . . . . . . . . . . . . . . . . . . . . . .

I.V. Pole, Permanent 3−Stage, Head End 0721−061−000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I.V. Pole, Permanent 3−Stage, Foot End 0721−062−000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I.V. Pole, Tethered 0721−117−000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mattress, 3” x 24”, Standard 1059−324−140. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mattress, 4” x 24”, Standard 1059−424−140. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mattress, 3” x 26”, Standard 1059−326−140. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mattress, 4” x 26”, Standard 1059−426−140. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mattress, 3” x 24”, Enhanced Comfort 0721−248−106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mattress, 4” x 24”, Enhanced Comfort 0721−247−106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mattress, 3” x 26”, Enhanced Comfort 1001−048−106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mattress, 4” x 26”, Enhanced Comfort 1001−047−106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Oxygen Bottle Holder, Upright 1020−030−000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Quick Reference Replacement Parts List

PART NAME PART NUMBER

Paint, Touch−Up, Gloss Black, Bottle w/Brush 7000−001−322. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Paint, Touch−Up, Gloss Black, Spray Can 7000−001−319. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Paint, Touch−Up, Gray, Bottle w/Brush 7000−001−320. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Paint, Touch−Up, Gray, Spray Can 7000−001−317. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pneumatic Cylinder 1010−031−078. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Restraint Strap, Ankle 0946−043−100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Restraint Straps, Body 0390−019−000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Restraint Strap, Wrist 0946−044−100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Siderail Pad Set 1010−052−000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0753−006−110 Retractable Fifth Wheel Base Assembly

Item Part No. Part Name Qty.

A 0023−288−000 Hex Washer Hd. Screw 2 B(page 22) Fifth Wheel Assembly 1 C 0753−006−148 Cam Bearing 1 D 0023−305−000 Hex Hd. Cap Screw 1

0753−006−130 Fifth Wheel Assembly

Item Part No. Part Name Qty.

A 0003−083−000 Hex Hd. Cap Screw 1 B 0016−035−000 Nylock Hex Nut 1 C 0023−288−000 Hex Washer Hd. Screw 5 D 0025−050−000 Rivet 2 F 0753−006−074 Torsion Spring 1 G 0753−006−075 Torsion Spring 1 H 0753−006−097 Drive Shaft Bearing 2 J 0753−006−106 Dampener 1 K 0753−006−108 Thrust Washer 1 L 0753−006−115 Bearing 2 M 0753−006−120 Bumper Mounting Pin 1 N 0753−006−126 Wheel Bracket 1 P 0753−006−133 Cam Pivot Block 1 R 0753−006−134 Fifth Wheel Mounting Bracket 1 S 0753−006−142 Fifth Wheel Cam 1 T 0753−006−143 Cam Bearing 1 V 0753−006−149 5th Wheel Ramp 1 W 0753−006−152 Spring Spacer 1 X 0753−006−153 Roller Stem 1 Z 0753−006−198 Drive Pin 1 AA 0753−006−223 Drive Shaft 1 AB 0753−006−227 Return Spring Hook 1 AC 0753−006−277 Roller 1 AD 0753−010−045 Hood Standoff 1 AE 1210−001−147 Wheel 1 AG 0753−006−280 Dual Lock 1 AH 0753−006−281 Dual Lock 1 AJ 0011−360−000 Washer 2

Base Assembly w/Standard Brakes (Fifth Wheel Base)

Assembly part number 0753−003−105 (reference only)

Base Assembly w/Standard Brakes (Fifth Wheel Base)

Item Part No. Part Name Qty.

A 0005−039−000 Step Bolt 4 B 0011−262−000 Washer 4 C 0016−035−000 Nylock Hex Nut 4 D 0016−049−000 Nylock Hex Nut 2 E 0023−025−000 Hex Washer Hd. Screw 1 F 0023−288−000 Hex Washer Hd. Screw 3 G 0027−012−000 Hitch Pin 2 H 0027−022−000 Rue Ring Cotter 2 J 0028−037−000 External Retaining Ring 4 K 0038−439−000 Extension Spring 4 L 0081−037−000 Plane Bearing 2 M 0753−001−001 Base Frame 1 N(page 26) Brake Rod Assembly 1 P 0753−003−006 Brake Ring 2 R 0753−003−066 Clevis Pin 2 T 0753−003−079 Caster Tube Brake Pin Guide 4 U 0753−003−121 Brake Cushion 4 V 0753−003−230 Bearing Pivot Support 2 W 0753−010−012 Ground Chain 1 X(page 29) Caster Assembly 4

Brake Rod Assembly

Assembly part number 0753−003−001 (reference only)

Item Part No. Part Name Qty.

A 0026−067−000 Slotted Spring Pin 2 E 0753−003−004 Brake Rod Support 3 F(page 27) Drive Link Assembly 2 G 0753−003−014 Brake Rod 1 H 0753−003−015 Nyliner 3 J 0753−003−099 Butterfly “V” Pedal 2 K (page 28) Drive Link Assembly 1 M 1210−201−335 Red Brake Label 2 N 1210−201−336 Green Steer Label 2 R 0753−003−133 Retainment Spacer 1

0753−003−010 Drive Link Assembly

Item Part No. Part Name Qty.

B 0753−003−011 Brake Rod Drive Link 1 C 0753−003−061 Brake Cam Drive Link 2 D 0753−003−098 Flat Hd. Semi−Tubular Rivet 2 E 0753−003−102 Brake Cam 1

0753−006−135 Drive Link Assembly

Item Part No. Part Name Qty.

A 0753−003−011 Brake Rod Drive Link 1 B 0753−003−098 Semi−Tubular Rivet 1 C 0753−006−122 5th Wheel Cam Drive Link 1 D 0753−006−147 Fifth Wheel Drive Link 1

0753−010−020 8” Caster Assembly

Item Part No. Part Name Qty.

A 0715−002−025 Wheel 1 B 0003−099−000 Hex Hd. Cap Screw 1 C 0753−010−021 Caster Horn w/Bearing 1 D 0016−060−000 Centerlock Nut 1

+ 72 hidden pages

Stryker 721 Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual