Model 5050 and 5051 Stretcher Chairs Maintenance Manual Rev C June 2001

Table of Contents Introduction Specifications... 4 Warning / Caution / Note Definition... 4 Preventative Maintenance Checklist... 5 Cleaning... 6 Quick Reference Replacement Parts List... 7−9 Service Information Hydraulic Jack Replacement... 10 Jack Pump Piston Replacement... 11, 12 Hydraulic Valve Replacement... 13, 14 Checking Hydraulic Fluid Level... 14 Adjustable Pressure Compensated (P.C.) Valve Replacement... 15 Jack Descent Rate Adjustment... 16 Steerlock Spring Replacement... 16 Brake/Steer Pedal Replacement... 17 Caster Maintenance... 18 Base Lubrication Points... 19 Siderail Replacement... 20 Siderail Adjustment... 21 Stationary Push Bar Replacement... 21 Adjustable Push Bar Replacement... 22 5051 Pneumatic Cylinder Replacement... 23 Pneumatic Fowler Adjustment... 24, 25 5051 Pneumatic Fowler Release Handle Adjustment... 26 Dependent Leg Section Rigid Link Replacement... 27 Foot Rest Pan Replacement... 27 Dependent Leg Section Frame Replacement... 28 Independent Leg Section Cylinder Adjustment... 28 Independent Leg Locking Linkage Adjustment... 29 Independent Leg Section Locking Link Replacement... 30 Independent Leg Section Cable Replacement... 31 Independent Leg Section Handle Adjustment... 32 Mattress Maintenance... 32

Table of Contents Assembly Drawings and Parts Lists Base Assembly... 33−37 Brake Adjuster Assembly... 38 Brake Cam Assembly... 39 Brake Drive Link Assembly... 39 Pump Pedal Assembly... 40 Release Pedal Assembly... 41, 42 Brake Actuator Assembly... 43, 44 Caster Assembly... 45−47 Jack Assembly... 48−50 Hydraulic Jack Tool Assembly... 51 Base Hood Labels and Graphics... 52−54 Midsection Assembly... 55 Fowler Assembly... 56−61 Head Piece Assembly... 62−65 Dependent Leg/Stationary Foot Section Assembly... 66−68 Dependent Leg/Adjustable Foot Section Assembly... 69−71 Independent Leg/Stationary Foot Assembly... 72−75 Independent Leg/Adjustable Foot Section Assembly... 76−79 Independent Leg Section Locking Link... 80 Non−Transfer Siderail Assembly... 81 Transfer Siderail Assembly... 82 Board Support Assembly... 83 Adjustable Push Bar Assembly... 84 Stationary Push Bar Assembly... 85 Removable IV Pole Assembly... 86 Tethered IV Pole Assembly... 87−89 Heel Stirrup Assembly... 90 Heel Stirrup Bracket Assembly... 91

Table of Contents Assembly Drawings and Parts Lists (Continued) Wrist Rest Assembly... 92 Wrist Rest Assembly, Temporal... 93 Wrist Rest Accessory Bracket Assembly... 94 Leg Support Assembly... 95 Leg Support Bracket Assembly... 96 Surgery Accessory Rail Assembly... 97 Arm Board Assembly... 98, 99 Optional Drape Support Assembly... 100 Limited Warranty Obtaining Parts and Service... 101 Supplemental Warranty Coverage... 101 Return Authorization... 102 Freight Damage Claims... 102

Introduction INTRODUCTION This manual is designed to assist you with the maintenance of the model 5050 and model 5051 Stretcher Chair. Read it thoroughly before using the equipment or beginning any maintenance on it.

SPECIFICATIONS Maximum Weight Capacity

400 pounds

Overall Stretcher Length/Width

76”/30”

Patient Surface Length/Width (Mattress)

74”/24”

Minimum/Maximum Stretcher Height (Floor to Litter Surface)

22”/33.5”

Foot Section Articulation

0_ to 80_

Fowler Articulation

0_ to 90_

Trendelenburg/Reverse Trendelenburg Articulation

+18_/−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.

Safe Working Load

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Preventative Maintenance

CHECKLIST All fasteners secure (reference all assembly prints) Siderails move and latch properly − securing pins and screws are intact Transfer surface (optional equipment) intact and working properly Engage brake pedal and push on the stretcher to ensure all casters lock securely All casters secure and swiveling properly Steer function working properly Fowler/leg articulation operating properly − adjust as necessary Trendelenburg/Reverse Trendelenburg operating properly Optional articulating head piece locking and releasing properly No leaks at hydraulic connections Hydraulic jacks holding properly Hydraulic drop rate set properly. (see page 16 for procedure) Hydraulic oil level sufficient (see page 14 for procedure) Oxygen bottle holder intact No rips or cracks in mattress cover or restraint straps − all Velcro intact and in good condition Head and foot section bumpers intact and in good condition Lubricate where required, including the brake adjuster assembly and brake cam and the independent foot section mechanisms (optional equipment) 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.

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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. Suggested cleaners for stretcher surfaces: Quaternary Cleaners (active ingredient − ammonium chloride) Phenolic Cleaners (active ingredient − o−phenylphenol) Chlorinated Bleach Solution (5.25% − less than 1 part bleach to 100 parts water) Avoid oversaturation and ensure the product does not stay wet longer than the chemical manufacturer’s guidelines for proper disinfecting. CAUTION SOME CLEANING PRODUCTS ARE CORROSIVE IN NATURE AND MAY CAUSE DAMAGE TO THE PRODUCT IF USED IMPROPERLY. If the products described above are used to clean Stryker patient care equipment, measures must be taken to insure the beds are wiped with clean water and thoroughly dried following cleaning. Failure to properly rinse and dry the beds will leave a corrosive residue on the surface of the bed, 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. For mattress cleaning instructions, please see the tag on the mattress, or contact the mattress manufacturer. 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.

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5050 Quick Reference Replacement Parts List

PART NAME

PART NUMBER

Arm Board Support Assembly... 5050−26−80 Brake Adjuster Assembly... 715−1−150 Brake Adjuster Service Tool... 715−700−150 Foot Rest Pad... 5050−40−5 Heel Stirrup Assembly... 5050−51 Heel Stirrup Mounting Hardware... 5050−252 I.V. Caddy... 1050−1−100 I.V. Caddy Tool Kit... 1050−10 I.V. Pole, Standard... 390−25 I.V. Pole, Tethered... 5050−75 I.V. Holder, Tethered... 1001−87−18 Jack Assembly... 5050−400−1 Jack Hydraulic Oil, Mobil Aero HFA − 1 Quart... 2020−70−475 Jack Pump Spring Compression Tool... 5050−500−70 Jack Replacement Pump Piston... 715−100−325 Jack Replacement Release Valve... 2025−700−26 Leg Support Assembly... 960−32 Leg Support Mounting Hardware... 5050−234 Mattress, 2”, Enhanced Comfort... 5050−141−10 Mattress, 3”, Enhanced Comfort... 5050−143−10 Mattress, 3”, Ultra Comfort... 5050−243−10 Paint, Touch−Up, Gloss Black, Bottle w/Brush... 7000−1−322 Paint, Touch−Up, Gloss Black, Spray Can... 7000−1−319 Paint, Touch−Up, Gray, Bottle w/Brush... 7000−1−320 Paint, Touch−Up, Gray, Spray Can... 7000−1−317 Pneumatic Cylinder, Fowler... 360−31−77 Pneumatic Cylinder, Foot Section... 1010−31−77 Restraint Strap, Ankle... 946−43 Restraint Strap, Chest... 1010−59 Restraint Strap, Body... 390−19 Restraint Strap, Wrist... 946−44 Restraint Strap Full Package... 1010−77 Wrist Rest Assembly, Superior... 1068−250 Wrist Rest Assembly, Temporal... 1068−251 Wrist Rest Mounting Bracket... 5050−50 Siderail Arm Pad Assembly... 5050−26−50

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5051 Quick Reference Replacement Parts List

PART NAME

PART NUMBER

Arm Board... 1068−55−10 Arm Board (with Direct Clamp)... 1068−56−110 Arm Board Clamp... 1068−54−10 Arm Board Support Assembly... 5050−26−80 Brake Adjuster Assembly... 715−1−150 Brake Adjuster Service Tool... 715−700−150 Foot Rest Pad, 2”... 5050−140−5 Foot Rest Pad, 3”, Ultra Comfort... 5051−43−40 Head Pad, 2” Concave... 1069−81 Head Pad, 3” Concave... 1069−181 Head Pad, 1” Flat... 1069−78 Head Pad, 2” Flat... 1069−179 Head Pad, 3” Flat... 1069−180 Head Pad. 3” Inflatable... 1069−182−10 Head Pad. 3” Inflatable, Ultra−Comfort... 1069−82 Head Pad, Inflatable, Latex Bulb Only... 1066−82−20 Heel Stirrup Assembly... 5050−51 Heel Stirrup Mounting Hardware... 5050−252 I.V. Caddy... 1050−1−100 I.V. Caddy Tool Kit... 1050−10 I.V. Pole, Standard... 390−25 I.V. Pole, Tethered... 5050−75 I.V. Holder, Tethered... 1001−87−18 Leg Support Assembly... 960−32 Leg Support Mounting Hardware... 5050−234 Jack Assembly... 5050−400−1 Jack Hydraulic Oil, Mobil Aero HFA − 1 Quart... 2020−70−475 Jack Pump Spring Compression Tool... 5050−500−70 Jack Replacement Pump Piston... 715−100−325 Jack Replacement Release Valve... 715−270−100 Mattress, 2”... 5051−43−20 Mattress, 3”, Enhanced Comfort... 5051−43−30 Mattress, 3”, Ultra Comfort... 5051−43−50

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5051 Quick Reference Replacement Parts List

PART NAME

PART NUMBER

Paint, Touch−Up, Gloss Black, Bottle w/Brush... 7000−1−322 Paint, Touch−Up, Gloss Black, Spray Can... 7000−1−319 Paint, Touch−Up, Gray, Bottle w/Brush... 7000−1−320 Paint, Touch−Up, Gray, Spray Can... 7000−1−317 Pneumatic Cylinder, Fowler... 360−31−77 Pneumatic Cylinder, Foot Section... 1010−31−77 Restraint Strap, Ankle... 946−43 Restraint Strap, Chest... 1010−59 Restraint Strap, Body... 390−19 Restraint Strap, Wrist... 946−44 Restraint Strap Full Package... 1010−77 Siderail Arm Pad Assembly... 5050−26−50 Surgery Accessory Rail Assembly... 5051−531−10 Wrist Rest Assembly, Superior... 1068−250 Wrist Rest Assembly, Temporal... 1068−251 Wrist Rest Mounting Bracket... 5050−50

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Service Information HYDRAULIC JACK REPLACEMENT Required Tools: 3/8” Wrench Straight Screwdriver 3” Extension

Needle−Nosed Pliers 1/2” Wrench (2) 7/16” Wrenches

Allen Wrench 1/2’ Socket

Replacement Procedure: NOTE It requires two people to safely perform this procedure. 1. Apply the Stretcher Chair brakes. Raise the litter to full up. Raise the Fowler and the siderails. 2. Use a 3/8” wrench to remove the bolts in the litter support tubes above the black bellows on both ends of the litter. 3. With the assistance of another person, lift the litter off the base and set it aside, taking care not to damage the leg section linkages and other litter components. 4. Push down on the jack actuator to put the jack in the full down position. 5. Lift off the plastic base hood, separating the Velcro holding it to the base frame. 6. Using an Allen wrench and a 1/2” wrench, remove the nylon lock nut underneath the pump piston. 7. Using a straight screwdriver and pump spring compression tool (p/n 5050−500−70) compress the pump spring and pry the pump link and socket head fastener out of the pump cylinder. CAUTION Do not let the pump piston come out of the jack or damage may occur. 8. Using a 1/2” socket and a 1/2” wrench, remove the four bolts, washers, and nuts holding the jack support clamps to the base frame. 9. Using the 1/2” socket and 1/2” wrench, remove the four bolts, washers, and nuts holding the jack base to the base frame. (Using a 3” extension may be required). Remove the jack from the base frame. 10. Reverse steps 8 and 9 to install the replacement jack. 11. For the head end jack only − using two 7/16” wrenches, remove the fasteners for the brake drive link and move it to the side. 12. With the pump pedal in the full−up position, insert the pump link into the pump pivot assembly and align the hole in the end of the pump link to the hole in the pump piston on the jack. Pull out or push in on the pump piston as required. Remove the pump link. 13. Install the spring guide and grease before installing the jack spring onto the pump piston. 14. Place the spring collar onto the end of the compression spring. 15. Put the spring compression tool on the 1”x1” tubing with the handle to the right with the spring collar in the recessed “U”−shaped plate. Push the entire assembly forward until it stops and tighten the knob. 16. Align the pump piston to the center of the cut−out in the “U”−shaped plate to prevent pushing the pump piston in while compressing the jack spring. Continue to check the alignment while compressing the spring. 17. Pull back on the fixture handle to compress the jack spring. While pulling, use your left hand to push the upright with the plastic sleeve to the right. This prevents binding of the dowel pin in the slot of the fixture. Compress the jack spring until the fixture bottoms out. 18. While keeping pressure on the jack spring, use your left hand to place the pump link into the pump pivot assembly and align the other end of the link to the hole in the pump piston.

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Service Information HYDRAULIC JACK REPLACEMENT (CONTINUED) 19. With pressure still on the jack spring, install the socket head cap screw through both the pump link and the pump piston. 20. Partially thread the locking nut on the cap screw before taking the jack fixture off the 1”x1” tube. 21. Tighten the locking nut on the socket head cap screw. 22. Pump the jack fully up and lower it again to ensure proper operation. 23. Reinstall the base hood, securing it to the Velcro. 24. With the assistance of another person, place the litter back on the base. 25. Use a 3/8” wrench to install the bolts in the litter support tubes above the black bellows on both ends of the litter. 26. Pump the litter fully up and down to verify proper operation before returning the Stretcher Chair to service.

JACK PUMP PISTON REPLACEMENT Replacement pump piston part # − 715−100−325

Jack tool part # − 5050−500−70

Required Tools: 3/8” Wrench Straight Screwdriver

Needle−Nosed Pliers 1/2” Wrench

Allen Wrench 7/8” Wrench

Replacement Procedure: NOTE It requires two people to safely perform this procedure. 1. Apply the Stretcher Chair brakes. Raise the litter to full up. Raise the Fowler and the siderails. 2. Use a 3/8” wrench to remove the bolts in the litter support tubes above the black bellows on both ends of the litter. 3. With the assistance of another person, lift the litter off the base and set it aside, taking care not to damage the leg section linkages and other litter components. 4. Push down on the jack actuator to put the jack in the full down position. 5. Lift off the plastic base hood, separating the Velcro holding it to the base frame. 6. Using an Allen wrench, and a 1/2” wrench, remove the nylon lock nut underneath the pump piston. 7. Using a straight screwdriver and pump spring compression tool (p/n 5050−500−70), compress the pump spring and pry the pump link and socket head fastener out of the pump cylinder. 8. Remove the jack spring. 9. Using needle−nosed pliers, remove the spring holder. 10. Using a 7/8” wrench, remove the pump piston assembly and the bottom seal and discard the seal. There may be some slight hydraulic fluid leakage. 11. Install the replacement seal into the jack base. 12. Install the replacement pump piston assembly and tighten fully with a 7/8” wrench. 13. For head end jack only − using two 7/16” wrenches, remove the fasteners for the brake drive link and move it to the side.

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Service Information

JACK PUMP PISTON REPLACEMENT (CONTINUED) 14. With the pump pedal in the full−up position, insert the pump link into the pump pivot assembly and align the hole in the end of the pump link to the hole in the pump piston on the jack. Pull out or push in on the pump piston as required. Remove the pump link. 15. Install the spring guide and grease before installing the jack spring onto the pump piston. 16. Place the spring collar onto the end of the compression spring. 17. Install the spring compression tool onto the 1”x1” tubing with the handle to the right and capture the spring collar in the recessed “U”−shaped plate. Push the entire assembly forward until it stops. Tighten the knob. 18. Align the pump piston to the center of the cut−out in the “U”−shaped plate to prevent pushing the pump piston in while compressing the jack spring. Continue to check the alignment while compressing the spring. 19. Pull back on the fixture handle to compress the jack spring. While pulling, use your left hand to push the upright, with the plastic sleeve, to the right. This prevents binding of the dowel pin in the slot of the fixture. Compress the jack spring until the fixture bottoms out. 20. While keeping pressure on the jack spring, use your left hand to place the pump link into the pump pivot assembly and align the other end of the link to the hole in the pump piston. 21. With pressure still on the jack spring, install the socket head cap screw through both the pump link and the pump piston. 22. Partially thread the locking nut on the cap screw before taking the jack fixture off the 1”x1” tube. 23. Tighten the locking nut on the socket head cap screw. 24. Pump the jack fully up and lower it again to ensure proper operation. 25. Reinstall the base hood, securing it to the Velcro. 26. With the assistance of another person, place the litter back on the base. 27. Use a 3/8” wrench to install the bolts in the litter support tubes above the black bellows on both ends of the litter. 28. Pump the litter fully up and lower it again to ensure proper operation before returning the Stretcher Chair to service.

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Service Information HYDRAULIC VALVE REPLACEMENT Required Tools: 3/8” Open End Wrench 1/2” Diameter Rod

Stiff Wire (with bent, pointed end) Torque Wrench (with Ft. Lbs. adjust.)

Small Needle Nose Pliers

Replacement of the Poppet Valve: WARNING To avoid personal injury or damage to the stretcher, remove the litter and the base hood with the assistance of another person 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 (D) and the seal (L). 2. Remove the compression spring (C). 3. Using a small needle nose pliers, remove the poppet (F). 4. Install the new poppet (F). 5. Install the compression spring (C). 6. Install the seal (L) and the base plug (D) and tighten to 10 foot−pounds torque. 7. Pump up the jack to the maximum height. Apply weight and ensure the jack holds its position and there are no hydraulic leaks before replacing the base hood and the litter.

ITEM

PART NO.

PART NAME

A B C D E F H J K L M N

45−966 45−967 390−2−134 715−1−301 715−1−309 715−1−341 715−100−325 926−20−153 926−20−154 926−20−156 2025−700−26 5050−70−50

O−Ring O−Ring Conical Comp. Spring Base Plug Valve Plug Poppet Pump Replacement Ass’y Check Valve Seal Seal Valve Assembly P.C. Valve

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Service Information HYDRAULIC VALVE REPLACEMENT (CONTINUED) Replacement of the Check Valve: NOTE It requires two people to safely perform this procedure. WARNING To avoid personal injury or damage to the stretcher, always 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 the head end and the foot end jack support tubes. Remove the litter top and set it aside. 2. Lift off the plastic base hood, separating the Velcro holding it to the base frame. 3. Lower the jack to the full down position. The actuator must be manually lowered while the appropriate release pedal is depressed. 4. Remove the base plug (D) and the seal (L). 5. Remove the valve plug (E). 6. Using a stiff wire with a bent, pointed end, remove the check valve (J) and the seal (K). 7. Install the seal (K) flat to the bottom of its hole with a 1/2” diameter rod. 8. Install the new check valve (J) with the beveled end up (as shown in the illustration). 9. Install the valve plug (E) and tighten to 10 foot−pounds torque. 10. Install the seal (L) with the base plug (D) and tighten to 10 foot−pounds torque. 11. Pump up the jack to the maximum height. Apply weight and ensure the jack holds its position and there are no hydraulic leaks before replacing the base hood and the litter.

CHECKING HYDRAULIC FLUID LEVEL Required Tools: 3/8 Open End Wrench

3/4 Open End Wrench

Procedure: 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, taking care not to damage the leg section linkages and other litter components. 2. Lift off the plastic base hood, separating the Velcro holding it to the base frame. 3. Be sure there are no hydraulic leaks. If there are, jack replacement will be necessary. Lower the jack to the full down position. 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. 4. 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. 5. Replace the base hood and the litter.

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Service Information

ADJUSTABLE PRESSURE COMPENSATED (P.C.) VALVE REPLACEMENT WARNING To avoid personal injury or damage to the stretcher, always 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.

Required Tools: 3/8” Wrench

13/16” Wrench

Replacement Procedure: NOTE It requires two people to safely perform this procedure. 1. Apply the Stretcher Chair brakes. Raise the litter to full up. Raise the Fowler and the siderails. 2. Use a 3/8” wrench to remove the bolts in the litter support tubes above the black bellows on both ends of the litter. 3. With the assistance of another person, lift the litter off the base and set it aside, taking care not to damage the leg section linkages and other litter components. 4. Push down on the jack actuator to put the jack in the full down position. 5. Lift off the plastic base hood, separating the Velcro holding it to the base frame. 6. Using a 13/16” wrench, remove the adjustable P.C. valve (see page 13 for part identification). 7. Check for any contaminants in the valve as well as the jack base. 8. Install a new P.C. valve. Moisten the O−ring seal with a little hydraulic fluid to ensure a good seal. 9. Tighten the valve manually and then an additional 1/8−1/4 turn with 13/16” wrench. Do not over −tighten or damage may occur to the O−ring seal. 10. Pump up the jack to maximum height and press the release pedal to lower it to check the jack operation. 11. Check for any hydraulic fluid leaks before replacing the base hood and the litter.

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Service Information

JACK DESCENT RATE ADJUSTMENT Required Tools: Bungee Cords

Adjustment Procedure: 1. Pump the litter up to full height 2. Lift the base hood, separating the Velcro holding it to the base frame. 3. The adjustable descent valve is located on the base of the jack and has a blue knob on the end. To adjust, loosen the silver locking ring by turning it counterclockwise. Turning the blue knob clockwise will increase the rate of litter descent. Turning it counterclockwise will decrease the rate of descent. 4. Adjust the valve so that the jack at the foot end of the Stretcher Chair will descend slightly faster than the jack at the head end. 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 3−7 seconds faster than the head. It is recommended that the foot drops faster to avoid patient disorientation.

STEERLOCK SPRING REPLACEMENT Required Tools: 3/32” Hex Allen Wrench Bungee Cords

11/32” Wrench Pliers

Replacement Procedure: 1. Raise the litter to full−up. 2. Lift up the plastic base hood, separating the Velcro holding it to the base frame and, using the bungee cords, suspend it from the litter. 3. Using a 3/32” hex Allen wrench and a 11/32” wrench, remove the 8−32 fastener, washer and nut holding the steerlock arm onto the base. 4. Holding onto the extension spring, twist the steerlock arm back and forth to remove it from the spring. 5. Using pliers, remove the spring from the steerlock weldment over the caster and discard it. 6. Grease the end of the steerlock weldment and install the replacement extension spring onto it until the spring reaches the bend in the steerlock weldment arm. 7. Grease the end of the steerlock arm and, while holding the extension spring, insert the steerlock arm into the spring until it reaches the bend in the steerlock arm (rotating the steerlock arm while pushing on it may help). 8. Reconnect the steerlock arm to the base with the 8−32 fastener, washer, and nylon lock nut and tighten. 9. Actuate the brake steer pedal and ensure the steerlock latch engages into the notch in the locking caster. 10. Remove the bungee cords supporting the base hood and secure the hood to the base frame.

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Service Information

BRAKE/STEER PEDAL REPLACEMENT Required Tools: Two (2) 7/16” Wrenches Hammer

3/16” Drive Pin 3/8” Box End Wrench

Loctite 409 or Equivalent Bungee Cords

Replacement Procedure: NOTE It may require two people to safely perform this procedure. 1. Apply the brakes, if possible, with the remaining good brake/steer pedal. If this is not possible, have someone assist you with the following: Using a large wrench or pry tool, push down on the brake bar (compressing the spring) and manually move the molded plastic brake cam over to the brake position at both ends of the base. 2. Raise the litter to full up. Raise the Fowler and the siderails. 3. Suspend the base hood from the litter and out of the way with bungee cords. Or, for better access, remove the litter by following the next 3 steps. 4. Using a 3/8” wrench, remove the bolt in the litter support tube above the black bellows on both ends. 5. With the assistance of another person, lift off the stretcher litter and set it aside, taking care not to damage the leg section linkages, or other litter components. 6. Lift off the plastic base hood, separating the Velcro holding it to the base frame. 7. Using the 7/16” wrenches, remove the bolt, nut and washers holding the square brake drive link assembly on the brake actuator on both sides of the base. 8. While lifting one end (head or foot) of the base, rotate the brake/steer pedal so its bottom is facing up. 9. Use a hammer and 3/16” drive pin to remove the groove pin (part number 26−261) from the plastic brake/ steer pedal (part number 715−201−201). Be sure that you are driving the pin out from the bottom of the pedal towards the top of the pedal. 10. Remove the brake/steer pedal from the brake rod (use of a hammer may be required). 11. Repeat step 8 so the brake actuators are upright. 12. Fit the replacement brake/steer pedal onto the brake rod. 13. Align the holes in the brake/steer pedal with the holes in the brake rod and use a hammer to install the replacement groove pin. Drive the pin in from the top of the pedal until it is flush to the top of the pedal. 14. Reverse step 7 to reattach both brake drive link assemblies to the base (When the pedal is reconnected it will already be in the brake position). 15. Actuate the brake/steer pedal to ensure the unit functions fully in brake, neutral and steer modes. 16. Reinstall the base hood, securing it to the Velcro. 17. With the assistance of another person, place the litter back on the base (if necessary). 18. Use a 3/8” wrench to install the bolts in the litter support tubes above the black bellows on both ends of the litter.

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Service Information

CASTER MAINTENANCE Required Tools: 5/8” Wrench 11/16” Wrench

MAINTENANCE PROCEDURE

1. Using the 5/8” wrench and the 11/16” wrench, remove the centerlock nut (item A) from the through bolt (item B) for the caster wheel. 2. Support the corner of the Stretcher Chair where the wheel is being removed and remove the through bolt (item B) and the molded wheel (item C) . 3. Clean the through bolt, molded wheel, and the inside of the caster horn (item D) removing any dirt and debris. Ensure the bearings in the molded wheel spin freely and easily. 4. Replace the molded wheel and the through bolt. 5. Replace the centerlock nut on the through bolt and use the 5/8” and 11/16” wrenches to tighten it securely.

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Service Information BASE LUBRICATION POINTS

Grease areas as shown.

Grease two places.

BRAKE ADJUSTMENT

Required Tools: 3/32” Hex Allen Wrench Pry Bar Thread ”Locktite”

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