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Stryker The Go BED FL17E Maintenance Manual Download Page 23

 

Troubleshooting 

Chapter 3 

 

23 

PROBLEM 

POSSIBLE CAUSES 

RECOMMENDED ACTION 

 

Nurse call switch defective. 

Replace nurse call switch 
(see section 4.5). 

 

Nurse call switch cable 
defective 

Replace nurse call cable 
(see section 4.5) 

Safety side-rails jam, move 
with difficulty, do not latch in 
high position or latch with 
difficulty. 

Side-rail mechanisms poorly 
greased and/or mechanism 
parts loosened. 
 

Apply grease on the side-
rail plungers, plunger 
springs, arm glide rods and 
rail shafts (see  section 2.2, 
"Lubrication"). Check all 
applicable hardware and 
parts alignment. Replace 
parts as needed (see 
section 4.1). 

 

Side-rail parts misaligned 
following a blow. 

Replace side-rail assembly 
(see section 4.1)  

Brake does not engage when 
activated or do not release. 

Fasteners of the brake 
activation mechanism not 
secured or parts misaligned. 

Check all applicable 
linkage, hardware and parts 
alignment. Replace parts 
as needed (see sect. 4.19, 
"Brake/steer pedal…") 

 

One or both casters that are 
part of the locking mechanism 
defective. 

Replace caster (see section 
4.21). 

Steer wheel (5th wheel) does 
not engage when activated or 
does not disengage. 

Fasteners of the 5th wheel 
activation mechanism not 
secured or parts misaligned. 

Check all applicable 
linkage, hardware and parts 
alignment. Replace parts 
as needed (see sect. 4.20). 

 

Swing arm assembly spring 
warped 

Replace the 5th wheel 
swing arm assembly (see 
section 4.20) 

Summary of Contents for The Go BED FL17E

Page 1: ... French in Canada 1 800 327 0770 In United States E mail Canada service bertec strykercorp com December 2000 Manufactured by Stryker Bertec Medical Inc 72 0173 R1 0 Printed in Canada MAINTENANCE MANUAL The GO BED ELECTRIC ACUTE CARE BED Product Number FL17E Product Number for the United States 2500 TM ...

Page 2: ......

Page 3: ... Five Years Time Interval Checklist 14 Lubrication Points Illustrated 15 2 3 PREVENTIVE MAINTENANCE PROGRAM 16 Checklist 16 PC Board Maintenance Program 17 Recommended Spare Parts 18 3 TROUBLESHOOTING 19 3 1 TROUBLESHOOTING GUIDE 19 4 MAINTENANCE PROCEDURES 24 4 1 SIDE RAIL ASSEMBLY REPLACEMENT 24 Foot Side Rail Assembly Replacement 24 Head Side Rail Assembly Replacement 25 4 2 SIDE RAIL REPLACEME...

Page 4: ...acement 46 Head Actuator Replacement 47 Hi Lo Actuator Replacement 48 4 15 ACTUATOR SCREW LUBRICATION PROCEDURE 49 Head and Knee Gatch Actuator Screws 49 Head Actuator Screw Guide 49 Hi Lo Actuator Screws 50 4 16 CPR MECHANISM SPRINGS AND OR DAMPER REPLACEMENT 51 4 17 CPR MICRO SWITCH REPLACEMENT 52 Micro Switch Located Under the Head Section 52 Micro Switch Located Under the Mattress Support 53 4...

Page 5: ...98 4 cm plastic side rails down Overall Weight w o boards and accessories 385 lb 175 kg Patient Sleeping Surface 35 x 80 extendable to 82 and 84 89 cm x 203 cm extendable to 208 cm and 213 cm Minimum Maximum Bed Height 14 to 29 35 5 cm to 74 7 cm Sound Level 58 dBa Fowler Angle 0 to 65 Knee Gatch w o Contour Positioning Knee Gatch w Contour Positioning 0 to 32 0 to 24 Trendelenburg Reverse Trendel...

Page 6: ...hieved only when a hospital grade receptacle is used Possible fire hazard exists when this bed is used with oxygen administering equipment other than nasal mask type or half bed length tent type It is recommended to disconnect the bed in such circumstances When using a half bed length tent type ensure the side rails are outside the oxygen tent and oxygen tent should not extend below the mattress s...

Page 7: ...ance completely check the bed Fluids can have an adverse effect on operational capabilities of any electrical product DO NOT put the bed back into service until it is completely dried and has been thoroughly tested for safe operation Do not steam clean hose off or ultrasonically clean the bed Do not immerse any part of the bed The internal electrical parts may be damaged by exposure to water Hand ...

Page 8: ...alligator clip on the other end of the test lead to a ground point on the bed 3 Place the static control wrist strap on your wrist Connect the clip at the other end of the wrist strap cord to a ground point on the bed 1 4 WARRANTY Limited Warranty All Stryker Bertec products are guaranteed against material or manufacturing defects improper operation of mechanisms and premature wear of bed componen...

Page 9: ...ctive part Write down the name of the part and its part number Also write down the problem encountered while using the equipment N NO OT TE E It is very important that you refer to the Customer s Guide drawings and part lists that are specific to the bed needing repair Contact Stryker Bertec Technical Service department see section 1 2 or your local representative and provide all the previously no...

Page 10: ...at each part of the bed is tested q Install the foot and head boards on the bed Insert the foot board carefully so that the board connector connects smoothly to the foot end casing connector q Plug the power cord into a properly grounded hospital grade wall receptacle and ensure that the Power LED light at the foot end of the bed comes on when the On Off switch is turned on The bed is equipped wit...

Page 11: ...o Contour function works properly see Auto Contour Operations Manual page 21 q Leaving the bed in the Auto Contour position pull the instant CPR release handle optional equipment and ensure the Fowler and Knee Gatch will drop with minimal effort Wait and listen for the typical noise indicating that the Fowler actuator has reset itself during the resetting period no bed functions are available q Ch...

Page 12: ... SIDE RAIL INSIDE CONTROL PANEL ON OFF SWITCH HEAD SECTION CENTRE SECTION THIGH SECTION FOOT SECTION SIDE RAIL LATCH LEVER HEAD I V POLE HOLDERS RESTRAINT STRAP LOCATIONS HEAD END CASING SIDE MATTRESS RETAINERS RESTRAINT STRAP LOCATIONS PATIENT HELPER MOUNTING SOCKETS EMERGENCY CRANK STORED FOLEY BAG HOOKS FOOT END CASING EMERGENCY CRANK OPENINGS FOOT I V POLE HOLDERS SIDE MATTRESS RETAINERS FOOT ...

Page 13: ...ct warranty Cleaning Beds Hand wash all surfaces of the bed with a soft cloth moistened with a solution of lukewarm water and a mild detergent Wipe the bed clean and dry thoroughly to avoid build up of cleaning solution Bed Mattress Care Failure to properly clean mattress or dispose of them if defective will increase the risk of exposure to pathogenic substances which may cause injury to the patie...

Page 14: ...ge 15 to facilitate their sliding into the support tubes Bring the bed to its highest position before greasing the tubes q Head foot and Hi lo actuator screws see fig 2 2C page 15 q Head actuator screw guide see fig 2 2C page 15 q Clevis pins and nylon washers linking the actuator tubes to the head and Knee Gatch section lever arms and the two Hi lo lever arms see fig 2 2C page 15 q Actuator bolts...

Page 15: ...Preventive Maintenance Chapter 2 15 Lubrication Points Illustrated Figure 2 2A Figure 2 2E Figure 2 2C LEGEND 1 YEAR 2 YEARS 5 YEARS Figure 2 2 Figure 2 2D Figure 2 2B ...

Page 16: ... bed lubrication points described in section 2 2 q Inspection of all bolt locknut and screw tightening tighten if necessary q Engage brake pedal and push on the bed to ensure that casters lock securely q Using the Axial Steer pedal ensure that the 5th wheel engages and disengages properly q Side rails move latch and stow properly q All functions on the foot board control panel working properly giv...

Page 17: ..._____ PC Board Integrated Maintenance Program This bed has a PC Board equipped with a maintenance program To activate and process the program perform the following steps Unplug the bed power cord remove the foot board and the foot end casing cover see section 4 7 step 1 through 4 and fig 4 7A to gain access to the PC Board Move the board four dip switches to the ON position and replace temporarily...

Page 18: ...nt control F B H 13 0221 S A Fixed 2 way patient control F H 17 0193 S A Fixed 2 way patient control H F 17 0194 Side Rail assembly parts Head side rail protector 17 0220 Foot side rail protector 17 0221 3M adhesive tape 950 x 1 QDF7826 Side rail right handed release 17 0306 P Side rail left handed release 17 0307 P Dome cap DP1250 1 1 4 QDFP1514 Protective cap QPN 18748 Mattress support Assembly ...

Page 19: ... wall receptacle Check wall receptacle Power cord severed Replace power cord see section 4 10 Bed power cord connector improperly or not connected to the PC Board power cord connector in the head end casing Check cable connection see section 4 10 Refer to Connection Diagram in Appendix A for proper connecting position PC Board power cord improperly or not connected to PC Board Check cable connecti...

Page 20: ...connection see G fig 4 7A section 4 7 Refer to Connection Diagram in Appendix A for proper connecting position Foot board panel membrane defective Replace membrane see section 4 3 Foot board connector defective Replace connector see section 4 6 Foot end casing connector defective Replace connector see section 4 7 Side rail panel functions not activated through the foot board control panel lock out...

Page 21: ...n Appendix A for proper connecting position An actuator defective Identify faulty actuator and replace it see section 4 14 PC Board defective Replace PC Board see section 4 8 Bed functions operate without being activated or don t stop after command has been released Foot board or side rail panel membrane defective Replace membrane see section 4 3 and 4 4 PC Board defective Replace PC Board see sec...

Page 22: ...he left side of the fixed frame are tightly fastened Check micro switches and wires connected to them for proper connection Replace component as needed see section 4 18 Micro switch cable improperly connected to the PC Board Check cable connection see section 4 8 Refer to Connection Diagram in Appendix A for proper connecting position Micro switch cable running from the micro switch to the PC Boar...

Page 23: ...on 4 1 Side rail parts misaligned following a blow Replace side rail assembly see section 4 1 Brake does not engage when activated or do not release Fasteners of the brake activation mechanism not secured or parts misaligned Check all applicable linkage hardware and parts alignment Replace parts as needed see sect 4 19 Brake steer pedal One or both casters that are part of the locking mechanism de...

Page 24: ...ry to the patient or user and damage to the bed Always unplug the bed power cord from the wall outlet when cleaning or servicing the bed The GO BED uses oil impregnated shoulder spacers at hinge points Do not lubricate these shoulder spacers When shoulder spacers are found worn at preventive maintenance replace them N NO OT TE E Except for rare exceptions reference points i e A B C appearing in se...

Page 25: ...se Fowler to high position 3 Unplug the power cord from the wall receptacle 4 Unscrew the lock ring of the side rail cable plug J fig 4 1C page 25 and remove cable from the bed receptacle 5 If the bed being repaired is not equipped with the optional nurse call function proceed with step 10 If the bed being repaired is equipped with the optional nurse call function and its version is prior to versi...

Page 26: ...thers Support the assembly when removing the two last bolts N NO OT TE E Apply medium strength tread locker blue on the bolt treads before replacing the four bolts 11 Lift up assembly to disengage from anchor pin and remove it 12 Reverse the above steps to install the replacement head side rail assembly N NO OT TE E Be sure to connect the side rail cable to the bed receptacle before testing the be...

Page 27: ...ed without damaging them 5 Use a hammer and a blunt ended tool to remove the nylon protective caps B from the rear part of the two rail shafts 6 Remove lock rings C from each shaft and remove the defective barrier Keep the nylon washers D 7 Reverse the above steps to install the replacement rail N NO OT TE E Apply grease on the rail shafts before installing the rail Head Side Rail Replacement Rail...

Page 28: ...e inner face of the foot board and remove cover 5 Remove the screw C holding the membrane support to the foot board 6 Disconnect the defective membrane cable E from the board connector D 7 Remove the control panel plate F 8 Reverse the above steps to install the replacement membrane N NO OT TE E Be sure to connect the new membrane cable correctly The side of the membrane connector bearing the insc...

Page 29: ...e permanently fixed to it Changing a side rail control panel membrane means replacing one of the two sections of the control panel housing 6 Disconnect the faulty membrane cable C from the side rail connecting board D and remove the membrane 7 Reverse the above steps to install the replacement side rail control membrane N NO OT TE E Make sure to connect the new membrane cable correctly The side of...

Page 30: ...l connector cable B Loosen the two screws holding the cable wires to the multiple connector C and remove wires N NO OT TE E If the wall connector cable is made of three wires ensure that the red and orange wires are connected together in the same multiple connector slot 5 Test the nurse call wall connector cable if defective proceed with step 6 through step 8 and end procedure if functioning prope...

Page 31: ...a serial number C02025 the nurse call cable is in one section running from the nurse call switch to the multiple connector located in the head end casing if the switch is defective but the cable functions properly proceed with step 14 through step 18 and end procedure if one of the cable sections is defective read the following note and end procedure N NO OT TE E Replacing a defective nurse call c...

Page 32: ...ne C from the connector 5 Remove the two bolts washers sleeves locknuts D holding the connector E to its support F and remove defective connector 6 Reverse steps to install replacement foot board connector N NO OT TE E Make sure to connect the foot board control panel cable correctly The side of the cable connector bearing the inscription 1 must be aligned with the black wire of the foot board con...

Page 33: ...g positions of the cable connectors to the PC Board connectors On Off switch cable connector green wire facing pin 11 foot end casing connector cable connector black wire facing pin 1 Lay cover on a workbench 5 Remove the two bolts shoulder sleeves locknuts H holding the connector J to the foot end casing cover C and remove defective connector Keep the seal K 6 Reverse the above steps to install r...

Page 34: ...nnectors On Off switch cable connector green wire facing pin 11 foot end casing connector cable connector black wire facing pin 1 Lay cover aside 7 Carefully identify the position of all the cables connected to the PC Board before disconnecting them Disconnect cables 8 Remove locknut B holding the PC Board ground wire C 9 Remove the two screws D holding the PC Board support E to the frame and remo...

Page 35: ...kbench 7 Remove the On Off switch L by squeezing both sides and passing it through its housing aperture 8 Reverse the above steps to install replacement On Off switch 9 Test On Off switch and LED state indicator for proper operation before returning bed to service 4 10 BED POWER CORD REPLACEMENT N NO OT TE E Step 9 of this procedure requires that the connector be removed from the extremity of the ...

Page 36: ...E The following procedure aims at troubleshooting and replacing a defective part in the photoelectric night light assembly 1 Raise bed to maximum elevation and lock casters 2 Put the head side rails in the down position and raise the foot side rails 3 Raise the Knee Gatch to the high position 4 Unplug the power cord from the wall receptacle 5 Remove the head panel 6 Manually lift and fold the foot...

Page 37: ...ing pin 11 foot end casing connector cable connector black wire facing pin 1 Lay cover aside 14 Disconnect the night light cable connector A from the PC Board power cord connector B Note the connecting position of the connectors white wire facing white wire black facing black 15 Cut the cable tie holding cables together 16 Remove the 3 screws C holding the rail cover D to the left rail and slowly ...

Page 38: ...ector cable G fig 4 7A page 32 Note carefully the connecting positions of the cable connectors to the PC Board connectors On Off switch cable connector green wire facing pin 11 foot end casing connector cable connector black wire facing pin 1 Lay cover aside 5 Disconnect the two wires A connected to the 5A circuit breaker note their connecting positions and remove circuit breaker B from its locati...

Page 39: ...Board housing and remove outlet cable Note the position of the ground wire among the other N NO OT TE E Replace the auxiliary outlet cable ground wire exactly at the same position it was before being removed 18 Test the auxiliary outlet cable if defective proceed with step 19 through 21 if functioning properly suspect a problem with the PC Board refer to section 4 8 for the PC Board Replacement pr...

Page 40: ... install replacement foot section 11 Test foot section mobility for proper operation before returning bed to service Thigh Section Replacement N NO OT TE E Before ordering a replacement thigh section check if the bed is equipped with the Auto Contour option and if so mention it when ordering the part 1 Raise the bed to high position lock casters and bring mattress support to horizontal position 2 ...

Page 41: ...ock casters and bring mattress support to horizontal position 2 Unplug the power cord from the wall receptacle 3 Lower the four side rails without pushing them against the bed 4 Remove the four bolts shoulder spacers flat washers locknuts A linking the centre section to the thigh and head sections 5 Remove the four bolts washers B holding the centre section to the mobile frame and remove centre se...

Page 42: ... Remove the two mattress side retainers A and save them for the replacement head section 7 Plug the bed power cord and bring Fowler back to horizontal position 8 Remove the Rue ring washer nylon washers 2 clevis pin G fig 4 14 page 44 hooking up the head actuator tube to the head section lever arms N NO OT TE E Apply grease on the clevis pin and the nylon washers before hooking up the actuator tub...

Page 43: ... section Remove the head section 15 Reverse the above steps to install replacement head section 16 Test Fowler mobility for proper operation before returning bed to service Bed with Optional CPR When activating the CPR release all people and equipment must be removed from the area below and around the head and foot sections of the bed or serious personal injury or damage to equipment could occur 1...

Page 44: ... switch Note the wire connecting positions 13 Remove the bolt locknut K holding the upper part of the small locking lever to the head section and lay the assembly down 14 Remove the bolt shoulder spacers 2 locknut L linking the upper part of the mattress support lever to the head section and lay assembly aside 15 Remove the two bolts shoulder spacers 4 locknuts B fig 4 13D page 41 holding the uppe...

Page 45: ...LACEMENT N NO OT TE E Unless otherwise stated all reference points of each actuator replacement procedure will refer to figure 4 14 above HEAD ACTUATOR KNEE GATCH ACTUATOR HI LO ACTUATOR A C B D F E G K J L K L J HI LO ACTUATOR N M O P Q H R S Figure 4 14 ...

Page 46: ...rs On Off switch cable connector green wire facing pin 11 foot end casing connector cable connector black wire facing pin 1 Lay cover aside 9 Disconnect the Knee Gatch actuator cable B from the PC Board and disengage it from the strain relief bushing C 10 Loosen the bolt D holding the Knee Gatch actuator to the bracket until the actuator can be rotated downward and removed from its location N NO O...

Page 47: ...ring washer nylon washers 2 clevis pin G holding the head actuator tube to the head section lever arms N NO OT TE E Apply grease on the clevis pin and the nylon washers before hooking up the actuator tube to the head section 10 Loosen the bolt H holding the head actuator to the bracket until the actuator can be rotated downward and removed from its location N NO OT TE E Apply grease on the bolt th...

Page 48: ...frame 9 Remove the Rue ring washer nylon washers 2 clevis pin K holding the Hi lo actuator tube to the Hi lo lever arms N NO OT TE E Apply grease on the clevis pin and the nylon washers before hooking back the actuator tube to the Hi lo lever arms 10 Loosen the bolt L holding the Hi lo actuator to the bracket until the actuator can be rotated downward and removed from its location N NO OT TE E App...

Page 49: ...t covers 7 Remove the ratchet tie down strap replace the foot section to horizontal position and run both head section and Knee Gatch up and down completely a few times to spread grease evenly 8 Test Knee Gatch and Fowler mobility for proper operation before returning bed to service Head Actuator Screw Guide 1 Raise bed to high position lock casters and bring Fowler to horizontal position 2 Raise ...

Page 50: ...ts tube to the head section An improper adjustment of the actuator can damage the bed mechanisms 15 1 Proceed as follow to adjust the head actuator Plug the bed Make sure that the head actuator cable is connected to the PC Board Hold firmly the actuator tube and run the head actuator up for a few seconds then run it down until it stops This will be the head actuator lower limit Turn the tube in ei...

Page 51: ...nd the nylon washers before hooking up the actuator tube to the head section 4 Manually lift the head section to maximum height and attach it to the foot section using a ratchet tie down strap 5 Unplug the power cord from the wall outlet 6 Remove nut E holding the activation rod F to the activation lever disengage rod and lay it down 7 Remove the bolt locknut K holding the upper part of the small ...

Page 52: ...ff when the upper part of the small locking lever is removed from the head section 3 Unplug the power cord from the wall receptacle 4 Remove head panel 5 Disconnect the two wires J fig 4 13F page 43 from the micro switch Note the wire connecting positions 6 Remove the bolt locknut K fig 4 13F page 43 linking the upper part of the small locking lever to head section Disengage lever and lay the asse...

Page 53: ... Remove the two screws A holding the micro switch support B to the mobile frame right rail Remove support 5 Disconnect the two wires C from the micro switch D Note the wire connecting positions 6 Remove the two screws E holding the micro switch to its support 7 Reverse the above steps to install replacement micro switch 8 Test CPR mechanism for proper operation before returning bed to service Figu...

Page 54: ...o install replacement micro switch 7 Test Auto Contour function for proper operation before returning bed to service Head Section Micro Switch 1 Raise the bed to the high position and lock casters 2 Raise Fowler to approximately 40 degrees 3 Remove the two screws F holding the micro switch support G to the mobile frame left rail Remove support 4 Disconnect the two wires H from the micro switch J N...

Page 55: ...activation lever J fig 4 20 page 55 N NO OT TE E Before replacing the pressure screw apply medium strength tread locker blue on its tread 4 Remove the pressure screw B located on the head or foot locking lever E N NO OT TE E Before replacing the pressure screw apply medium strength tread locker blue on its tread 5 Remove the defective pedal Leave the pedal sleeve C in place Keep the two nylon wash...

Page 56: ...zontal position neutral 4 Remove the bolt locknut F holding the 5th wheel to the swing arms Remove defective wheel 5 Reverse the above steps to install the replacement 5th wheel 6 Test 5th wheel for proper operation before returning bed to service 5th Wheel Activation Lever J fig 4 20 Replacement 1 Raise the bed to the high position and lock casters 2 Unplug the power cord from the wall receptacle...

Page 57: ...NO OT TE E Be sure to position the activation lever horizontally before inserting each pedal shaft into its corresponding socket To do so position the top flat part of the lever parallel to the floor bring 5th wheel near the floor by pressing it to facilitate this operation 11 Test 5th wheel mechanism for proper operation before returning bed to service 5th Wheel Swing Arm Assembly Replacement N N...

Page 58: ... them from the retaining plates mark their position to help their re assembly 10 Remove the supports O from the 5th wheel mechanism Keep the torsion springs Q 11 Remove the bolts shoulder spacers 4 locknuts R holding the torsion levers S to the lower part of the two counter levers M 12 Remove the two torsion levers S from both ends of the torque shaft T by first removing the two locknuts U then th...

Page 59: ...part of the locking mechanism proceed with step 9 If the caster to be replaced is not part of the locking mechanism proceed with step 6 through step 8 and end procedure 6 Support the caster while removing the bolt washer H holding the caster shaft to the mounting socket J and remove caster 7 Reverse the above steps to install the replacement caster 8 Test casters before returning bed to service En...

Page 60: ... mechanism to the neutral position middle position Once done remove the locking axle from the caster shaft orifice Insert the caster shaft into the mounting socket J and insert the locking axle E completely reverse the pulled out move with the Rue ring hole nearly vertical Replace the locking lever on the locking axle make sure the pedal is in the neutral position before replacing the locking leve...

Page 61: ...ct with the stands still lower the bed until the clevis pin see step 6 holding the Hi lo actuator tube to the Hi lo lever arms is free from stress and easy to remove The Hi lo lever can now be easily dismantled 5 Unplug the power cord from the wall receptacle 6 Remove the Rue ring washer nylon washers 2 clevis pin K fig 4 14 page 44 holding the Hi lo actuator tube to the Hi lo lever arms A Avoid r...

Page 62: ...g them 9 Remove the Hi lo lever from its location by rotating it horizontally on one side to disengage the nylon sliders H from the rails J N NO OT TE E Apply grease on the nylon slider shafts K and under the sliders H before replacing the Hi lo lever Ensure the rail is greased on its inner lower and side surfaces 10 Reverse the above steps to install the replacement Hi lo lever 11 Test Hi lo func...

Page 63: ...s del paciente Interruptor automático del Centro de control del personal Controles del paciente Patient control Commande patient Carte de contrôle PC Board Tarjeta de circuitos impresos 04 1 120V 120V Mise à la masse Ground Tierra Moteur de tête Head motor Motor de la cabacera 120V Noir Black Negro Blanc White Blanco Rouge Red Rojo Vert Green Verde Moteur de lit Bed motor Motor de la cama 08 Fil e...

Page 64: ...OSE Figure 4 14A JACK STANDS POSITIONED UNDER THE HEAD END OF THE BED JACK STANDS POSITIONED UNDER THE FOOT END OF THE BED Figure 4 21A ALIGNMENT JIGS POSITIONED ON THE BED BASE FOR A HI LO ACTUATOR REPLACEMENT KNEE GATCH AND FOOT SECTION FOLDED BACK TOWARDS HEAD END OF THE BED Figure 4 1 ...

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