Stryker S3

Asset Type

Hospital Bed

Manufacturer

Stryker

Model

S3

Manual Reference

MedSurg Bed Model 3002 S3 Patriot Series Maintenance Manual, 3006-009-102 REV C, 2008/10. Preventative Maintenance section, pages 18–19; Setup Procedures, page 15; Safety Tips and Guidelines, pages 11–13; Maintenance Menu / Scale Calibration, pages 60–65.

Manufacturer Recommendation / AEM Status

Manufacturer-Listed PM Frequency

Stryker states that preventive maintenance should be performed at a minimum of annually to ensure all bed features are functioning properly. The PM checklist also recommends checking the listed items annually and keeping the completed sheet on file.

Manufacturer-Listed PM Items

• Inspect fasteners, headboard, footboard, mattress cover, accessory components, and labeling condition.
• Check brake, steer, siderail, CPR release, foot prop, IV pole, foley bag hooks, optional CPR board, night light, and motion interrupt operation.
• Verify head-end siderail and footboard controls, including applicable LEDs.
• Verify Scale and Bed Exit calibration, where equipped.
• Verify iBED Awareness siderail switches and indicator LEDs, where equipped.
• Inspect the power cord, cabling, electrical connections, frame grounds, and ground chains.
• Measure ground impedance and leakage current.
• Apply grease to manufacturer-identified lubrication points.
• Check Fowler angle accuracy, siderail gas springs for oil leakage, and Fowler motor flexible mounting condition.

Manufacturer-Listed Electrical Safety Limits

Ground impedance: Not more than 100 milliohms / 0.100 Ω.

Current leakage: Not more than 300 microamps.

Manufacturer-Listed Lubrication Materials

Siderail glide rods: Syn-Tech NS-18191-G grease, Stryker p/n 3000-200-700.

Fowler drive ball screw: Mobil #28 grease.

Fowler drive brake spring: If dry, apply a thin film of Syn-Tech grease, Stryker p/n 3000-200-700.

Post-Repair Safety Inspection

The manual does not provide one universal post-repair electrical safety inspection checklist. It instructs the technician to test the bed for proper operation before returning it to service after applicable repairs. Following repairs affecting electrical protection, power cords, grounding, leakage paths, controls, motion, Scale, Bed Exit, or iBED Awareness, perform the affected functional verification and electrical safety testing before return to service.

AEM Note

If the facility performs this PM at a different interval or changes the listed activities, the change should be managed under the facility's approved AEM program, risk assessment, maintenance history, and applicable regulatory requirements.

What This PM Procedure Covers

• Annual mechanical and structural inspection.
• Brake, steer, siderail, CPR, accessory, and motion safety checks.
• Electrical cord, grounding, ground impedance, and leakage current verification.
• Control panel, LED, night light, and option-specific function checks.
• Scale, Bed Exit, and iBED Awareness checks where equipped.
• Manufacturer-listed lubrication points.
• Final pass/fail determination and CMMS documentation.

Required Tools and Equipment

• Electrical safety analyzer capable of measuring protective earth / ground impedance and leakage current.
• Basic hand tools needed to access and inspect components, as applicable.
• Syn-Tech NS-18191-G grease, Stryker p/n 3000-200-700.
• Mobil #28 grease.
• Clean cloths for inspection of ground chains and accessible components.
• Known test weight for scale calibration verification, only if the bed is equipped with a Scale / Bed Exit system and calibration is being performed. The calibration menu displays 50 lb as the default selected weight; select and apply the actual calibration weight used.
• Facility-approved interface or Nurse Call test method, where equipped and included in local PM scope.

Step-by-Step PM Procedure

1. Identify Bed Configuration and Remove From Clinical Use

Action: Confirm the bed model, serial number, and installed options, such as Scale, Bed Exit, iBED Awareness, Nurse Call, optional 110 V outlet, night light, IV pole, CPR board, or pendant. Remove the bed from patient use for PM. Ensure no patient is on the bed during testing, calibration, or service activity.

Expected outcome: The correct PM scope is selected for the actual bed configuration, and the bed is safe to inspect and test.

2. Inspect General Condition and Structural Components

Action: Inspect the bed for secure fasteners; cracks or splits in the headboard and footboard; rips or cracks in the mattress cover; damaged, loose, or missing hardware; damaged IV pole, foley bag hooks, foot prop, or optional CPR board; degraded footboard control labeling; siderail gas spring oil leakage; and Fowler motor flexible mounting damage or wear.

Expected outcome: Structural components and patient-contact surfaces are intact, secure, and free of damage that could affect safe use.

Remove from service when: Cracked or unstable frame components, damaged patient-support components, failed siderail gas springs, unsafe accessory mounts, or other hazardous physical conditions are found.

3. Check Brakes and Steer Function

Action: Engage the brake pedal. Push on the bed and confirm all casters lock securely. Inspect the brake assembly, including brake ratchet springs and brake bars at the head and foot ends, for wear or degradation. Release the brakes and confirm expected mobility. Engage and disengage the locking steer caster.

Expected outcome: The bed remains stationary with brakes applied, brake components function properly, and the locking steer caster engages and disengages properly.

4. Inspect Siderails and Siderail Latches

Action: Raise and lower each siderail. Confirm the siderails move smoothly, stow properly, and lock in the required positions. When raising a siderail, listen for locking clicks and physically check that the rail is secure. Inspect for damage, looseness, or abnormal movement.

Expected outcome: All siderails raise, lower, latch, lock, and stow properly.

Remove from service when: Any siderail cannot securely latch or lock, has excessive movement, or cannot be trusted for patient safety.

5. Verify CPR Release and Patient Support Components

Action: Raise the Fowler / back section. Activate the CPR release handle and confirm the back section drops with minimal effort. Check the foot prop, IV pole, foley bag hooks, and optional CPR board, where equipped.

Expected outcome: The CPR release works properly, and accessories and patient-support components are intact and functional.

6. Inspect Power Cord, Cables, Electrical Connections, and Grounds

Action: Inspect the power cord for fraying, cuts, cracked insulation, damaged plug, or strain relief damage. Inspect accessible cables for wear, pinching, entanglement, or damage from bed movement. Confirm accessible electrical connections are secure. Check ground connections to the frame. Inspect both ground chains for cleanliness, integrity, and floor contact.

The manufacturer checklist states that both ground chains must be clean, intact, and have at least two links touching the floor.

Expected outcome: No damaged electrical cords or cables are present, electrical connections and frame grounds are secure, and ground chains are intact, clean, and contacting the floor as specified.

Remove from service when: The power cord, plug, wiring, grounding connections, or ground chains are damaged or cannot be verified safe.

7. Check Footboard, Siderail Controls, LEDs, and Night Light

Action: Connect the bed to a properly grounded hospital-grade receptacle. Verify power / LED indication at the foot end. Operate each available function from the footboard control panel and both head-end siderails. Verify applicable LEDs operate. Confirm brake LEDs on the footboard and head-end siderails blink when brakes are not engaged. Verify the night light operates.

Expected outcome: All installed control functions respond properly, LEDs and night light operate as intended, and brake indication correctly identifies the released-brake condition.

8. Verify Powered Bed Motions and Fowler Angle

Action: Operate installed motion functions through their usable ranges, including bed up/down, Fowler up/down, Knee / Gatch up/down, and Trendelenburg / reverse Trendelenburg where available. Verify Fowler angle operation across the manufacturer-listed range of 0° to 60°.

Expected outcome: Movement is smooth and controlled. The bed does not exhibit unexpected motion, abnormal noise, binding, or failure to stop. Fowler movement reaches the intended range without unsafe operation.

Remove from service when: Motion is uncontrolled, inconsistent, obstructed, fails to stop, or any position cannot be safely achieved or maintained.

9. Test Motion Interrupt Function

Action: Press and hold the Bed Down control. As the bed lowers, push up on the motion interrupt pan beneath the bed. Verify downward motion stops. Release the pan and verify downward motion can continue.

Expected outcome: Downward bed motion stops when the motion interrupt pan is activated and resumes after release.

Remove from service when: The motion interrupt safety function does not stop downward movement.

10. Check Scale and Bed Exit System, If Equipped

Action: Verify Scale and Bed Exit features operate properly. Enter the Maintenance Menu as needed and review for load cell errors. For beds with Scale or Bed Exit capability, the Maintenance Menu automatically checks all four load cells and reports detected HL, HR, FL, or FR load cell errors. Confirm the Scale and Bed Exit system are calibrated properly. Perform scale calibration when required by PM findings, facility policy, repair history, or an indicated calibration issue.

Scale calibration summary, when performed: Select Calib. Scale from the Maintenance Menu, follow the display prompts, confirm the bed is not touched when instructed, select the actual calibration weight used, place that weight in the center of the bed when prompted, complete reverse Trendelenburg and Trendelenburg portions of the routine, save calibration, and verify the display reports Save Successful.

Expected outcome: No load cell errors are present. Scale and Bed Exit systems function properly. Calibration completes successfully when performed.

Remove from service when: Scale, Bed Exit, or load-cell errors remain unresolved when those functions are installed or needed for clinical use.

11. Check iBED Awareness Functions, If Equipped

Action: Confirm each siderail switch reports properly as siderail position changes. Verify the center light bar LED and side light LEDs operate. Confirm the system indicates siderail position appropriately.

Expected outcome: iBED Awareness siderail switches and LEDs function properly.

Important use limitation: iBED Awareness indicates siderail position but does not indicate that a siderail is locked. Physical verification of siderail locking remains necessary.

Remove from service when: iBED Awareness is installed and cannot reliably report siderail status, unless the feature is appropriately disabled or managed under facility policy before use.

12. Check Optional Nurse Call and 110 V Outlet Functions, If Equipped

Action: For beds equipped with Nurse Call, verify correct operation using the facility's approved test method. For beds equipped with the optional 110 V outlet, inspect outlet condition and include it in electrical safety evaluation when applicable.

Expected outcome: Installed options operate properly and do not create an electrical safety concern.

Manual-listed electrical note for 110 V outlet option: The total system chassis risk current should not exceed 300 microamps, and grounding continuity should be checked periodically.

13. Perform Manufacturer-Listed Lubrication

Siderail assembly glide rod surfaces: Apply Syn-Tech NS-18191-G grease, Stryker p/n 3000-200-700, to the glide rod surfaces.

Fowler drive ball screw: Apply Mobil #28 grease to the entire length of the ball screw.

Fowler drive brake spring: If dry, apply a thin film of Syn-Tech grease, Stryker p/n 3000-200-700, to the outside of the brake spring.

Expected outcome: Listed grease points are properly lubricated without excessive grease or contamination of adjacent components.

Electrical Safety Testing

The manual includes electrical safety measurements as part of the annual preventive maintenance checklist.

Protective Earth / Ground Impedance

Manufacturer-listed maximum: Ground impedance not more than 100 milliohms / 0.100 Ω.

Ground resistance measured in ohms, expected ≤ 0.100 Ω per the manufacturer-listed PM criterion, or facility / NFPA 99 criteria if different.

Result = __________________ Ω

Pass / Fail = __________________

Leakage Current

Manufacturer-listed maximum: Current leakage not more than 300 microamps.

Touch/chassis leakage measured in microamps:

Facility limit used = ≤ 300 µA per manufacturer-listed PM criterion, unless facility policy applies a different limit.

Result = __________________ µA

Pass / Fail = __________________

Electrical Safety Documentation Note

Document the analyzer used, test configuration, measured values, and pass/fail determination according to facility procedure. Do not return the bed to service when grounding integrity, power cord condition, or leakage current fails the applicable acceptance criterion.

Pass / Fail Criteria

PM Pass Criteria

• Manufacturer-listed annual inspection items are completed.
• Brakes, steer, siderails, CPR release, controls, LEDs, night light, motion interrupt, and installed options function properly.
• Power cord, cabling, electrical connections, frame grounds, and ground chains are acceptable.
• Ground impedance is ≤ 0.100 Ω.
• Leakage current is ≤ 300 µA.
• Scale, Bed Exit, Nurse Call, iBED Awareness, and optional outlet functions pass where equipped.
• Required lubrication is completed.
• No unresolved condition exists that could affect safe clinical use.

Remove From Service Criteria

• Brakes do not securely hold the bed.
• Any siderail does not securely latch or lock.
• CPR release or motion interrupt safety function fails.
• Powered movement is uncontrolled, unreliable, or unsafe.
• Power cord, grounding connection, accessible electrical wiring, or ground chain condition is unacceptable.
• Ground impedance exceeds 0.100 Ω.
• Leakage current exceeds 300 µA.
• Installed Scale, Bed Exit, iBED Awareness, or Nurse Call features are unreliable and required for clinical use.
• Cracked structural components, leaking siderail gas springs, or other hazardous physical damage is found.
• Any unresolved fault prevents safe return to service.

Use the manufacturer service manual, facility policy, and approved AEM program to determine the final PM interval and return-to-service requirements.