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Manual Reference
STERIS 4085 General Surgical Table Operator Manual P150832-639 and Maintenance Instructions P764333-766.
Manufacturer Recommendation / AEM Status
The manual supports a manufacturer-listed preventive maintenance program for safe and reliable table operation. STERIS states that a thorough preventive maintenance program is essential for safe and proper operation, and that regularly scheduled preventive maintenance is required for safe and reliable operation. The manual also states that maintenance and repairs should be performed by STERIS or STERIS-trained service personnel.
Manufacturer-Listed Frequencies
After Each Use / End of Day
Clean and disinfect the tabletop, pads, base, shrouds, yoke, and hand control. Ensure pads and tabletop are dry before reinstalling.
Weekly
Clean and disinfect the table. Check casters and floor locks for debris. Articulate the table through all movements and clean exposed surfaces.
Bi-Weekly
Operate each table function. Operation must be smooth and quiet.
Monthly
Check casters and floor locks for accumulated debris. Clean caster and floor lock areas.
Battery Charging
Recharge every 15 days in normal service, more often if usage demands. Recharge whenever the half-filled battery icon appears. If stored longer than three months, charge batteries every three months. The manual states fully charged batteries support approximately 100 to 150 procedures, about three weeks. Battery charge time is approximately/minimum 12 hours.
Preventive Maintenance Schedule
Recommended frequency of inspection is yearly. Usage and utility conditions may require more or less frequent inspections. Hydraulic oil level is listed at 6x per year. Most listed PM inspection items are 1x per year. Some items are listed as “Each Inspection.”
Manufacturer-Listed PM Items
Manufacturer-listed PM items include discussing equipment operation with department personnel; removing pads and inspecting pad covers and fastening strips; examining clamps and side rail hardware; tightening visible side rail screws; performing an overall visual inspection of the table, hand control, and power cord; checking X-ray tops for standoff tightness and cracking if equipped; verifying cap and shroud integrity; removing table shrouds and base cover each inspection; checking hydraulic oil filter element and hydraulic oil level; inspecting the floor beneath the table, hoses, fittings, and hydraulic components for oil leaks; verifying auxiliary/backup control foot pedal operation; cleaning, inspecting, and lubricating casters; checking floor lock mechanism operation; fully extending floor lock cylinders and inspecting for hydraulic leakage; inspecting table stability with floor locks engaged and on casters; checking pin and foot assemblies; verifying all foot pads are present; confirming the table rolls freely and is easy to handle; inspecting hand control housing and touch pads; verifying table positioning using the hand control and/or optional foot control; checking electrical connectors, cable plugs, power connector, cords, and cables; verifying backup hand control operation; verifying battery condition and battery charger status; verifying Auto Limit Sensor status; measuring both battery voltages and performing battery load/charge checks; checking LEVEL, back, leg, tilt, Trendelenburg/reverse Trendelenburg, height, headrest, and slide functions; verifying head and leg section locking devices; checking for play in floor-lock legs; lubricating as needed; reinstalling pads and inspecting for rips/tears; securing and sealing covers/shrouds; and inspecting the work area for removal of tools/materials.
Manufacturer-Listed Replacement Parts / Supplies
Manual-listed replacement parts include Primary Hand Control Assembly With Cord 150832-632, Power Cord 093909-354, Fuse Main 4.0 Amp 150832-335, Fuse Set 342213555, Pad Drive Head Section 150832-695, Pad Back/Seat Section 413724-464, and Pad Leg Section 413724-465.
Manual-listed maintenance tools/materials include socket set, metric Allen wrench, metric ratcheting wrench, Velcro pack, stainless steel cleaner, Loctite 222, Loctite 242, oil pack, anti-seize, Lubriplate HD-2, lint-free cloths, RTV, and adhesive.
AEM Note
If a facility performs this PM at a different interval or changes the listed activities, that should be handled under the facility’s approved AEM program, risk assessment, maintenance history, and applicable regulatory requirements.
What This PM Procedure Covers
This procedure covers visual inspection, cleaning-related inspection points, table movement and function checks, hydraulic leak checks, caster and floor lock checks, battery and charger checks, hand control checks, backup control checks, ALS checks, and electrical safety documentation per facility policy.
Required Tools and Equipment
Required tools and equipment include clean dry lint-free cloths, clean water, manual-compatible disinfectant/cleaner, basic hand tools for covers/shrouds/side rail hardware/access panels, level, digital multimeter for battery voltage checks, Lubriplate No. 2 or manual-listed equivalent when lubrication is needed, and a facility electrical safety analyzer if electrical safety testing is required by facility policy.
Do not use alcohol or phenolics for table cleaning/disinfection. The manual also warns not to spray cleaning fluid into electrical receptacles or directly into backup control openings or clearance spaces.
Step-by-Step PM Procedure
1. Review Safety and Remove From Clinical Use
Action: Confirm the table is not in active patient use. Review pinch point, tipping, electrical shock, infection control, and floor lock warnings before servicing.
Expected outcome: Table is safe to inspect and articulate.
Why it matters: The table has powered movement, hydraulic components, pinch points, and floor lock hazards.
2. Perform Overall Visual Inspection
Action: Inspect the table frame, base, column, shrouds, tabletop sections, side rails, accessories, pads, hand control, power cord, control cable, connectors, and visible hardware.
Expected outcome: No cracked, loose, damaged, missing, contaminated, or unsafe components.
Remove from service if: Power cord damage, hand control damage, cracked structural parts, loose side rail hardware, unstable accessories, torn pads that cannot be cleaned, or visible hydraulic leakage are found.
3. Inspect Pads and Fastening Strips
Action: Remove pads. Inspect pad covers, fastening strips on pads and table, and tabletop surfaces underneath.
Expected outcome: Pads are intact, cleanable, secure, and free from rips, tears, or fluid intrusion concerns.
4. Inspect Side Rails and Accessory Hardware
Action: Examine clamps, side rails, and visible side rail screws. Tighten visible side rail screws as needed.
Expected outcome: Side rails and accessory attachment points are secure.
Remove from service if: Side rails are loose, damaged, or cannot safely retain accessories.
5. Inspect X-Ray Tops If Equipped
Action: Remove and inspect X-ray top sections if present. Check for cracked sections and loose standoffs.
Expected outcome: X-ray tops are secure, undamaged, and reinstall correctly.
6. Inspect Shrouds, Covers, and Base
Action: Verify cap and shroud integrity. Remove table shrouds/base cover as required by the PM schedule and inspect internal accessible areas.
Expected outcome: Covers are intact, properly sealed, and can be secured after inspection.
7. Check Hydraulic System
Action: Check hydraulic oil level. Inspect floor below table, hoses, fittings, cylinders, and hydraulic components for oil leakage.
Expected outcome: Hydraulic oil level is acceptable and no abnormal leaks are present.
Remove from service if: Active hydraulic leakage, low oil level, damaged hoses/fittings, or uncontrolled table motion is found.
8. Check Floor Locks and Casters
Action: Clean and inspect casters. Check caster condition, floor lock mechanism, table stability, pins, foot assemblies, and foot pads. Confirm the table rolls freely when unlocked and is stable when locked.
Expected outcome: Casters roll freely, floor locks engage/disengage correctly, and the table is stable.
Remove from service if: Floor locks fail to hold, foot pads are missing, caster damage affects movement, or table stability is questionable.
9. Inspect Floor Lock Cylinders
Action: Fully extend floor lock cylinders. Visually inspect for oil dripping. Check cylinder shafts for hydraulic oil.
Expected outcome: No dripping hydraulic oil. A slight film may be present per manual wording.
Remove from service if: Oil forms a drop or floor lock cylinder leakage is present.
10. Check Hand Control and Optional Foot Control
Action: Inspect hand control housing, touch pads, display, and cable. Operate table positioning functions using hand control and optional foot control if equipped.
Expected outcome: Controls respond correctly, display values/icons are readable, and table motion is controlled.
11. Check Backup / Auxiliary Control System
Action: With tabletop at low height, use the backup hand control and foot pump. Press HEIGHT UP and pump the pedal.
Expected outcome: Tabletop raises correctly using the auxiliary control system.
Remove from service if: Backup control does not operate correctly.
12. Check ALS System
Action: Raise tabletop to the highest position. Move slide toward the head end limit. Lower the leg section cautiously until ALS warning lights and tabletop motion stops.
Expected outcome: ALS warning activates and motion stops before collision.
Remove from service if: ALS does not engage or table movement does not stop before a collision risk.
13. Check LEVEL Function
Action: Ensure reverse orientation is not active. Press LEVEL. Verify kidney/lateral tilt, Trendelenburg/back, leg, and slide return to level/neutral as applicable. Use a level to confirm tabletop level.
Expected outcome: Table returns to level/horizontal.
Remove from service if: LEVEL function fails or tabletop cannot be verified level.
14. Check Tabletop Operation
Action: Check all table movements: back section, leg section, tilt left/right, Trendelenburg/reverse Trendelenburg, height up/down, headrest manual operation, slide function, and kidney elevator if applicable.
Expected outcome: All movements are smooth, quiet, controlled, and free of collision, binding, drift, or abnormal noise.
Remove from service if: Movement is rough, noisy, uncontrolled, incomplete, or unsafe.
15. Check Leg Section Locking
Action: Verify leg section installs easily, locks securely, and releases correctly. Move table up/down and confirm no part collisions.
Expected outcome: Leg section locks securely and table movement remains safe.
16. Check Battery and Charger Status
Action: Verify battery charger status and battery condition. Measure both battery voltages. The manual-listed battery check states that the difference between battery readings must be less than 0.2 V, articulations must be performed for at least two minutes, voltage must not drop more than 0.6 V, voltage after waiting two minutes must have risen by 0.3 V at most, and voltage must rise above 28 V when 120 V is supplied.
Expected outcome: Batteries and charger pass the manual-listed voltage checks.
Remove from service if: Battery voltage difference, voltage drop, recovery, or charging behavior does not meet manual criteria.
17. Lubricate and Reassemble
Action: Examine lubricated parts and apply lubrication as needed. Reinstall covers, shrouds, X-ray tops if equipped, and pads.
Expected outcome: Covers and shrouds are secured/sealed, pads are installed, and no tools/materials remain.
18. Final Operational Check
Action: Run a final function check after reassembly. Confirm table locks, moves, levels, charges, and responds to controls correctly.
Expected outcome: Table is safe to return to service.
Electrical Safety Testing if applicable
The provided manual identifies the table as Class 1, Type B equipment and includes protective earth/equipotential symbols. It also warns that if the integrity of the external protective ground is in doubt, the table should be operated from its internal power source.
The manual does not list a specific electrical safety test interval, ground resistance limit, or leakage current limit in the PM schedule found in the provided manual. Do not invent one.
Ground resistance measured in ohms, expected ≤ 0.5 Ω or facility/NFPA 99 criteria if different.
Touch/chassis leakage measured in microamps:
Facility limit used =
Result =
Pass / Fail =
Applied part / patient leakage:
Facility policy requires? Yes / No =
Result =
Pass / Fail =
Pass / Fail Criteria
PM Pass Criteria
PM passes when the table is visually intact; pads, side rails, accessories, covers, and shrouds are secure; no unsafe hydraulic leaks are present; floor locks and casters operate correctly; the table is stable with floor locks engaged; hand control, optional foot control, and backup control function correctly; ALS activates correctly; LEVEL function works and tabletop verifies level; all tabletop movements are smooth, quiet, controlled, and within expected operation; battery and charger checks pass manual-listed criteria; and electrical safety testing passes facility criteria if performed.
Remove From Service Criteria
Remove from service if any hydraulic oil leak forms drops or affects operation; floor locks fail; the table is unstable; casters are unsafe; the power cord, control cable, hand control, connector, or wiring is damaged; table movement is uncontrolled, noisy, binding, drifting, incomplete, or unsafe; ALS does not stop movement before collision risk; LEVEL function fails; leg or head section locking device fails; battery/charger check fails; electrical safety test fails facility criteria; or any condition creates patient, staff, or equipment safety risk.
Copy/Paste CMMS Work Order Procedure
Use the manufacturer service manual, facility policy, and approved AEM program to determine the final PM interval and return-to-service requirements.