Integrated Traction System Inspection and LOTO Field Practice — Elevator Mechanic (pre-apprentice)

Objective. Students will perform a complete pre-operation inspection of the training traction elevator from machine room through pit, applying correct lockout/tagout at each step and completing all documentation without prompting.

Why This Practice Session Matters

A traction elevator is a system of interconnected mechanical, electrical, and hydraulic components that must all function correctly before a car carries a single passenger. Pre-operation inspection and lockout/tagout (LOTO) are not formalities — they are the procedures that prevent crush injuries, electrocutions, and fatal falls. In this session you will walk the entire system from machine room to pit, apply LOTO correctly at each control point, and document everything as a licensed mechanic would on a real job site.

Lockout/Tagout: Principles and Procedure

LOTO is governed by OSHA's Control of Hazardous Energy standard (29 CFR 1910.147). The goal is to bring every energy source — electrical, gravitational, mechanical, and hydraulic — to zero before you work. For a traction elevator the critical energy sources are the main line electrical supply to the machine room, the control panel power, and the stored mechanical energy in the suspended car and counterweight.

The six-step LOTO sequence for this exercise:

1. Notify — inform everyone who uses or works near the elevator that it is being taken out of service.

2. Identify — locate every energy isolation point: the main line disconnect, the control power switch, and any secondary feeds.

3. Isolate — open the main line disconnect and the control power switch to interrupt all electrical energy.

4. Lock and tag — each individual mechanic applies their own personal lock and a completed tag to every isolation device. One lock per person, every time — never share a lock.

5. Release stored energy — allow the car to settle; confirm the brake is set. If the car is not at a landing, follow the instructor's direction before entering the hoistway.

6. Verify zero energy — attempt to start the car using the normal call button and the car operating panel. Confirm no movement and no power indicator lights are on. Use a calibrated voltage tester on the load side of every disconnect before touching any conductors.

Document every step on the LOTO log sheet as you complete it. A blank field on the log is treated the same as a missed step during scoring.

Machine Room Inspection

Begin at the machine room with the elevator still in normal service, then apply LOTO before touching any equipment. After verification:

Motor and brake: Look for unusual heat discoloration, oil seepage around the brake solenoid, and worn or glazed brake shoes. The brake must hold the rated load plus 25 percent — if shoes are glazed, braking capacity is compromised.
Sheave and grooves: Inspect each groove for uneven wear, cracking, or rope seating depth. Ropes should sit in the groove without bottoming out. Measure groove depth with the appropriate gauge if available.
Drive ropes (hoist ropes): Examine each rope for broken wires, kinking, bird-caging, corrosion, and lubrication. ASME A17.1 sets specific criteria for when ropes must be replaced; familiarize yourself with those requirements in the current edition.
Governor: Confirm the governor rope is properly seated, the governor spins freely, and the overspeed trip mechanism has not been tampered with.

Hoistway and Car Frame Inspection

Enter the hoistway only after LOTO is fully applied and verified. Work top-down from the car top:

Car frame and sling: Check for cracks, deformation, or loose fasteners at crosshead, uprights, and plank.
Guide shoes: Look for worn gibs or rollers, proper lubrication at the guide rails, and secure attachment to the car frame.
Safeties: Confirm both progressive or instantaneous safety jaws move freely and are properly connected to the governor rope linkage. Any binding or corrosion must be reported.
Traveling cable: Inspect for chafing, kinking, or insulation damage along the full run.

Pit Inspection

Enter the pit only after confirming LOTO, activating the pit stop switch, and ensuring adequate lighting. Never enter a pit with a running elevator.

Buffers: Oil buffers must have the correct fluid level and show no leakage. Spring buffers must be undamaged and properly anchored.
Pit floor: Check for water accumulation, debris, and adequate clearance under the car.
Pit ladder and lighting: Confirm the fixed ladder is secure and the pit light functions.
Bottom of car: Inspect the underside of the car sling and lower guide shoes from below.

Defect Recognition and Reporting

When you find a defect — whether pre-staged by the instructor or discovered during a real inspection — record it immediately on the deficiency report form. Each entry must include: location of the defect, what you observed, the applicable ASME A17.1 requirement that is not being met, and the corrective action required. Vague entries such as "rope looks bad" are not acceptable. Write specifically: "Car hoist rope No. 3 exhibits broken wires exceeding allowable limits per ASME A17.1; rope must be replaced before return to service."

Conduct and Safety Rules for This Session

Hard hat, safety glasses, and work boots with ankle support are required throughout.
No student enters the hoistway or pit without a verified LOTO in place and the pit stop switch activated.
Any student observed bypassing or removing another person's lock commits an unsafe act and receives an automatic fail.
Call out "entering pit" and "leaving pit" each time so the instructor can track personnel.
If you are unsure whether a component meets code, flag it — never assume it is acceptable.

Key terms10

Lockout/Tagout (LOTO)An OSHA-required procedure for isolating all hazardous energy sources and securing them with personal locks and warning tags before maintenance or inspection work begins.

Zero energy stateThe condition in which every energy source (electrical, mechanical, gravitational) affecting the equipment has been isolated, released, and verified at zero before work proceeds.

Main line disconnectThe primary electrical shutoff switch in the machine room that disconnects all power to the elevator drive and control systems.

GovernorA mechanical overspeed detection device connected to the car safeties; it triggers the safety mechanism if the car exceeds a preset downward speed.

Progressive safetyA type of car safety device that grips the guide rails gradually to stop an overspeeding or free-falling car, limiting deceleration forces on passengers.

Sheave grooveThe machined channel in the drive sheave that seats and supports the hoist ropes; worn or improperly shaped grooves reduce traction and accelerate rope wear.

BufferAn energy-absorbing device at the bottom of the hoistway that cushions the car or counterweight in the event of an overtravel past the lowest landing.

Deficiency reportWritten documentation that identifies a specific inspection finding, cites the applicable code requirement, and states the corrective action required before the elevator returns to service.

Pit stop switchA mandatory safety switch located in the elevator pit that, when activated, removes the car from normal operation and prevents movement while personnel are working in the pit.

ASME A17.1The Safety Code for Elevators and Escalators published by the American Society of Mechanical Engineers; the primary US standard governing design, installation, inspection, and maintenance requirements.

In class: Full lockout/tagout exercise: each student individually isolates machine room power (main line disconnect and control power) using the program's LOTO station, applies personal lock and tag, verifies zero energy by attempting normal operation, and documents the procedure on a LOTO log sheet. · Systematic inspection run: working from a structured checklist, students inspect machine, brake, sheave grooves, rope condition, car frame, guide shoes, safeties, governor, pit equipment, and buffers, recording observations and flagging any pre-staged defects planted by the instructor. · Defect report and debrief: students write a brief deficiency report for each flagged item found, state the corrective action required, and participate in an instructor-led debrief reviewing any missed items and reinforcing code-based justification.
Materials: Training traction rig (full system), personal LOTO locks and tags, LOTO log sheets, comprehensive inspection checklist, deficiency report form, ASME A17.1 (current edition), NEIEP Traction module
Check: Instructor scores LOTO log and inspection checklist; student must correctly identify at least four of five planted defects, complete LOTO documentation with no missing fields, and commit zero unsafe acts — any unsafe act is an automatic fail requiring repeat.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.