Mechanical Equipment Alignment JHA (Job Hazard Analysis / Activity Hazard Analysis)
Updated 2026-06-23
A Mechanical Equipment Alignment JHA (Job Hazard Analysis / Activity Hazard Analysis) is the plan that keeps the crew aligning mechanical equipment from being caught by rotating equipment or stored energy, being pinched during the adjustment, or being harmed during the precision work. Mechanical equipment alignment aligns coupled rotating equipment (a motor to a pump, for example) — combining the rotating-equipment and stored- energy hazard, the pinch hazard, and the precision-work hazards. This guide walks through building a Mechanical Equipment Alignment JHA that names the rotating-equipment/energy, pinch, and precision-work hazards and assigns the energy-control, pinch, and work controls that hold up in the field.
Why mechanical equipment alignment needs its own JHA
Mechanical equipment alignment aligns coupled rotating equipment — a driver and driven machine (motor and pump, motor and fan, turbine and generator) — so their shafts are colinear, using dial indicators or laser alignment tools, and adjusting the equipment position with shims and jacking bolts. The defining feature is that the work is on rotating equipment that must be locked out (it cannot rotate during alignment), and involves moving/adjusting equipment. The hazards combine the rotating equipment and stored energy (the equipment is rotating equipment — it must be de-energized and locked out during alignment, because rotation during the work is a serious hazard, and there may be stored energy), the pinch (adjusting the equipment position — shimming, jacking, moving the equipment — brings pinch/crush hazards to hands at the equipment feet/coupling), the precision work (the alignment is precision work at the coupling — the detailed work and the position), and the equipment handling. The rotating-equipment/energy and the pinch justify a dedicated JHA.
Breaking mechanical equipment alignment into steps
The steps for a Mechanical Equipment Alignment JHA follow the alignment:
- De-energize and lock out the equipment
- Verify zero energy (the equipment cannot rotate)
- Set up the alignment tools (dial/laser)
- Measure the misalignment
- Adjust the equipment position (shim, jack, move)
- Manage the rotating-equipment, pinch, and precision hazards
- Verify the alignment
- Restore and return to service
Each step carries a hazard, and the rotating-equipment/energy, the pinch, and the precision work are where the most significant risks concentrate.
The hazards step by step
Rotating equipment and stored energy
The equipment is rotating equipment — it must be de-energized and locked out during alignment, because rotation during the work is a serious hazard (entanglement, being struck), and there may be stored energy (residual rotation, spring, or system energy). The controls are de-energizing and locking out the equipment (lockout/tagout of the driver and any energy sources), verifying zero energy (the equipment cannot rotate — testing/trying), ensuring the coupling cannot be driven, and the LOTO controls. The rotating equipment that must be locked out is a defining hazard — never align equipment that can rotate. (These follow the lockout/tagout fundamentals.)
Pinch
Adjusting the equipment position — shimming, jacking, moving the equipment — brings pinch and crush hazards to hands at the equipment feet, coupling, and adjustment points. The controls are keeping hands clear of pinch points during adjustment (using tools for shimming/positioning), controlled jacking/moving, ensuring the equipment is stable during adjustment, and the pinch controls. The pinch/crush during adjustment is a defining hazard. (These follow the material-handling fundamentals.)
Precision work
The alignment is precision work at the coupling — the detailed measurement and adjustment, the position at the equipment. The controls are safe precision work (positioning, the tools), and care at the coupling. (These follow the machinery-alignment fundamentals.)
Equipment handling
Moving/adjusting the equipment carries the handling hazards (the equipment weight, moving it). The controls are safe equipment handling/moving, and the material-handling controls. (These follow the machinery fundamentals.)
A simple Mechanical Equipment Alignment JHA structure
| Step | Hazard | Control | Standard |
|---|---|---|---|
| De-energize/LOTO | Rotation / energy | LOTO driver and energy sources | OSHA 1910.147 |
| Verify zero energy | Unexpected rotation | Verify zero energy, equipment cannot rotate | OSHA 1910.147 |
| Set up tools | Precision work | Safe setup of dial/laser tools | manufacturer |
| Adjust position | Pinch / crush | Hands clear of pinch points, controlled jacking, stable | OSHA 1926 |
| Verify alignment | Precision | Verify alignment, safe precision work | manufacturer |
| Return to service | Rotation | Restore guards, remove LOTO, return to service | OSHA 1910.147 |
Lockout/tagout and pinch-point control
A Mechanical Equipment Alignment JHA centers on lockout/tagout and pinch-point control. The lockout/tagout addresses the rotating equipment — it must not rotate during alignment — controlled by de-energizing and locking out the driver and energy sources, verifying zero energy (the equipment cannot rotate), and ensuring the coupling cannot be driven. The pinch-point control addresses the adjustment — shimming, jacking, moving the equipment — controlled by keeping hands clear of pinch points (using tools), controlled jacking/moving, and ensuring the equipment is stable during adjustment. A JHA built on lockout/tagout and pinch-point control, with precision-work controls, addresses the hazards that define mechanical equipment alignment.
From the field: what actually goes wrong
In fourteen years across federal, heavy civil, and industrial projects, mechanical equipment alignment has a defining hazard that is simple and non-negotiable: the equipment is rotating equipment, and it must not rotate during the alignment. Aligning a coupled driver and driven machine (a motor and pump, for example) means working right at the coupling and the shafts, so if the equipment can rotate — if the driver can start, or the shaft can turn — the worker is exposed to entanglement and being struck, a serious hazard. The control is lockout/tagout: de-energizing and locking out the driver and any energy sources, verifying zero energy so the equipment cannot rotate (testing or trying to confirm), and ensuring the coupling cannot be driven. You never align equipment that can rotate. This is the foundational control for all rotating-equipment work, and alignment is squarely rotating-equipment work.
The pinch is the second defining hazard, and it comes from the adjustment. On the projects I have run, aligning the equipment means adjusting its position — shimming under the feet, jacking, and moving the equipment small amounts — which puts hands at the equipment feet, the coupling, and the adjustment points, near pinch and crush hazards. So keeping hands clear of pinch points during adjustment (using tools for shimming and positioning), controlled jacking and moving, and ensuring the equipment is stable during the adjustment are the controls. The precision work at the coupling (the dial or laser measurement and the detailed adjustment) and the equipment handling round out the work. On return to service, guards are restored and the lockout removed. The JHA built on lockout/tagout and pinch-point control is the one that protects the alignment crew.
The bottom line
A Mechanical Equipment Alignment JHA names the rotating-equipment/energy, the pinch, and the precision-work hazards with specific controls — lockout/tagout with verified zero energy so the equipment cannot rotate during alignment, hands clear of pinch points with controlled jacking during the adjustment, and safe precision work at the coupling. The rotating-equipment lockout and the pinch are the defining concerns. The JHA that manages both is the one that protects the crew.
Frequently asked questions
Why must the equipment be locked out during alignment?
The equipment is rotating equipment, and alignment is done right at the coupling and shafts — so if the equipment can rotate (the driver starts, or the shaft turns), the worker is exposed to entanglement and being struck, a serious hazard. Controls are lockout/tagout of the driver and any energy sources, verifying zero energy (the equipment cannot rotate), ensuring the coupling cannot be driven, and never aligning equipment that can rotate.
What pinch hazards does alignment involve?
Adjusting the equipment position — shimming under the feet, jacking, and moving the equipment — brings pinch and crush hazards to hands at the equipment feet, coupling, and adjustment points. Controls are keeping hands clear of pinch points during adjustment (using tools for shimming/positioning), controlled jacking/moving, ensuring the equipment is stable during adjustment, and the pinch controls.
What is mechanical equipment alignment?
Mechanical equipment alignment aligns coupled rotating equipment (a driver and driven machine — motor and pump, motor and fan, turbine and generator) so their shafts are colinear, using dial indicators or laser alignment tools and adjusting the equipment with shims and jacking bolts. Proper alignment prevents premature wear and failure; the work is rotating-equipment work at the coupling, which is the source of the lockout and pinch hazards.
How is the equipment returned to service after alignment?
After the alignment is verified, the equipment is restored — guards and coupling covers reinstalled, the lockout/tagout removed per procedure, and the equipment returned to service in a controlled manner. Restoring the guards before removing the lockout is important, since the equipment becomes able to rotate once the lockout is removed.
Related JHAs
- Machinery Alignment JHA — the machinery-alignment fundamentals
- Vibration Isolation Installation JHA — related equipment-setting work
- Industrial Pump Installation JHA — the pumps aligned to drivers
- Turbine Alignment and Precision Grouting JHA — precision alignment of large machines
Written by Mustafa Tok, CSP, ASP, CHST — OSHA Authorized Outreach Trainer with 14+ years of international construction safety experience across federal, heavy civil, and industrial projects.