The Anatomy of an Otis 131HT Repair
A closer look at how our Industrial Division brought a classic elevator motor back to life.
The Otis 131HT is a workhorse. This gearless DC traction machine (aka the elevator’s muscles) has powered elevators in high-rise buildings for decades. While it was built to last, even the toughest machines eventually need some serious TLC to keep moving people safely and efficiently.
At EMR, we’ve worked on countless 131HTs – but our most recent repair is worth spotlighting. This particular Otis 131HT gearless machine came into our shop in rough shape, but Industrial Mechanic, Jerry Miller, brought it back to life with skill and precision.
A Look Inside the Repair!
The machine arrived in worn condition. The bearings were shot, the sheave was damaged, and the
braking system needed attention. Here’s how Jerry tackled the job:
- Disassembly & Assessment
Jerry began with a full teardown, carefully inspecting each component for wear. The bearings were completely worn out, compromising smooth operation and safety. - Bearing Replacement
He replaced the bearings with high-quality replacements, ensuring the motor would run smoothly and quietly for years to come. - Sheave Installation
A brand-new sheave was installed — a critical upgrade for restoring proper traction and performance. - Brake Repair & Reassembly
With the core components addressed, Jerry reassembled the machine, reinstalled the brake, and dialed it in with precision, making sure everything was aligned and functioning as intended.
We ride elevators every day without thinking twice about what makes them move. But behind those smooth rides and automatic doors is a complex system of motors, brakes, bearings, and controls – all of which require regular maintenance to stay safe and reliable. Jerry’s work on this 131HT is a perfect example of what our Industrial Division stands for: skill, attention to detail, and pride in the craft. From replacing critical components to fine-tuning the brake system, his expertise brought a struggling machine back to dependable working condition.
