How much does electric motor repair cost?

Electric motor repair costs vary based on motor size, type of failure, and repair needed. Small motor repairs typically start at $200-$500, while large industrial motor rewinds can range from $2,000-$15,000+. Ace Electric Motor and Pump Co. provides free estimates — call (209) 464-0781.

Should I rewind or replace my electric motor?

The decision depends on motor size, age, efficiency class, and repair cost vs. replacement cost. Generally, motors over 50 HP are often more cost-effective to rewind. Motors under 10 HP may be cheaper to replace. An EASA-accredited shop like Ace Electric can evaluate your motor and recommend the most cost-effective option.

What causes electric motor failure?

The six most common causes of electric motor failure are: bearing failure (over 50% of failures), winding insulation breakdown from overheating, voltage imbalance, contamination from moisture or dirt, overloading beyond rated capacity, and misalignment. Preventive maintenance programs can catch most issues early.

How long does electric motor repair take?

Standard electric motor repairs typically take 3-5 business days. Emergency rush service is available for critical production motors, often with 24-48 hour turnaround. Large motor rewinds may take 1-2 weeks. Ace Electric Motor offers emergency service — call (209) 464-0781.

What is EASA accreditation and why does it matter?

EASA (Electrical Apparatus Service Association) accreditation means a motor repair shop follows strict quality standards for repair and testing. EASA-accredited shops ensure your motor is returned to original manufacturer specifications or better, protecting your investment and ensuring reliability.

Do you offer on-site electric motor repair?

Yes, Ace Electric Motor and Pump Co. provides on-site maintenance and repair services throughout Stockton, CA and the Central Valley. Our mobile technicians perform vibration analysis, laser alignment, troubleshooting, and many repairs at your facility to minimize downtime.

What types of pumps do you repair?

Ace Electric repairs all types of industrial and commercial pumps including centrifugal, submersible, vertical turbine, positive displacement, booster, and sewage pumps. We service all major brands and provide both in-shop and on-site pump repair in Stockton, CA.

What is a VFD and do you install them?

A VFD (Variable Frequency Drive) controls motor speed by varying electrical frequency. VFDs save energy, reduce mechanical stress, and provide precise speed control. Ace Electric installs, programs, and repairs VFDs from ABB, Siemens, Allen-Bradley, Yaskawa, and other major manufacturers.

How much does industrial gearbox repair cost?

Industrial gearbox repair costs typically range from $800 to $5,000 for small to mid-size gear reducers, and $5,000 to $25,000 or more for large industrial gearboxes requiring extensive gear replacement or custom machining. The final cost depends on gearbox size, type (worm, planetary, helical, or bevel), extent of damage, and whether replacement gears need to be manufactured. At Ace Electric Motor & Pump Co., we provide a free inspection and written estimate before any work begins.

How long does gearbox repair take?

Standard gearbox repairs are typically completed in 5 to 10 business days, depending on the scope of work and parts availability. For critical production equipment, we offer emergency and expedited service with turnaround as fast as 48 to 72 hours. On-site field repairs for diagnosis and minor repairs can often be completed same-day.

Should I repair or replace my gearbox?

Repairing is usually the better option when the gearbox housing is structurally sound, replacement parts are available or can be manufactured, and the repair cost is less than 50-60% of a new unit. Replacement makes more sense when the housing is cracked beyond repair, the design is obsolete, or repeated failures indicate a fundamental mismatch for your application.

What are the most common causes of gearbox failure?

The six most common causes of industrial gearbox failure are: inadequate or contaminated lubrication (the leading cause), bearing fatigue from misalignment or overloading, gear tooth wear or pitting from sustained heavy loads, seal failures that allow contaminant ingress, thermal overload from insufficient cooling, and improper installation or shaft alignment.

Do you offer on-site gearbox repair?

Yes. Ace Electric Motor & Pump Co. provides 24/7 on-site field service for gearbox diagnosis, minor repairs, alignment, and oil changes across the entire Central Valley, including Stockton, Sacramento, Modesto, Tracy, and surrounding communities.

What brands of gearboxes do you repair?

We repair gearboxes from all major manufacturers including SEW-Eurodrive, Nord, Falk (Rexnord), Dodge, Sumitomo, Winsmith, Boston Gear, Bonfiglioli, Brevini, Flender (Siemens), Hansen, and David Brown Santasalo. We also repair discontinued and legacy gearboxes using our precision machine shop to manufacture components to OEM specifications.

What does EASA accreditation mean for gearbox repair?

EASA (Electrical Apparatus Service Association) accreditation means that Ace Electric Motor & Pump Co. follows documented quality standards for repair processes, testing procedures, and workmanship. An accredited shop undergoes regular audits and maintains calibrated equipment, trained technicians, and traceable quality records.

Can you manufacture replacement gears?

Yes. Our on-site precision machine shop can manufacture spur gears, helical gears, worm wheels, bevel gears, splines, and keyways. This is especially valuable for legacy gearboxes where OEM parts are discontinued. We reverse-engineer worn gears, manufacture replacements from high-quality alloy steels, and heat-treat them to match or exceed original specifications.

What is a Variable Frequency Drive (VFD)?

A Variable Frequency Drive (VFD) is an electronic device that controls the speed of an AC electric motor by varying the frequency of the electrical power supplied to it. Instead of running at full speed 100% of the time, a VFD slows the motor to match actual demand, similar to cruise control for your motor.

How much money can a VFD save on energy costs?

VFDs can reduce electric motor energy consumption by 20% to 50% depending on the application. For a 100 HP motor running 8,000 hours per year in California, that translates to $15,000 to $25,000 in annual electricity savings.

What is the typical payback period for VFD installation?

Most VFD installations pay for themselves in 12 to 15 months through energy savings alone. Over the 15-year life of the equipment, net savings can exceed $200,000 for a single motor. California utility rebates from PG&E can cover 25-50% of the installation cost, making the payback even faster.

What applications benefit most from VFD installation?

VFDs deliver the greatest savings on applications where the load varies, including irrigation pumps, HVAC systems, wastewater treatment pumps and blowers, cooling tower fans, and conveyor systems. Any pump, fan, or compressor that runs at less than full capacity for significant periods is a strong candidate.

Are there California rebates available for VFD installation?

Yes. PG&E and other California utilities offer energy efficiency rebates for VFD installations through their customized incentive programs. These rebates can cover 25% to 50% of the installation cost. An experienced VFD installer like Ace Electric Motor & Pump Co. can help navigate the rebate application process.

What are common VFD installation mistakes to avoid?

The five most common mistakes are improper sizing based on horsepower instead of full-load amperage, ignoring harmonic distortion that affects other equipment, inadequate cooling and ventilation for the drive, exceeding cable length limits between the VFD and motor which causes voltage spikes, and skipping a motor assessment to determine if the existing motor needs insulation upgrades.

PLC vs Relay Logic: Why Upgrading to Programmable Controls Pays Off

josh7486
Mar 21
3 min read

The Problem with Legacy Relay Panels

Thousands of industrial facilities still rely on hardwired relay logic panels designed decades ago. While relay-based systems were the standard for their time, they come with growing problems: finding replacement relays and timers gets harder every year, troubleshooting requires tracing physical wires through crowded panels, making control changes requires physically rewiring connections, and a single stuck relay can shut down an entire process. If your facility is running relay panels, you're living on borrowed time.

What Makes PLCs Different

A Programmable Logic Controller (PLC) replaces all those physical relays, timers, and counters with a single programmable computer designed for industrial environments. Instead of hardwired connections determining your control logic, the PLC runs a program that can be modified, backed up, and shared. Popular industrial PLC platforms include Allen-Bradley (Rockwell Automation), Siemens, ABB, Mitsubishi, and Omron.

The fundamental advantage is flexibility. Want to change a timer value from 10 seconds to 15 seconds? With relays, you physically swap the timer. With a PLC, you change a number in the program — done in 30 seconds. Need to add a new interlock or safety condition? With relays, that means designing new wiring, pulling wire, and testing. With a PLC, you add a few rungs of logic and download the program.

Benefits of PLC Conversion

Faster troubleshooting is often the biggest immediate benefit. PLC software shows real-time status of every input, output, and internal logic element. A technician can see exactly which sensor is tripped, which condition isn't met, or where the sequence is stuck — all from a laptop screen instead of crawling through a panel with a multimeter. This alone can reduce troubleshooting time from hours to minutes.

Improved reliability comes from eliminating mechanical contacts that wear out, stick, and corrode. A PLC has no moving parts in its logic — solid-state outputs last millions of operations compared to thousands for mechanical relays. Data logging and diagnostics let you track equipment performance, record fault histories, and identify recurring problems before they cause unplanned downtime.

Remote monitoring and control capability means you can check equipment status and make adjustments from anywhere with network access. This is increasingly important for facilities that run nights and weekends with minimal staffing.

Planning a PLC Conversion

A successful relay-to-PLC conversion starts with documenting the existing system — creating or updating wiring diagrams, identifying all inputs (switches, sensors, limit switches) and outputs (motors, solenoids, indicators), and understanding the control sequence. The new PLC program is then written to replicate the existing functionality, often with improvements identified during the documentation phase.

The physical conversion involves installing the PLC hardware, rewiring field devices to PLC I/O modules, and removing the old relay components. Most conversions can be done during a planned shutdown weekend, minimizing production impact. The new system is thoroughly tested before going live, and the old relay panel wiring diagrams are kept as reference.

HMI Touchscreens: The Perfect PLC Companion

Adding a Human Machine Interface (HMI) touchscreen alongside your new PLC gives operators visual feedback on equipment status, alarm history, and process values. Instead of reading pilot lights and selector switches, operators see clear graphical displays showing exactly what's happening in real time. HMIs can also provide guided startup sequences, alarm management, and production reports.

Ace Electric's Automation Expertise

Ace Electric Motor & Pump Co. specializes in PLC programming and automation controls for industrial facilities throughout Stockton, CA and the Central Valley. We handle the complete conversion from documentation and design through programming, installation, and commissioning. Our team works with Allen-Bradley, Siemens, ABB, and other major platforms. Call (209) 464-0781 to discuss upgrading your control systems.