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Services · Shop

Transformer Repair, Reconditioning & Modification

Shop repairs, reconditioning, and modifications for transformers from all manufacturers. Every project includes a full inspection and documented recommendations.

What we do

Three ways we help.

The scope depends on the condition of the unit. Evaluation comes first, and a rebuild is recommended only when the condition justifies it.

JCL technicians inspecting an open control cabinet

Inspection & Evaluation

We inspect and test the unit to establish its condition, then recommend repair, reconditioning, modification, or replacement, with documented findings.

Diagnostic testingOil processingInspection & evaluationPost-repair testingAcceptance testing
Request an Evaluation
Two JCL technicians working inside an open transformer tank

Repair & Reconditioning

Component repairs, leak repairs, and complete teardown and rebuild, tested before the transformer ships back. Reconditioning extends the useful service life and often costs less, with a shorter lead time, than replacement.

Oil leaks & gasketsBushings & controlsTap changer rebuildsInternal connectionsWeld & tank repairPost-fault damageVacuum processingComplete teardown
Scope a Repair
A JCL technician grinding a transformer cabinet in the shop, sparks flying

Modification & Upgrade

When system requirements change, we evaluate whether the existing unit supports a re-rating, voltage change, or cooling upgrade. We also fabricate components in-house when OEM parts are obsolete.

Re-rating & capacityVoltage reconfigurationCooling upgradesLTC retrofitsTanks & coversRadiators & headersBushing turretsSkids & adapter plates
Discuss a Modification
Repair or replace

Why repair instead of replace?

We inspect and test the unit first, then recommend a path based on its condition and your requirements. Repair or reconditioning makes sense when:

Repairable damage

Oil leaks, failed components, and fault damage limited enough to correct in the shop.

Serviceable core and coils

If the active part passes inspection, reconditioning extends the service life of the existing unit.

Replacement lead times

New transformers carry long lead times. Repair or reconditioning is often finished sooner.

Changed requirements

A voltage or capacity change may call for a modification instead of a replacement.

How it works

From first call to return to service.

01

Call

Describe the problem. A nameplate photo is helpful if you have one.

02

Inspect

We inspect and test the unit, then recommend repair, reconditioning, modification, or replacement.

03

Quote

Scope, price, and timeline where applicable. Work does not begin without your approval.

04

Repair / Recondition / Modify

The approved scope is performed in our shop, from component repairs to complete rebuilds.

05

Test & Return

Testing and documentation are completed before the transformer ships for return to service.

Related services

Need more than shop work?

A JCL crew setting a power transformer on site

Field Services

Installation, commissioning, testing, maintenance, and field repairs.

Field Services
A JCL rental transformer staged for dispatch

Transformer Rentals

Temporary transformer capacity while your unit is repaired, replaced, or maintained.

Rentals
Acceptance testing with test leads and a laptop

Service Programs

Planned testing, maintenance, and lifecycle support.

Service Programs
A JCL technician working against the sun to restore power24/7/365

Emergency Response

Rapid response to transformer and electrical equipment failures, any hour, nationwide.

Emergency Response
In our shop

Start with what you know.

An oil leak, a failed unit, a damaged component, a voltage or capacity change, or a problem you have not identified yet. You do not need a complete diagnosis to contact us. Describe what you see and we will handle the evaluation.