An integrated voltage regulator and brush holder module, a key component of the alternator. Its function is to maintain a constant charging voltage, regardless of engine speed, and to supply excitation current to the rotor via carbon brushes. It is the most common point of failure in an alternator, and its replacement restores full charging performance.
Aftermarket quality product – an intelligent choice combining excellent quality with an attractive price.
| Brand (Machine Type) | Model |
|---|---|
| JCB (Backhoe Loaders) | 2CX, 3CX, 4CX (with Perkins engines, manufactured before approx. 2005) |
| JCB (Telehandlers) | Loadall (older models with Perkins engines) |
| JCB (Other Machines) | ROBOT, Forklifts (with Perkins engines) |
The list above is for reference. It is crucial to ensure that your machine is fitted with an alternator with part number 714/40476 or related.
Charging problems often result from a poor electrical connection. Before installing the new regulator, thoroughly clean the battery terminals and all contacts and cables at the alternator. Use a dedicated contact cleaner, then protect the connections with HYPTRON copper grease to ensure perfect current flow.
The voltage regulator protects the battery and the entire machine's electronics from damage due to excessive voltage, while the brushes supply current to the rotor. The failure of either of these components leads to charging problems and can result in the machine being immobilized due to a dead battery.
Replace the regulator if you notice the following symptoms:
✓ Economical Alternator Repair: The GX-AFTER Solution
You don't have to buy an expensive new alternator when only one of its components fails. Replacing the regulator and brushes is a smart choice that allows you to restore the alternator to full efficiency for a small price. This is the most common and cheapest to fix charging system failure.
Is the charging light giving you no peace? Don't risk immobilizing your machine!
A lack of charging is a guaranteed downtime at the least expected moment. Order a new regulator today and restore a reliable power source to your machine!
This is the most common cause of charging problems. Other possible reasons include a faulty alternator rectifier, a broken or slipping V-belt, or a problem with the wiring.
2. Is replacing the voltage regulator difficult?In most alternators, this is a relatively simple operation. Usually, you just need to remove the plastic cover from the back of the alternator and unscrew the two or three screws holding the regulator. This replacement does not require removing the entire alternator from the engine.
3. My battery is constantly overcharging ("boiling"). What is the cause?This is a classic symptom of a faulty voltage regulator that is supplying too high a charging voltage. It should be replaced immediately, as overcharging will destroy the battery and can damage other electronics in the machine.
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Stable Charging
Restores correct voltage in the system.
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Battery Protection
Prevents undercharging and overcharging.
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Cost-Effective Repair
A cheap alternative to buying a new alternator.
Have doubts or need confirmation to avoid costly downtime? Call us. Our experts will help you choose the right part to get your equipment back to work as soon as possible.
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Alternator regulator and brush holder - 714/40476 suitable for JCB 3CX 4CX backhoe loaders and many other machines with engines installed before 2005.

















