Alternator for Caterpillar ALTERNATOR CAT120H
Product Specifications
| Brand | Compatible Model(s) | OEM Part Number | Part Type | Availability |
|---|---|---|---|---|
| Caterpillar (CAT) | ALTERNATOR CAT120H | 1978820 | ALTERNATOR | ✓ In Stock |
Product Description
OEM Part Numbers: 1978820
| Machine Model | Part Number |
|---|---|
| ALTERNATOR CAT120H | 1978820 |
The 1978820 alternator cat120h is an electrical power generation component for the ALTERNATOR CAT120H, maintaining battery charge and supplying power to all machine systems during engine operation. Alternator failure causes progressive electrical system failure as the battery discharges, eventually resulting in complete machine shutdown at the job site. Engineered to OEM standard 1978820 for exact installation on the ALTERNATOR CAT120H and immediate restoration of charging capacity.
Key Features:
- Continuous Charging Output: Maintains battery charge and supplies electrical power to all machine systems during engine operation.
- OEM Specification: Manufactured to reference 1978820 for direct fitment on the ALTERNATOR CAT120H with correct voltage output.
- Heavy-Duty Electrical Rating: Built to handle the continuous electrical load demands of heavy industrial machinery.
The 1978820 alternator cat120h ensures continuous electrical power supply and battery charging on the ALTERNATOR CAT120H.
What Does This Alternator Do?
Generates electrical power while the engine is running to recharge the battery and supply all of the machine's electrical systems — including lights, ECU, sensors, solenoids, and the instrument panel.
Possible Alternator Problem Symptoms
If your machine is showing any of the following, a faulty alternator may be the cause:
- Battery warning light appearing on the instrument panel
- Battery draining despite the engine running normally
- Electrical accessories dimming or monitor display flickering
- Machine failing to start after being left standing for a short period
Why Buy From GCO Products?
Gautam & Company has been supplying earthmoving machinery spare parts since 1999. Here is why contractors, fleet operators, and dealers across India trust us.
Over 27 years of experience in the earthmoving parts industry.
Our team helps you confirm the right part before you order.
Proper GST invoices on every order for your accounting needs.
Fast dispatch from Jalandhar to all states across India.
Volume pricing available for fleet owners, dealers and distributors.
Both genuine OEM and quality aftermarket options available.
How to Confirm Compatibility
To ensure this part is the correct fit for your machine, have the following ready when you contact us:
- 1Machine Model & Year
E.g. Komatsu PC200-8, CAT 320D, JCB JS205 — include the model suffix if known.
- 2Machine Serial Number
Found on the machine's chassis plate. Helps confirm the exact production variant.
- 3OEM Part Number
From your parts manual, the old part itself, or the machine's service documentation.
Not sure if this part fits your machine?
WhatsApp Us to Confirm Typically replies within a few hoursDisclaimer: This is an aftermarket replacement part supplied by GCO Products (Gautam & Company) and is not manufactured by, affiliated with, or endorsed by the original equipment manufacturer (OEM). All brand names, model numbers, and OEM part numbers referenced on this page are used solely for the purpose of identifying compatibility and describing the application of this part. All trademarks, registered marks, and brand identifiers remain the exclusive property of their respective owners. GCO Products claims no association with, sponsorship by, or endorsement by any OEM brand mentioned herein.
