Tension Pully for Caterpillar CAT 312D2 C4.4 Excavator | Also Fits 120K
Product Specifications
| Brand | Compatible Model(s) | OEM Part Number | GCO Code | Part Type | Availability |
|---|---|---|---|---|---|
| Caterpillar (CAT) | CAT 312D2 C4.4 / 120K | 3691255 | F10.19A | TENSION PULLY / PULLY / FAN DRIVE ASSEMBLY | ✓ In Stock |
Product Description
OEM Part Numbers: 3691255
| Machine Model | Type | Part Number |
|---|---|---|
| CAT 312D2 C4.4 | Excavator | 3691255 |
| 120K | 3691255 |
The 3691255 tension pully cat 312d2 c4.4 / 120k ensures correct belt tension and power transfer to engine accessories on the CAT 312D2 C4.4 / 120K, providing the reliable drive needed for continuous accessory operation. A damaged pulley results in belt wear, misalignment, and eventual drive failure — causing loss of power to accessories and risk of overheating or electrical system failure. Built to OEM specification 3691255 for accurate belt alignment and direct fitment on the CAT 312D2 C4.4 / 120K.
Key Features:
- Reliable Power Transfer: Efficiently transfers engine power to belt-driven accessories for uninterrupted system operation.
- Direct OEM Fitment: Built to reference 3691255 for exact installation on the CAT 312D2 C4.4 / 120K with correct alignment.
- Long Service Life: Engineered for extended durability under continuous belt drive loads and engine vibration.
The 3691255 tension pully cat 312d2 c4.4 / 120k is an essential belt drive component for sustained engine accessory operation on the CAT 312D2 C4.4 / 120K.
What Does This Tension Pully / Pully / Fan Drive Assembly Do?
The tensioner pulley maintains the correct tension on drive belts to prevent slipping and ensure efficient power transfer. The fan drive assembly regulates cooling fan speed — either mechanically via a viscous coupling or hydraulically — to match the engine cooling demand at any given load.
Possible Tension Pully / Pully / Fan Drive Assembly Problem Symptoms
If your machine is showing any of the following, a faulty tension pully / pully / fan drive assembly may be the cause:
- Belt squealing or slipping despite the belt appearing undamaged
- Tensioner pulley bearing making a grinding or rattling noise during operation
- Engine overheating due to reduced or absent cooling fan speed
- Excessive belt wear caused by the pulley not holding correct alignment or tension
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.
Related TENSION PULLY / PULLY / FAN DRIVE ASSEMBLY Parts
