Idler Pully Zaxis 650/850
Product Specifications
| Brand | Compatible Model(s) | OEM Part Number | GCO Code | Part Type | Availability |
|---|---|---|---|---|---|
| Hitachi | ZAXIS 650/850 | 1136631220 + 1136603390 | F12.12 | TENSION PULLY / PULLY / FAN DRIVE ASSEMBLY | ✓ In Stock |
Product Description
OEM Part Numbers: 1136631220 + 1136603390
| Machine Model | Type | Part Number |
|---|---|---|
| ZAXIS 650 | 1136631220 + 1136603390 | |
| 850 | 1136631220 + 1136603390 |
Designed for the ZAXIS 650/850, the 1136631220 + 1136603390 idler pully zaxis 650/850 maintains belt alignment and tension across the engine accessory drive system, ensuring consistent performance of all belt-driven components. A worn or seized pulley causes belt slip, abnormal squealing noise, accessory failure, and potential belt breakage — leaving critical engine accessories without drive power. Manufactured to OEM reference 1136631220 + 1136603390 for correct belt alignment and direct installation on the ZAXIS 650/850.
Key Features:
- Belt Drive Efficiency: Minimises belt wear and slip through precisely machined drive surfaces and correct diameter.
- OEM Specification: Built to reference 1136631220 + 1136603390 for direct, alignment-accurate fitment on the ZAXIS 650/850.
- Accessory System Protection: Prevents belt failure and accessory loss caused by worn, seized, or misaligned pulleys.
The 1136631220 + 1136603390 idler pully zaxis 650/850 is a critical accessory drive component for maintaining belt performance and engine system reliability on the ZAXIS 650/850.
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.
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