Relief Valve for Komatsu BREAKER PC 71 Excavator | Also Fits 130
Product Specifications
| Brand | Compatible Model(s) | OEM Part Number | Part Type | Availability |
|---|---|---|---|---|
| Komatsu | BREAKER PC 71/130 | 709-70-74700 | RELIEF VALVE MRV / SWING MOTOR / TRAVEL MOTOR | ✓ In Stock |
Product Description
OEM Part Numbers: 709-70-74700
| Machine Model | Type | Part Number |
|---|---|---|
| BREAKER PC 71 | Excavator | 709-70-74700 |
| 130 | 709-70-74700 |
The 709-70-74700 relief valve breaker pc 71/130 is a precision hydraulic flow control component for the BREAKER PC 71/130, regulating fluid direction and maintaining consistent circuit pressure throughout the hydraulic system. Valve failure leads to hydraulic instability, uncontrolled movement, and pressure loss — conditions that are hazardous to operators and damaging to downstream hydraulic components. Engineered to OEM standard 709-70-74700 for precise installation and reliable hydraulic control on the BREAKER PC 71/130.
Key Features:
- Precise Flow Control: Regulates hydraulic fluid direction and pressure for safe, controlled machine operation.
- OEM Grade Fitment: Manufactured to specification 709-70-74700 for direct installation on the BREAKER PC 71/130 with no hydraulic adjustments required.
- Heavy-Duty Pressure Rating: Built to withstand the high-pressure hydraulic cycles of continuous heavy excavation and lifting work.
The 709-70-74700 relief valve breaker pc 71/130 ensures reliable hydraulic flow control and system pressure stability on the BREAKER PC 71/130.
What Does This Relief Valve Mrv / Swing Motor / Travel Motor Do?
The main relief valve (MRV) limits maximum circuit pressure to protect the hydraulic system. Swing and travel motors convert hydraulic flow into rotary mechanical motion to drive the machine's upper structure rotation and undercarriage movement.
Possible Relief Valve Mrv / Swing Motor / Travel Motor Problem Symptoms
If your machine is showing any of the following, a faulty relief valve mrv / swing motor / travel motor may be the cause:
- Machine unable to swing or travel in one or both directions
- Weak or significantly reduced swing or travel speed under working load
- Abnormal noise — grinding, whining, or knocking — from the hydraulic motor
- Hydraulic oil overheating rapidly during normal operation cycles
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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