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CX300 CX300C Hydraulic Main Control Valve Assembly C0170-55083 for CASE Excavator CX300C
Product Overview
CASE CX300 Excavator Control Valve - 30Ton Class Excavator Main Hydraulic Control Assembly
Main control valve is the hydraulic core of excavator, controlling boom, arm, bucket, swing and travel functions. This valve is engineered for 30-ton heavy-duty working conditions, widely used in earthwork, quarry operations, and hammer work applications.
Available Options
Used Original Valve: Good second-hand condition, no cylinder boring, low spool wear, pressure tested, no internal leakage, no boom dropping
Remanufactured Valve: New seals, new relief valves, spool grinded, pressure calibrated before shipment
Maintenance & Replacement Procedure
Release hydraulic system pressure: Turn off engine and pull all operating levers several times to release residual pressure. Disconnect power supply for safety.
Remove distribution valve: Gradually remove hydraulic lines and mark them to avoid wrong connections. Remove fixing bolts and carefully extract the distribution valve.
Check installation location: Clean the installation area to prevent impurities from entering the hydraulic system. Check pipes and joints for damage or leaks.
Install new distribution valve: Connect hydraulic pipes according to original configuration. Replace sealing rings to ensure proper sealing. Tighten fixing bolts securely.
Fill hydraulic oil: Check hydraulic oil level and add if necessary. Start engine and run at idle speed while checking for leaks.
About Xinfeng Machinery (XF) Parts
Excavator Spare Parts Specialist
Swing Motor
Travel Motor
Fan Motor
Swing Gearbox
Travel Gearbox
Relief Valve
Gear Pump
Electrical Parts
Distribution Valve
Engine Assembly
Final Drive Assy
Hydraulic Pump
Product Advantages
Warehouse & Packaging
Frequently Asked Questions
How to quickly and accurately buy products I need?
Provide the original parts number to us to check.
How long have you been in the excavator parts business?
We have been engaged in excavator parts since 1998.
If I don't know the part number, what should I do?
Please send us size and pictures of old products.
What is the warranty of the products?
The warranty is 6/12 months based on the specific product.
How long is your delivery time?
Normal delivery time is 3-5 days for stock products after payment. For non-stock items, we will inform you of the required time.
Which shipping terms can you supply?
By sea, air, or by express (DHL, FedEx, TNT, UPS, EMS).
What is your MOQ?
Small orders and sample orders are acceptable.
Do you have any After-Sales service?
Yes! Our after-sales service is available.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Agent,Trading Company,Seller
Year Established:
1998
Total Annual:
500000-1000000
Employee Number:
50~80
Ecer Certification：
Verified Supplier
About Xinfeng Machinery (XF) parts:
Xinfeng Machinery Parts Company was established in 1998. It is a professional team composed of high-quality technical personnel integrating production, maintenance, sales, and service. It is committed to providing customers with high-quality and effic... About Xinfeng Machinery (XF) parts:
Xinfeng Machinery Parts Company was established in 1998. It is a professional team composed of high-quality technical personnel integrating production, maintenance, sales, and service. It is committed to providing customers with high-quality and effic...
