Description
456-1837 Control Valve Assembly Overview
The 456-1837 Control Valve assembly manufactured by Tatan is a 9-spool hydraulic directional control block belonging to our Main Control Valve Assembly classification. Engineered specifically for Caterpillar 308, 308E2 CR, 308D CR, and 308C CR 8-ton compact excavators, swapping to a complete 456-1837 Control Valve unit eliminates hydraulic cylinder drifting, sluggish boom hoist response, and compound movement lag under demanding jobsite operations.
Constructed from high-tensile alloy cast iron with an integrated compact sectional design, this assembly houses precision-ground spools with micro-tolerances under 0.003 mm to handle flow discharges from Cat variable displacement pumps. Pre-fitted with pilot-operated pressure relief valves, a dozer blade spool, and load-holding checks, it ensures exact flow division between implement, swing, and travel circuits.
Key Attributes & Parameters for 456-1837 Control Valve
| Product Category | Main Control Valve Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | Cat Compact 9-Spool Load-Sensing Control Valve | Brand Name | Tatan |
| Compatible Equipment | Caterpillar 308 | 308E2 CR | 308D CR | 308C CR | OEM Part Number | 456-1837 / 479-0570 / 332-7934 |
| Main Relief Pressure | 28.0 MPa (280 Bar / 4060 PSI) | Port Overload Relief | 30.0 – 31.5 MPa (300 – 315 Bar / 4568 PSI) |
| Spool Bore Clearance | < 0.003 mm Precision Lapped Fit | Integrated Circuits | Boom Drift Reduction, Blade, Boom Swing, Aux |
| Machinery Test Report | Provided (100% Bench Pressure Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Body Metallurgy | High-Tensile Alloy Cast Iron Block | Place of Origin | Guangdong, China |
| Quality Status | 100% Brand New Control Valve Unit | Packaging | Export Reinforced Wooden Box Packaging |
Supported Machinery Brands & Control Valve Coverage
In addition to Caterpillar, Tatan manufactures replacement complete main control valves, hydraulic manifolds, and spool cartridges for leading machinery brands:
Application Scenarios & Buyer Value
When resolving hydraulic distribution and control faults with our 456-1837 Control Valve, workshops and equipment contractors secure tangible operational benefits:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Cat 308 Valve Bank Replacement | Swapping to the 456-1837 Control Valve completely eliminates machine downtime caused by internal spool scoring and housing micro-cracks under 8-ton working loads. |
| Hydraulic Service Workshops | Avoids the high cost and failure rate of line-honing worn compact valve bodies and fitting oversized spools that cause ongoing leakage comebacks. |
| Utility & Earthmoving Contractors | Restores full 28.0 MPa digging breakout force and smooth compound boom-arm actions without engine lugging down under heavy bucket bites. |
| Global Heavy Machinery Stockists | Pre-calibrated, export-ready inventory ready for immediate shipment to international contractors operating classic Cat mini excavators. |
456-1837 Control Valve OEM Diagnostic Guide
Use this technical diagnostic guide to identify hydraulic control circuit faults on your Caterpillar 308 excavator:
| Hydraulic Circuit Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Boom drops or arm automatically drifts under load | Internal seal deterioration on the boom drift reduction check valve poppet seat, or excessive spool-to-bore clearance bypassing circuit oil to tank. | Replace with a complete factory-tested 456-1837 Control Valve assembly. |
| 2. Dozer blade or auxiliary breaker action moves slowly | Port overload relief valve spring fatigue or contaminated poppet seat cracking below rated working pressure (< 24.0 MPa). | Clean or replace individual overload relief cartridges or swap to a pre-calibrated complete valve bank. |
| 3. Joystick feels heavy or hydraulic spool sticks in stroke | Particulate contamination scratching spool lands, uneven mounting bolt torque warping the casting, or varnished pilot end caps under high oil temperatures. | Flush hydraulic oil gallery, replace return line filters, and install a brand new valve bank with specified torque settings. |
| 4. Machine veers off track during simultaneous digging and travel | Travel straight spool failure or sticking pilot confluence check valve preventing balanced pump flow distribution. | Inspect pilot line pressure (3.9 MPa) and replace with a pre-adjusted complete valve assembly. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan main control valve assembly is preserved with anti-corrosion fluid, capped with steel threaded plugs, sealed in heavy waterproof film, and bolted inside an export-grade reinforced wooden crate.
✈️ Express Air Courier
Partnered with DHL, FedEx, UPS, and TNT for 3-7 day express door-to-door delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL ocean container shipping for heavy control valves and bulk fleet inventory.
📦 Export Wooden Cases
Fumigated solid wooden boxes with custom high-density foam inserts to prevent shipping shock.
Quality Control & International Certificates
Tatan hydraulic components are manufactured under ISO 9001 certified quality control systems and strictly comply with CE industrial pressure equipment safety directives.
456-1837 Control Valve FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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