I. Product Overview
This product series comprises Danfoss (formerly Sauer-Danfoss) 42 Series EDC (Electric Displacement Control) proportional servo valves—the core components of displacement control systems for Danfoss S42 hydrostatic transmissions and K3V/K5V series hydraulic pumps.
Product lineup overview:
KVME11201: 42 Series EDC proportional servo valve with MS connector (DE1A2)
KVME11204: 42 Series EDC proportional servo valve, material number 4510048, corresponding to Bobcat equipment material number 6678339
KVME series EDC servo valves precisely regulate spool displacement via electrical control signals, achieving continuous proportional control of hydraulic pump displacement. These products are standard control components for Danfoss 42 Series axial piston pumps designed for closed-circuit applications.
Manufactured to strict Danfoss OEM specifications, all products offer 100% direct interchangeability with original parts—no modifications required for installation. Every unit undergoes 100% application-condition simulation testing—comprehensive verification of pressure, flow, response characteristics, and leakage on dedicated test benches against published specifications. Perfect OEM replacement for Danfoss/Sauer-Danfoss original parts, ideal for hydraulic system repairs and preventive maintenance.
II. Technical Specifications
KVME11201 – 42 Series EDC Proportional Servo Valve
Model: KVME11201
Brand: Danfoss (formerly Sauer-Danfoss)
Product Series: EDC 42 Serie
Product Type: Proportional servo valve (Servovalve)
Compatible System: S42 hydrostatic transmission
Connection: MS connector (DE1A2)
Weight: Approx. 1.0 kg
Control Method: Proportional electric displacement control
Country of Origin: USA
KVME11204 – 42 Series EDC Proportional Servo Valve (p/n 4510048)
Model: KVME11204
Brand: Danfoss (formerly Sauer-Danfoss)
Product Series: 42 Series EDC
Product Type: Proportional servo valve
Material Number: 4510048
Corresponding Bobcat Material Number: 6678339
Compatible System: S42 hydrostatic transmission
Connector: 4-pin, mounting bolt M6×60
Weight: 4.16 – 4.57 kg
Control Method: Proportional electric displacement control
Country of Origin: USA
III. Key Technical Advantages
1. Precision Electro-Hydraulic Proportional Control Technology
KVME11201 and KVME11204 belong to the Danfoss 42 Series EDC proportional servo valve platform, precisely regulating spool displacement via electrical control signals to achieve continuous proportional control of hydraulic pump displacement. Unlike traditional on/off control, proportional control enables stepless adjustment from zero to maximum flow—significantly improving operational precision and energy efficiency.
2. 100% Direct Interchangeability & OEM-Standard Manufacturing
All models are manufactured to strict Danfoss/Sauer-Danfoss OEM specifications, ensuring 100% mechanical and hydraulic interchangeability with original parts. KVME11204 also corresponds to Bobcat equipment material number 6678339, enabling direct use in Bobcat compact loader hydraulic control systems.
3. Dedicated Design for 42 Series Axial Piston Pumps
KVME series EDC servo valves are specifically designed for Danfoss 42 Series axial piston pumps—servo-controlled axial piston pumps purpose-built for closed-circuit applications. The EDC control scheme employs a two-stage control structure, regulating pump displacement via DC input current.
4. Standardized Connectors for Easy Installation
5. Broad Industrial Compatibility
KVME series EDC servo valves are compatible not only with Danfoss S42 hydrostatic transmissions but also with K3V/K5V series hydraulic pump displacement control systems. Additionally, these products are associated with Danfoss M46 series hydraulic motor/pump identification codes such as M46-2773, forming a complete control solution for Danfoss closed-circuit hydraulic systems.
IV. Application Areas
This EDC proportional servo valve series is specifically designed for variable pump electric displacement control in closed-circuit hydrostatic transmission systems, compatible with the following equipment types and hydraulic systems:
Bobcat Compact Loaders: KVME11204 corresponds to Bobcat material number 6678339 for Bobcat equipment hydraulic control systems
Construction Equipment Hydraulics: Excavators, wheel loaders, bulldozers—electric displacement control for K3V/K5V series main pumps
Hydrostatic Drive Equipment: S42 hydrostatic transmissions—the primary application for KVME series EDC servo valves
Road Construction & Compaction Equipment: Rollers, pavers
Material Handling Equipment: Forklifts, telescopic handlers
Agricultural Machinery: Large combine harvesters, tractors—hydrostatic drive systems
Mining & Underground Equipment: Mining trucks, LHD loaders
Typical circuit applications include: variable pump electric displacement control (EDC) , pump outlet pressure closed-loop control.
V. Expert Maintenance Tips
1. Verify Model & Material Number Matching (★★★★★)
KVME11201: MS connector (DE1A2)
KVME11204: Material number 4510048, corresponding to Bobcat 6678339
Confirm the equipment’s original part number and material number before installation to ensure correct selection.
2. Oil Cleanliness Management (★★★★★)
EDC servo valves contain spool and pilot structures that are highly sensitive to oil contamination. Maintain system oil cleanliness at ISO 4406 16/14/12 or better. Use 10μm or higher-precision return filters and inspect filter elements regularly.
3. Electrical Connection Verification
KVME11201: MS connector (DE1A2)
KVME11204: 4-pin connector, mounting bolts M6×60
Control signals are sensitive to electromagnetic interference—use shielded twisted-pair cables for control wiring, with shield grounded at one end
4. Installation Torque Specifications
When mounting EDC servo valves to the pump body, tighten mounting bolts to Danfoss recommended torque (M6 bolts: 10-12 Nm reference). Excessive torque may deform the valve body and affect internal spool movement; insufficient torque may cause seal failure and external leakage.
5. Storage Environment
Recommended storage temperature: -40°C to +85°C. Avoid impact loads on the valve body during installation. Handle with care to prevent drop damage to valve components.
