Lehnhoff Fully Automatic Quick Coupler | SQ70V-55V
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Lehnhoff SQ70V-55V Fully Automatic Quick Coupler
The Lehnhoff SQ70V-55V fully automatic quick coupler is designed for 18–32 ton excavators operating in demolition, quarry, utility construction, excavation, recycling, and heavy construction applications. Built around the proven Lehnhoff S-standard interface, the SQ70V-55V allows operators to quickly change hydraulic and mechanical attachments directly from the cab while improving machine productivity and reducing downtime.
The SQ70V-55V combines increased coupler width, high-flow hydraulic valve technology, and advanced safety monitoring to support demanding hydraulic attachment applications while maintaining excavator performance and attachment versatility.
Lehnhoff SQ70V-55V Features
The SQ70V-55V is engineered to improve excavator versatility, hydraulic efficiency, and operator safety for demanding attachment applications.
Key Features
- Fully automatic hydraulic and mechanical attachment changes directly from the operator cab.
- S-standard symmetrical quick coupler system supports multiple attachment positions.
- Short-stroke hydraulic valve technology delivers high oil flow with reduced pressure loss.
- Integrated Lehnhoff Safety Control (LSC) monitors secure attachment locking status.
- Wider coupler design supports larger attachment compatibility.
- Protected hydraulic valve blocks improve durability in harsh jobsite environments.
- Supports fast switching between breakers, grapples, buckets, compactors, shears, and hydraulic tools.
Built for Heavy-Duty Productivity
The Lehnhoff SQ70V-55V helps reduce attachment swap downtime while improving excavator utilization throughout demanding workdays. Operators can quickly transition between hydraulic and mechanical attachments without manually handling hydraulic hoses.
Common Applications
The Lehnhoff SQ70V-55V quick coupler is commonly used on mid-size and larger excavators operating in demanding construction, demolition, and quarry applications where fast attachment changes are critical.
Demolition
Quickly switch between breakers, grapples, pulverizers, buckets, and shears during demolition projects.
Utility Construction
Support trenching, underground utility installation, and infrastructure work with multiple attachments.
Excavation
Improve excavator versatility for grading, trenching, earthmoving, and site development operations.
Quarry & Aggregate
Support hydraulic hammer and bucket changes for demanding rock and aggregate applications.
Recycling
Increase productivity during material sorting, concrete processing, and scrap handling operations.
Heavy Construction
Reduce machine downtime and improve attachment flexibility across demanding construction projects.
Lehnhoff SQ70V-55V Specifications
Compare the core operating specifications for the Lehnhoff SQ70V-55V fully automatic quick coupler.
| Specification | SQ70V-55V |
|---|---|
| Excavator Class | 18-32 tons |
| Coupling Shaft Diameter | 2.76 in |
| Axle Distance | 23.62 in |
| Width | 21.65 in |
| Approximate Weight | 705 lbs |
| Valve Configuration | 2xKV1 / 2xKV4 / 1xKV3 |
| Recommended Komatsu Excavators | PC170 - PC290 |
Why Choose the SQ70V-55V?
The SQ70V-55V combines fully automatic hydraulic coupling technology with a wider quick coupler design for improved excavator productivity and attachment flexibility. The integrated hydraulic valve system allows operators to connect hydraulic attachments without manually handling hoses while helping reduce downtime between tasks.
Need Compatibility Assistance?
Send us your excavator make, model, hydraulic specifications, attachment requirements, and application details. Our team can help confirm compatibility for the Lehnhoff SQ70V-55V quick coupler system.
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