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Variolock VL 100-250

Fully hydraulic quickcoupler for hydraulic excavators

Each attachment safely in use, in just seconds
The fully hydraulic Variolock energy circuit coupling system makes changing all attachments easy, safe and quick. The driver can comfortably change all tools including the hydraulic connection at the press of a button from the cab, without having to leave the cab and without having to depend on other personnel.

Very economical thanks to time and cost savings

  • More effective working: tool change makes sense also with short work cycles
  • More safety and convenience for the driver
  • Cost reduction due to preservation of machine and attachments
  • Prevention of hose ruptures
  • Less contamination of the hydraulic system, environmentally friendly

    • Optimised installation: hoses already installed up to SAE block flange

    • 2 load hooks as standard

    • Quickcoupler with integrated valve block (S- block)

    • Valve block in the adapter of the attachment (A-block)

Locking process

When locking the quickcoupler and theattachment with the adapter, the valvesare  opened mechanically.The extremely short stroke of 0 - 4.8 mmallows a full flow of oil immediately. The quickcoupler is always safe andlocked without backlash through permanent pressurisation. 

S-Block: Ventilblock im Schnellwechsler

  • Flexibly and centrally stored on the underside in the quickcoupler
  • With five short stroke valves
  • Including leakage oil lines
  • Integrated hydraulic tension support ensures a solid hydraulic
    connection between S-block and A-block


A-block: valve block in the attachment

  • Mounted in the attachment adapter
  • Short stroke valves are flush with the block surface and thus easy to maintain
  • Valves optimally adapted to the respective tool:
    Two valves: e.g. tilt bucket, hammer
    Three valves: e.g. drum cutter, rigid compactor
    Four valves: e.g. rotatable grapple
    Five valves: e.g. rotatable compactor


Tilt bucket:

2 valves

(3 dummies)


Sorting grab:

4 valves

(1 dummy)


Hydraulic hammer:

2 valves

(3 dummies)


Rotatable compactor:

5 valves

(no dummy)



Drum cutter:

3 valves

(2 dummies)



Backhoe bucket:

no valves

(only valve block protection)

Five short stroke valves enable all functions of all tools, including the leakage oil line

Technical data Variolock VL 100-250
Quickcoupler VL 100-2 VL 210-2 VL 250-2
Excavator class 10 - 19 t 18 - 28 t 26 - 40 t
Length (mm) 520 545 545
Width (mm) 395 495 600
Weight approx. (kg) 220 350 550
Compatible with adapter SW 10 SW 21/25 SW 21/25
Locking /unlocking pressure min. (bar)      
Valves 3 x KV1, 2 x KV3 2 x KV1, 1 x KV3, 2 x KV4 2 x KV1, 1 x KV3, 2 x KV4
Load hooks load capacity 2 x 8 t 2 x 10 t 2 x 18 t

Variolock VL 100-2 / VL210-2 / VL 250-2 operating modes

© 2021 Lehnhoff Hartstahl GmbH

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