Double Lock

The new standard for safety in hydraulic quickcouplers

The new Double Lock safety standard ensures increased work safety on construction sites.
The ingenious system prevents the attachment from falling off in a purely mechanical manner in the event
of incorrect locking. A safety claw fitted in the middle between the coupling claws encloses the coupling
shaft in a form-fitting manner immediately after the lock is actuated and prevents the attachment from being
completely released in any position. The new, revised indicator pin provides information about the position
of the locking pins at any time.

Safety features of the Double Lock quickcoupler

purely mechanical fall protection
- prevents the attachment from falling off
  in case of incorrect locking
- robust, wear resistent
- service friendly
new indicator pins
- as indicator for the position of the locking pins

EuroTest certified
BG Bau eligible
surpasses all safety standards
(EN474, ISO13031)

pick-up as usual for locking

possibility of unintentional
false locking

DL safety claw prevents falling off
of the attachment

attachment secure in every
position of the bucket cylinder

Double Lock - how it works

locking pins retracted,
safety claw Double Lock open

locking pins extended,
safety claw Double Lock closed

- optical locking indicator,
  pin extended

- safety claw
  open

- optical locking indicator,
  pin retracted

- safety claw
  closed

unlocked

locked

Double advantage - new housing generation

Optimized housing for all Double Lock quickcouplers with full compatibility

In the course of the Double Lock development, all housings were optimized in terms of their pick-up and
wear behavior and compact design, and some of the locking mechanisms were newly developed.

New housing features of the Double Lock quickcouplers

wider coupling claws > more support surface > less wear
optimized claw geometry > easier pick-up of attachments
compatible with existing Lehnhoff adapters

example HS 08 (old)

HS 08 DL (NEW)

support surface + 70%

Features HS10 - HS25 / HS10V - HS21V (VL100 - VL250)

new, lower construction > more compact addition of rotator / tiltrotator possible
housing cover strengthened and safe
new engineered locking mechanism
new emergency opening mechanism

example HS 10 DL

- indicator pin

- wider pick-up claws
  with optimized
  engagement procedure

- new lower construction
  without the typical „hump“

Overview Double Lock quickcouplers

quickcoupler hydraulic	HS 01 DL	HS 03 DL	HS 08 DL	HS 10 DL	HS 21 DL	HS 25 DL
excavator class	0,5 - 1,9 t	2,0 - 6,0 t	6,1 - 12 t	12 - 19 t	19 - 28 t	28 - 38 t
length (mm)	235	295	400	520	545	545
width (mm)	180	200	290	395	495	600
weight ca. (kg)	15	30	85	170	270	310
adapter	SW 01	SW 03	SW 08	SW 10	SW 21/25	SW 21/25
coupling shaft Ø (mm)	40	50	60	70	80	80
unlocking pressure min. (bar)	130	160	160	160	180	180
load hook load capacity	1 t	3 t	3 t / 5 t	8 t	10 t	10 t
wider support surface	+ 50%	+ 20%	+ 70%	+ 30%	+ 10%	+ 20%

Overview Double Lock quickcouplers

quickcoupler fully hydraulic	HS10V DL (VL100 DL)	HS21V DL (VL 210 DL)	HS25V DL (VL 250 DL)
excavator class	12 - 19 t	19 - 28 t	28 - 38 t
length (mm)	520	ca. 960	ca. 1020
width (mm)	395	600	710
weight ca. (kg)	270	370	490
adapter	SW 10	SW 21/25	SW 21/25
coupling shaft Ø (mm)	70	80	80
unlocking pressure min. (bar)	160	180	180
load hook load capacity	2x 8 t	2x 10 t	2x 18 t
wider support surface	+ 30%	+ 10%	+ 20%

Double Lock