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© 2022 Dehaco B.V. • Operation and maintenance manual DSG Demolition and Sorting grabs • No. DSG.2165.0001 • 31-01-2022

Dehaco B.V. • Kruisbaak 25 • 2165 AJ Lisserbroek (NL) • 

 +31 (0)252 - 41 79 50 • 

 [email protected] • www.dehaco.nl

1. Precautions and safety instructions

1. Precautions and safety instructions

1. PRECAUTIONS AND SAFETY 

INSTRUCTIONS

This chapter describes the safety regulations. These must be 
observed before installing, using or maintaining the demolition 
and sorting grab. Retain this operation and maintenance manual 
carefully for the entire life of the demolition and sorting grab.

Any person transporting, installing, removing, operating, 
maintaining, repairing, storing or disposing of this demolition and 
sorting grab must read this operation and maintenance manual.

Following these safety instructions will:
◊ 

prevent the risk of injury and fatal accidents.

◊ 

protect the demolition and sorting grab from physical 
damage.

◊ 

protect the environment against environmental damage.

All safety instructions in this manual comply with the laws and 
regulations of the European Union. Additional national/regional 
regulations must also be observed.

Outside the European Union, the demolition and sorting grab 
must be used in accordance with the laws and regulations of the 
relevant country. Observe any other more stringent regional 
regulations and legislation.

1.1 Signal words

This manual includes safety indicators that can be identified as 
follows:

 DANGER

Indicates a hazardous situation where the user can (seriously)
injure himself or (severely) damage the product.

 WARNING!

Indicates potential damage to the product should the
user not perform the procedures carefully.

 CAUTION!

Indicates a hazardous situation which, if not avoided,
may result in minor or moderate injury.

ATTENTION
The signal word ATTENTION is used to provide additional
information and alert the user to potential problems.

1.2 Qualification

Transport of the demolition and sorting grab is only permitted 
when carried out by persons who:
◊ 

are authorised to operate a forklift in accordance with 
applicable federal laws;

◊ 

are familiar with all relevant national/regional safety and 
accident prevention regulations.

◊ 

have read this operation and maintenance manual.

Installation, maintenance, storage and disposal of 
demolition and sorting grab is only permitted when carried 
out by persons who:
◊ 

are familiar with all relevant national/regional safety and 
accident prevention regulations.

◊ 

have read this operation and maintenance manual.

Operation of the demolition and sorting grab is only 
permitted when carried out by qualified excavator operators. 
Operators are qualified if they:
◊ 

have been trained in accordance with federal regulations 
to operate an excavator.

◊ 

are familiar with all relevant national/regional safety and 
accident prevention regulations.

◊ 

have read this operation and maintenance manual.

Testing the installation of the demolition and sorting grab is 
only permitted when carried out by persons authorised to do 
so.

Repair of the demolition and sorting grab is only permitted 
when carried out by persons under the instruction of Dehaco.

1.3 Intended use

The demolition and sorting grab should only be attached to an 
excavator with a capacity suitable for use with the demolition 
and sorting grab. Read the manual from the excavator 
manufacturer thoroughly before installing and using the grab. 
Follow all instructions closely.

The demolition and sorting grab may only be used for the 
following activities:
◊ 

Demolition of timber structures

◊ 

Demolition of masonry

◊ 

Sorting

◊ 

Loading work 

1.4 Use other than specified

Never use the demolition and sorting grab to:
◊ 

pull on/demolish girders, brackets, walls and partitions 
This may cause damage to the demolition and sorting 
grab and slewing ring and may also cause the excavator to 
lose its stability.

◊ 

hit or hack.

◊ 

plough debris.

◊ 

move the excavator.

◊ 

lift or transport loads with attachments.

◊ 

work underwater.

◊ 

work in explosive environments. 

1.5 Protective equipment

The personal protective equipment must comply with 
applicable health and safety regulations.

Always wear the following personal protective equipment:
◊ 

safety helmet

◊ 

safety goggles with side shields

◊ 

safety gloves

◊ 

safety shoes

◊ 

warning vest

1.6 Transport, precautions

 WARNING! 

- FALLING SUPPORT

If the load-bearing capacity of the excavator is not sufficient,
it will not be stable when using the demolition and sorting
grab. The excavator could tip over and cause injury.

Using an excavator with excessive load capacity will cause 
excessive load on the demolition and sorting grab resulting 
in increased wear.

 

Ø

Only attach the demolition and sorting grab to an 
excavator with suitable capacity.

 

Ø

The excavator must always remain stable.

 

Ø

Read this manual thoroughly before attaching and using 
the demolition and sorting grab. 

1.7 Hydraulic equipment, precautions

 WARNING! 

- EXCESSIVE HYDRAULIC PRESSURE
Excessive hydraulic pressure overloads the components
of the demolition and sorting grabs. This may cause
components to break or crack resulting in serious injury.

 

 

Ø

Insert the discharge tube of the pressure relief valve 
directly in the tank to ensure safe operation!

 

Ø

The pressure relief valve must be set to the maximum 
static pressure.

 

Ø

The settings for the pressure relief valve must be checked 
to ensure the maximum static pressure of the hydraulic 
system (see Technical Specifications section) is never 
exceeded. Apply a lead seal to the pressure relief valve.

 

Ø

Prior to the first use, the safety devices on the hydraulic 
system must be inspected for their quality, suitability 
and performance by a professional/approved inspection 
agency (CE marking, etc.)

 

Ø

When any significant changes are made to the hydraulic 
system, an acceptance inspection must be carried out in 
accordance with the relevant national safety regulations. 

 WARNING! 

- DISCHARGE OF HOT HYDRAULIC OIL
The hydraulic system is under high pressure. Hydraulic 
lines may leak or burst. Discharge of hydraulic oil can 
cause serious injury.

 

Ø

When attaching the demolition and sorting grabs, no 
hydraulic lines are to be laid through the excavator cabin

 

Ø

Only use hydraulic lines that meet with the following 
quality requirements:

 

-

For the 

Open and Close functions:

 

§

Hydraulic hoses with 4 reinforcing steel cables in 
accordance with DIN EN 8566 4SH.

 

§

Hydraulic tubes; seamless cold drawn steel 
tubes in accordance with DIN EN 10305.

 

-

For the 

Rotate function:

 

§

Hydraulic hoses with two steel braids in 
accordance with DIN EN 853 2SN.

 

§

Hydraulic tubes; seamless cold drawn steel 
tubes in accordance with DIN EN 10305. 

1.8 Consumables, precautions

 

 WARNING!

- HOT, HIGH PRESSUSE HYDRAULIC FLUID

A leak in the hydraulic system will cause hydraulic oil to spray 
out under high pressure. The oil stream can penetrate human 
skin and cause permanent injury. Hot hydraulic oil can cause 
burns.

 

Ø

Never use your hands to locate leaks.

 

Ø

Always keep your face away from a potential leak.

 

Ø

If hydraulic oil has penetrated your skin, always consult a 
physician immediately. 

 WARNING!

- SPILLED HYDRAULIC OIL

Spilled hydraulic oil can make the floor slippery causing
people to slip and resulting in injury. Hydraulic oil is
harmful to the environment and must not penetrate the
soil or reach the water table/ground water supplies.

 

Ø

Ensure no hydraulic oil is spilled.

 

Ø

When hydraulic oil has spilled, clean the floor 
immediately.

 

Ø

Observe all regulations regarding safety and 
environmental protection when using hydraulic oil.

 

WARNING!

- SKIN INFECTIONS/DISEASES CAUSED BY OIL AND GREASE

Hydraulic oil and grease can cause skin rashes (or even
eczema) if they come into contact with the skin.

 

Ø

Avoid skin contact with hydraulic oil and grease.

 

Ø

Use a suitable product to protect the skin.

 

Ø

Always wear safety gloves when working with hydraulic 
oil or grease.

 

Ø

Wash contaminated skin immediately with soap and 
water.

1.9 Explosions and fire, precaustions

 DANGER! 

- EXPLOSION AND FIRE

Explosions cause serious injury or can result in death. 
Explosives touched by the demolition and sorting grab could 
cause an explosion.

 

Ø

Never use the demolition and sorting grab in the 
immediate vicinity of explosives.

 

Ø

Ensure no explosives are hidden in the concrete.

 

Ø

Identify the location of the gas lines on drawings of the 

Summary of Contents for DSG

Page 1: ...DSG Hydraulic demolition and sorting grabs Operation and maintenance manual DSG V2 0 31 01 2022 English ...

Page 2: ...tems and asbestos tools also contribute to Dehaco s unique market position Dehaco is a market leader in the Benelux in the field of asbestos remediation products dust control products and hydraulic equipment units for the demolition sector Dealers Dehaco works with a network of global dealers for the sale of demolition equipment asbestos removal and dust control products These dealers are also qua...

Page 3: ... 3 TRANSPORT 13 3 2 Transport with a fork lift truck 13 3 3 Transport by lorry 13 4 INSTALLATION 14 4 1 Hydraulic fluids 14 4 2 Attaching to the excavator 15 4 3 Detaching the demolition and sorting grab from the excavat 16 4 4 Detaching the adapter plate 17 5 OPERATION 18 5 1 Preparations for starting 18 5 2 Switching the demolition and sorting grab on and off 18 5 3 Function test 18 5 4 Proper u...

Page 4: ...must comply with applicable health and safety regulations Always wear the following personal protective equipment safety helmet safety goggles with side shields safety gloves safety shoes warning vest 1 6 Transport precautions WARNING FALLING SUPPORT If the load bearing capacity of the excavator is not sufficient it will not be stable when using the demolition and sorting grab The excavator could ...

Page 5: ...ger zone Ø Stop the works immediately when someone enters the danger zone Ø Close the windscreen and side windows of the excavator cabin 1 12 Emissions precautions WARNING LUNG DISEASES CAUSED BY DUST Using the demolition and sorting grab may release dust Dust produced during the demolition moving sorting of rocks concrete and asphalt or other similar materials can lead to silicosis also called bl...

Page 6: ...n The demolition and sorting grab is opened by operating a foot pedal or joystick in the excavator cabin Oil is brought to the cylinders through line A causing the piston rod to retract and the shells to open Rotate Activate the function Rotate grab This carries hydraulic oil to the demolition and sorting grab motor and activates the rotation function To achieve infinite rotation the demolition an...

Page 7: ...hines with suitable capacity to transport the demolition and sorting grab Ø Ensure no persons are in the vicinity of the demolition and sorting grab Transport the demolition and sorting grab with the shells open The demolition and sorting grab is more stable when being transported with the shells open There is also less oil in the demolition and sorting grab when the shells are open As a result le...

Page 8: ...mix mineral oil with non mineral oil Even small traces of mineral oil mixed with non mineral oil may result in damage to both the demolition and sorting grab as well as the excavator Non mineral oil loses its biodegradability Ø Use only one type of hydraulic oil If non mineral oil is used the brand must be indicated when the demolition and sorting grab is brought in for repair To protect the envir...

Page 9: ...ate function to the arm carefully to prevent pinching WARNING THRASHING HYDRAULIC HOSES Hydraulic hoses under pressure will thrash about if a bolt connection becomes loose or detached This can cause serious injury Ø Tighten the mounting screws to the correct torque 4 3 Detaching the demolition and sorting grab from the excavator WARNING UNEXPECTED MOVEMENTS Sudden movements by the excavator can ca...

Page 10: ...cavator cabin Precautions for starting the demolition and sorting grab Ensure the demolition and sorting grab is complete Inspect the demolition and sorting grab and adapter plate for cracks Ensure there are no leaks from the hydraulic lines The preparations required prior to starting the demolition and sorting grab depend on the ambient temperature Ambient temperatures below 0 C see Low ambient t...

Page 11: ...gs vertically Close open and rotate the demolition and sorting grab while the excavator is warming up ATTENTION DAMAGE TO HYDRAULIC COMPONENTS Hot hydraulic oil will damage a cold hydraulic demolition and sorting grab Do not fill the hydraulic system with hot hydraulic oil The temperature of the hydraulic oil from the excavator must be at least 0 C Start the demolition and sorting grab when the te...

Page 12: ...orting grab while operating the grab This can cause severe damage to the demolition and sorting grab 5 5 9 Extending the bucket cylinder Never extend the cylinder while operating the grab This action will make the demolition and sorting grab unusable 5 5 10 Pulling Never use the demolition and sorting grab to pull on support beams supports or walls This could result in severe damage Moreover the e...

Page 13: ...tings become very hot during operation Contact with these components can cause burns Ø Never touch hot components Ø If works need to be completed on or near hot components wait for them to cool down first WARNING UNINTENTIONAL STARTING Unintentional starting of the excavator demolition and sorting grab can lead to serious injury Ø Follow the instructions to avoid unintentional starting WARNING UNE...

Page 14: ...for the cylinders 6 1 1 Lubrication schedule 6 1 2 Changing replacing wear blades 1 Ensure the nut is installed with the conical side on the inside of the shell 2 Bolts must be tightened to the torque indicated on the table on page 27 1 Lubricating pivot points 1 1 x per 8 operating hours 2 Lubricating pivot points 1 1 x per 8 operating hours 3 Lubricating slewing ring 1 1 x per 8 operating hours ...

Page 15: ... operating pressure Workshop or Dehaco dealer service technician Cause Solution By who Rotary motor gear unit slewing ring rotation transmission defect Inspect the rotary motor gear unit slewing ring rotation transmission and replace the defective parts Workshop or Dehaco dealer service technician Cause Solution By who The oil level in the tank is too low Check the oil level and top up if necessar...

Page 16: ...ng grab WARNING RISK OF TIPPING If the demolition and sorting grab tips over while stored this can lead to serious injury and property damage Ø Preferably position the demolition and sorting grab on square wooden beams or a pallet Ensure the horizontal surface is level 9 1 1 Procedure for storage 1 Open the shells of the demolition and sorting grab The demolition and sorting grab is more stable wh...

Page 17: ...00 F DSG150 F DSG250 F DSG400 F DSG450 F DSG452 F DSG502 F DSG603 F Technical specs Excavator weight 1 t 0 7 1 2 1 2 1 2 3 2 5 4 4 6 5 9 6 11 7 12 10 16 Weight standard 2 kg 50 65 100 200 280 330 340 500 600 Cylinders 1 1 1 1 1 1 1 1 1 Operating pressure bar 300 300 300 300 300 300 300 350 350 Oil flow l min 15 20 25 35 40 50 50 90 100 Shell width A mm 300 350 450 500 600 700 700 600 800 Height op...

Page 18: ...osed E mm 430 500 545 785 780 850 890 885 1 055 1 070 1 170 1 180 1 170 1 180 1 175 1 175 1 300 1 300 Capacity l 30 40 70 100 100 150 200 200 300 400 500 500 600 600 700 700 750 750 Closing force kN 6 7 15 20 20 23 24 24 30 35 46 46 46 46 46 46 55 55 Article number 1210 0018 1210 0001 1210 0006 1210 0010 1210 0088 1210 0014 1210 0016 1210 0062 1210 0037 1210 0055 1210 0057 1210 0086 1210 0058 1210...

Page 19: ... Lisserbroek NL 31 0 252 41 79 50 info dehaco nl www dehaco nl Dehaco B V Headquarters Kruisbaak 25 2165 AJ Lisserbroek The Netherlands Raamsdonksveer Steurweg 1 4941 VP Raamsdonksveer The Netherlands T E www dehaco nl 31 0 252 41 79 50 info dehaco nl ...

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