4 Boom extension

4.1 Components and Identification

4.1.1 Identification

The boom extension consists of the 22 m (72 ft) two-stage swing-away lattice extension and two boom extension sections.

The boom extension is designed for the truck crane with which it was delivered. The parts of the boom extension belonging to the truck crane have the same serial number as the truck crane. All components are identified by serial number.

Both parts of the boom extension are identified by a serial number.

SDanger of malfunction and damage!

Operate the truck crane only with those parts of the boom extension which have the same serial number as the crane. The SLI is set only for this boom extension. This means that you can prevent malfunctions and damage.

HFor technical reasons the truck crane may be adjusted only with one boom extension.

If you wish to use the boom extension on several GROVE truck cranes, the parts of the boom extension must be adjusted for these cranes and labelled with all of the respective serial numbers.

SDanger of damage if the boom extension has not been adjusted or if it has been incorrectly adjusted!

Have the matching of the boom extension carried out only by GROVE Customer Support at the particular location!

Serial numbers on the 8 m (26 ft) sections

On the 8 m (26 ft) sections the serial number (1) is at the front on a plate.

4.2 Attachment points

GThis section shows the slinging points of the 8 m sections. Sling the sections to these slinging points only, as they then automatically have the correct centre of gravity. Only use sling gear with sufficient load bearing capacity; weight of individual parts à Boom extension, p.2-1 and p.2-3.

The 8 m (26 ft) sections have two slinging points (1) (each slightly offset on each side).

4.3 Assembly H

(98

0,5m (1.6ft) 9m (30ft) part 8m (26ft) part 12,5m (41ft) part 9m (30ft) part 8m (26ft) part 8m (26ft) part m (125 ft)

The 12.5 m (41 ft) part consists of a fixed 2 m (6.6 ft) part and a luffing part 10.5 m (34 ft).

4.4 Check lists for rigging work

4.4.1 CHECK LIST: Rigging 30 m / 38 m (98 ft/125 ft) boom extension

HThis checklist is not equivalent to complete operating instructions. There are accompanying instructions which are indicated by cross-references. Observe the warning and safety information given there!

Requirements:

–The truck crane is supported or the main boom is placed on the boom support.

–An auxiliary crane must be ready.

1. Prepare the truck crane for unrigging; à Preparing the truck crane for rigging, p.4-13.

2. Install and connect hose drum for hydraulic supply (if applicable); à Installing hose drum , p.3-39.

3. If the lattice extension is folded up at the side of the main boom, remove the lattice extension: à CHECK LIST: Unrigging 30 m/38 m (98 ft / 125 ft) boom extension, p.4-10.

4. Check the transport condition of the two-stage swing-away lattice extension; à Transport condition with removed lattice extension, p.3-37.

5. Installing 8 m (26 ft) sections in front of the main boom: For 30 m (98 ft) boom extension a 8 m section For 38 m (125 ft) boom extension both 8 m sections; à Attachment points, p.4-3; à Installing/removing 8 m (26 ft) sections, p.4-14.

6. Installing folded two-stage swing-away lattice extension in front of the 8 m section; à Installing/removing two-stage swing-away lattice extension for boom extension, p.4-15.

7. Establish connection between 9 m (30 ft) and 12.5 m (41 ft) sections; à Connections in the front area, p.3-44.

8. Swing the 9 m (30 ft) section in front of the 12.5 m (41 ft) section; à Swinging the 9 m (30 ft) section in front of the 12.5m (41ft) section , p.3-62.

9. Lock the 9 m (30 ft) section in front of the 12.5 m (41 ft) section; à Connections on lattice extension, p.3-55. à Relieving the load on bearing points, p.3-53.

10. Establish hydraulic connections; à Hydraulic connection on the boom extension, p.4-16.

11. Establish electrical connections; à Electrical connection on the boom extension, p.4-19.

12. Folding out deflection sheaves on all sections; à Folding out/in the deflection sheaves on the 12.5m (41ft) section , p.3-68. à Folding out/in deflection sheaves on the 8 m (26 ft) sections, p.4-21.

13. Place hoist rope on the 9 m (30 ft) section via all deflection sheaves and the head sheave; à Placing the hoist rope , p.4-22.

14. Move anemometer (additional equipment) from the head of the main boom to the head of the 9 m (30 ft) section; à Anemometer on the lattice extension, p.3-74.

15. Move lifting limit switch from the head of the main boom to the head of the 9 m (30 ft) section; à Lifting limit switch on the lattice extension, p.3-72.

16. Reeve the hoist rope onto the hook block; à GMK 5200/6220-L operating instructions, Part 2, Chapter Rigging work, Section Reeving and unreeving the hoist rope.

17. Attach lifting limit switch weight and guide hoist rope through the weight; à GMK 5200/6220-L operating instructions, Part 2, Chapter Rigging work, Section Reeving and unreeving the hoist rope – Lifting limit switch on the main boom lifting limit switch weight

18. Enter SLI code according to Lifting capacity table for the actual rigging mode of the truck crane with the 30 m (98 ft) or 38 m (125 ft) boom extension; à Operating instructions GMK5200/6220-L , Part 2, Chapter Crane operation, Section Operation of the safe load indicator – Setting the rigging mode.

Further working steps for raising the boom; à p.3-77. Telescoping with rigged boom extension; à p.3-78.

4.4.2 CHECK LIST: Unrigging 30 m/38 m (98 ft / 125 ft) boom extension

HThis checklist is not equivalent to complete operating instructions. There are accompanying instructions which are indicated by cross-references. Observe the warning and safety information given there!

Requirements:

–The truck crane is supported or the main boom is placed on the boom support.

–An auxiliary crane must be ready.

1. Prepare the truck crane for unrigging; à Preparing the truck crane for rigging, p.4-13.

2. Fully retract and set down main boom.

3. Enter SLI code according to Lifting capacity table for the actual rigging mode of the truck crane with the 22 m (72 ft) two-stage swing-away lattice extension; à Operating instructions GMK5200/6220-L, Part 2, Chapter Crane operation , Section Operation of the safe load indicator – Setting the rigging mode.

4. Remove lifting limit switch weight and move lifting limit switch from the head of the 9 m (30 ft) section to the head of the main boom; à Lifting limit switch on the lattice extension, p.3-72.

5. Unreeve the hoist rope from the hook block; à GMK 5200/6220-L operating instructions, Part 2, Chapter Rigging work, Section Rigging work on the main boom – Reeving and unreeving the hoist rope.

6. Remove anemometer (additional equipment); à Anemometer on the lattice extension, p.3-74.

7. Disconnect the electrical connection between the 9 m (30 ft) and 12.5 m (41 ft) sections; à Electrical connection on the lattice extension, p.3-65.

8. Fold in the deflection sheaves on all sections of the boom extension; à Folding out/in the deflection sheaves on the 12.5m (41ft) section , p.3-68. à Folding out/in deflection sheaves on the 8 m (26 ft) sections, p.4-21.

9. Reel hoist rope up to the main boom head.

10. Remove locking pins between 9 m (30 ft) section and 12.5 m (41 ft) section on the left side and remove the lower pin on the right side with the head (left 2 pins, right 1 pin); à Connections on lattice extension, p.3-55. à Relieving the load on bearing points, p.3-53. à Installing/removing 8 m (26 ft) sections , p.4-14.

11. Turn 9 m (30 ft) section sideways onto the 12.5 m (41 ft) section; à Swinging the 9 m (30 ft) section in front of the 12.5m (41ft) section , p.3-62.

12. Establish connection between 9 m (30 ft) and 12.5 m (41 ft) sections; à Connections in the middle area , p.3-46.

13. Remove folded two-stage swing-away lattice extension from the 8 m (26 ft) section; à Installing/removing two-stage swing-away lattice extension for boom extension , p.4-15.

14. Remove 8 m (26 ft) sections from the main boom: With 30 m boom extension one 8 m (26 ft) section With 38 m (125 ft)boom extension both 8 m (26 ft) sections; à Attachment points , p.4-3.

15. Remove hose drum for hydraulic supply (if applicable); à Installing hose drum, p.3-39.

4.5 Description of rigging work

4.5.1 Preparing the truck crane for rigging

Requirements for rigging

The following requirements must be met before rigging of the boom extension:

–The two-stage swing-away lattice extension is attached to the side of the main boom and is in transport condition.

–The counterweight version required acc. to the Lifting capacity table for the planned operation when the lattice extension is rigged.

–The truck crane is supported with the prescribed outrigger span for the planned operation with the lattice extension according to the Lifting capacity table and is aligned horizontally.

–The main boom is completely retracted (0/0/0/0/0) and has been lowered into horizontal position.

–If the truck crane is equipped with two hoists with additional equipment, the hook block is unreeved on the hoist which is not used for working with the lattice extension.

Requirements for unrigging

Before you lower the boom extension into a horizontal position, the following requirements must be met:

–No other load is raised outside the hook block.

–The required counterweight version for operation with the rigged lattice extension according to the Lifting capacity table is rigged.

–The truck crane is supported with the outrigger span prescribed for operation with the rigged lattice extension according to the Lifting capacity table.

–The main boom is fully retracted (0/0/0/0/0).

–The lattice extension is raised completely.

–The SLI code is entered for operation with the rigged lattice extension. If these requirements are met, lowering into the horizontal position with a boom extension at a slewing range of 360° is permitted and is monitored by the SLI; à Raising the setting down the main boom with rigged lattice extension, p.3-77.

Do not override the SLI when lowering into a horizontal position!

4.5.2 Installing/removing 8 m (26 ft) sections

–When rigging the 30 m (98 ft) boom extension you must install a 8 m (26ft) section in front of the main boom head.

–When rigging the 38 m (125 ft) boom extension you must install another 8m (26ft) section in front of the 8 m section you installed first.

HAn auxiliary crane must be used to install and remove the 8 m (26ft) sections.

The securing pins (1) for the connection are in the holders on the foot of the 8 m (26ft) sections and are secured with retaining pins.

Installing 8 m sections

• Sling the 8 m section on an auxiliary crane and lift it in front of the main boom head so that the bearing points (2) and (3) align on both sides.

• Insert the securing pins on both sides into the bearing points (2) and (3).

• Secure all pins with retaining pins.

• Install the second 8 m (26ft) section for the 38 m (125ft) boom extension in the same way in front of the first 8 m section.

Removing 8 m sections

• Sling the 8 m (26ft) section on an auxiliary crane and lift it until the the load has been relieved on the bearing points (2) and (3).

• Release the pins and knock them out of the bearing points (2) and (3) on both sides.

• Insert the pins into the holders on the foot of the 8 m sections and secure them with retaining pins.

4.5.3 Installing/removing two-stage swing-away lattice extension for boom extension

This section describes the installation and removal of the folded two-stage swing-away lattice extension.

You can also install the two-stage swing-away lattice extension which has been folded in front of the other in front of a 8 m (26 ft) section (e.g. when you are changing directly from the 22 m (72 ft) two-stage swing-away lattice extension to a boom extension).

HAn auxiliary crane must be used to install and remove the two-stage swingaway lattice extension.

The securing pins (1) for the connection are in the holders on the foot of the 12.5 m (41 ft) sections and are secured with retaining pins.

Installation

• Sling the two-stage swing-away lattice extension onto an auxiliary crane; à Slinging points, p.3-9.

• Lift the two-stage swing-away lattice extension in front of the 8 m (26ft) section so that the bearing points (2) and (3) align on both sides.

• Insert the securing pins on both sides into the bearing points (2) and (3).

• Secure all the pins with retaining pins.

Removing

• Sling the two-stage swing-away lattice extension onto an auxiliary crane; à Slinging points, p.3-9.

• Lift the two-stage swing-away lattice extension until the bearing points are relieved.

• Release the pins and knock them out of the bearing points (2) and (3) on both sides.

• Insert the pins into the holders on the 12.5 m (41 ft) section and secure them with retaining pins.

4.5.4 Hydraulic connection on the boom extension

The hydraulic supply is required for derricking the lattice extension. If the hose drum has been removed, the hose drum connection on the left side of the main boom must be established first; à p.3-40.

HThe connections are made via quick couplings. Half couplings which belong together are colour coded.

Connections on the 8 m sections

At the rear of the 8 m sections there are two hydraulic hoses (1) with quick couplings. These hydraulic hoses can be connected on the main boom head or on a second 8 m (26ft) section.

For transportation the hydraulic hoses are clamped in the holders (2).

At the front of the 8 m (26ft) sections there are two quick couplings (1). Here you can connect the hydraulic hoses of the 12.5 m (41 ft) section or a second 8 m (26ft) section.

Establish hydraulic connections

Use the delivered levering tool to make the hydraulic connections; à Connecting quick couplings with levering tool, p.4-17.

For the 30 m (98ft) boom extension

• Connect the hydraulic hoses of the 8 m (26ft) section to the quick couplings on the main boom head.

• Connect the hydraulic hoses of the 12.5 m (41 ft) section to the front of the quick couplings on the 8 m (26ft) section.

For the 38 m (125ft) boom extension

• Connect the hydraulic hoses of the first 8 m (26ft) section to the quick couplings on the main boom head.

• Connect the hydraulic hoses of the second 8 m (26ft) section to the front of the quick couplings on the first 8 m (26ft) section.

• Connect the hydraulic hoses of the 12.5 m (41 ft) section to the front of the quick couplings on the second 8 m (26ft) section.

Connecting quick couplings with levering tool

A levering tool is supplied to make it easier to connect the quick couplings.

The loose half coupling (6) is pressed into the fixed half coupling (5) with the levering tool (1).

There are sleeves (4) placed on the retaining sheets of the fixed half couplings in which the levering tool is supported on the journals (3).

The two journals are offset so that the levering tool can be inserted into the sleeve on the right or left, depending on the height of the fixed half coupling.

If the position of the fixed half couplings is mixed up (e.g. the higher half coupling on the right) you can fold the rocker (2) 180° up and turn the levering tool round.

• Insert the levering tool in the sleeve (2) with a journal so that it is at the correct height for the fixed half couplings (3).

• Place the loose half coupling (4) on the fixed half coupling.

• Place the fork (5) on the loose half coupling.

• Push the lever (1) up. The loose half coupling is pressed into the fixed half coupling.

4.5.5 Electrical connection on the boom extension

This section describes the electrical connections on the 8 m (26ft) sections. To establish the electrical connection on the two-stage swing-away lattice extension à Electrical connection on the lattice extension, p.3-65.

Connections on the 8 m sections

At the rear of the 8 m (26ft) sections there is a cable with a plug (3).

You can connect the cable to the main boom head or a second 8 m (26ft) section.

For transportation the cable is wound around the holders (1) and the plug is inserted in the dummy socket (2).

At the front of the 8 m (26ft) sections there is a plug socket (1).

Here you can connect the cable of the 12.5 m (41 ft) section or a second 8 m (26ft) section.

Establishing electrical connections

For the 30 m (98ft) boom extension

• Connect the cable of the 8 m (26ft) section to the socket on the main boom head.

• Connect the cable of the 12.5 m (41 ft) section on the socket at the front of the8 m (26 ft) section.

For the 38 m (125ft) boom extension

• Connect the cable of the first 8 m (26ft) section to the socket on the main boom head.

• Connect the cable of the second 8 m (26ft) section to the socket at the front of the first 8 m (26 ft) section.

• Connect the cable of the 12.5 m (41 ft) section on the socket at the front of the second 8 m (26ft) section.

4.5.6 Folding out/in deflection sheaves on the 8 m (26 ft) sections

This section describes only the folding in and out of the deflection sheave on the 8 m sections. To fold in and out the deflection sheaves on the 12.5 m (41 ft) section; à Folding out/in the deflection sheaves on the 12.5m (41ft) section , p.3-68.

There is a deflection sheave on every 8 m section. For operation with the boom extension you must fold out the deflection sheaves on all rigged 8 m (26 ft) sections.

For transportation you must fold in the deflection sheaves.

Folding out deflection sheave

• Hold the deflection sheave by the strut (1) and pull out the pin (3).

• Fold the deflection sheave up and secure it with the pin in the bore (2).

• Secure the pin with a retaining pin.

Folding in deflection sheave

• Hold the deflection sheave by the strut (1) and pull out the pin (3).

• Fold the deflection sheave down and insert the pin in the bore (2).

• Secure the pin with a retaining pin.

4.5.7 Placing the hoist rope

GRisk of accidents due to falling parts! Always secure the hoist rope holding rollers and rods with retaining pins. This prevents elements from coming loose, falling down and injuring people.

• Remove the hoist rope holding rollers and rods (1).

• Guide the hoist rope via the deflection sheaves (5), (4), (3) and via the head sheave (2) on the 9 m (30 ft) section for both boom extensions.

• Put all hoist rope holding rollers and rods back in place and secure these with retaining pins.

Attach the hook tackle. The hoist rope may only be reeved once; à p.3-71.

4.6 Driving with rigged crane and boom extension

This section describes how to move the truck crane with an installed counterweight and rigged two-stage swing-away lattice extension on the building site.

GRisk of accidents!

It is forbidden to move the truck crane with a suspended load. Put the load down before you move the truck crane. Secure the hook block so that it cannot swing.

GRisk of overturning!

Before a rigged crane can be driven the superstructure must be locked and the slewing gear permanent brake must be engaged.

4.6.1 Driving route

The route must be a flat, even surface. The level adjustment system cannot compensate for uneven surfaces. If the surface pressure of the tyres exceeds the permissible load on the ground, the surface pressure must be increased using packing made of durable material (e.g. wooden planks).

SRisk of tyre damage!

Check the pressure in the tyres before the rigged truck crane is moved. The truck crane may only be moved if the tyres have been inflated to the required air pressure; à Operating instructions GMK5200/6220-L, Part 2, Chapter Technical information, Section Technical data – Carrier – Tyres. Do not reduce the tyre pressure!

4.6 Driving with rigged crane and boom extension

4.6.2 Rigging mode and axle loads GMK 5200

The vehicle may only be moved under certain circumstances. The main boom and the lattice extension must be moved to a specific position, depending on the installed counterweight. The tables on the following pages provide an overview of the possible settings.

SDanger of damage to the axle lines!

Always move the main boom and the lattice extension to the prescribed position before you move the rigged truck crane. The permitted loads on the axle lines are exceeded if the boom is in a position which deviates from the prescribed position.

• Set the appropriate SLI code for the rigging mode on the safe load indicator. The SLI codes are found in the Lifting capacity table.

• Move the boom into the prescribed position. The prescribed boom position can be found in the following tables.

Risk of accidents if SLI is overridden!

Always set the SLI rigging code corresponding to the current rigging mode when you derrick the main boom into the prescribed position. Do not override the SLI; the prescribed positions in the following tables all lie within the areas which are permitted according to the Lifting capacity tables. The truck crane safe load indicator does not function when the SLI is overridden!

4.6 Driving with rigged crane and boom extension

30 m (98 ft) boom extension The axle loads specified in the following tables refer to a driving mode with the basic unit and 12 t hook tackle reeved on the lattice extension, hook blocks must be unreeved.

1) Boom position at rear = 0° position, boom over rear edge, undercarriage Boom position at front = 180° position, boom over driver’s cab

Axle load front:on 1st, 2nd and 3rd axle line

4th and 5th axle line

Boom extension

4.6 Driving with rigged crane and boom extension

38 m (125 ft) boom extension The axle loads specified in the following tables refer to a driving mode with the basic unit and 12 t hook tackle reeved on the lattice extension, hook blocks must be unreeved.

1) Boom position at rear = 0° position, boom over rear edge, undercarriage Boom position at front = 180° position, boom over driver’s cab

2) Axle load front:on 1st, 2nd and 3rd axle line

4th and 5th axle line

4.6 Driving with rigged crane and boom extension

4.6.3 Rigging mode and axle loads GMK 6220-L

The vehicle may only be moved under certain circumstances. The main boom and the lattice extension must be moved to a specific position, depending on the installed counterweight. The tables on the following pages provide an overview of the possible settings.

SDanger of damage to the axle lines!

Always move the main boom and the lattice extension to the specified position before you move the rigged truck crane. The permitted loads on the axle lines are exceeded if the boom is in a position which deviates from the specified position. 11==

• Set the appropriate SLI code for the current rigging mode on the safe load indicator. The SLI code can be found in the Lifting capacity table.

• Slew the superstructure into the position required (0° to the rear or 180° to the front).

• Lock the superstructure. The Counterweight locked indicator lamp must be lit.

• Derrick the main boom to 82°.

8"0 %0 792

• Fully retract the main boom.

• Set a lattice inclination of 5°.

0° to the rear for the superstructure position

The tables on the following pages allocate a Telescoping rigging code and a Derricking rigging code for each counterweight combination to the different lattice extensions.

• Enter the Telescoping rigging code for the lattice extension currently rigged (e.g. 792 for a rigged 30 m lattice extensions and counterweight combination of 44.0 t).

HIf SLI shutdown then occurs:

–The lattice inclinations does not correspond to the specified angle, or –The current load exceed the maximum vpermitted value (e.g. a too large hook block has been reeved).

Boom extension

4.6 Driving with rigged crane and boom extension

180° to the front for the superstructure position

The tables on the following pages allocate a Telescoping rigging code and a Derricking rigging code for each counterweight combination to the different lattice extensions.

GDanger of accidents due to overridden SLI!

The position required for the main boom and lattice extension in order to move the crane is partly outside the permitted working range. You should therefore always enter the appropriate Telescoping rigging code or Derricking rigging code before carrying out the corresponding crane movements. Never override the SLI. 792

782

Telescoping the main boom

• Enter the Telescoping rigging code for the lattice extension currently rigged (e.g. 792 for a rigged 30 m lattice extensions and counterweight combination of 44.0 t).

• Telescope the main boom as required according to the following tables.

Derricking the main boom

• Enter the Derricking rigging code for the lattice extension currently rigged (e.g. 782 for a rigged 30 m lattice extensions and counterweight combination of 44.0 t).

• Derrick the main boom to the required angle according to the following tables.

30 m (98 ft) boom extension

4.6 Driving with rigged crane and boom extension

The axle loads specified in the following tables refer to a driving mode with the basic unit and 12 t hook tackle reeved on the lattice extension, hook blocks must be unreeved.

Boom extension

4.6 Driving with rigged crane and boom extension

38 m (125 ft) boom extension The axle loads specified in the following tables refer to a driving mode with the basic unit and 12 t hook tackle reeved on the lattice extension, hook blocks must be unreeved.

4.6.4 Driving the rigged crane

Engaging the slewing gear permanent brake

Retracting the outrigger

4.6 Driving with rigged crane and boom extension

Before the truck crane is moved, the superstructure must be locked to the carrier; à Operating instructions GMK5200/6220-L – Superstructure lock

!• Check that the superstructure is locked. The Counterweight locked indicator lamp must be lit.

Y• Apply the slewing gear permanent brake and switch off the Slewing function to prevent inadvertent operation. To do this push down the Slewing gear permanent brake rocker switch. The Slewing gear permanent brake applied indicator lamp lights up when the slewing gear permanent brake is applied.

HIf the crane engine stops the slewing gear permanent brake is automatically applied.

• Retract the outrigger cylinders until the wheels are just above the ground.

GRisk of overturning!

Make sure that the truck crane does not overturn when the outriggers are being retracted!

Retract all the outrigger cylinders as uniformly as possible!

Switching over the suspension locking system u• Switch the suspension locking system off. To do this push up the Suspension locking system rocker switch. The Suspension locking system indicator lamp must go out. u• Activate the suspension locking system again. To do this push down the Suspension locking system rocker switch. The Suspension locking system indicator lamp lights up when the suspension system is locked.

• Retract the outrigger cylinders until the truck crane is approximately at on-the-road level.

• Continue to retract the outrigger cylinders.

GRisk of overturning!

To reduce the risk of the crane overturning do not raise the outrigger pads more than 5 to 10 cm (2 to 4 inch) off the ground. Leave the outrigger beams extended.

4.6 Driving with rigged crane and boom extension

Switching on separate steering

Before driving with the rigged crane you must switch on the separate steering:

• Switch on the level adjustment system key switch.

C0018 b• Switch on separate steering by releasing the Separate steering rocker switch and pressing it down.

SDamage may occur to steering linkage! Before driving with the rigged crane always switch on separate steering and steer the truck crane only when the vehicle is moving. If separate steering is switched off or if you steer with the vehicle stationary the steering linkage may become damaged.

SRisk of tyre damage!

Check the pressure in the tyres before the rigged truck crane is moved! The truck crane may only be moved if the tyres have been inflated to the required air pressure;à GMK 5200/6220-L operating instructions , Part 2, Chapter Technical information, Section Carrier – Tyres Do not reduce the tyre pressure!

HThe wind speed must be checked before the rigged truck crane is moved! The same maximum permissible wind speeds apply as when working with the crane; à Operating instructions GMK5200/6220-L operating instructions, Part 2, Chapter Crane operation, Section Crane work with main boom – External influences during crane operation – Effect of wind on crane operation.

• To move the truck crane, switch the transfer case to off-road gear; à GMK 5200/6220-L operating instructions, Off-road gear.

• Switch to Gear 1; à Operating instructions GMK5200/6220-L operating instructions, Automatic gearbox – Operation

• The turning radius should be as large as possible when turning corners!

• Steer the truck crane only when it is moving and avoid sudden steering movements!

Extending the outriggers

Boom extension

4.6 Driving with rigged crane and boom extension

When the surface is uneven the truck crane must be raised with the outrigger cylinders, horizontally aligned and then re-lowered; à Operating instructions GMK5200/6220-L – Outrigger / Retracting and Switching to suspension locking system

The truck crane must be on outriggers before beginning work with the crane; à Operating instructions GMK5200/6220-L, Outrigger.

GRisk of overturning!

The truck crane must be raised until no wheels touch the ground!

4.6 Driving with rigged crane and boom extension

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