Control and operation

Recovering, towing the machine

Machine towing procedure

Drain the equipment. Make sure that the machine will not roll away by itself when the brakes are released. If necessary, put stop blocks in front of or behind the track. Open cover over travel motors and store carefully.

Move tap on both travel motors to horizontal position. Pressure connections are connected to each motor.

Insert the lever in the hand pump. Operate hand pump to reach 30 bar. The travel brakes are released.

Danger!

Falling work equipment!

Death, injury from crushing. When the work equipment is raised: Do not actuate joysticks.

Control

After towing

Remove the lever from the hand pump. Release the pressure generated by the hand pump by turning the small lever on the pump. The travel brakes are engaged again. Move tap on both travel motors to the vertical position. Pressure connections are no longer connected. Screw cover back over travel motors.

3.7Installation and removal of attachment parts

3.7.1Attaching and dismounting the grab on the industrial stanchion

Before attaching a clamshell bucket or grapple, ensure that the required hydraulic lines for operating the grab are attached to the industrial stanchion. Attaching and dismounting a grab should be carried out by two people.

Danger! Risk of injury. moving the equipment.

Attaching the grab

Position the grab with the shell fully open.

Move the equipment until the lower mount of the industrial stanchion is between the bearing points of the grab mounting 1

Guide in bolt 4 and secure using disk 6

Connect hydraulic hose 11 and hydraulic hose 12 for the shell cylinder supply to the pipes for the shovel tilting cylinder.

For a grab with a hydraulic torsional mechanism, also connect hoses 13 and 14 to the pipes for this auxiliary device.

Operating the grab

Carry out all work movements several times without a load (open and close the shell or move the grab to the left and to the right) so that any air that may be present in the hydraulic circuits can escape.

Dismounting the grab

Set the grab down onto level ground with the shell fully opened. Turn off the engine and, with the ignition key in the contact position, push the right joystick (for Open and Close grab)briefly to the left and then to the right in order to remove the pressure in the hydraulic circuits.

Separate hydraulic hose 11, hydraulic hose 12 and, if present, hydraulic hoses 13 and 14 from the pipes on the shovel arm. Close open lines immediately to prevent any dirt entering.

Support the grab so that it is stable.

Unscrew disk 6 and knock bolt 4 carefully out. You may have to start the engine and raise the equipment slightly to do this.

3.7.2Attaching and dismounting the stick to the boom

Dismounting the stick

If necessary, remove the bucket.

Retract the bucket and stick cylinder as far as the stop, position the attachment on the ground.

If necessary, tie the connector bracket 7 to the bucket cylinder so it can not slip out.

Turn the engine off.

Release the pressure in bucket and stick cylinder circuit by turning the ignition key to contact position, tilting the safety lever down, and moving the right joystick to the left and right, the left joystick forward and backward.

Release the pressure in the hydraulic tank.

Attach the lower part of the stick cylinder 16 to the lift with a strap.

Position a wooden block under the stick cylinder, remove the plate of pin 17, lightly lift the the cylinder, drive out the pin 17and position the stick cylinder 16 on wooden blocks.

Figure B

Insert the pin 17 in the rear bearing of the stick and secure it with the plate, then attach the pin 17 to the lifting device with a strap.

Attach the head of the bucket cylinder 18 (or to the hook of the bucket, if the stick is removed with the bucket in place), to the lift with a strap.

Disconnect both hoses 21 from the tilt cylinder 18 and close them off to prevent contamination.

Remove the cotter pin and the castle nut on pin 20 and drive the pin out. If necessary, start the engine and slightly lift the attachment to reduce the weight of the boom on pin 20.

Raise the stick (or the stick with the bucket) with a lift, pull the stick from the boom and position it on the ground, supported by wooden blocks and remove the lift.

Attaching the stick (or stick with bucket)

Figure B

Insert the pin 17 in the rear bearing of the stick and secure it with the plate, then attach the pin 17 to the lifting device with a strap.

Attach the top of the bucket cylinder 18 (or the hook of the bucket, if the stick is removed with the bucket in place), to the lifting device with a strap.

Raise the stick (or the stick with the bucket) with a lift inside the bore holes of the boom so that the pin 20 can be inserted.

Insert pin 20 and fix the castle nut and the cotter pin to the pin 20

Remove the pin 17

Reconnect both hoses 21 to the tilt cylinder 18.

Figure A

Attach the lower part of the stick cylinder 16 to the lift. Slightly lift the stick cylinder and if necessary run engine to extend or retract cylinder so that cylinder head fits between the bore holes of the stick.

Insert the pin 17 and secure it with the plate. If necessary, install the bucket.

Lubricate all greasing points between stick and boom and between bucket and stick directly or with the automatic grease system (if mounted) until clean grease comes out of the greasing points.

Lift the attachment and tilt the bucket out and in several times to release the air from the hydraulic system.

Installation and removal of attachment parts

Note!

After installation of a new stick and digging bucket combination, the restrictor check valve 222 for stick cylinder must be eventually readjusted so to have the correct velocity of the working attachment (due to weight difference of the attachment parts).

If necessary, consult a LIEBHERR mechanic.

3.7.3Mechanical quick-change adapter (option)

Safety instructions

attaching and dismounting work tools. Move the work equipment as slowly as possible when attaching and dismounting a work tool. Get to know the mode of operation of the quick-change adapter before attaching or dismounting work tools.

unlocking to avoid creating conditions which may lead to danger. stand on the work tool.

locking pin for the quick-change adapter inserts in the bore holes on the work tool which are designed for the purpose and that the work tool raises correctly. A direct visual check must be made to ensure that the work tool is correctly positioned.

is only raised to the point where the correct position of, for example, the pin in the pin eye can be tested by tilting in and out.

change adapter or the integrated lifting hook can exceed or fall short of the load carrying capacity of the carrier device. When operating, it should be ensured that the values provided in the load chart and the technical data for the carrier device are adhered to.

Overview

1 Locking pin (removed) 3 Crank

5 Lifting hook

2 Locking screw 4 Sealing plug

Attaching the work tool

To move the equipment into position:

3-112 Positioning the equipment

The equipment must be standing stable or lay loose on the ground. Move the stanchion and work tool into position. Insert the shovel tilting cylinder fully.

To unlock the quick-change adapter:

6 Take-up hook for work tool Danger! Risk of injury.

Ensure that the work equipment cannot be moved by others when this action is being carried out.

Approach the quick-change adapter from the side and unscrew the locking screw 2 using the crank 3 from the locking pin 1 (see Fig. 3-111).

Insert the crank 3 in the locking pin 1 and turn to the left (anti-clockwise), until both locking pins 1 are inserted as far at the stop.

Taking up the work tool:

3-113 Taking up the work tool

Move the quick-change adapter into a position that allows the work tool to be picked up using the take-up hook.

Raise the work tool from the ground and extend the shovel tilting cylinder fully until the bearing panel for the work tool is laying on the quick-change adapter stop. The bore holes of the work tool and the locking pins of the quick-change adapter must form a row.