AUTOMATIC CENTRALIZED ATTACHMENT LUBRICATING SYSTEM (Optional equipment)

Your machine is fitted with a centralized lubricating system, allowing to reduce to a minimum the time which is necessary for the daily lubrication.

All the lubrication points for the swing ring ball races (metering device pos. 22) and for the working attachment are connected to this automatic lubricating system and are greased at regular intervals while working.

Only some bearings of the working tool (grab, clamshell, type of the tool).

Construction

The centralized lubricating system mainly consists of the lube pump 1 (fig. 42) which is mounted to the front face of the hydraulic tank, just beside the serially fitted lube pump 2 for the swing ring teeth lubrication.

Both lube pumps 1 and 2 are identical.

Each lube pump consists of a transparent container, an electric driven pump and a control unit which starts and stops the lubricating procedures.

During a lubricating procedure, all lube points are lubricated in a certain sequence.

After completion of a lubrication procedure, the switch mounted to the exit for the last lube point (fig. 43, pos.?6) automatically turns off the pump.

The flow sequence and amount of lubricant for each lubrication point depend on the combination of the metering devices and lubrication lines.

Operation

Without any action by the operator, the lubrication restarts automatically after the a preadjusted "pause time" is over and stops after all points are lubricated.

When the lube pump 1 (resp. the lube pump 2) is greasing, the control light inside the push button S84-1 resp. S84-2 (fig. 44) is on continuously.

If blinking, the control light S84-1 or S84-2 indicates that the corresponding lubrication circuit 1 or 2 is defective (lubricating procedure did not stop after approx. 30 minutes).

Possible causes:

- Plugged or kinked lubrication line.

- Defective switch or defective wire.

- Not enough grease in the grease tank.

- Problem in the 24 V electrical circuit for the motor. Immediately locate and remedy the cause of the trouble.

. The tracks are maintenance free until the track pads or flanges need to be reconditioned or replaced.

. The lifetime seals in carrier rollers, track rollers and idlers increase the life expectancy of the tracks and protect from dirt and contamination .

. However, even though the track is virtually maintenance free, the following points do need to be checked.

Tightening The Track Tension

. Fig. 17 A shows a track, that is not tightened properly, Fig. 17 B shows a track that is tightened properly.

. The track tension needs to be checked regularly due to normal wear of the tracks, and tightened, if necessary.

. The track chain tension is correct when the slack

. To check the chain slack (fig. 18) :

. - measure X1, distance between running surface of carrier roller and top of side frame

. - measure X2, distance between chain link and top of side frame

. - calculate chain slack = X1 - X2.

To tighten a track :

. - Remove the access cover (Fig. 19, pos. 4) on the side frame of the undercarriage.

. - Attach a special fitting 2 to grease gun 1 (Fig. 20).

. - Connect the grease gun to cylinder 3.,

. - Pump grease into cylinder 3 until the track chain is properly tensioned.

. To release track tension, carefully release some grease from the grease cylinder by loosening and turning the grease fitting counter clockwise.

Danger

When adjusting the chain tension, keep your head clear of the access hole. The grease cylinder is under high pressure and the chain will sag. Grease is under high pressure and might squirt out.

The removal and the repair of the track chains, as well as the removal of the idler unit and of the tension spring unit are not described in this manual and have, for safety reasons, to be performed exclusively by trained LIEBHERR Service personnel.

Moving The Articulated Hand Rails

Fully opening the various covers of the uppercarriage for maintenance work on the hydraulic pumps, the air filters or the radiator requires opening the articulated hand rails. These pivot after removing 4 to 6 fastening screws depending on the type of hand rail concerned.

Danger

Always stand on the catwalk to loosen/tighten the fastening screws on pivoting parts. When moving pivoting parts and covers, always stand behind a hand rail to prevent falling off the machine.

Be aware of crushing injuries when moving pivoting parts.

To open cover H on the hydraulic pumps (fig. 76), remove fastening screws 11 on pivoting part 10, then hit this part along the fixed hand rail. Open the cover by placing yourself on the left of it and block it with the handle provided for this purpose. Reclose part 10 by pulling back the hand rail like when opening it. Replace fastening screws 11 and secure.

The radiator hood and the moving element of the hand rail allow the operator to open this cover for maintenance. Since the system is identical to the system for hydraulic pack covers and its moving parts, the procedure for opening the cover is identical except: when opening the cover, stand on the right.

To open cover F for the air filters, remove screws 21 on hand rail 20, open the filter cover and reclose element 20. Replace screws 21 and retighten. Close the access flap on the catwalk before starting maintenance work on the filters. After maintenance work, close covers and proceed in reverse order of opening procedure.

ADDITIONAL INSTRUCTIONS FOR "HIGH RISE" MACHINE

The following instructions, specific to tower excavators, complete the general information provided in this operation and maintenance manual.

They must be given any person who might work on the machine, and must be adhered to any time while having access to the excavator, during operation and maintenance works.

Destined Use Of A High Rise Excavator

We call "high rise excavator" an hydraulic excavator fitted with an intermediate part between under and uppercarriage, this part constituting an elevation aimed to keep the uppercarriage far above its usual height.

The advantage of such a machine is to offer an optimum sight for special works (handling over a wall, unloading barges, ...) while keeping the ability of travelling freely on a firm and level ground.

High rise excavators are primarily intented for loading, lifting or handling loads or loosen material with the use of a grab, a lifting magnet, clamshells, ... .

The use of such machines with an earthmoving attachment or in earthmoving applications, as well in demolition application is not authorized.

Travelling the machine so to transport an attached load is prohibited.

General Safety Information For The Operation Of The High Rise Excavator

Only operate the machine and translate it on a firm and level ground. The travel route of the machine must be even and free of any obstruction.

Operate the machine only in areas with a sufficient soil bearing capacity (this capacity must be at least 4,35 daN/cm2).

Due to the limited sight of the driver to the rear of the machine, it is of special importance to keep any third person out the working range of the machine during operation.

Always alert eventual nearby standing personal by sounding the horn before starting the machine and before beginning a travel movement.

The machine is fitted with a travel alarm. If this safety equipment is not functioning, get it repaired immediately.

The different cylinders should only be gradually retracted or extended as far as possible. If the cylinders hit the stopping point too violently, the resulting reactive forces may damage the attachment. Observe all safety procedures and regulations which are applicable on the jobsite. Never leave the driver's cab without making sure that the attachment is resting on the firm ground. After work, always leave the machine with the grab laid to the ground and the stick in vertical position, as shown on figure 1.

Access To The Uppercarriage

Before leaving the machine, always align the upper- and the undercarriage, so that the steps on the undercarriage and the access ladder to the uppercarriage coincide.

After reaching the uppercarriage, immediately close off the chain giving access to the footbridge.

It is strictly forbidden to any person to try to accede to the excavator during operation without getting the permission by the driver.

The person wishing to accede to the excavator must first give signal to the driver.

Once the driver has recognized his intention, the driver must align the upper and the undercarriage, lower the attachment to the ground, get in work - or entrance position (see figure 5), lift the safety lever, leave the cab and open the access chain.

The person is now allowed to approach and to climb up the machine.

The driver must never allow another person standing on the platform around the uppercarriage during operation.

Always keep handles steps, railings, platforms, ladders in good condition and free of dirt, snow or ice. The dimensions of the ladder, stairway and guard rails are within ISO 2867 recommendations.

Safety Guidelines For Maintenance Works On The High Rise Excavator

When working from the ground level to the under part of the uppercarriage with catwalk platform, or to the working attachment, use appropriate, safe and stable scaffolding or other working platforms designated for that purpose.

Never step on parts or components on the machine when maintaining or repairing items overhead. When working high above ground, make sure you are fitted with ropes and appropriate safety devices which will prevent a possible fall.

When working inside the intermediate part of the excavator (sealing works on the hydraulic circuit to the undercarriage, replacement of a hose, ...) take all the necessary precautions to avoid that the excavator can be started by another person:

Turn the battery switch off and lock it in opened position using the attached padlock

Attach a "do not operate" tag to the starter switch