HYDRAULIC TRACK PRESS

PT 350

A 211/ EN

PT 350 inglese 16-05-2006 13:02 Pagina 6

OPERATING FIELDWith its new hydraulic PT 350 press, Bercoadds an updated and powerful working instru-ment to its already well-known range ofmachines and equipment used in the trackedvehicles maintenance sector. Due to its capacity and size, this model allowsassembling and disassembling operations tobe carried out safely and efficiently, on allchains up to a maximum inside length ofchain link of 350 mm. Such a range includesthe largest ones among modern tracked vehi-cles: Komatsu PC1000-2, Orenstein & KoppelRH90C and RH120C, Caterpillar D11 andothers.In line with the Berco tradition, the performan-ce and reliability of the new PT 350 presshave been fully tested in the productiondepartments of our plants, under the mostsevere of conditions for volume and continuosworkload.

STRUCTUREDuring the design phase, we have widelyused the new computer-aided technologies,such as the structural analysis with the finiteelements method, so that to optimize the sizeof the machine.The structure, for instance, made with electri-cally welded plates, has been analysed interms of plate thickness (see figure 1), thusobtaining a remarkable reduction of mechani-cal stresses and, as a consequence, of defor-mations when performing heavy duty opera-tions.An innovative design (so called “tandem desi-gn”) has been implemented for each one ofthe two main cylinders, with an horizontal andopposed layout. Considering the same maximum availablethrust, this solution allowes smaller diameterscylinders, thus reducing space and stresses.

Fig. 1 - Graphic result of the finite elements analysis.

Fig. 2 - Hydraulic box assembly.

hydraulic track press

Fig. 3 - Electric controls and pressurecontrol valve.

PT 350 inglese 16-05-2006 13:02 Pagina 1

OPERATING SYSTEMThe working procedure is the same asfor model PT 200, widely known andused by this sector’s users thanks to itsreliability.An hydraulic winch pulls the chain alongthe roller conveyor; the first part of theroller conveyor (which is an integral partof the press and whose motor is hydrau-lically-operated) is used to move thechain in both directions; it is also usedfor the correct lenghtwise positioning inrelation to the assembling and disas-sembling plates and to the slide (mova-ble rest insert). The slide, through anhydraulic cylinder, is vertically moved inthe two possible positions: high (referen-ce and operating position) and low (thusenabling the chain horizontal move-ments). The equipment, for the assem-bling and disassembling phases, consi-sts of a pair of plates. Each plate is com-posed by two pushers (one for the pinside and for thethe other one bushingside).

SPECIAL FITTINGSThe PT 350 press is supplied completewith the required protection equipmentfor the operating area which includes asliding door with wide LEXAN windows(fully complying with the Europeansafety standards - EC).When the protection devices are open,only positioning movements are allowed.Togheter with the sliding protection, themachine can also be supplied with achain blocking device.It makes sure that the part of chain alongwhich you are operating is kept in theproper position. This device is pneuma-tically operated, both automatically(when closing the protection device),and manually with a selecting mechani-sm.

HYDRAULIC BOX AND CONTROLSThis press is completely hydraulically-controlled by means of a separatehydraulic box located in the back of themachine. The box is connected to themachine through flexible hoses (seefigure 2). The controls for the activation of theworking movements are “electric mani-pulator” low voltage type. Their size issuitable to make their use easy also foroperators using working gloves. Theirlocation has been studied carefully basedon ergonomic evaluations in order to mini-mize the movements for a normal opera-tion.On the front side of the machine, in aneasily accessible place for the operator,a manually-operated valve (see figure 3)for the adjustement of the maximumhydraulic pressure level togheter withthe relevant control pressure gauge,

have been installed.

Fig. 4 - General view of the PT 350 machine.

PT 350 inglese 16-05-2006 13:02 Pagina 2

1Elements of the chain section inassembling position.

Link assembling phase. Section of assembled chain.

Pushers against pin and bush. End phase of the link disassembling.

STANDARD OUTFIT- Motor-driven roller conveyor for pulling track chain- Set of service tools

EXTRA OUTFITA00A36250 - Auxiliary idle roller conveyor (min. 4 pieces suggested)A00A36270 - Stand for auxiliary roller conveyorA00A36330 - Sliding protection deviceA00A36300 - Pneumatically operated chain blocking device A00A36962 - Plate kit for PT 200 pusher-holder use (2 pieces are needed)

N.B. Assembling and disassembling plates and movable rest insert are supplied separately, according with the type of chain.

2 3

2 3Section of chain in disassemblingposition.

ASSEMBLING OPERATION

DISASSEMBLING OPERATION

1

assembling and disassembling operations

PT 350 inglese 16-05-2006 13:02 Pagina 3

technical data

WORKING CAPACITY

MOTOR RATING

DIMENSIONS AND WEIGHTS

325 358 sh ton

Max. working pressure ..................................................................................................bar 350 4980 lbf/in2

Ram rod diameter ...........................................................................................................................mm 270 10 5/8”

Max. approach speed of the rams ........................................................mm/min 1050 41”/min

280 11”/minMin. approach speed of the rams ..........................................................mm/minApprox. return speed of the rams .........................................................mm/min 2100 82”/min

Max. travel of the rams ................................................................................................mm 190 7 1/2”

Max. distance between the rams ends .........................................................mm 1000 39”

Max. distance table surface to ram C/L ......................................................mm 125 5”Winch pull ...................................................................................................................................kgf 4500 9900 lbf

Hydraulic control box main motor .......................................................................kw 22 (CV 30)

Height ...........................................................................................................................................mm 1800 71”

Width ..............................................................................................................................................mm 3300 130”

Length, less auxiliary conveyors ........................................................................mm 3200 126”

Length, with 4 auxiliary conveyors....................................................................mm 14800 582”

Approx. volume/weight, sea-packing ...................................................................kg 9000 lb 19800

Auxiliary motor .......................................................................................................................kw 0,55 (CV 0,75)

Max. thrust capacity of rams .......................................................................................tf

Motor rating is referred to 50Hz frequency.Measurements, weights and executions are not binding on manufacturers and can be changed without previous notice.

Fig. 5 - Overall dimensions ofthe press and conveyor.

Fig. 5

PT 350 inglese 16-05-2006 13:02 Pagina 4

Crankshaft Grinders - Camshaft Grinders - Cylinder head and block Grinders - Cylinder Boring Machines - Valve SeatBoring Machines - Boring and Honing Bars - Con-rod Boring and Grinding Machines - Cylinder Honing Machines - Brakedrum and disc Lathes and Grinders - Line Boring Machines - Equipments for valve and valve seat reconditioning - Portableand Stationary Hydraulic Track Presses.

BERCO spa44034 COPPARO (Ferrara) - ItalyPhone (+39) 0532 864111Fax (+39) 0532 864259

BERCO - MACHINE TOOL DIVISION

AA CCoommppaannyy ooff TThhyysssseennKKrruupppp TTeecchhnnoollooggiieess

ISO 9001 Cert. n. 0029/4 ISO 14001 Cert. n. 0009A/2

PT 350 inglese 16-05-2006 13:02 Pagina 5