mecalac 12 MXT Handbook
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mecalac 12 MXT Handbook

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HANDBOOK OF REPAIR
MANUFACTURER: "MECALAC SAS"

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Summary of Contents for mecalac 12 MXT

  • Page 1 HANDBOOK OF REPAIR MANUFACTURER: “MECALAC SAS”...

  • Page 3: Table Of Contents

    28000 12MXT Contents 1. Safety precautions ......................3 2. Description of the machine ...................4 Central joint ............................4 Stabilizers ............................4 Rear chassis.............................4 Transmission ............................4 Turntable............................4 Cab ..............................4 Controls ............................4 Seat ..............................4 Equipment ............................4 2.10 Tool-holder............................5 3. Technical characteristics ....................6 Turbocharged engine ........................6 Axles..............................6 Capacities............................6 Electrical system..........................6...
  • Page 4 12MXT 28000 Steering and slewing circuits ......................31 Turntable supply and return circuit ....................32 Equipment pump, stabilizers, Oscillation lock and cooling circuits ..........33 Boom, intermediate boom, dipper, offset and additional functions ..........34 Bucket circuit ..........................35 Spool valve (A / Down - B / Upper) ....................36 Additional hydraulic equipment for fitting of the hammer return on the equipment (option) ..37 9.10 Tool-holder circuit (option) ......................38 9.11 Air conditioning circuit (option) .......................39...

  • Page 5: Safety Precautions

    28000 12MXT 1. Safety precautions Throughout this book the symbol is used to draw your attention to areas where special care is required, to prevent accidents and injury. • Construction sites are busy places, often with wet, muddy ground, conditions which impede other workers ability to avoid carelessly driven machinery.

  • Page 6: Description Of The Machine

    12MXT 28000 2. Description of the machine The excavator is made up of a front chassis section, a rear chassis section, a turntable, a cab and equipment consisting of four elements. 2.1 Central joint The ground contact of the four wheels is provided by the oscillation of the rear axle. The ground contact of the four wheels is provided by the oscillation of the rear axle.

  • Page 7: Tool-Holder

    28000 12MXT 2.10 Tool-holder At the end of the dipper is the tool-holder permitting the instant changing of the bucket or tool from the cab without manual intervention. Buckets or tools are taken up automatically. Only their unlocking requires hydraulic energy.

  • Page 8: Technical Characteristics

    12MXT 28000 3. Technical characteristics 3.1 Turbocharged engine Type:.........................CUMMINS 4BT4.5C Diesel: ......................... 4 in-line cylinders Net horsepower at flywheel (DIN 70020 / ECE-R2403): ........74 kW at 2,200 rpm Maximum net torque at flywheel (DIN 70020 / ECE-R2403): ......414 N.m at 1,500 rpm Cubic capacity: ........................

  • Page 9: Hydraulic System

    28000 12MXT 3.5 Hydraulic system Three completely independent circuits: hydrostatic transmission, equipment circuit, and steering and slewing circuit. 3.5.1 Hydrostatic transmission Reversible closed circuit, with declutching bypass valves in case towing is necessary. Transfer movement pump: ..................... 71 cm Transfer movement engine:................... 140 cm Axial piston engine and pump: Variable displacement and axial piston motor and pump permitting the continuous variation of the transmission ratio over the machine’s entire speed range.
  • Page 10 12MXT 28000 3.5.2 Equipment circuit: Variable displacement, axial piston pump: • Cubic capacity: ......................63 cm • Maximum delivery: ....................140 l/min Associated functions by solenoid-operated valves: • Low pressure: ......................~ 35 bar Accelerator. Oscillation lock. Seat pivoting console safety device. •...

  • Page 11: Equipment's Travel Curves

    28000 12MXT 4. Equipment’s travel curves 4.1 In back-hoe bucket position 6860 6740...

  • Page 12: In Loading Bucket Position

    12MXT 28000 4.2 In loading bucket position 6735 6620...

  • Page 13: Table Of Stability Loads In Kg

    28000 12MXT 5. Table of stability loads in kg 5.1 Lifting and handling in the longitudinal position with standard or telescopic stabilizers Working conditions: On wheels with the stabilizers. On level, compact ground. Equipment used without any offset. Front and rear chassis sections aligned. Without any tool (bucket, loader, etc.) with handling plate + hook.

  • Page 14: Lifting And Handling In The Longitudinal Position Without Stabilizers

    12MXT 28000 5.2 Lifting and handling in the longitudinal position without stabilizers Working conditions: On wheels without the stabilizers. On level, compact ground. Equipment used without any offset. Front and rear chassis sections aligned. Without any tool (bucket, loader, etc.) with handling plate + hook.

  • Page 15: Lifting And Handling In The Transverse Position With Standard Stabilizers

    28000 12MXT 5.3 Lifting and handling in the transverse position with standard stabilizers Working conditions: On wheels with the stabilizers. On level, compact ground. Equipment used without any offset. Front and rear chassis sections aligned. Rear axle oscillation locked. Without any tool (bucket, loader, etc.) with handling plate + hook.

  • Page 16: Lifting And Handling In The Transverse Position Without Stabilizers

    12MXT 28000 5.4 Lifting and handling in the transverse position without stabilizers Working conditions: On wheels without the stabilizers. On level, compact ground. Equipment used without any offset. Front and rear chassis sections aligned. Rear axle oscillation locked. Without any tool (bucket, loader, etc.) with handling plate + hook.

  • Page 17: Lifting And Handling In The Transverse Position With Telescopic Stabilizers

    28000 12MXT 5.5 Lifting and handling in the transverse position with telescopic stabilizers Working conditions: On wheels with the telescopic stabilizers fully extended. On level, compact ground. Equipment used without any offset. Front and rear chassis sections aligned. Rear axle oscillation locked. Without any tool (bucket, loader, etc.) with handling plate + hook.

  • Page 18: Lifting And Handling In The Longitudinal Position With Stabilizers

    12MXT 28000 5.6 Lifting and handling in the longitudinal position with stabilizers Working conditions: On level, compact ground. Equipment used without any offset. Front and rear chassis sections aligned. Without any tool (bucket, loader, etc.). Bucket ram always full extended with hook fixed on tool- holder rod.

  • Page 19: Lifting And Handling In The Longitudinal Position Without Stabilizers

    28000 12MXT 5.7 Lifting and handling in the longitudinal position without stabilizers Working conditions: On level, compact ground. Equipment used without any offset. Front and rear chassis sections aligned. Without any tool (bucket, loader, etc.). Bucket ram always full extended with hook fixed on tool- holder rod.

  • Page 20: Lifting And Handling In The Transverse Position With Stabilizers

    12MXT 28000 5.8 Lifting and handling in the transverse position with stabilizers Working conditions: On level, compact ground. Equipment used without any offset. Front and rear chassis sections aligned. Rear axle oscillation locked. Without any tool (bucket, loader, etc.). Bucket ram always full extended with hook fixed on tool- holder rod.

  • Page 21: Lifting And Handling In The Transverse Position Without Stabilizers

    28000 12MXT 5.9 Lifting and handling in the transverse position without stabilizers Working conditions: On level, compact ground. Equipment used without any offset. Front and rear chassis sections aligned. Rear axle oscillation locked. Without any tool (bucket, loader, etc.). Bucket ram always full extended with hook fixed on tool- holder rod.

  • Page 22: Lifting And Handling In The Transverse Position With Telescopic Stabilizers

    12MXT 28000 5.10 Lifting and handling in the transverse position with telescopic stabilizers Working conditions: Telescopic stabilizers extended in maximum position. On level, compact ground. Equipment used without any offset. Front and rear chassis sections aligned. Rear axle oscillation locked. Without any tool (bucket, loader, etc.).

  • Page 23: Towing

    28000 12MXT 6. Towing 6.1 Disconnection of the hydrostatic travel Before carrying out any hydrostatic travel disconnecting operation, make sure that the parking brake is applied and that the tow bar is properly coupled to the towing vehicle. Apply the parking brake (2 fig. 1). Undo the heads of the limiters on the bypass valves (1 fig.

  • Page 24: If The Turntable Is Badly Oriented

    12MXT 28000 6.2 If the turntable is badly oriented The slewing motor is equipped with a safety brake which locks the turntable in the event of a power-assistance pressure fault, red warning light (1 fig. 4). In this case, if the machine needs to be towed and if the turntable is incorrectly oriented, it is necessary to release the motor brake.

  • Page 25: Transporting The Machine

    28000 12MXT 7. Transporting the machine 7.1 Loading on a trailer Install access ramps whose slope does not exceed 30% if the trailer is not equipped with them originally. Fastening points: (A-B-C fig. 3). Lock the chassis (1 fig. 1). Lock the turntable (1 fig.

  • Page 26: Slinging For Lifting

    12MXT 28000 7.2 Slinging for lifting Put the equipment in the “boom ram vertical” position (2 fig. 4) and (fig. 6). Lock the oscillation (1 fig. 5). The machine will not be articulated. Lock the chassis sections using the links (1 fig. 1). Lock the turntable (1 fig.

  • Page 27: Location Of The Hydraulic Components

    28000 12MXT 8. Location of the hydraulic components 1 - Tool-holder ram 7 - Accelerator ram 2 - Bucket ram 8 - Oscillation locking ram 3 - Dipper ram 9 - Steering ram 4 - Offset ram 10 - Stabilizer ram 5 - Intermediate boom ram 11 - Telescopic stabilizer ram 6 - Boom ram...
  • Page 28 12MXT 28000 1 - Sequence valve 5 - Stabilizers solenoid-operated valve 2 - Solenoid-operated oscillation locking valve 6 - Equipment pump 3 - Transfer movement engine 7 - Orientation pump 4 - Transfer movement pump 8 - Telescopic stabilizer selector...
  • Page 29 28000 12MXT 1 - SX14 valve block 5 - CROSS OVER valve 2 - High pressure function block 6 - Low pressure driving unit 3 - Priority valve 7 - Braking block 4 - Orientation engine...
  • Page 30 12MXT 28000 1 - Rotary coupling 5 - ORBITROL steering device 2 - Left manipulator 6 - Accelerator foot control 3 - Additional functions foot control 7 - Right manipulator 4 - Brake / Inching foot control 8 - Parking brake control lever...

  • Page 31: Hydraulic Diagrams

    28000 12MXT 9. Hydraulic diagrams 9.1 Travel circuit G-M1 A1 - Hydraulic reservoir A2 - Transfer movement engine A3 - Transfer movement pump...

  • Page 32: Accelerator, Main And Parking Brake Circuits

    12MXT 28000 9.2 Accelerator, main and parking brake circuits A1 - Hydraulic reservoir B7 - Rear axle A3 - Transfer movement pump B8 - Sequence valve B1 - Parking brake control B9 - Diesel engine B2 - Brake foot control B10 - Accelerator ram B3 - Accelerator foot control B11 - Functions block (High pressure)

  • Page 33: Steering And Slewing Circuits

    28000 12MXT 9.3 Steering and slewing circuits A1 - Hydraulic reservoir C4 - ORBITROL steering device B6 - Rotary coupling C5 - Hydraulic turntable slewing motor B12 - Drain block C6 - CROSS OVER block with damped valve B13 - Turntable rotation C7 - Steering ram C1 - SX14 valve block C8 - Slewing pump...

  • Page 34: Turntable Supply And Return Circuit

    12MXT 28000 9.4 Turntable supply and return circuit B6 - Rotary coupling C1 - SX14 valve block B11 - Functions block (High pressure) C2 - Left manipulator B12 - Drain block D1 - Right manipulator B13 - Turntable rotation E8 - Equipment pump...

  • Page 35: Equipment Pump, Stabilizers, Oscillation Lock And Cooling Circuits

    28000 12MXT 9.5 Equipment pump, stabilizers, Oscillation lock and cooling circuits A1 - Hydraulic reservoir E4 - Right electric manipulator A3 - Transfer movement pump E5 - Stabilizers solenoid-operated valve B6 - Rotary coupling E6 - Oscillation lock piloting unit C1 - SX14 valve block E7 - Oscillation lock rams E1 - Left stabilizer ram...

  • Page 36: Boom, Intermediate Boom, Dipper, Offset And Additional Functions

    12MXT 28000 9.6 Boom, intermediate boom, dipper, offset and additional functions B11 - Functions block (High pressure) - Offset ram B12 - Drain block - Dipper ram C1 - SX14 valve block - Intermediate boom ram C2 - Left manipulator - Piloting unit (Low pressure) D1 - Right manipulator - Boom ram...

  • Page 37: Bucket Circuit

    28000 12MXT 9.7 Bucket circuit C1 - SX14 valve block D1 - Right manipulator - Piloting unit (Low pressure) G1 - Bucket ram...

  • Page 38: Spool Valve (A / Down - B / Upper)

    12MXT 28000 9.8 Spool valve (A / Down - B / Upper) H1 - Slewing supply inlet element H8 - “Additional functions” control element H2 - Slewing control element H9 - Pressure limiter (calibration 225 bar) H3 - Equipment supply inlet element H10 - Pressure limiter (calibration 400 bar) H4 - Boom control element H11 - Pressure limiter (calibration 420 bar)

  • Page 39: Additional Hydraulic Equipment For Fitting Of The Hammer Return On The Equipment (Option)

    28000 12MXT 9.9 Additional hydraulic equipment for fitting of the hammer return on the equipment (option) C1 - SX14 valve block - Hammer return hose...

  • Page 40: Tool-Holder Circuit (Option)

    12MXT 28000 9.10 Tool-holder circuit (option) B11 - Functions block (High pressure) - Tool-holder ram - Tool-holder...

  • Page 41: Air Conditioning Circuit (Option)

    28000 12MXT 9.11 Air conditioning circuit (option) B6 - Rotary coupling B11 - Functions block (High pressure) K1 - Compressor K2 - Solenoid-valve K3 - Priority block...

  • Page 42: Telescopic Stabilizers (Option)

    12MXT 28000 9.12 Telescopic stabilizers (option) B6 - Rotary coupling E5 - Stabilizers solenoid-operated valve E1 - Left stabilizer ram - Left telescopic stabilizer ram E2 - Left electric manipulator - Right telescopic stabilizer ram E3 - Right stabilizer ram - Selector block E4 - Right electric manipulator...

  • Page 43: Safety Valves (Option)

    28000 12MXT 9.13 Safety valves (option) B11 - Functions block (High pressure) G1 - Bucket ram C1 - SX14 valve block M1 - Boom ram valve - Dipper ram M2 - Load detector - Intermediate boom ram M3 - Intermediate boom ram valve - Piloting unit (Low pressure) M4 - Dipper ram valve - Boom ram...

  • Page 44: Manual Accelerator (Option)

    12MXT 28000 9.14 Manual accelerator (option) B3 - Accelerator foot control B11 - Functions block (High pressure) B6 - Rotary coupling B12 - Drain block B9 - Diesel engine B13 - Turntable rotation B10 - Accelerator ram N1 - Pressure reducer 45 bar...

  • Page 45: Volvo Tool-Holder (Option)

    28000 12MXT 9.15 Volvo tool-holder (option) B11 - Functions block (High pressure) O1 - Tool-holder ram C5 - Hydraulic turntable slewing motor O2 - Tool-holder solenoid-operated valve C6 - CROSS OVER block with damped valve...

  • Page 46: Additional Hydraulic, Electrical Control Of The Additional Function (Option)

    12MXT 28000 9.16 Additional hydraulic, electrical control of the additional function (option) B11 - Functions block (High pressure) - Piloting unit (Low pressure) B12 - Drain block P1 - Selector C1 - SX14 valve block P2 - Tube - “Additional functions” foot control...

  • Page 47: Parts List Of The Hydraulic Diagram

    6891055 28000 12MXT 10. Parts list of the hydraulic diagram 1 - Auxiliary function 36 - Rotary coupling 2 - Dipper ram 37 - Hydraulic reservoir 3 - Bucket ram 38 - Service brake ram 4 - Intermediate boom ram 39 - Check valve ARQ 0.5 bar 5 - Boom ram 40 - Auxiliary pedal control...
  • Page 48 12MXT 28000...

  • Page 49: Installation Of The Electric Bundles

    28000 12MXT 11. Installation of the electric bundles 1 - Left rear light connection 2 - Right rear light connection 3 - Motor bundle 4 - Electric collector bundle 5 - Relay plate bundle 6 - Cab connection 7 - Solenoid-operated valves bundle 8 - Left front headlight connection 9 - Driver station bundle 10 - Steering column bundle...
  • Page 50 12MXT 28000 Y100...

  • Page 51: Location Of The Electric Components

    Inversion of direction of bucket solenoid-operated valve Coupling of rams solenoid-operated valve Coupling of rams solenoid-operated valve “MECALAC 2” option solenoid-operated valve (control unit) Boom / inter. boom solenoid-operated valve (control unit) Boom / inter. boom solenoid-operated valve (control unit)
  • Page 52 12MXT 28000 Y22 Y21...
  • Page 53 28000 12MXT Designation Left stabilizer raising solenoid-operated valve Left stabilizer lowering solenoid-operated valve Right stabilizer raising solenoid-operated valve Right stabilizer lowering solenoid-operated valve Low speed solenoid-operated valve Reverse solenoid-operated valve Forward solenoid-operated valve Inversion of direction of travel solenoid-operated valve Oscillation lock solenoid-operated valve Left stabilizer block solenoid-operated valve Right stabilizer block solenoid-operated valve...
  • Page 54 12MXT 28000 + 15...

  • Page 55: A Relay Plate (Under The Cab Seat)

    : Low speed (I) Relay : Forward (F) solenoid-operated valve Relay : Forward (F), “Commodo” Relay : Forward (F) and reverse (R) inversion Relay : “MECALAC mode” Relay : Starting safety R10 - Relay : Bucket inverter R11 - Relay...
  • Page 56 12MXT 28000 + 15 + 30 + 30...

  • Page 57: B Relay Plate (Under The Cab Seat)

    28000 12MXT 12.3 B relay plate (under the cab seat) 10 A fuse : Not used F10 - 7.5 A fuse : Front windscreen wiper and washer F11 - 15 A fuse : Front / rear working lights F12 - 10 A fuse : Dipped beams F13 -...

  • Page 58: Air Conditioning Relay Box (Option) (Under The Cab Floor)

    12MXT 28000 12.4 Relay box (on fuel tank) 15 A fuse : Reversing lights, audible reversing signal and direction inverter F31 - 5 A fuse : Engine shut-off relay F32 - 25 A fuse : Condenser fan supply (air conditioning) F33 - 3 A fuse : Rear left position light...

  • Page 59: Parts List Of The Electric Diagram

    6895018 28000 12MXT 13. Parts list of the electric diagram - Dehydrator pressure switch - Not used - Load overload pressure switch - 7.5 A fuse: Revolving light - Load overload pressure switch - 7.5 A fuse: Horn - Stop lights pressure switch - 10 A fuse: Pneumatic seat compressor - Parking brake pressure switch - 10 A fuse: F1 / F2 option...
  • Page 60 Y3A - Coupling of rams solenoid-operated valve R13 - "Hammer" option relay - Coupling of rams solenoid-operated valve R14 - Dipper beams relay - "MECALAC 2" option solenoid-operated R15 - Main beams relay valve R16 - Rear screen wiper relay...

  • Page 61: Adjustment Procedure

    28000 12MXT 14. Adjustment procedure 14.1 Adjustment procedure for the heat engine 14.1.1 Adjustment of maximum regime 13 flat spanner 4 hexagonal male spanner Inductive sensor 1- Loosen the lock nut and turn the stop screw (1 fig. 1). Fig. 1 Injection pump Note: Number of teeth on engine wheel = 159 Fig.
  • Page 62 12MXT 28000 14.1.2 Adjustment during minimum regime (slowed down) 13 flat spanner Flat screwdriver Inductive sensor 1- Loosen the lock nut and turn the stop screw (1 fig. 1). Fig. 1 Injection pump Note: Number of teeth on engine wheel = 159 Fig.

  • Page 63: Hydraulic Adjustment Procedure For The Gears

    28000 12MXT 14.2 Hydraulic adjustment procedure for the gears Before carrying out the checks, heat the hydraulic oil to between 50° and 60° in the tank. 14.2.1 Checking the power-feed pressure 17 flat spanner 5 male hexagonal spanner Manometer, 0 - 60 bar 1- Place the machine on the ground, speed in neutral, engine in maximum regime.
  • Page 64 12MXT 28000 14.2.2 Starting 13 flat spanner 4 male hexagonal spanner Inductive sensor Manometer 0 - 600 bar 1- Place the machine on a solid, flat surface before engaging high speed. 2- Accelerate the engine progressively until the machine starts. 3- Read the engine revs by monting an inductive sensor on the flywheel (1 fig.
  • Page 65 28000 12MXT 14.2.3 Adjusting the high pressure in forward movement (D.R.) 13 flat spanner 14 flat spanner 17 flat spanner 4 male hexagonal spanner Manometer, 0 - 600 bar 1- Place the machine in blocked position against a wall, or disconnect and stop up the Inching flex in order to use the service brake.
  • Page 66 12MXT 28000 14.2.4 Adjusting the grind in the heat engine 19 flat spanner 6 male hexagonal spanner Optoelectronic sensor Manometer, 0 - 600 bar 1- Place the machine in blocked position against a wall, or disconnect and stop up the Inching flex in order to use the service brake.
  • Page 67 28000 12MXT 14.2.5 Adjusting the transfer movement engine (switching point) 10 flat spanner 3 male hexagonal spanner Manometer, 0 - 600 bar 1- Place the machine on stabiliser support, with wheels raised; forward movement with high speed engaged, engine road configuration in maximum regime. 2- Raise the pressure in the transfer movement engine by progressively applying the stopping brake or the service brake.
  • Page 68 12MXT 28000 14.2.6 Adjusting the minimum capacity of the engine (speed of travel) 19 flat spanner 6 male hexagonal spanner Optoelectronic sensor 1- Place the machine on stabiliser support, with wheels raised; forward movement with high speed engaged, engine in maximum regime. 2- Read the speed in rpm by placing an optoelectronic sensor on the universal gear joint.
  • Page 69 28000 12MXT 14.2.7 Adjusting the Inching flex 10 flat spanner 3 flat hexagonal spanner Manometer, 0 - 600 bar 1- Place the machine on stabiliser support, with wheels raised; forward movement with low speed engaged, engine in maximum regime. 2- Place full pressure on the Inching pedal until the wheels stop, then gradually release the pedal until the wheels start moving again.

  • Page 70: Direction Adjustment Procedure

    12MXT 28000 14.3 Direction adjustment procedure 19, 27 and 30 flat spanners 6 male hexagonal spanner G DS16 1/2” female stopper G DS16 1/2” male stopper Manometer, 0 - 600 bar 14.3.1 Adjusting the primary controller Take great care when removing the flex, as it may be under pressure.
  • Page 71 28000 12MXT 14.3.2 Adjusting the ∆ ∆ P of the CROSS OVER valve 10 flat spanner 2 manometers, 0 - 600 bar Right side: 1- Place the machine equipment in a blocked position and turn the direction to the right, engine in maximum regime.

  • Page 72: Hydraulic Adjustment Of The Equipment

    12MXT 28000 14.4 Hydraulic adjustment of the equipment Before carrying out the checks, heat the hydraulic oil to between 50° and 60° in the tank. 14.4.1 Adjusting the assistance pressure 7/32” male hexagonal spanner 14 flat spanner Manometer, 0 - 60 bar 1- Engine in maximum regime, place a ram in blocked position, for example the bucket ram.
  • Page 73 5- Loosen the lock nut and turn the screw (1 fig. 3) clockwise in order to increase the ∆ ∆ P. Tare the shock absorber (first use). 1- Place the selector on “MECALAC 1” push the right manipulator to the right (blocked position) to allow oil to circulate.
  • Page 74 12MXT 28000 14.4.3 Adjusting the ∆ ∆ P of the equipment with adjustment of the power regulation (F.R. valve) 30 flat spanner Flow meter adaptation kit Warning: Take great care when removing the controller, as the chamber for the ram subject to the controller may be under pressure.
  • Page 75 17 flat spanner 3 male hexagonal spanner 2 manometers, 0 - 600 bar 3- Set the selector to MECALAC 1 and pull the right key towards the front (blocked position) to allow the oil to circulate (small chamber in the dipper ram).
  • Page 76 12MXT 28000 14.4.4 Adjusting the maximum pressure in the equipment pump (D.R.) 17 and 19 flat spanner 5 and 3 male hexagonal spanner Manometer, 0 - 600 bar 1- Over-tare the L.S. valve on the valve block by turning the controller screw to blocked position (1 fig. 1). Note: take care when over-taring the valve.
  • Page 77 28000 12MXT 14.4.5 Adjusting the maximum pressure of the equipment (L.S. valve) 19 flat spanner 5 male hexagonal spanner Manometer, 0 - 600 bar 1- With engine in maximum regime, place a ram in blocked position, for example the bucket ram. 2- Measure the pressure (1 fig.
  • Page 78 12MXT 28000 14.4.6 Adjusting the equipment pump (L.R. valve) 17 flat spanner 3 male hexagonal spanner 3/16” male hexagonal spanner Connector and hose (TOP-TEST MX) Manometer 0 - 60 bar 1- Take the plug out of the pump (1 fig. 1) and the breather off the hydraulic tank.
  • Page 79 Manometer, 0 - 600 bar Flow meter adaptation kit 1- Put the selector switch on “MECALAC 1”, pull the left manipulator back, push the right manipulator forward (as far as it will go) to allow the oil to circulate (small chambers of the dipper ram and intermediate boom ram).
  • Page 80 Flow meter adaptation kit 1- Place the equipment in blocked position against a wall, put the selector switch on “MECALAC 1”, pull the left manipulator back, push the right manipulator forward (as far as it will go) to allow the oil to circulate (small chambers of the dipper ram and intermediate boom ram).

  • Page 81: Control Sheet

    Engine No.: Equipment pump No.: Transfer movement pump No.: Transfer movement motor No.: Designation Adjustment values Stated or Speed Pressure 12 MXT regulated values (rpm) (bar) Turbocharged engine Maximum engine speed 2,225 (+25 -25) Minimum engine speed 950 (+50 -0)
  • Page 82 12MXT 28000...

  • Page 83: Tools

    28000 12MXT 16. Tools Fig. 1 TOP-TEST MX toolbox E6160001/00 0/600 0/60 0/600 4/20 4/20 4/20 p3: = p1: = p2: = dp: = contrast langage (p1-p2) prog abtast speicher drucker rate clear star/stop nin/max DS 0.3 DS 0.3 Fig. 2 TOP-TEST MX toolbox, upper foam section 1 - Main box MT-4010 2 - Male union 4DL8-7/16-unf 20 3 - Pressure sensor 4/20 mA / 0-600...
  • Page 84 12MXT 28000 Fig. 3 TOP-TEST MX toolbox, lower foam section 1 - Flexible hose (connection from the turbine to the SX18 valve block) 2 - Turbine (flow meter) 3 - Connecting cable 4 - Flexible hose (connection from the turbine to the SX18 valve block)
  • Page 85 28000 12MXT Fig. 4 Special connector tools 1 - 5180102 4 - 6525004 2 - 5180103 5 - 6525003 3 - 5180104 6 - 572A0003...
  • Page 86 12MXT 28000 T16A T16B T16C Fig. 5 Axles tool (DANA) 1 - 5450060 2 - 5450061 3 - 5450062 4 - 5450063 5 - 5450064...
  • Page 87 28000 12MXT...
  • Page 88 GROUPE MECALAC MECALAC S.A.S. - Parc des Glaisins - 2, av. du Pré de Challes F-74940 Annecy-le-Vieux - Tél. : +33 (0)4 50 64 01 63 - Fax : +33 (0)4 50 64 02 79 www.mecalac.com...

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