Service Training MALAGA

M300 Wheeled Excavators

1. INTRODUCTION

M300 Wheeled Excavators CHAPTER : INTRODUCTION

MACHINE OVERVIEW

M312 Batteries Fuel Tank

VA-Boom (Option)

Maestro Mobile Electronic System

Swing Pump Hydr. Tank – Closed Swing Circuit – Charging Pump

5 Stick Options

Main Pump Load Sensing Torque Controlled

Cooler 312 THEX Bucket Size

Engine 3054 DITA 81,0 kW/109 PS



300 HEX commonalty and features

Undercarriage Options Power Train: 2 or 4 Stabilizers Hydraulic Drive Motor Dozer blade – 2speed Transmission – Creeper Speed

The M312 is the smallest of the wheeled excavator family.

Page:

1-2

M300 Wheeled Excavators CHAPTER : INTRODUCTION

MACHINE OVERVIEW

M318 Hydr. Tank

Fuel Tank

Batteries

VA-Boom (Option)

Maestro Mobile Electronic System

Swing Pump – Closed Swing Circuit – Charging Pump

4 Stick Options

Main Pump Load Sensing Torque Controlled

Cooler

Engine 3116DIT 103.5 kW/139HP

Power Train: Hydraulic Drive Motor – 2speed Transmission – Creeper Speed

320 THEX Bucket Size

Undercarriage Options 2 or 4 Stabilizers Dozer blade



Main Features

The M318 is equipped with many features now common on 300-series HEX family, with the differencies of wheeled excavator. The machine has two independent hydraulic circuits with separate pump for implement and closed swing circuit.



Electronics

The machine operation is controlled by on board electronics.



Options

Several options of boom, stick and bucket arrangements are available



Undercarriage

Combinations of stabilizers and dozer blade are available

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1-3

M300 Wheeled Excavators CHAPTER : INTRODUCTION

CAB OPERATION Right Pilot Control Valve Boom DOWN Bucket IN

Bucket OUT

Travel Pedal Boom UP

FORWARD Option

REVERSE

Low Flow Attachment RIGHT Option

Upper Structure Position Lamp

Horn Brake Pedal VA-Boom Option (Hammer) Dozer/Stabilizer Pilot Valve

Left Console Lock

Left Pilot Control Valve Oscillating Axle/ Operating Brake

Stick OUT Swing LEFT

Swing RIGHT

Safety Pedal Swing Brake

Stick IN Low Flow Attachment LEFT

Option



Features

All hydraulics are controlled by pilot valves or electrically operated solenoid valves. Pilot control valves are pedals, dozer valve and ergonomally designed joysticks



Left console

Left console has next to pilot valves a safety function: The engine can be started only with console lifted and the machine can be operated with the console locked

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1-4

M300 Wheeled Excavators CHAPTER : INTRODUCTION

RIGHT CONSOL

!

P

! rpm

FRONT FLOOD LAMP

10

ROTATING BEACON

1

HEAD LAMP

PILOT CONTROL LOCK

REAR FLOOD LAMP SWING BRAKE TRAVEL ALARM CANCEL (OPTION)

PARKING BRAKE

CREEPER SPEED POWER MODE SELECTOR

HAZARD I

I

TRANSMISSION SPEED

TRAVEL LOCK

CAB HEATING

UPPER WIPER

LOWER WIPER HAMMER SPEED

OVERLOAD WARNING DEVICE LEFT FRONT STABILIZER* LEFT REAR STABILIZER*

RIGHT FRONT STABILIZER

)

)

RIGHT REAR STABILIZER

START AID 1) 0 1 2 3

KEY SWITCH 2)

AEC SWITCH

CONTROLLER BACKUP

*)

IS THE MACHINE EQUIPED WITH DOZER BLADE, IS ONE OF THOSE SWITCHES USED TO LOCK THE BLADE CIRCUIT.

HEAT FAN

AIRCONDITION MAN

1) M318 / M320 ONLY 2) M312 / M315 WITH START AID



Operation and monitoring

The right console incorporates operation and monitoring. According to the machine arrangement some switches are standard and some optional. All electrically operated functions of the machine are controlled from this console.

Page:

1-5

M300 Wheeled Excavators CHAPTER : INTRODUCTION

MONITORING HIGH BEAM

WARNING LIGHT

POWER MODE III

HYDRAULIC FILTER

TURN SIGNAL

SUPPLEMENTIAL STEERING AIR FILTER

POWER MODE II OVERLOAD PARKING BRAKE

!

P

HYDRAULIC OIL LOW TEMPERATURE

TRANS SPEED II

! POWER MODE I

LOW BRAKE PRESSURE

rpm

TRANS SPEED I

10

ALTERNATOR 1

ENGINE OIL PRESSURE

ENGINE SPEED DIAL

HYDRAULIC OIL HIGH TEMPERATURE

HYDRAULIC OIL TEMP. BARGRAPH

ENGINE COOLANT HIGH TEMPERATURE

COOLANT TEMP. BARGRAPH

FUEL LEVEL BELOW 10%

FUEL LEVEL BARGRAPH

Type of Warning Faulty Function

Symbol

LED

Sound Alarm Warning Light

!

Brake Pressure < 10000 kPa

! !

Engine Oil Pressure < 80kPa Engine Coolant Temp. > 100 C

!

Alternator

!

Air Filter > 25 kPa

!

o

Hydr. Oil High Temp. > 94 C

!

Hydr. Filter Plugged > 250 kPa

!

Overload > 15500 kPa

!

Fuel Level

!

Supplemental Steering

!

o



Function

The monitor has a display and diagnostic function



Display

Three bargraphs are used for actual valve display. Indicator lights are used to show different modes of operation



Warning

Warning indicators are used together with warning light and sound alarm (not shown) to indicate abnormal operation of the machine.

Page:

1-6

M300 Wheeled Excavators CHAPTER : INTRODUCTION

COMPONENTS LAYOUT

SWIVEL JOINT

DIAGNOSTIC CONNECTOR

ENGINE COOLER

HYDRAULIC COOLER ENGINE CONTROL CONTROLLER

SWING DRIVE BRAKE / PILOT PUMP FUEL FILTER

MAIN CONTROL VALVE FUSE BOX

ENGINE OIL FILTER STEERING / COOLING PUMP

BATTERIES PILOT MANIFOLD

ENGINE MAIN PUMP

FUEL TANK

SWING PUMP

HYDRAULIC FILTER HYDRAULIC TANK



Overview

SWING CIRCUIT FILTER

This graphic shows the layout of the main components located on the upper structure of the machine. The access to all those components is direct or by opening a door or cover. Same on all machines. Left side door access to the batteries, fuse and relay box, fuel level sight glass, refuelling pump and storage place. Right side door access to the engine, pumps and hydraulic oil level sight glass. Front door access to the radiator and coolant level sight glass. On the left side behind the cabin are doors and stairs for access to the upper structure of the machine. On the top are the covers for access to the main control valve, hydraulic oil tank, hydraulic oil filter and the engine.

Page:

1-7

M300 Wheeled Excavators CHAPTER : INTRODUCTION

MAESTRO MOBILE ELECTRONIC SYSTEM 2 3 1

!

P

5

!

4

rpm 10

6

1

7 21

26

20

14

24

25 12

11

I

I

13 17 19

16

18

CONTROLLER MC7 POWER MODE III INDICATOR POWER MODE II INDICATOR POWER MODE I INDICATOR HYDRAULIC OIL LOW TEMPERATURE 6 ENGINE SPEED DIAL 7 TRAVEL LOCK SWITCH 1 2 3 4 5

10

15

8 AUTOMATIC ENGINE CONTROL (AEC) SWITCH 9 RIGHT CONSOLE 10 POWER MODE SWITCH (I/II) 11 DIAGNOSTIC TOOL 12 MODE III SWITCH 13 TRAVEL PEDAL MAGNET 14 BRAKE LIGHT SWITCH

15 16 17 18 19 20 21 22 23 24 25 26

MAIN PUMP PRV SWING PUMP PRV PILOT MANIFOLD MAIN PUMP SWING PUMP ENGINE SPEED PICK-UP GOVERNOR ACTUATOR AND FEEDBACK SENSOR KEY START SWITCH CONTROLLER BACK-UP SWITCH PRESSURE SWITCH AEC-MAIN PUMP PRESSURE SWITCH AEC-SWING PUMP ENGINE SPEED CONTROL

0 1 2 3

22

8 9 23

MAN



Components

The operation of the machine is controlled by onboard microcontroller.



Function

The controller is permanently connected to components on the machine which are supplying constantly signals. According to preset parameters the controller is optimizing the hydraulic and engine horse - power for best fuel efficiency.



AEC

An automatic engine control will set the engine to low idle rpm when the machine is not in operation



Mode

Three modes of operation are selectable for different operations. Mode III is automatically selected by travel pedal, when pushed completely to travel forward. Mode II is selected by switch used for normal truck loading. Mode I is selected by switch used for fine and economical machine work.



Diagnostic

The machine operation diagnosis, change of parameters and troubleshooting of the system can be done with the Portable Diagnostic Tool (123 - 6471) or a Laptop - PC running the M300 Electronic Technician (ET) software.



Common Electronics

The electronic is common for all models. The differences are in the parameters for each machine.

Page:

1-8

M300 Wheeled Excavators CHAPTER : INTRODUCTION

M312



Function



Operation

TOWING MACHINE

Because of the transmission design the machine can not be moved without engine running. Both clutches in the transmission are engaged by springs and the transmission is locked. To be able to move the machine on clutch must be disengaged. This is done by inbuilt piston. Use 12mm hex key an turn the piston in until stop. Now the machine is free to move for short distance. If nessecary turn the piston out and in again to be able to move the machine for another distance.

Page:

1-9

M300 Wheeled Excavators CHAPTER : INTRODUCTION

M315 / M318 / M320

TOWING MACHINE

Lever Bolt



Operation

Because of the transmission design (clutch selection and operation and parking brake release is only possible with pilot oil) the machine can not be moved without engine running. The transmission is equipped with a lever, which disengages the transmission output shaft and allows free rolling of the machine. Lever is shown in engaged position. Remove bolt and turn the lever 90 degrees to disengage the transmission for towing.

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