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
Page:
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
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.
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.
Page:
1-10
manual-caterpillar-m300-wheeled-excavators ...
Try one of the apps below to open or edit this item. manual-caterpillar-m300-wheeled-excavators-overview-cab-monitoring-components-system.pdf.
