Service Training

MALAGA
365B HYDRAULIC EXCAVATOR

SEPARATED
COOLING
SYSTEM Francis
DEC 99
 CHAPTER : COOLING SYSTEM 2

COOLING PUMP LOCATION

 CHAPTER : COOLING SYSTEM 3

COOLING SYSTEM SCHEMATIC

HYD. FILTERS

Return from
Main Control Bypass Check
Valves Valve
(400kPa)

Oil
Back pressure Filter Bypass
Valve Valve
(300 kPa)
(150 kPa)

Water

COOLING
FAN MOTOR

HYD. TANK

45 cc/rev

From Cooling
Pump
Return Line
 CHAPTER : COOLING SYSTEM 4

COOLING REQUIREMENTS
150-5887
FAN
FAN SPEED CONTROL VALVE
MOTOR

HIGH
PRESSURE
CUT-OFF

FAN
PUMP

SPECIFICATIONS
RATED SPEED 1600 RPM
-ENGINETEMPERATURE
RATED TORQUE 158 N m
-HYDRAULICTEMPERATURE
- FAN MOTOR SPEED PICKUP ROTATION Clockwise
FLOW MAX. 63 L / Min.
RATED PRESS. 19800 kPa (HPC Setting 31500 kPa)
26 +/- 0.3MPa SUC. CONDITION SELF - PRIMING
at 300 mA
CONTROL ELECTRONIC CONTROL
31.5
MAX DISPL. 45 cc / rev.
30
DELIVERY PRESSURE (MPa)

20
5 +/- 0.3MPa
at 900 mA

10

200 400 600 800 1000 1200

ELECTRONIC CURRENT SIGNAL (mA)
 CHAPTER : COOLING SYSTEM 5

365B HYDRAULIC FAN CIRCUIT

FAN
FAN SPEED CONTROL VALVE
MOTOR

HIGH
PRESSURE
CUT-OFF

FAN
PUMP

- ENGINE TEMPERATURE
- HYDRAULIC TEMPERATURE
- FAN MOTOR SPEED PICKUP