Group 7 Engine Overheat Prevention System - Hyundai R480LC-9S Service Manual

GROUP 7 ENGINE OVERHEAT PREVENTION

GROUP 7 ENGINE OVERHEAT PREVENTION SYSTEM

Emergency
warning lamp
Cluster
Coolant temperature
warning lamp
1. The engine coolant temperature or the hydraulic oil temperature is overheated over 100
warning lamp is ON and the pump input torque or the engine speed is reduced as below logic table.
2. LOGIC TABLE 2. LOGIC TABLE
Description
Activated
First step
warning
Canceled
Activated
Second step
warning
Canceled
Main control valve
Engine
ECM
MCU
Overheat warning signal
Hydraulic temperature
warning lamp
Condition
- Coolant or hydraulic oil temperature :
Above 100˚C
- Coolant or hydraulic oil temperature :
Less than 95˚C
- Coolant or hydraulic oil temperature :
Above 105˚C
- Coolant or hydraulic oil temperature :
Less than 100˚C
SYSTEM (CLUSTER TYPE 1)
Pilot pump
Main pump
Pump power
shift EPPR
Hydraulic temp signal
Drive signal
CN-16A
Accel dial signal
- Warning lamp & buzzer : ON
- Pump input torque is reduced.
- Return to pre-set the pump input torque.
- Emergency warning lamp pops up on the
center of LCD and the buzzer sounds.
- Engine speed is reduced after 10 seconds.
- Return to pre-set the engine speed.
- Hold pump input torque on the first step
warning.
5-19
Hydraulic temp sensor
CN-16
Normal
CN-16B
Emergency
Accel dial
4809S5MS12
Function
C, the
˚