Shop manual máy đào HuynDai R170W-9 (Phần 5) - P5.7

Shop manual máy đào HuynDai R170W-9 (Phần 5) Phần hệ thống cơ điện tử

GROUP 7 ENGINE OVERHEAT PREVENTION SYSTEM

Main control valve

Engine

Main pump — Pilot pump

Pump power

shift EPPR

Emergency

warning lamp

Cluster

Hydraulic temp sensor

Accel dial

Hydraulic temperature warning lamp

14W95MS09

1 lf the engine coolant temperature or the hydraulic oil temperature is overheated over 100°C, the warning lamp is ON and the pump input torque or the engine speed is reduced as below logic table

2.LOGIC TABLE

Description Condition Function

Activated |" Coolant or hydraulic oil temperature : |- Warning lamp & buzzer : ON

First step Above 100°C - Pump absorption torque is reduced

warning Canceled - Coolant or hydraulic oil temperature :|- Return to pre-set the pump absorption

Less than 95°C torque

- Emergency warning lamp pops up on the

center of LCD and the buzzer sounds

- Engine speed is reduced after 10 seconds

- Coolant or hydraulic oil temperature :

Activated Above 105°C

Second step

warning - Return to pre-set the engine speed

- Coolant or hydraulic oil temperature : ;

Canceled Less than 100°C Hold pump absorption torque on the first

step warning

5-10