QSL8. 9 Used Engine Assembly For Excavator R385 - 9 Water Cooling
Specification
| Car name: Complete Engine |
| Model Number: QSL8. 9 |
| Cylinder stroke: 145 |
| Application: Excavator |
| Cylinder diameter: 114 |
| valve: 24 valve |
| Cooling: Water cooling |
| Output: 264kw |
| Injection: Electric |
| Cylinders of number: 6 |
| Weight: 774kg |
Description
Pressure cap:
The radiator cap actually increases the boiling point of your
coolant by about 45 F (25 C). How does this simple cap do this? The
same way a pressure cooker increases the boiling temperature of
water.
The cap is actually a pressure release valve, and on car is usually
set at 15 psi. The boiling point of water increases when the water
is placed under pressure. When the fluid in the cooling system
heats up, it expands, causing the pressure to build up. The cap is
the only place where this pressure can escape so the setting of the
spring defines the pressure in the cooling system.
When the pressure reaches 15 psi, the pressure pushes the valve
open, allowing coolant to escape from the cooling system. This
coolant flows through the overflow tube into the bottom of the
overflow tank. This arrangement keeps air out of the system.
When the radiator cools back down, a vacuum is created in the
cooling system that pulls open another spring loaded valve, sucking
water back in from the bottom of the overflow tank to replace the
water that was expelled.
The Pump
The pump is a simple centrifugal pump driven by a belt connected to
the crankshaft of the engine. The pump circulates fluid whenever
the engine is running. The water pump uses centrifugal force to
send fluid to the outside while it spins, causing fluid to be drawn
from the centre continuously.
The inlet to the pump is located near the centre so that fluid
returning from the radiator hits the pump vanes. The pump vanes
fling the fluid to the outside of the pump, where it can enter the
engine. The fluid leaving the pump flows first through the engine
block and cylinder head, then into the radiator and finally back to
the pump.
