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7.2 TECHNICAL INTRODUCTION
SWE20F is an all hydraulic track excavator with beautiful appearance, 360° rotatable flat roof,
1080mm long small rear end, all of these ensure the work in limited place.
The engine is YANMAR 3 cylinder water-cooling diesel engine which has a normal rated power
of
13.4kW/2200rpm
. Use flexible supporting breadthwise
，
install the engine at the rear end of
machine.
Air filter is a fixed equipment of
SK
119540-12510
; safety device (optional) on engine inlet pipe
ensures more safety and stability of the engine.
Large capacity water tank with air exhaust device for the engine cooling system can effectively
protect engine and ensure normal work in high temperature and prevent overheating.
The main pump and engine directly connected with flange, maximum work pressure is 21 Mpa.
Use flexible shaft coupling installed in the diesel motor flywheel to drive the main pump,
perfectly avoid the influence on main pump, which is caused by the vibration of diesel motor.
Hydraulic system and pilot system
Hydraulic pump, main valve, drive motor and swing motor from Italy
Nachi
、
HC with perfect
quality and stable work condition can ensure the stable work of the whole system.
Full power qualified system can make full use of the engine power.
Aboratively matched drive control element can ensure the good control of the whole
machine.
The system can appropriately distribute and make use of flow to improve and promote
the machine performance.
High pressure double speed travel motor provides high traction and travel speed.
Adopt a 33L oil tank to supply the oil pump.
Oil pump supply oil to the entire working device through multitandem valve, and the
oil comes back to oil tank through oil cooler and magnetism papery filter.
The pilot control mechanism in cabin can ensure the multitandem valve action.
The gear pump connected with main pump can supply hydraulic oil to pilot oil passage.
The high precision high-pressure filter in pilot oil passage can avoid interferer from
outside.
Hydraulic oil cooling
We adopt aluminium oil air exchanging cooler. Hydraulic oil can be perfectly cooled.
Fuel device
Diesel tank can be supplied from a 23L fuel tank, the compact and appropriate design makes it
very easy to add fuel and clean.
Summary of Contents for SWE20F 2019
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Page 102: ...100 8 2 20FHYDRAULIC DRAWING...
