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When the stick is digging (retracting inward), the function of returning the oil pushed out from the side of the piston rod of the stick hydraulic cylinder to the bottom of the hydraulic cylinder (...
System fault diagnosis of all actuators of the excavator and related fault code display! A-1 Excavator all actuators are slow and no related fault codes are displayed. 1) Due to some reasons or due...
A8V series hydraulic pumps (including A8V86 and A8V115) are produced by UCHIDA, Japan, and are used on DH200W-Ⅲ excavators (tire type). 1 Overview This kind of hydraulic pump has one input shaft, t...
Because the walking device has both the support and operation of the hydraulic excavator, the walking device of the hydraulic excavator should try to meet the following requirements: (1) There shou...
When the spool valve of the main control valve is suddenly removed from the neutral position (to the working position), the reverse regulation pressure will drop (pressure drop is inversely proport...
1) DH220LC-3, DH280LC-3, DH330LC-3, DH200W-3 excavators, using Toshiba (TOSHI-BA) DX22 (28) type main control valve, with boom priority function. 2) The large-character DH0L.C-m crawler excavator u...
If the engine control system is not adjusted properly, the engine will be overloaded, and the operating and walking speed will be reduced, and the performance of the excavator will not be able to b...
Kobelco excavator multi-pump multi-channel variable, quantitative mixing system is a new type of hydraulic system, which can make full use of the power of the excavator and make the excavator bette...
1.1 working principle The crawler walking device of Daewoo excavator consists of "four wheels and one belt" (that is, driving wheel 2, guide wheel 7, supporting wheel 3, supporting wheel ...
Kobelco excavator engine parking device circuit is composed of start switch, engine parking motor, and engine parking relay. Its actions are divided into engine operation and engine parking. 1. The...
