Hi there!
PC160LC-7K
S/N K40627
I have some long lasting and slowly increased (about 1000h ago) and difficult to explain problems with engine and hydraulic operation.
Engine-
I already know part of the solution might be to this problem, but I would like to hear a different point of view before I dismantle it.
The engine will start very poorly when heated.
In winter, cold start even at -20C is no problem. Even if the engine is noticeably warm but has not been operated for a long hours, it can be started immediately.
It is very difficult to start just after working in hot conditions for a long hours.
No smoke, no lack of power, etc.
I think the fuel injection pump is to blame. It heats up and fails to provide the required productivity.
It should be mentioned that the engine "knocks" at start-up, but it is a little lacking to start.
I just haven't checked the valve clearances, but I doubt it can have that effect.
Hydraulic-
In short, when the hydraulics heat up properly, it create a high load on the engine, even if no function or movement is operated.
This load disappears when I try to move the boom sideways-swing motor. A little light touch of the joystick completely disappears the load. When the joystick is released (depending on how hot the hydraulics are) the load reappears and can even stop the engine.
When the hydraulics are cold, they operate much less normally.
It often happens that the boom cannot be moved to the side. It just stuck and swing motor do not work, but boom moves sideways if there are any force. In other words- boom moves freely and the excavator does not block it, cant move it either.
I believe that it is not possible to give precise advice on where exactly the problem is, but at least a rough direction.
It should be noted that there was metal debris when changing the hydraulic oil in the suction filter.
PC160LC-7K
S/N K40627
I have some long lasting and slowly increased (about 1000h ago) and difficult to explain problems with engine and hydraulic operation.
Engine-
I already know part of the solution might be to this problem, but I would like to hear a different point of view before I dismantle it.
The engine will start very poorly when heated.
In winter, cold start even at -20C is no problem. Even if the engine is noticeably warm but has not been operated for a long hours, it can be started immediately.
It is very difficult to start just after working in hot conditions for a long hours.
No smoke, no lack of power, etc.
I think the fuel injection pump is to blame. It heats up and fails to provide the required productivity.
It should be mentioned that the engine "knocks" at start-up, but it is a little lacking to start.
I just haven't checked the valve clearances, but I doubt it can have that effect.
Hydraulic-
In short, when the hydraulics heat up properly, it create a high load on the engine, even if no function or movement is operated.
This load disappears when I try to move the boom sideways-swing motor. A little light touch of the joystick completely disappears the load. When the joystick is released (depending on how hot the hydraulics are) the load reappears and can even stop the engine.
When the hydraulics are cold, they operate much less normally.
It often happens that the boom cannot be moved to the side. It just stuck and swing motor do not work, but boom moves sideways if there are any force. In other words- boom moves freely and the excavator does not block it, cant move it either.
I believe that it is not possible to give precise advice on where exactly the problem is, but at least a rough direction.
It should be noted that there was metal debris when changing the hydraulic oil in the suction filter.
