koldsteele
Well-Known Member
Hitachi ex55ur gray market machine ...Problem in the stick cylinder circut ( i think hitachi calls it the Arm cylinder) .No electric solenoids just pilot oil ...
Arm cylinder will be extremely slow on the curl side ..I swapped hoses at the valve and the problem moved to the extend side ..therefore I feel the cylinder it self is ok ..I then swapped pilot oil cicut and problem stayed on the extend circut ..
I took the spool out of the valve and was pretty tight in the the bore ..Papered the valve and cleaned the bore put back together and same thing ....I then pulled the whole vale body out of the stack valve and took it apart ..not seeing anything obvious ..
The bad thing is by the Hitachi parts break down there is no part # for the housing (of course nobody is working today so really cant do more research on the housing) ...I was wondering if I should swap this valve pack with one from say the boom valve and see if i move my problem there ???
Anyone have any problems like this ??
Arm cylinder will be extremely slow on the curl side ..I swapped hoses at the valve and the problem moved to the extend side ..therefore I feel the cylinder it self is ok ..I then swapped pilot oil cicut and problem stayed on the extend circut ..
I took the spool out of the valve and was pretty tight in the the bore ..Papered the valve and cleaned the bore put back together and same thing ....I then pulled the whole vale body out of the stack valve and took it apart ..not seeing anything obvious ..
The bad thing is by the Hitachi parts break down there is no part # for the housing (of course nobody is working today so really cant do more research on the housing) ...I was wondering if I should swap this valve pack with one from say the boom valve and see if i move my problem there ???
Anyone have any problems like this ??