HITACHI

UH041 SERIES EXCAVATOR SLEW TURNING PROBLEMS

Have a problem with the slew turning left. It does not brake or stop when I slew to the left. Like to hear from anyone with similar problems and how they solved it. Was told it was in the slew motor head but took the valve out and cleaned it then turned it around but still no change. Now next is check the relief brake valve below the 4 allen key bolts. Below is the head valve which was OK. Turned it around no change but you will see thge relief valve belwo bewteen the nuts

Valve has 4 bolts either side as above looking down

The head of the slew

Hitachi UH041 slew problems - heres what I found. Swap the two large relief valves on the top of the swing motor. You could swap the lines after to see if it is a main control valve issue or motor issue. Inspect the reliefs for debris while they are out. Swapping the lines will determine if the problem is in the motor or from the valve. If the swing works to the left and not to the right, then the issue is in the valve. If it does not change, the trouble will be in the swing motor.

Slew control lever. Note the red tag on the slew lever. Not sure how to check the controls in this controller so looking for any help as do not have a manual. How do I take this apart. I am baffled as to how to stop the slew truning then stopping.

Spring loaded valve on the controller. Seems fine but not sure how to take out?

Just need help solving my slew headache to brake the slew once turning

"Just another headache trying to solve "

UH031   UH033  UH041   UH043 UH051   UH052 all use 4BB1 Isuzu Motor so if anyone has a worksho manual willing to buy the pages with the slew motor and the controller to solve my problem

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