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Recent content by garyw

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    Hitachi zx290lc-5 coolant overflow

    I'm assuming its a 4HK1 engine that's fitted to the machine? I would like to think that the EGR coolers have been checked on the machine? I've seen many a customer go down the route of removing the head and it turns out to be a leaking EGR cooler. These are very prone to fail if not bled...
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    Hitachi ex 200-5

    Its located next to the fuse box below the diag port. When the switch is up its in engine learning mode, when its down its in pump learning. It should be centred for normal running
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    Hitachi 120-5 : Auxiliary circuit pressure relief

    According to the circuit diagram the aux circuit doesn't have relief valves in the control valve. They may be fitted external. Best thing to to is follow both aux lines coming from the control valve and see where they go. There'll probably be an external block with relief valves in that
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    Hitachi 870 making noise in the pump drive area

    Did you disassemble the pumps to check for any internal issues? Was the pump drain filter also cut open to check for any contamination? The pump drain filter generally gives a better idea of pump condition because the tank return filter catches metal from the whole system. the drain filter only...
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    Isuzu 6UZ1 Engine Failure

    There's no issues that i know of with the 6UZ1 engine. It seems just as reliable as the 6WG1 that it replaced in the Hitachi ZX470-5. Any info on what type of failure? What the suspected cause is?
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    Hitachi ZX 160LC-3 Power Loss Under Load

    It would be better if you knew exactly what light was coming on. Even a description of it. How quickly does the engine stall? Does is recover ok when you let the lever go or does it struggle slightly before recovering? Those machines very rarely give hydraulic issues to be honest but it's not...
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    Zaxis 210-1 throttle not revving enough

    It's a difficult one mate without MPDr software. You would need to make sure the position sensor in the stepper motor reads 2.5v at idle. Basically the middle wire of the 3 pin plug on the stepper motor. After learnings complete, this should be far away from 2.50v give or take around 0.05v. Once...
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    Does anyone know JD 490E PVC Ground source location?

    According to the diagram, the ground for the PVC is located on a branch of the cab harness that also feeds the dome light, the wiper and a speaker. It'll probably be a little eyelet bolted on to the cab body.
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    hitachi 670 dramas

    Are you reading the code through the monitor or by using MPDr? If your using MPDr when you start troubleshooting, once it lists the fault codes, hit the retry button several times. Sometimes it takes up to 20 times before the engine codes clear because on the dash 3 machines the engine codes...
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    hitachi 670 dramas

    When you hit troubleshoot and get the list of faults, you hit "retry" several times and any faults remaining are still active. The faults above are 102-3 Boost pressure sensor low voltage fault 636-2 G sensor fault( this fault WILL prevent the engine from starting) 10001-3 EGR position...
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    hitachi 670 dramas

    After you replaced all the parts did all the fault codes clear ok?
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    deere 160lc problems

    Sounds like your Deere engineer is just guessing and its cost you $$$$$ already. Very rarely a hydraulic pump will cause engine stall. Its more than likely either the torque control system on the machine or the regulators that are causing it. I'm not familiar with the machine but i know in the...
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    HITACHI ZX350LC-3 ENGINE BOGS DOWN

    That's a strange issue indeed. It's unusual for the engine to perform ok at low idle but then stall at high rpm. Just so i understand. Your saying that at low idle, when you raise the boom, pull the arm in/ out, use the bucket etc the engine holds it's rpm. But when you increase the rpm above...
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    HITACHI ZX350LC-3 ENGINE BOGS DOWN

    None of the sensors on the pump would cause this issue. It sounds as though the pumps are not backing off enough. The pumps are basically regulated by their own pressure. As each pump pressure rises, the delivery pressure is routed up to the pump regulators to back them off. Are you 100%...
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    Hitachi EX135UR-5 won't throttle up

    I have manuals here but i suspect their for an earlier model. I doubt they'll be far wrong though. Is there a learning switch and diag connector next to a fuse box behind the seat? Yoy meantion that you need to push and hold the learning switch to override the position sensors? There should...
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